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nuttx/configs/tm4c123g-launchpad/include/board.h
Gregory Nutt 9bed954924 Cosmet updates to comments and README files
2014-12-24 08:15:21 -06:00

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/************************************************************************************
* configs/tm4c123g-launchpad/include/board.h
*
* Copyright (C) 2014 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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 __CONFIGS_TMC4C123G_LAUNCHPAD_INCLUDE_BOARD_H
#define __CONFIGS_TMC4C123G_LAUNCHPAD_INCLUDE_BOARD_H
/************************************************************************************
* Included Files
************************************************************************************/
/************************************************************************************
* Pre-processor Definitions
************************************************************************************/
/* Clocking *************************************************************************/
/* RCC settings. Crystals on-board the TMC4C123G LaunchPad include:
*
* 16MHz connected to OSC0/1 (pins 40/41)
* 32.768kHz connected to XOSC0/1 (pins 34/36)
*/
#define SYSCON_RCC_XTAL SYSCON_RCC_XTAL16000KHZ /* On-board crystal is 16 MHz */
#define XTAL_FREQUENCY 16000000
/* Oscillator source is the main oscillator */
#define SYSCON_RCC_OSCSRC SYSCON_RCC_OSCSRC_MOSC
#define SYSCON_RCC2_OSCSRC SYSCON_RCC2_OSCSRC2_MOSC
#define OSCSRC_FREQUENCY XTAL_FREQUENCY
/* Use system divider = 4; this corresponds to a system clock frequency
* of (400 / 1) / 5 = 80MHz (Using RCC2 and DIV400).
*/
#define TIVA_SYSDIV 5
#define SYSCLK_FREQUENCY 80000000 /* 80MHz */
/* Other RCC settings:
*
* - Main and internal oscillators enabled.
* - PLL and sys dividers not bypassed
* - PLL not powered down
* - No auto-clock gating reset
*/
#define TIVA_RCC_VALUE (SYSCON_RCC_OSCSRC | SYSCON_RCC_XTAL | \
SYSCON_RCC_USESYSDIV | SYSCON_RCC_SYSDIV(TIVA_SYSDIV))
/* RCC2 settings
*
* - PLL and sys dividers not bypassed.
* - PLL not powered down
* - Not using RCC2
*
* When SYSCON_RCC2_DIV400 is not selected, SYSDIV2 is the divisor-1.
* When SYSCON_RCC2_DIV400 is selected, SYSDIV2 is the divisor-1)/2, plus
* the LSB:
*
* SYSDIV2 SYSDIV2LSB DIVISOR
* 0 N/A 2
* 1 0 3
* " 1 4
* 2 0 5
* " 1 6
* etc.
*/
#if (TIVA_SYSDIV & 1) == 0
# define TIVA_RCC2_VALUE (SYSCON_RCC2_OSCSRC | SYSCON_RCC2_SYSDIV2LSB | \
SYSCON_RCC2_SYSDIV_DIV400(TIVA_SYSDIV) | \
SYSCON_RCC2_DIV400 | SYSCON_RCC2_USERCC2)
#else
# define TIVA_RCC2_VALUE (SYSCON_RCC2_OSCSRC | SYSCON_RCC2_SYSDIV_DIV400(TIVA_SYSDIV) | \
SYSCON_RCC2_DIV400 | SYSCON_RCC2_USERCC2)
#endif
/* LED definitions ******************************************************************/
/* The TMC4C123G LaunchPad has a single RGB LED. There is only one visible LED which
* will vary in color. But, from the standpoint of the firmware, this appears as
* three LEDs:
*
* BOARD_LED_R -- Connected to PF1
* BOARD_LED_G -- Connected to PF3
* BOARD_LED_B -- Connected to PF2
*/
/* LED index values for use with tm4c_setled() */
#define BOARD_LED_R 0
#define BOARD_LED_G 1
#define BOARD_LED_B 2
#define BOARD_NLEDS 3
/* LED bits for use with tm4c_setleds() */
#define BOARD_LED1_BIT (1 << BOARD_LED1)
#define BOARD_LED2_BIT (1 << BOARD_LED2)
/* If CONFIG_ARCH_LEDS is defined, then automated support for the LaunchPad LEDs
* will be included in the build:
*
* OFF:
* - OFF means that the OS is still initializing. Initialization is very fast so
* if you see this at all, it probably means that the system is hanging up
* somewhere in the initialization phases.
*
* GREEN or GREEN-ish
* - This means that the OS completed initialization.
*
* Bluish:
* - Whenever and interrupt or signal handler is entered, the BLUE LED is
* illuminated and extinguished when the interrupt or signal handler exits.
* This will add a BLUE-ish tinge to the LED.
*
* Redish:
* - If a recovered assertion occurs, the RED component will be illuminated
* briefly while the assertion is handled. You will probably never see this.
*
* Flashing RED:
* - In the event of a fatal crash, the BLUE and GREEN components will be
* extinguished and the RED component will FLASH at a 2Hz rate.
*/
/* RED GREEN BLUE */
#define LED_STARTED 0 /* OFF OFF OFF */
#define LED_HEAPALLOCATE 0 /* OFF OFF OFF */
#define LED_IRQSENABLED 0 /* OFF OFF OFF */
#define LED_STACKCREATED 1 /* OFF ON OFF */
#define LED_INIRQ 2 /* NC NC ON (momentary) */
#define LED_SIGNAL 2 /* NC NC ON (momentary) */
#define LED_ASSERTION 3 /* ON NC NC (momentary) */
#define LED_PANIC 4 /* ON OFF OFF (flashing 2Hz) */
/* LED definitions ******************************************************************/
/* The TMC4C123G LaunchPad has a two buttons:
*
* BOARD_SW1 -- Connected to PF4
* BOARD_SW2 -- Connected to PF0
*/
#define BUTTON_SW1 0
#define BUTTON_SW2 1
#define NUM_BUTTONS 2
#define BUTTON_SW1_BIT (1 << BUTTON_SW1)
#define BUTTON_SW2_BIT (1 << BUTTON_SW2)
/* Pin Multiplexing Disambiguation **************************************************/
#define GPIO_UART1_CTS GPIO_UART1_CTS_1
#define GPIO_UART1_RTS GPIO_UART1_RTS_1
#define GPIO_UART1_RX GPIO_UART1_RX_1
#define GPIO_UART1_TX GPIO_UART1_TX_1
/************************************************************************************
* Public Function Prototypes
************************************************************************************/
#ifndef __ASSEMBLY__
/************************************************************************************
* Name: tiva_boardinitialize
*
* Description:
* All Tiva architectures must provide the following entry point. This entry
* point is called early in the intitialization -- after all memory has been
* configured and mapped but before any devices have been initialized.
*
************************************************************************************/
void tiva_boardinitialize(void);
/************************************************************************************
* Name: tm4c_ledinit, tm4c_setled, and tm4c_setleds
*
* Description:
* If CONFIG_ARCH_LEDS is defined, then NuttX will control the on-board LED. If
* CONFIG_ARCH_LEDS is not defined, then the following interfaces are available to
* control the LEDs from user applications.
*
************************************************************************************/
#ifndef CONFIG_ARCH_LEDS
void tm4c_ledinit(void);
void tm4c_setled(int led, bool ledon);
void tm4c_setleds(uint8_t ledset);
#endif
#endif /* __ASSEMBLY__ */
#endif /* __CONFIGS_TMC4C123G_LAUNCHPAD_INCLUDE_BOARD_H */
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