2017-07-25 00:46:30 +02:00
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/******************************************************************************
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* drivers/wireless/spirit/lib/spirit_timer.c
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* Configuration and management of SPIRIT timers.
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*
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* Copyright(c) 2015 STMicroelectronics
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* Author: VMA division - AMS
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* Version 3.2.2 08-July-2015
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*
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* Adapted for NuttX by:
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of STMicroelectronics nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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******************************************************************************/
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/******************************************************************************
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* Included Files
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******************************************************************************/
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#include <assert.h>
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2017-07-28 02:04:35 +02:00
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#include "spirit_config.h"
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2017-07-25 00:46:30 +02:00
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#include "spirit_timer.h"
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#include "spirit_radio.h"
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#include "spirit_spi.h"
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/******************************************************************************
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* Pre-processor Definitions
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******************************************************************************/
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/* Returns the absolute value. */
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#define S_ABS(a) ((a) > 0 ? (a) : -(a))
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/******************************************************************************
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2017-07-28 02:04:35 +02:00
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* Public Functions
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2017-07-25 00:46:30 +02:00
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******************************************************************************/
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/******************************************************************************
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2017-07-28 02:04:35 +02:00
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* Name: spirit_timer_enable_ldcrmode
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2017-07-25 00:46:30 +02:00
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*
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* Description:
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2017-07-28 02:04:35 +02:00
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* Enables or Disables the LDCR mode.
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2017-07-25 00:46:30 +02:00
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*
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2017-07-28 02:04:35 +02:00
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* Input Parameters:
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* spirit - Reference to a Spirit library state structure instance
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* newstate - New state for LDCR mode.
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2017-07-25 00:46:30 +02:00
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*
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* Returned Value:
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2017-07-28 02:04:35 +02:00
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* Zero (OK) on success; a negated errno value on failure.
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2017-07-25 00:46:30 +02:00
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*
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******************************************************************************/
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2017-07-28 02:04:35 +02:00
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int spirit_timer_enable_ldcrmode(FAR struct spirit_library_s *spirit,
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enum spirit_functional_state_e newstate)
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{
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uint8_t regval;
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int ret;
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/* Reads the register value */
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ret = spirit_reg_read(spirit, PROTOCOL2_BASE, ®val, 1);
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if (ret >= 0)
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{
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/* Mask the read value to enable or disable the LDC mode */
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if (newstate == S_ENABLE)
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{
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regval |= PROTOCOL2_LDC_MODE_MASK;
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}
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else
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{
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regval &= ~PROTOCOL2_LDC_MODE_MASK;
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}
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/* Write to the register to Enable or Disable the LDCR mode */
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ret = spirit_reg_write(spirit, PROTOCOL2_BASE, ®val, 1);
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}
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2019-12-05 18:49:12 +01:00
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return ret;
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2017-07-28 02:04:35 +02:00
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}
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2017-07-25 00:46:30 +02:00
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/******************************************************************************
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2017-07-28 02:04:35 +02:00
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* Name: spirit_timer_enable_autoreload
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*
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* Description:
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* Enables or Disables the LDCR timer reloading with the value stored in the
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* LDCR_RELOAD registers.
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*
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* Input Parameters:
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* spirit - Reference to a Spirit library state structure instance
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* newstate - New state for LDCR reloading.
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*
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* Returned Value:
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* Zero (OK) on success; a negated errno value on failure.
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*
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******************************************************************************/
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int spirit_timer_enable_autoreload(FAR struct spirit_library_s *spirit,
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enum spirit_functional_state_e newstate)
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{
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uint8_t regval;
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int ret;
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/* Reads the register value */
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ret = spirit_reg_read(spirit, PROTOCOL1_BASE, ®val, 1);
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if (ret >= 0)
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{
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2020-02-23 09:50:23 +01:00
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/* Mask the read value to enable or disable the reload on sync mode */
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2017-07-28 02:04:35 +02:00
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if (newstate == S_ENABLE)
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{
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regval |= PROTOCOL1_LDC_RELOAD_ON_SYNC_MASK;
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}
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else
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{
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regval &= ~PROTOCOL1_LDC_RELOAD_ON_SYNC_MASK;
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}
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/* Writes the register to Enable or Disable the Auto Reload */
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ret = spirit_reg_write(spirit, PROTOCOL1_BASE, ®val, 1);
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}
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return ret;
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}
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/******************************************************************************
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* Name: spirit_timer_get_autoreload
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*
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* Description:
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* Returns the LDCR timer reload bit.
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*
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* Input Parameters:
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* spirit - Reference to a Spirit library state structure instance
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*
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* Returned Value:
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* Value of the reload bit.
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*
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******************************************************************************/
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enum spirit_functional_state_e
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spirit_timer_get_autoreload(FAR struct spirit_library_s *spirit)
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{
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uint8_t regval;
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/* Reads the register value */
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2020-01-02 17:49:34 +01:00
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spirit_reg_read(spirit, PROTOCOL1_BASE, ®val, 1);
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2017-07-28 02:04:35 +02:00
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return (enum spirit_functional_state_e)(regval & 0x80);
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}
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/******************************************************************************
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* Name: spirit_timer_setup_rxtimeout
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*
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* Description:
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* Sets the RX timeout timer initialization registers with the values of
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* COUNTER and PRESCALER according to the formula: Trx=PRESCALER*COUNTER*Tck.
