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LibrePilot/flight/PiOS/STM32F4xx/pios_sys.c

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/**
******************************************************************************
* @addtogroup PIOS PIOS Core hardware abstraction layer
* @{
* @addtogroup PIOS_SYS System Functions
* @brief PIOS System Initialization code
* @{
*
* @file pios_sys.c
* @author Michael Smith Copyright (C) 2011
* The OpenPilot Team, http://www.openpilot.org Copyright (C) 2012.
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* @brief Sets up basic STM32 system hardware, functions are called from Main.
* @see The GNU Public License (GPL) Version 3
*
*****************************************************************************/
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* Project Includes */
#include "pios.h"
#if defined(PIOS_INCLUDE_SYS)
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#define MEM8(addr) (*((volatile uint8_t *)(addr)))
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/* Private Function Prototypes */
static void NVIC_Configuration(void);
/**
* Initialises all system peripherals
*/
void PIOS_SYS_Init(void)
{
/* Setup STM32 system (RCC, clock, PLL and Flash configuration) - CMSIS Function */
SystemInit();
SystemCoreClockUpdate(); /* update SystemCoreClock for use elsewhere */
/*
* @todo might make sense to fetch the bus clocks and save them somewhere to avoid
* having to use the clunky get-all-clocks API everytime we need one.
*/
/* Initialise Basic NVIC */
/* do this early to ensure that we take exceptions in the right place */
NVIC_Configuration();
/* Init the delay system */
PIOS_DELAY_Init();
/*
* Turn on all the peripheral clocks.
* Micromanaging clocks makes no sense given the power situation in the system, so
* light up everything we might reasonably use here and just leave it on.
*/
RCC_AHB1PeriphClockCmd(
RCC_AHB1Periph_GPIOA |
RCC_AHB1Periph_GPIOB |
RCC_AHB1Periph_GPIOC |
RCC_AHB1Periph_GPIOD |
RCC_AHB1Periph_GPIOE |
RCC_AHB1Periph_GPIOF |
RCC_AHB1Periph_GPIOG |
RCC_AHB1Periph_GPIOH |
RCC_AHB1Periph_GPIOI |
RCC_AHB1Periph_CRC |
RCC_AHB1Periph_FLITF |
RCC_AHB1Periph_SRAM1 |
RCC_AHB1Periph_SRAM2 |
RCC_AHB1Periph_BKPSRAM |
RCC_AHB1Periph_DMA1 |
RCC_AHB1Periph_DMA2 |
//RCC_AHB1Periph_ETH_MAC | No ethernet
//RCC_AHB1Periph_ETH_MAC_Tx |
//RCC_AHB1Periph_ETH_MAC_Rx |
//RCC_AHB1Periph_ETH_MAC_PTP |
//RCC_AHB1Periph_OTG_HS | No high-speed USB (requires external PHY)
//RCC_AHB1Periph_OTG_HS_ULPI | No ULPI PHY (see above)
0, ENABLE);
RCC_AHB2PeriphClockCmd(
//RCC_AHB2Periph_DCMI | No camera @todo might make sense later for basic vision support?
//RCC_AHB2Periph_CRYP | No crypto
//RCC_AHB2Periph_HASH | No hash generator
//RCC_AHB2Periph_RNG | No random numbers @todo might be good to have later if entropy is desired
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//RCC_AHB2Periph_OTG_FS |
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0, ENABLE);
RCC_AHB3PeriphClockCmd(
//RCC_AHB3Periph_FSMC | No external static memory
0, ENABLE);
RCC_APB1PeriphClockCmd(
RCC_APB1Periph_TIM2 |
RCC_APB1Periph_TIM3 |
RCC_APB1Periph_TIM4 |
RCC_APB1Periph_TIM5 |
RCC_APB1Periph_TIM6 |
RCC_APB1Periph_TIM7 |
RCC_APB1Periph_TIM12 |
RCC_APB1Periph_TIM13 |
RCC_APB1Periph_TIM14 |
RCC_APB1Periph_WWDG |
RCC_APB1Periph_SPI2 |
RCC_APB1Periph_SPI3 |
RCC_APB1Periph_USART2 |
RCC_APB1Periph_USART3 |
RCC_APB1Periph_UART4 |
RCC_APB1Periph_UART5 |
RCC_APB1Periph_I2C1 |
RCC_APB1Periph_I2C2 |
RCC_APB1Periph_I2C3 |
RCC_APB1Periph_CAN1 |
RCC_APB1Periph_CAN2 |
RCC_APB1Periph_PWR |
RCC_APB1Periph_DAC |
0, ENABLE);
RCC_APB2PeriphClockCmd(
RCC_APB2Periph_TIM1 |
RCC_APB2Periph_TIM8 |
RCC_APB2Periph_USART1 |
RCC_APB2Periph_USART6 |
RCC_APB2Periph_ADC |
RCC_APB2Periph_ADC1 |
RCC_APB2Periph_ADC2 |
RCC_APB2Periph_ADC3 |
RCC_APB2Periph_SDIO |
RCC_APB2Periph_SPI1 |
RCC_APB2Periph_SYSCFG |
RCC_APB2Periph_TIM9 |
RCC_APB2Periph_TIM10 |
RCC_APB2Periph_TIM11 |
0, ENABLE);
/*
* Configure all pins as input / pullup to avoid issues with
* uncommitted pins, excepting special-function pins that we need to
* remain as-is.
