nuttx/configs/photon/include/board.h

/************************************************************************************
 * configs/photon/include/board.h
 *
 *   Copyright (C) 2017 Gregory Nutt. All rights reserved.
 *   Author: Simon Piriou <spiriou31@gmail.com>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name NuttX nor the names of its contributors may be
 *    used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 ************************************************************************************/

#ifndef __CONFIG_PHOTON_INCLUDE_BOARD_H
#define __CONFIG_PHOTON_INCLUDE_BOARD_H

/************************************************************************************
 * Included Files
 ************************************************************************************/

#include <nuttx/config.h>

#ifndef __ASSEMBLY__
#  include <stdbool.h>
#endif

#include "stm32_rcc.h"
#include "stm32.h"

/************************************************************************************
 * Pre-processor Definitions
 ************************************************************************************/

/* Clocking *************************************************************************/
/* The Particle photon board features a single 26MHz crystal.
 *
 * This is the canonical configuration:
 *   System Clock source           : PLL (HSE)
 *   SYSCLK(Hz)                    : 120000000    Determined by PLL configuration
 *   HCLK(Hz)                      : 120000000    (STM32_RCC_CFGR_HPRE)
 *   AHB Prescaler                 : 1            (STM32_RCC_CFGR_HPRE)
 *   APB1 Prescaler                : 4            (STM32_RCC_CFGR_PPRE1)
 *   APB2 Prescaler                : 2            (STM32_RCC_CFGR_PPRE2)
 *   HSE Frequency(Hz)             : 26000000     (STM32_BOARD_XTAL)
 *   PLLM                          : 26           (STM32_PLLCFG_PLLM)
 *   PLLN                          : 240          (STM32_PLLCFG_PLLN)
 *   PLLP                          : 2            (STM32_PLLCFG_PLLP)
 *   PLLQ                          : 5            (STM32_PLLCFG_PLLQ)
 *   Main regulator output voltage : Scale1 mode  Needed for high speed SYSCLK
 *   Flash Latency(WS)             : 3
 *   Prefetch Buffer               : OFF
 *   Instruction cache             : ON
 *   Data cache                    : ON
 *   Require 48MHz for USB OTG HS  : Enabled
 *   SDIO and RNG clock
 */

/* HSI - 16 MHz RC factory-trimmed
 * LSI - 32 KHz RC
 * HSE - On-board crystal frequency is 26MHz
 * LSE - 32.768 kHz
 */

#define STM32_BOARD_XTAL        26000000ul

#define STM32_HSI_FREQUENCY     16000000ul
#define STM32_LSI_FREQUENCY     32000
#define STM32_HSE_FREQUENCY     STM32_BOARD_XTAL
#define STM32_LSE_FREQUENCY     32768

/* Main PLL Configuration.
 *
 * PLL source is HSE
 * PLL_VCO = (STM32_HSE_FREQUENCY / PLLM) * PLLN
 *         = (26,000,000 / 26) * 240
 *         = 240,000,000
 * SYSCLK  = PLL_VCO / PLLP
 *         = 240,000,000 / 2 = 120,000,000
 * USB OTG FS, SDIO and RNG Clock
 *         =  PLL_VCO / PLLQ
 *         = 48,000,000
 */

#define STM32_PLLCFG_PLLM       RCC_PLLCFG_PLLM(26)
#define STM32_PLLCFG_PLLN       RCC_PLLCFG_PLLN(240)
#define STM32_PLLCFG_PLLP       RCC_PLLCFG_PLLP_2
#define STM32_PLLCFG_PLLQ       RCC_PLLCFG_PLLQ(5)

#define STM32_SYSCLK_FREQUENCY  120000000ul

/* AHB clock (HCLK) is SYSCLK (120MHz) */

#define STM32_RCC_CFGR_HPRE     RCC_CFGR_HPRE_SYSCLK  /* HCLK  = SYSCLK / 1 */
#define STM32_HCLK_FREQUENCY    STM32_SYSCLK_FREQUENCY
#define STM32_BOARD_HCLK        STM32_HCLK_FREQUENCY  /* same as above, to satisfy compiler */