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* Remember that it is possible to have infinite RX_Timeout writing 0 in the
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* RX_Timeout_Counter and/or RX_Timeout_Prescaler registers.
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*
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* Input Parameters:
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* spirit - Reference to a Spirit library state structure instance
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* counter - Value for the timer counter.
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* prescaler - Value for the timer prescaler.
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*
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* Returned Value:
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* Zero (OK) on success; a negated errno value on failure.
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*
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2017-07-25 00:46:30 +02:00
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******************************************************************************/
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2017-07-28 02:04:35 +02:00
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int spirit_timer_setup_rxtimeout(FAR struct spirit_library_s *spirit,
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uint8_t counter, uint8_t prescaler)
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{
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2019-12-05 18:49:12 +01:00
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uint8_t regval[2] =
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{
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prescaler, counter
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};
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2017-07-28 02:04:35 +02:00
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/* Writes the prescaler and counter value for RX timeout to the corresponding
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* register.
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*/
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return spirit_reg_write(spirit, TIMERS5_RX_TIMEOUT_PRESCALER_BASE, regval, 2);
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}
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2017-07-25 00:46:30 +02:00
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/******************************************************************************
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* Name: spirit_timer_set_rxtimeout
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*
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* Description:
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2017-07-28 02:04:35 +02:00
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* Sets the RX timeout timer counter and prescaler from the desired value in
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* ms. it is possible to fix the RX_Timeout to a minimum value of 50.417us
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* to a maximum value of about 3.28 s.
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*
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* Input Parameters:
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* spirit - Reference to a Spirit library state structure instance
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* desired - Desired timer value.
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*
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* Returned Value:
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* Zero (OK) on success; a negated errno value on failure.
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*
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******************************************************************************/
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int spirit_timer_set_rxtimeout(FAR struct spirit_library_s *spirit,
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float desired)
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{
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uint8_t regval[2];
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/* Computes the counter and prescaler value */
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spirit_timer_calc_rxtimeout_values(spirit, desired, ®val[1], ®val[0]);
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/* Writes the prescaler and counter value for RX timeout in the corresponding
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* register.
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*/
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return spirit_reg_write(spirit, TIMERS5_RX_TIMEOUT_PRESCALER_BASE, regval, 2);
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}
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/******************************************************************************
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* Name: spirit_timer_set_rxtimeout_counter
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*
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* Description:
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2017-07-25 00:46:30 +02:00
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* Sets the RX timeout timer counter. If 'counter' is equal to 0 the
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* timeout is disabled.
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*
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* Input Parameters:
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* spirit - Reference to a Spirit library state structure instance
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* counter - value for the timer counter.
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*
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* Returned Value:
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* Zero (OK) on success; a negated errno value on failure.
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*
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******************************************************************************/
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2017-07-28 02:04:35 +02:00
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int spirit_timer_set_rxtimeout_counter(FAR struct spirit_library_s *spirit,
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uint8_t counter)
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2017-07-25 00:46:30 +02:00
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{
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/* Writes the counter value for RX timeout in the corresponding register */
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return spirit_reg_write(spirit, TIMERS4_RX_TIMEOUT_COUNTER_BASE, &counter, 1);
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}
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2017-07-28 02:04:35 +02:00
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/******************************************************************************
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* Name: spirit_timer_set_rxtimeout_prescaler
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*
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* Description:
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* Sets the RX timeout timer prescaler. If it is equal to 0 the timeout is
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* infinite.
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*
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* Input Parameters:
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* spirit - Reference to a Spirit library state structure instance
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* prescaler - Value for the timer prescaler.
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*
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* Returned Value:
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* Zero (OK) on success; a negated errno value on failure.
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*
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******************************************************************************/
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int spirit_timer_set_rxtimeout_prescaler(FAR struct spirit_library_s *spirit,
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uint8_t prescaler)
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{
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/* Writes the prescaler value for RX timeout in the corresponding register */
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return spirit_reg_write(spirit, TIMERS5_RX_TIMEOUT_PRESCALER_BASE, &prescaler, 1);
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}
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/******************************************************************************
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* Name: spirit_timer_get_rxtimeout_setup
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*
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* Description:
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* Returns the RX timeout timer.
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*
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* Input Parameters:
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* spirit - Reference to a Spirit library state structure instance
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* mstimeout - Pointer to the variable in which the timeout expressed in
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* milliseconds has to be stored. If the returned value is 0,
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* it means that the RX_Timeout is infinite.
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* counter - Pointer to the variable in which the timer counter has to
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* be stored.
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* prescaler - Pointer to the variable in which the timer prescaler has to
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* be stored.
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*
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* Returned Value:
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* Zero (OK) on success; a negated errno value on failure.