*/
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_StructInit(&GPIO_InitStructure);
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; // default is un-pulled input
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All;
#if (PIOS_USB_ENABLED)
GPIO_InitStructure.GPIO_Pin &= ~(GPIO_Pin_11 | GPIO_Pin_12); // leave USB D+/D- alone
#endif
GPIO_InitStructure.GPIO_Pin &= ~(GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15); // leave JTAG pins alone
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All;
GPIO_InitStructure.GPIO_Pin &= ~(GPIO_Pin_3 | GPIO_Pin_4); // leave JTAG pins alone
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All;
GPIO_Init(GPIOC, &GPIO_InitStructure);
GPIO_Init(GPIOD, &GPIO_InitStructure);
GPIO_Init(GPIOE, &GPIO_InitStructure);
GPIO_Init(GPIOF, &GPIO_InitStructure);
GPIO_Init(GPIOG, &GPIO_InitStructure);
GPIO_Init(GPIOH, &GPIO_InitStructure);
GPIO_Init(GPIOI, &GPIO_InitStructure);
}
/**
* Shutdown PIOS and reset the microcontroller:<BR>
* <UL>
* <LI>Disable all RTOS tasks
* <LI>Disable all interrupts
* <LI>Turn off all board LEDs
* <LI>Reset STM32
* </UL>
* \return < 0 if reset failed
*/
int32_t PIOS_SYS_Reset(void)
{
/* Disable all RTOS tasks */
#if defined(PIOS_INCLUDE_FREERTOS)
/* port specific FreeRTOS function to disable tasks (nested) */
portENTER_CRITICAL();
#endif
// disable all interrupts
PIOS_IRQ_Disable();
// turn off all board LEDs
#if (PIOS_LED_NUM == 1)
PIOS_LED_Off(LED1);
#elif (PIOS_LED_NUM == 2)
PIOS_LED_Off(LED1);
PIOS_LED_Off(LED2);
#endif
/* XXX F10x port resets most (but not all) peripherals ... do we care? */
/* Reset STM32 */
NVIC_SystemReset();
while (1) ;
/* We will never reach this point */
return -1;
}
/**
* Returns the CPU's flash size (in bytes)
*/
uint32_t PIOS_SYS_getCPUFlashSize(void)
{
return ((uint32_t) MEM_SIZE); // it might be possible to locate in the OTP area, but haven't looked and not documented
}
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/**
* Returns the serial number as a string
* param[out] str pointer to a string which can store at least 32 digits + zero terminator!
* (24 digits returned for STM32)
* return < 0 if feature not supported
*/
int32_t PIOS_SYS_SerialNumberGetBinary(uint8_t *array)
{
int i;
/* Stored in the so called "electronic signature" */
for (i = 0; i < 12; ++i) {
uint8_t b = MEM8(0x1ffff7e8 + i);
array[i] = b;
}
/* No error */
return 0;
}
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/**
* Returns the serial number as a string
* param[out] str pointer to a string which can store at least 32 digits + zero terminator!
* (24 digits returned for STM32)
* return < 0 if feature not supported
*/
int32_t PIOS_SYS_SerialNumberGet(char *str)
{
int i;
/* Stored in the so called "electronic signature" */
for (i = 0; i < 24; ++i) {
uint8_t b = *(uint8_t *)(0x1fff7a10 + i/2);
if (!(i & 1))
b >>= 4;
b &= 0x0f;
str[i] = ((b > 9) ? ('A' - 10) : '0') + b;
}
str[i] = '\0';
/* No error */
return 0;
}
/**
* Configures Vector Table base location and SysTick
*/
static void NVIC_Configuration(void)
{
/* Set the Vector Table base address as specified in .ld file */
extern void *pios_isr_vector_table_base;
NVIC_SetVectorTable((uint32_t)&pios_isr_vector_table_base, 0x0);
/* 4 bits for Interrupt priorities so no sub priorities */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4);
/* Configure HCLK clock as SysTick clock source. */
SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK);
}
#ifdef USE_FULL_ASSERT
/**
* Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* \param[in] file pointer to the source file name
* \param[in] line assert_param error line source number
* \retval None
*/
void assert_failed(uint8_t * file, uint32_t line)
{
/* When serial debugging is implemented, use something like this. */
/* printf("Wrong parameters value: file %s on line %d\r\n", file, line); */
/* Setup the LEDs to Alternate */
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#if defined(PIOS_LED_ALARM)
PIOS_LED_On(PIOS_LED_ALARM);
#endif
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#if defined(PIOS_LED_HEARTBEAT)
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PIOS_LED_Off(PIOS_LED_HEARTBEAT);
#endif
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/* Infinite loop */
while (1) {
PIOS_LED_Toggle(LED1);
PIOS_LED_Toggle(LED2);
for (int i = 0; i < 1000000; i++) ;
}
}
#endif
#endif
/**
* @}
* @}
*/