/* APB1 clock (PCLK1) is HCLK/4 (30MHz) */

#define STM32_RCC_CFGR_PPRE1    RCC_CFGR_PPRE1_HCLKd4     /* PCLK1 = HCLK / 4 */
#define STM32_PCLK1_FREQUENCY   (STM32_HCLK_FREQUENCY/4)

/* Timers driven from APB1 will be twice PCLK1 */

#define STM32_APB1_TIM2_CLKIN   (2*STM32_PCLK1_FREQUENCY)
#define STM32_APB1_TIM3_CLKIN   (2*STM32_PCLK1_FREQUENCY)
#define STM32_APB1_TIM4_CLKIN   (2*STM32_PCLK1_FREQUENCY)
#define STM32_APB1_TIM5_CLKIN   (2*STM32_PCLK1_FREQUENCY)
#define STM32_APB1_TIM6_CLKIN   (2*STM32_PCLK1_FREQUENCY)
#define STM32_APB1_TIM7_CLKIN   (2*STM32_PCLK1_FREQUENCY)
#define STM32_APB1_TIM12_CLKIN  (2*STM32_PCLK1_FREQUENCY)
#define STM32_APB1_TIM13_CLKIN  (2*STM32_PCLK1_FREQUENCY)
#define STM32_APB1_TIM14_CLKIN  (2*STM32_PCLK1_FREQUENCY)

/* APB2 clock (PCLK2) is HCLK/2 (60MHz) */

#define STM32_RCC_CFGR_PPRE2    RCC_CFGR_PPRE2_HCLKd2     /* PCLK2 = HCLK / 2 */
#define STM32_PCLK2_FREQUENCY   (STM32_HCLK_FREQUENCY/2)

/* Timers driven from APB2 will be twice PCLK2 */

#define STM32_APB2_TIM1_CLKIN   (2*STM32_PCLK2_FREQUENCY)
#define STM32_APB2_TIM8_CLKIN   (2*STM32_PCLK2_FREQUENCY)
#define STM32_APB2_TIM9_CLKIN   (2*STM32_PCLK2_FREQUENCY)
#define STM32_APB2_TIM10_CLKIN  (2*STM32_PCLK2_FREQUENCY)
#define STM32_APB2_TIM11_CLKIN  (2*STM32_PCLK2_FREQUENCY)

/* Timer Frequencies, if APBx is set to 1, frequency is same to APBx
 * otherwise frequency is 2xAPBx.
 * Note: TIM1,8 are on APB2, others on APB1
 */

#define BOARD_TIM1_FREQUENCY    STM32_HCLK_FREQUENCY
#define BOARD_TIM2_FREQUENCY    (STM32_HCLK_FREQUENCY / 2)
#define BOARD_TIM3_FREQUENCY    (STM32_HCLK_FREQUENCY / 2)
#define BOARD_TIM4_FREQUENCY    (STM32_HCLK_FREQUENCY / 2)
#define BOARD_TIM5_FREQUENCY    (STM32_HCLK_FREQUENCY / 2)
#define BOARD_TIM6_FREQUENCY    (STM32_HCLK_FREQUENCY / 2)
#define BOARD_TIM7_FREQUENCY    (STM32_HCLK_FREQUENCY / 2)
#define BOARD_TIM8_FREQUENCY    STM32_HCLK_FREQUENCY

/* USB OTG HS definitions ***********************************************************/
/* Do not enable external PHY clock or OTG_HS module will not work */

#undef  BOARD_ENABLE_USBOTG_HSULPI

/* LED definitions ******************************************************************/
/* LEDs
 *
 * A single LED is available driven by PA13.
 */

/* LED index values for use with board_userled() */

#define BOARD_LED1        0
#define BOARD_NLEDS       1

/* LED bits for use with board_userled_all() */

#define BOARD_LED1_BIT    (1 << BOARD_LED1)

/* These LEDs are not used by the board port unless CONFIG_ARCH_LEDS is
 * defined.  In that case, the usage by the board port is defined in
 * include/board.h and src/sam_autoleds.c. The LEDs are used to encode
 * OS-related events as follows:
 *
 *   ------------------- ---------------------------- ------
 *   SYMBOL                  Meaning                  LED
 *   ------------------- ---------------------------- ------   */