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*
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******************************************************************************/
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int spirit_timer_get_rxtimeout_setup(FAR struct spirit_library_s *spirit,
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FAR float *mstimeout,
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FAR uint8_t *counter,
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FAR uint8_t *prescaler)
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{
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float xtal_frequency;
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uint8_t regval[2];
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int ret;
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/* Reads the RX timeout registers value */
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ret = spirit_reg_read(spirit, TIMERS5_RX_TIMEOUT_PRESCALER_BASE, regval, 2);
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if (ret >= 0)
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{
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/* Returns values */
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*prescaler = regval[0];
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*counter = regval[1];
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xtal_frequency = (float)spirit->xtal_frequency;
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if (xtal_frequency > DOUBLE_XTAL_THR)
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{
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xtal_frequency /= 2.0;
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}
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xtal_frequency /= 1000.0;
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*mstimeout = (float)((regval[0] + 1) * regval[1] * (1210.0 / xtal_frequency));
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}
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return ret;
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}
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/******************************************************************************
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* Name: spirit_timer_setup_wakeuptimer
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*
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* Description:
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* Sets the LDCR wake up timer initialization registers with the values of
|
2019-12-05 18:49:12 +01:00
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* COUNTER and PRESCALER according to the formula:
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*
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* Twu=(PRESCALER + 1) * (COUNTER +1 ) * Tck,
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*
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2017-07-28 02:04:35 +02:00
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* where Tck = 28.818 us. The minimum vale of the wakeup timeout is 28.818us
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* (PRESCALER and COUNTER equals to 0) and the maximum value is about 1.89 s
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* (PRESCALER anc COUNTER equals to 255).
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*
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* Input Parameters:
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* spirit - Reference to a Spirit library state structure instance
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* counter - Value for the timer counter.
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* prescaler - Value for the timer prescaler.
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*
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* Returned Value:
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* Zero (OK) on success; a negated errno value on failure.
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*
|
|
|
|
******************************************************************************/
|
|
|
|
|
|
|
|
int spirit_timer_setup_wakeuptimer(FAR struct spirit_library_s *spirit,
|
|
|
|
uint8_t counter, uint8_t prescaler)
|
|
|
|
{
|
2019-12-05 18:49:12 +01:00
|
|
|
uint8_t regval[2] =
|
|
|
|
{
|
|
|
|
prescaler, counter
|
|
|
|
};
|
2017-07-28 02:04:35 +02:00
|
|
|
|
|
|
|
/* Writes the counter and prescaler value of wake-up timer in the
|
2019-12-05 18:49:12 +01:00
|
|
|
* corresponding register.
|
|
|
|
*/
|
2017-07-28 02:04:35 +02:00
|
|
|
|
|
|
|
return spirit_reg_write(spirit, TIMERS3_LDC_PRESCALER_BASE, regval, 2);
|
|
|
|
}
|
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
* Name: spirit_timer_set_wakeuptimer
|
|
|
|
*
|
|
|
|
* Description:
|
|
|
|
* Sets the LDCR wake up timer counter and prescaler from the desired value
|
|
|
|
* in ms, according to the formula: Twu=(PRESCALER +1)*(COUNTER+1)*Tck,
|
|
|
|
* where Tck = 28.818 us. The minimum vale of the wakeup timeout is
|
|
|
|
* 28.818us (PRESCALER and COUNTER equals to 0) and the maximum value is
|
|
|
|
* about 1.89 s (PRESCALER anc COUNTER equals to 255).
|
|
|
|
*
|
|
|
|
* Input Parameters:
|
|
|
|
* spirit - Reference to a Spirit library state structure instance
|
|
|
|
* desired - Desired timer value.
|
|
|
|
*
|
|
|
|
* Returned Value:
|
|
|
|
* Zero (OK) on success; a negated errno value on failure.
|
|
|
|
*
|
|
|
|
******************************************************************************/
|
|
|
|
|
|
|
|
int spirit_timer_set_wakeuptimer(FAR struct spirit_library_s *spirit,
|
|
|
|
float desired)
|
|
|
|
{
|
|
|
|
uint8_t regval[2];
|
|
|
|
|
|
|
|
/* Computes counter and prescaler */
|
|
|
|
|
|
|
|
spirit_timer_calc_wakeup_values(spirit, desired, ®val[1], ®val[0]);
|
|
|
|
|
|
|
|
/* Writes the counter and prescaler value of wake-up timer in the
|
2019-12-05 18:49:12 +01:00
|
|
|
* corresponding register.
|
|
|
|
*/
|
2017-07-28 02:04:35 +02:00
|
|
|
|
|
|
|
return spirit_reg_write(spirit, TIMERS3_LDC_PRESCALER_BASE, regval, 2);
|
|
|
|
}
|
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
* Name: spirit_timer_set_wakeuptimer_counter
|
|
|
|
*
|
|
|
|
* Description:
|
|
|
|
* Sets the LDCR wake up timer counter. Remember that this value is
|
|
|
|
* increased by one in the Twu calculation.
|
|
|
|
* Twu=(PRESCALER +1)*(COUNTER+1)*Tck, where Tck = 28.818 us
|
|
|
|
*
|
|
|
|
* Input Parameters:
|
|
|
|
* spirit - Reference to a Spirit library state structure instance
|
|
|
|
* counter - Value for the timer counter.
|
|
|
|
*
|
|
|
|
* Returned Value:
|
|
|
|
* Zero (OK) on success; a negated errno value on failure.
|
|
|
|
*
|
|
|
|
******************************************************************************/
|
|
|
|
|
|
|
|
int spirit_timer_set_wakeuptimer_counter(FAR struct spirit_library_s *spirit,
|
|
|
|
uint8_t counter)
|
|
|
|
{
|
|
|
|
/* Writes the counter value for Wake_Up timer in the corresponding register */
|
|
|
|
|
|
|
|
return spirit_reg_write(spirit, TIMERS2_LDC_COUNTER_BASE, &counter, 1);
|
|
|
|
}
|
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
* Name: spirit_timer_set_wakeuptimer_prescaler
|
|
|
|
*
|
|
|
|
* Description:
|
|
|
|
* Sets the LDCR wake up timer prescaler. Remember that this value is
|
|
|
|
* increased by one in the Twu calculation.
|
|
|
|
* Twu=(PRESCALER +1)*(COUNTER+1)*Tck, where Tck = 28.818 us
|
|
|
|
*
|
|
|
|
* Input Parameters:
|
|
|
|
* spirit - Reference to a Spirit library state structure instance
|
|
|
|
* prescaler - Value for the timer prescaler.
|
|
|
|
*
|
|
|
|
* Returned Value:
|
|
|
|
* Zero (OK) on success; a negated errno value on failure.
|
|
|
|
*
|
|
|
|
******************************************************************************/
|
|
|
|
|
|
|
|
int spirit_timer_set_wakeuptimer_prescaler(FAR struct spirit_library_s *spirit,
|
|
|
|
uint8_t prescaler)
|
|
|
|
{
|
|
|
|
/* Writes the prescaler value for Wake_Up timer in the corresponding
|
|
|
|
* register .
|
|
|
|
*/
|
|
|
|
|
|
|
|
return spirit_reg_write(spirit, TIMERS3_LDC_PRESCALER_BASE, &prescaler, 1);
|
|
|
|
}
|
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
* Name: spirit_timer_get_wakeuptimer_setup
|
|
|
|
*
|
|
|
|
* Description:
|
|
|
|
* Returns the LDCR wake up timer, according to the formula:
|
|
|
|
* Twu=(PRESCALER +1)*(COUNTER+1)*Tck, where Tck = 28.818 us.
|
|
|
|
*
|
|
|
|
* Input Parameters:
|
|
|
|
* spirit - Reference to a Spirit library state structure instance
|
|
|
|
* wakeupmsec - Pointer to the variable in which the wake-up time expressed
|
|
|
|
* in milliseconds has to be stored.
|
|
|
|
* counter - Pointer to the variable in which the timer counter has to
|
|
|
|
* be stored.
|
|
|
|
* prescaler - Pointer to the variable in which the timer prescaler has to
|
|
|
|
* be stored.
|
|
|
|
*
|
|
|
|
* Returned Value:
|
|
|
|
* Zero (OK) on success; a negated errno value on failure.
|
|
|
|
*
|
|
|
|
******************************************************************************/
|
|
|
|
|
|
|
|
int spirit_timer_get_wakeuptimer_setup(FAR struct spirit_library_s *spirit,
|
|
|
|
FAR float *wakeupmsec,
|
|
|
|
FAR uint8_t *counter,
|
|
|
|
FAR uint8_t *prescaler)
|
|
|
|
{
|
|
|
|
uint8_t regval[2];
|
|
|
|
float rco_freq;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
rco_freq = (float)spirit_timer_get_rcofrequency(spirit);
|
|
|
|
|
|
|
|
/* Reads the Wake_Up timer registers value */
|
|
|
|
|
|
|
|
ret = spirit_reg_read(spirit, TIMERS3_LDC_PRESCALER_BASE, regval, 2);
|
|
|
|
if (ret >= 0)
|
|
|
|
{
|
|
|
|
/* Return values */
|
|
|
|
|
|
|
|
*prescaler = regval[0];
|
|
|
|
*counter = regval[1];
|
2019-12-05 18:49:12 +01:00
|
|
|
*wakeupmsec = (float)((((*prescaler) + 1) * ((*counter) + 1) *
|
|
|
|
(1000.0 / rco_freq)));
|
2017-07-28 02:04:35 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
* Name: spirit_timer_setup_wakeuptimer_reload
|
|
|
|
*
|
|
|
|
* Description:
|
|
|
|
* Sets the LDCR wake up timer reloading registers with the values of
|
|
|
|
* COUNTER and PRESCALER according to the formula:
|
|
|
|
*
|
|
|
|
* Twu=(PRESCALER +1)*(COUNTER+1)*Tck
|
|
|
|
*
|
|
|
|
* where Tck = 28.818 us. The minimum vale of the wakeup timeout is
|
|
|
|
* 28.818us (PRESCALER and COUNTER equals to 0) and the maximum value is
|
|
|
|
* about 1.89 s (PRESCALER anc COUNTER equals to 255).
|
|
|
|
*
|
|
|
|
* Input Parameters:
|
|
|
|
* spirit - Reference to a Spirit library state structure instance
|
|
|
|
* counter - Reload value for the timer counter.
|
|
|
|
* prescaler - Reload value for the timer prescaler.
|
|
|
|
*
|
|
|
|
* Returned Value:
|
|
|
|
* Zero (OK) on success; a negated errno value on failure.