#define LED_STARTED      0 /* NuttX has been started  OFF      */
#define LED_HEAPALLOCATE 0 /* Heap has been allocated OFF      */
#define LED_IRQSENABLED  0 /* Interrupts enabled      OFF      */
#define LED_STACKCREATED 1 /* Idle stack created      ON       */
#define LED_INIRQ        2 /* In an interrupt         N/C      */
#define LED_SIGNAL       2 /* In a signal handler     N/C      */
#define LED_ASSERTION    2 /* An assertion failed     N/C      */
#define LED_PANIC        3 /* The system has crashed  FLASH    */
#undef  LED_IDLE           /* MCU is is sleep mode    Not used */

/* Thus if LED is statically on, NuttX has successfully  booted and is,
 * apparently, running normally.  If LED is flashing at approximately
 * 2Hz, then a fatal error has been detected and the system has halted.
 */

/* Button definitions ***************************************************************/

#define BOARD_BUTTON1     0
#define NUM_BUTTONS       1
#define BOARD_BUTTON1_BIT (1 << BOARD_BUTTON1)

/* Alternate function pin selections ************************************************/
/* UART1 */

#ifdef CONFIG_STM32_USART1
#  define GPIO_USART1_RX GPIO_USART1_RX_1
#  define GPIO_USART1_TX GPIO_USART1_TX_1
#endif

/* SPI1 */

#define GPIO_SPI1_MISO   GPIO_SPI1_MISO_1  /* PA6 */
#define GPIO_SPI1_MOSI   GPIO_SPI1_MOSI_1  /* PA7 */
#define GPIO_SPI1_SCK    GPIO_SPI1_SCK_1   /* PA5 */

/* SPI3 */

#define GPIO_SPI3_MISO   GPIO_SPI3_MISO_1  /* PB4 */
#define GPIO_SPI3_MOSI   GPIO_SPI3_MOSI_1  /* PB5 */
#define GPIO_SPI3_SCK    GPIO_SPI3_SCK_1   /* PB3 */

/* SDIO definitions *****************************************************************/

/* Note that slower clocking is required when DMA is disabled in order
 * to avoid RX overrun/TX underrun errors due to delayed responses
 * to service FIFOs in interrupt driven mode.
 *
 * These values have not been tuned!!!
 *
 * SDIOCLK=48MHz, SDIO_CK=SDIOCLK/(118+2)=400 KHz
 */

#define SDIO_INIT_CLKDIV        (118 << SDIO_CLKCR_CLKDIV_SHIFT)

/* DMA ON:  SDIOCLK=48MHz, SDIO_CK=SDIOCLK/(1+2)=16 MHz
 * DMA OFF: SDIOCLK=48MHz, SDIO_CK=SDIOCLK/(2+2)=12 MHz
 */

#ifdef CONFIG_SDIO_DMA
#  define SDIO_MMCXFR_CLKDIV    (1 << SDIO_CLKCR_CLKDIV_SHIFT)
#else
#  define SDIO_MMCXFR_CLKDIV    (2 << SDIO_CLKCR_CLKDIV_SHIFT)
#endif

/* DMA ON:  SDIOCLK=48MHz, SDIO_CK=SDIOCLK/(1+2)=16 MHz
 * DMA OFF: SDIOCLK=48MHz, SDIO_CK=SDIOCLK/(2+2)=12 MHz
 */

#ifdef CONFIG_SDIO_DMA
#  define SDIO_SDXFR_CLKDIV     (1 << SDIO_CLKCR_CLKDIV_SHIFT)
#else
#  define SDIO_SDXFR_CLKDIV     (2 << SDIO_CLKCR_CLKDIV_SHIFT)
#endif

/* DMA Channl/Stream Selections *****************************************************/
/* Stream selections are arbitrary for now but might become important in the future
 * if we set aside more DMA channels/streams.
 *
 * SDIO DMA
 *   DMAMAP_SDIO_1 = Channel 4, Stream 3
 *   DMAMAP_SDIO_2 = Channel 4, Stream 6
 */

#define DMAMAP_SDIO DMAMAP_SDIO_1

#endif  /* __CONFIG_PHOTON_INCLUDE_BOARD_H */