|
|
|
|
*
|
|
|
|
******************************************************************************/
|
|
|
|
|
|
|
|
int spirit_timer_setup_wakeuptimer_reload(FAR struct spirit_library_s *spirit,
|
|
|
|
uint8_t counter, uint8_t prescaler)
|
|
|
|
{
|
2019-12-05 18:49:12 +01:00
|
|
|
uint8_t regval[2] =
|
|
|
|
{
|
|
|
|
prescaler, counter
|
|
|
|
};
|
2017-07-28 02:04:35 +02:00
|
|
|
|
|
|
|
/* Write the counter and prescaler value of reload wake-up timer in the
|
|
|
|
* corresponding register
|
|
|
|
*/
|
|
|
|
|
|
|
|
return spirit_reg_write(spirit, TIMERS1_LDC_RELOAD_PRESCALER_BASE, regval, 2);
|
|
|
|
}
|
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
* Name: spirit_timer_wakeuptimer_reload
|
|
|
|
*
|
|
|
|
* Description:
|
|
|
|
* Sets the LDCR wake up reload timer counter and prescaler from the desired
|
|
|
|
* value in ms, according to the formula:
|
|
|
|
*
|
|
|
|
* Twu=(PRESCALER +1)*(COUNTER+1)*Tck
|
|
|
|
*
|
|
|
|
* where Tck = 28.818 us. The minimum vale of the wakeup timeout is 28.818us
|
|
|
|
* (PRESCALER and COUNTER equals to 0) and the maximum value is about 1.89 s
|
|
|
|
* (PRESCALER anc COUNTER equals to 255).
|
|
|
|
*
|
|
|
|
* Input Parameters:
|
|
|
|
* spirit - Reference to a Spirit library state structure instance
|
|
|
|
* desired - Desired timer value.
|
|
|
|
*
|
|
|
|
* Returned Value:
|
|
|
|
* Zero (OK) on success; a negated errno value on failure.
|
|
|
|
*
|
|
|
|
******************************************************************************/
|
|
|
|
|
|
|
|
int spirit_timer_wakeuptimer_reload(FAR struct spirit_library_s *spirit,
|
|
|
|
float desired)
|
|
|
|
{
|
|
|
|
uint8_t regval[2];
|
|
|
|
|
|
|
|
/* Computes counter and prescaler */
|
|
|
|
|
|
|
|
spirit_timer_calc_wakeup_values(spirit, desired, ®val[1], ®val[0]);
|
|
|
|
|
|
|
|
/* Writes the counter and prescaler value of reload wake-up timer in the
|
2019-12-05 18:49:12 +01:00
|
|
|
* corresponding register.
|
|
|
|
*/
|
2017-07-28 02:04:35 +02:00
|
|
|
|
|
|
|
return spirit_reg_write(spirit, TIMERS1_LDC_RELOAD_PRESCALER_BASE, regval, 2);
|
|
|
|
}
|
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
* Name: spirit_timer_set_wakeuptimer_reloadcounter
|
|
|
|
*
|
|
|
|
* Description:
|
|
|
|
* Sets the LDCR wake up timer reload counter. Remember that this value is
|
|
|
|
* increased by one in the Twu calculation.
|
|
|
|
*
|
|
|
|
* Twu=(PRESCALER +1)*(COUNTER+1)*Tck
|
|
|
|
*
|
|
|
|
* where Tck = 28.818 us.
|
|
|
|
*
|
|
|
|
* Input Parameters:
|
|
|
|
* spirit - Reference to a Spirit library state structure instance
|
|
|
|
* counter - Value for the timer counter.
|
|
|
|
*
|
|
|
|
* Returned Value:
|
|
|
|
* Zero (OK) on success; a negated errno value on failure.
|
|
|
|
*
|
|
|
|
******************************************************************************/
|
|
|
|
|
|
|
|
int spirit_timer_set_wakeuptimer_reloadcounter(FAR struct spirit_library_s *spirit,
|
|
|
|
uint8_t counter)
|
|
|
|
{
|
|
|
|
/* Write the counter value for reload Wake_Up timer in the corresponding
|
|
|
|
* register.
|
|
|
|
*/
|
|
|
|
|
|
|
|
return spirit_reg_write(spirit, TIMERS0_LDC_RELOAD_COUNTER_BASE, &counter, 1);
|
|
|
|
}
|
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
* Name: spirit_timer_set_wakeuptimer_reloadprescaler
|
|
|
|
*
|
|
|
|
* Description:
|
|
|
|
* Sets the LDCR wake up timer reload prescaler. Remember that this value
|
|
|
|
* is increasedd by one in the Twu calculation.
|
|
|
|
*
|
|
|
|
* Twu=(PRESCALER +1)*(COUNTER+1)*Tck
|
|
|
|
*
|
|
|
|
* where Tck = 28.818 us.
|
|
|
|
*
|
|
|
|
* Input Parameters:
|
|
|
|
* spirit - Reference to a Spirit library state structure instance
|
|
|
|
* prescaler - Value for the timer prescaler.
|
|
|
|
*
|
|
|
|
* Returned Value:
|
|
|
|
* Zero (OK) on success; a negated errno value on failure.
|
|
|
|
*
|
|
|
|
******************************************************************************/
|
|
|
|
|
|
|
|
int spirit_timer_set_wakeuptimer_reloadprescaler(FAR struct spirit_library_s *spirit,
|
|
|
|
uint8_t prescaler)
|
|
|
|
{
|
|
|
|
/* Writes the prescaler value for reload Wake_Up timer in the corresponding
|
|
|
|
* register.
|
|
|
|
*/
|
|
|
|
|
|
|
|
return spirit_reg_write(spirit, TIMERS1_LDC_RELOAD_PRESCALER_BASE, &prescaler, 1);
|
|
|
|
}
|
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
* Name: spirit_timer_get_wakeuptimer_reload_setup
|
|
|
|
*
|
|
|
|
* Description:
|
|
|
|
* Returns the LDCR wake up reload timer, according to the formula:
|
|
|
|
*
|
|
|
|
* Twu=(PRESCALER +1)*(COUNTER+1)*Tck
|
|
|
|
*
|
|
|
|
* where Tck = 28.818 us.
|
|
|
|
*
|
|
|
|
* Input Parameters:
|
|
|
|
* spirit - Reference to a Spirit library state structure instance
|
|
|
|
* reload - Pointer to the variable in which the wake-up reload time
|
|
|
|
* expressed in milliseconds has to be stored.
|
|
|
|
* counter - Pointer to the variable in which the timer counter has to be
|
|
|
|
* stored.
|
|
|
|
* prescaler - Pointer to the variable in which the timer prescaler has to
|
|
|
|
* be stored.
|
|
|
|
*
|
|
|
|
* Returned Value:
|
|
|
|
* Zero (OK) on success; a negated errno value on failure.
|
|
|
|
*
|
|
|
|
******************************************************************************/
|
|
|
|
|
|
|
|
int spirit_timer_get_wakeuptimer_reload_setup(FAR struct spirit_library_s *spirit,
|
|
|
|
FAR float *reload,
|
|
|
|
FAR uint8_t *counter,
|
|
|
|
FAR uint8_t *prescaler)
|
|
|
|
{
|
|
|
|
uint8_t regval[2];
|
|
|
|
float rco_freq;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
rco_freq = (float)spirit_timer_get_rcofrequency(spirit);
|
|
|
|
|
|
|
|
/* Reads the reload Wake_Up timer registers value */
|
|
|
|
|
|
|
|
ret = spirit_reg_read(spirit, TIMERS1_LDC_RELOAD_PRESCALER_BASE, regval, 2);
|
|
|
|
if (ret >= 0)
|
|
|
|
{
|
|
|
|
/* Returns values */
|
|
|
|
|
|
|
|
*prescaler = regval[0];
|
|
|
|
*counter = regval[1];
|
2019-12-05 18:49:12 +01:00
|
|
|
*reload = (float)((((*prescaler) + 1) * ((*counter) + 1) *
|
|
|
|
(1000.0 / rco_freq)));
|
2017-07-28 02:04:35 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
* Name: spirit_timer_get_rcofrequency
|
|
|
|
*
|
|
|
|
* Description:
|
|
|
|
* Computes and returns the RCO frequency. This frequency depends on the
|
|
|
|
* xtal frequency and the XTAL bit in register 0x01.
|
|
|
|
*
|
|
|
|
* Input Parameters:
|
|
|
|
* spirit - Reference to a Spirit library state structure instance
|
|
|
|
*
|
|
|
|
* Returned Value:
|
|
|
|
* RCO frequency in Hz.
|
|
|
|
*
|
|
|
|
******************************************************************************/
|
|
|
|
|
|
|
|
uint16_t spirit_timer_get_rcofrequency(FAR struct spirit_library_s *spirit)
|
|
|
|
{
|
|
|
|
uint32_t xtal_frequency = spirit->xtal_frequency;
|
|
|
|
uint16_t rco_freq = 34700;
|
|
|
|
uint8_t xtal_flag;
|
|
|
|
|
|
|
|
if (xtal_frequency > 30000000)
|
|
|
|
{
|
|
|
|
xtal_frequency /= 2;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (xtal_frequency == 25000000)
|
|
|
|
{
|
2020-01-02 17:49:34 +01:00
|
|
|
spirit_reg_read(spirit, 0x01, &xtal_flag, 1);
|
2017-07-28 02:04:35 +02:00
|
|
|
xtal_flag = (xtal_flag & 0x40);
|
|
|
|
|
|
|
|
if (xtal_flag == 0)
|
|
|
|
{
|
|
|
|
rco_freq = 36100;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
rco_freq = 33300;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return rco_freq;
|
|
|
|
}
|
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
* Name: spirit_timer_calc_wakeup_values
|
|
|
|
*
|
|
|
|
* Description:
|
|
|
|
* Computes the values of the wakeup timer counter and prescaler from the
|
|
|
|
* user time expressed in millisecond. The prescaler and the counter values
|
|
|
|
* are computed maintaining the prescaler value as small as possible in
|
|
|
|
* order to obtain the best resolution, and in the meantime minimizing the error.
|
|
|
|
*
|
|
|
|
* Input Parameters:
|
|
|
|
* spirit - Reference to a Spirit library state structure instance
|
|
|
|
* desired - Desired wakeup timeout in millisecs. Since the counter and
|
|
|
|
* prescaler are 8 bit registers the maximum reachable value is
|
|
|
|
* maxTime = fTclk x 256 x 256.
|
|
|
|
* counter - Pointer to the variable in which the value for the wakeup
|
|
|
|
* timer counter has to be stored.
|
|
|
|
* prescaler - Pointer to the variable in which the value for the wakeup
|
|
|
|
* timer prescaler has to be stored.
|
|
|
|
*
|
|
|
|
* Returned Value:
|
|
|
|
* None
|
|
|
|
*
|
|
|
|
******************************************************************************/
|
|
|
|
|
|
|
|
void spirit_timer_calc_wakeup_values(FAR struct spirit_library_s *spirit,
|
|
|
|
float desired, FAR uint8_t *counter,
|
|
|
|
FAR uint8_t *prescaler)
|
|
|
|
{
|
2019-12-05 18:49:12 +01:00
|
|
|
float rco_freq;
|
|
|
|
float err;
|
2017-07-28 02:04:35 +02:00
|
|
|
uint32_t n;
|
|
|
|
|
|
|
|
rco_freq = ((float)spirit_timer_get_rcofrequency(spirit)) / 1000;
|
|
|
|
|
|
|
|
/* N cycles in the time base of the timer: - clock of the timer is RCO
|
|
|
|
* frequency - divide times 1000 more because we have an input in ms
|
2019-12-05 18:49:12 +01:00
|
|
|
* (variable rco_freq is already this frequency divided by 1000).
|
|
|
|
*/
|
2017-07-28 02:04:35 +02:00
|
|
|
|
|
|
|
n = (uint32_t)(desired * rco_freq);
|
|
|
|
|
|
|
|
/* check if it is possible to reach that target with prescaler and counter of
|
2019-12-05 18:49:12 +01:00
|
|
|
* spirit1.
|
|
|
|
*/
|
2017-07-28 02:04:35 +02:00
|
|
|
|
|
|
|
if (n / 0xff > 0xfd)
|
|
|
|
{
|
|
|
|
/* if not return the maximum possible value */
|
|
|
|
|
|
|
|
*counter = 0xff;
|
|
|
|
*prescaler = 0xff;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* prescaler is really 2 as min value */
|
|
|
|
|
|
|
|
*prescaler = (n / 0xff) + 2;
|
|
|
|
*counter = n / (*prescaler);
|
|
|
|
|
|
|
|
/* check if the error is minimum */
|
|
|
|
|
|
|
|
err = S_ABS((float)(*counter) * (*prescaler) / rco_freq - desired);
|
|
|
|
|
|
|
|
if ((*counter) <= 254)
|
|
|
|
{
|
|
|
|
if (S_ABS((float)((*counter) + 1) * (*prescaler) / rco_freq - desired) < err)
|
|
|
|
{
|
|
|
|
(*counter)++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* decrement prescaler and counter according to the logic of this timer in
|
|
|
|
* spirit1.
|
|
|
|
*/
|
|
|
|
|
|
|
|
(*prescaler)--;
|
|
|
|
if (*counter > 1)
|
|
|
|
{
|
|
|
|
(*counter)--;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
*counter = 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
* Name: spirit_timer_calc_rxtimeout_values
|
|
|
|
*
|
|
|
|
* Description:
|
|
|
|
* Computes the values of the rx_timeout timer counter and prescaler from
|
|
|
|
* the user time expressed in millisecond. The prescaler and the counter
|
|
|
|
* values are computed maintaining the prescaler value as small as possible
|
|
|
|
* in order to obtain the best resolution, and in the meantime minimizing
|
|
|
|
* the error.
|
|
|
|
*
|
|
|
|
* Input Parameters:
|
|
|
|
* spirit - Reference to a Spirit library state structure instance
|
|
|
|
* desired - Desired rx_timeout in millisecs. Since the counter and
|
|
|
|
* prescaler are 8 bit registers the maximum reachable value
|
|
|
|
* is maxTime = fTclk x 255 x 255.
|
|
|
|
* counter - Pointer to the variable in which the value for the rx_timeout
|
|
|
|
* counter has to be stored.
|
|
|
|
* prescaler - Pointer to the variable in which the value for the rx_timeout
|
|
|
|
* prescaler has to be stored.
|
|
|
|
*
|
|
|
|
* Returned Value:
|
|
|
|
* None
|
|
|
|
*
|
|
|
|
******************************************************************************/
|
|
|
|
|
|
|
|
void spirit_timer_calc_rxtimeout_values(FAR struct spirit_library_s *spirit,
|
|
|
|
float desired, FAR uint8_t *counter,
|
|
|
|
FAR uint8_t *prescaler)
|
|
|
|
{
|
|
|
|
uint32_t xtal_frequency = spirit->xtal_frequency;
|
|
|
|
uint32_t n;
|
|
|
|
float err;
|
|
|
|
|
|
|
|
/* if xtal_frequency is doubled divide it by 2 */
|
|
|
|
|
|
|
|
if (xtal_frequency > DOUBLE_XTAL_THR)
|
|
|
|
{
|
|
|
|
xtal_frequency >>= 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* N cycles in the time base of the timer: - clock of the timer is xtal/1210
|
|
|
|
* - divide times 1000 more because we have an input in ms.
|
|
|
|
*/
|
|
|
|
|
|
|
|
n = (uint32_t)(desired * xtal_frequency / 1210000);
|
|
|
|
|
|
|
|
/* check if it is possible to reach that target with prescaler and counter of
|
|
|
|
* spirit1.
|
|
|
|
*/
|
|
|
|
|
|
|
|
if (n / 0xff > 0xfd)
|
|
|
|
{
|
|
|
|
/* if not return the maximum possible value */
|
|
|
|
|
|
|
|
*counter = 0xff;
|
|
|
|
*prescaler = 0xff;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* prescaler is really 2 as min value */
|
|
|
|
|
|
|
|
*prescaler = (n / 0xff) + 2;
|
|
|
|
*counter = n / (*prescaler);
|
|
|
|
|
|
|
|
/* check if the error is minimum */
|
|
|
|
|
2019-12-05 18:49:12 +01:00
|
|
|
err = S_ABS((float)(*counter) * (*prescaler) * 1210000 /
|
|
|
|
xtal_frequency - desired);
|
2017-07-28 02:04:35 +02:00
|
|
|
|
|
|
|
if ((*counter) <= 254)
|
|
|
|
{
|
2019-12-05 18:49:12 +01:00
|
|
|
if (S_ABS((float)((*counter) + 1) * (*prescaler) * 1210000 /
|
|
|
|
xtal_frequency - desired) < err)
|
2017-07-28 02:04:35 +02:00
|
|
|
{
|
|
|
|
(*counter)++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* decrement prescaler and counter according to the logic of this timer in
|
2019-12-05 18:49:12 +01:00
|
|
|
* spirit1.
|
|
|
|
*/
|
2017-07-28 02:04:35 +02:00
|
|
|
|
|
|
|
(*prescaler)--;
|
|
|
|
if ((*counter) > 1)
|
|
|
|
{
|
|
|
|
(*counter)--;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
*counter = 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2017-07-25 00:46:30 +02:00
|
|
|
/******************************************************************************
|
|
|
|
* Name: spirit_timer_set_rxtimeout_stopcondition
|
|
|
|
*
|
|
|
|
* Description:
|
|
|
|
* Sets the RX timeout stop conditions.
|
|
|
|
*
|
|
|
|
* Input Parameters:
|
|
|
|
* spirit - Reference to a Spirit library state structure instance
|
|
|
|
* stopcondition - New stop condition.
|
|
|
|
*
|
|
|
|
* Returned Value:
|
|
|
|
* Zero (OK) on success; a negated errno value on failure.
|
|
|
|
*
|
|
|
|
******************************************************************************/
|
|
|
|
|
|
|
|
int spirit_timer_set_rxtimeout_stopcondition(FAR struct spirit_library_s *spirit,
|
|
|
|
enum spirit_rxtimeout_stopcondition_e
|
|
|
|
stopcondition)
|
|
|
|
{
|
|
|
|
uint8_t regval[2];
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
/* Check the parameters */
|
|
|
|
|
|
|
|
DEBUGASSERT(IS_RX_TIMEOUT_STOP_CONDITION(stopcondition));
|
|
|
|
|
|
|
|
/* Reads value on the PKT_FLT_OPTIONS and PROTOCOL2 register */
|
|
|
|
|
|
|
|
ret = spirit_reg_read(spirit, PCKT_FLT_OPTIONS_BASE, regval, 2);
|
|
|
|
if (ret >= 0)
|
|
|
|
{
|
|
|
|
regval[0] &= 0xbf;
|
|
|
|
regval[0] |= ((stopcondition & 0x08) << 3);
|
|
|
|
|
|
|
|
regval[1] &= 0x1f;
|
|
|
|
regval[1] |= (stopcondition << 5);
|
|
|
|
|
|
|
|
/* Write value to the PKT_FLT_OPTIONS and PROTOCOL2 register */
|
|
|
|
|
|
|
|
ret = spirit_reg_write(spirit, PCKT_FLT_OPTIONS_BASE, regval, 2);
|
|
|
|
}
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
2017-07-28 02:04:35 +02:00
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
* Name: spirit_timer_cmd_reload
|
|
|
|
*
|
|
|
|
* Description:
|
|
|
|
* Sends the LDC_RELOAD command to SPIRIT. Reload the LDC timer with the
|
|
|
|
* value stored in the LDC_PRESCALER / COUNTER registers.
|
|
|
|
*
|
|
|
|
* Input Parameters:
|
|
|
|
* spirit - Reference to a Spirit library state structure instance
|
|
|
|
*
|
|
|
|
* Returned Value:
|
|
|
|
* Zero (OK) on success; a negated errno value on failure.
|
|
|
|
*
|
|
|
|
******************************************************************************/
|
|
|
|
|
|
|
|
int spirit_timer_cmd_reload(FAR struct spirit_library_s *spirit)
|
|
|
|
{
|
|
|
|
/* Sends the CMD_LDC_RELOAD command */
|
|
|
|
|
|
|
|
return spirit_command(spirit, COMMAND_LDC_RELOAD);
|
|
|
|
}
|