Initial commit
This commit is contained in:
176
Core/Src/System/syscalls.c
Normal file
176
Core/Src/System/syscalls.c
Normal file
@@ -0,0 +1,176 @@
|
||||
/**
|
||||
******************************************************************************
|
||||
* @file syscalls.c
|
||||
* @author Auto-generated by STM32CubeIDE
|
||||
* @brief STM32CubeIDE Minimal System calls file
|
||||
*
|
||||
* For more information about which c-functions
|
||||
* need which of these lowlevel functions
|
||||
* please consult the Newlib libc-manual
|
||||
******************************************************************************
|
||||
* @attention
|
||||
*
|
||||
* Copyright (c) 2020-2024 STMicroelectronics.
|
||||
* All rights reserved.
|
||||
*
|
||||
* This software is licensed under terms that can be found in the LICENSE file
|
||||
* in the root directory of this software component.
|
||||
* If no LICENSE file comes with this software, it is provided AS-IS.
|
||||
*
|
||||
******************************************************************************
|
||||
*/
|
||||
|
||||
/* Includes */
|
||||
#include <sys/stat.h>
|
||||
#include <stdlib.h>
|
||||
#include <errno.h>
|
||||
#include <stdio.h>
|
||||
#include <signal.h>
|
||||
#include <time.h>
|
||||
#include <sys/time.h>
|
||||
#include <sys/times.h>
|
||||
|
||||
|
||||
/* Variables */
|
||||
extern int __io_putchar(int ch) __attribute__((weak));
|
||||
extern int __io_getchar(void) __attribute__((weak));
|
||||
|
||||
|
||||
char *__env[1] = { 0 };
|
||||
char **environ = __env;
|
||||
|
||||
|
||||
/* Functions */
|
||||
void initialise_monitor_handles()
|
||||
{
|
||||
}
|
||||
|
||||
int _getpid(void)
|
||||
{
|
||||
return 1;
|
||||
}
|
||||
|
||||
int _kill(int pid, int sig)
|
||||
{
|
||||
(void)pid;
|
||||
(void)sig;
|
||||
errno = EINVAL;
|
||||
return -1;
|
||||
}
|
||||
|
||||
void _exit (int status)
|
||||
{
|
||||
_kill(status, -1);
|
||||
while (1) {} /* Make sure we hang here */
|
||||
}
|
||||
|
||||
__attribute__((weak)) int _read(int file, char *ptr, int len)
|
||||
{
|
||||
(void)file;
|
||||
int DataIdx;
|
||||
|
||||
for (DataIdx = 0; DataIdx < len; DataIdx++)
|
||||
{
|
||||
*ptr++ = __io_getchar();
|
||||
}
|
||||
|
||||
return len;
|
||||
}
|
||||
|
||||
__attribute__((weak)) int _write(int file, char *ptr, int len)
|
||||
{
|
||||
(void)file;
|
||||
int DataIdx;
|
||||
|
||||
for (DataIdx = 0; DataIdx < len; DataIdx++)
|
||||
{
|
||||
__io_putchar(*ptr++);
|
||||
}
|
||||
return len;
|
||||
}
|
||||
|
||||
int _close(int file)
|
||||
{
|
||||
(void)file;
|
||||
return -1;
|
||||
}
|
||||
|
||||
|
||||
int _fstat(int file, struct stat *st)
|
||||
{
|
||||
(void)file;
|
||||
st->st_mode = S_IFCHR;
|
||||
return 0;
|
||||
}
|
||||
|
||||
int _isatty(int file)
|
||||
{
|
||||
(void)file;
|
||||
return 1;
|
||||
}
|
||||
|
||||
int _lseek(int file, int ptr, int dir)
|
||||
{
|
||||
(void)file;
|
||||
(void)ptr;
|
||||
(void)dir;
|
||||
return 0;
|
||||
}
|
||||
|
||||
int _open(char *path, int flags, ...)
|
||||
{
|
||||
(void)path;
|
||||
(void)flags;
|
||||
/* Pretend like we always fail */
|
||||
return -1;
|
||||
}
|
||||
|
||||
int _wait(int *status)
|
||||
{
|
||||
(void)status;
|
||||
errno = ECHILD;
|
||||
return -1;
|
||||
}
|
||||
|
||||
int _unlink(char *name)
|
||||
{
|
||||
(void)name;
|
||||
errno = ENOENT;
|
||||
return -1;
|
||||
}
|
||||
|
||||
int _times(struct tms *buf)
|
||||
{
|
||||
(void)buf;
|
||||
return -1;
|
||||
}
|
||||
|
||||
int _stat(char *file, struct stat *st)
|
||||
{
|
||||
(void)file;
|
||||
st->st_mode = S_IFCHR;
|
||||
return 0;
|
||||
}
|
||||
|
||||
int _link(char *old, char *new)
|
||||
{
|
||||
(void)old;
|
||||
(void)new;
|
||||
errno = EMLINK;
|
||||
return -1;
|
||||
}
|
||||
|
||||
int _fork(void)
|
||||
{
|
||||
errno = EAGAIN;
|
||||
return -1;
|
||||
}
|
||||
|
||||
int _execve(char *name, char **argv, char **env)
|
||||
{
|
||||
(void)name;
|
||||
(void)argv;
|
||||
(void)env;
|
||||
errno = ENOMEM;
|
||||
return -1;
|
||||
}
|
||||
79
Core/Src/System/sysmem.c
Normal file
79
Core/Src/System/sysmem.c
Normal file
@@ -0,0 +1,79 @@
|
||||
/**
|
||||
******************************************************************************
|
||||
* @file sysmem.c
|
||||
* @author Generated by STM32CubeIDE
|
||||
* @brief STM32CubeIDE System Memory calls file
|
||||
*
|
||||
* For more information about which C functions
|
||||
* need which of these lowlevel functions
|
||||
* please consult the newlib libc manual
|
||||
******************************************************************************
|
||||
* @attention
|
||||
*
|
||||
* Copyright (c) 2024 STMicroelectronics.
|
||||
* All rights reserved.
|
||||
*
|
||||
* This software is licensed under terms that can be found in the LICENSE file
|
||||
* in the root directory of this software component.
|
||||
* If no LICENSE file comes with this software, it is provided AS-IS.
|
||||
*
|
||||
******************************************************************************
|
||||
*/
|
||||
|
||||
/* Includes */
|
||||
#include <errno.h>
|
||||
#include <stdint.h>
|
||||
|
||||
/**
|
||||
* Pointer to the current high watermark of the heap usage
|
||||
*/
|
||||
static uint8_t *__sbrk_heap_end = NULL;
|
||||
|
||||
/**
|
||||
* @brief _sbrk() allocates memory to the newlib heap and is used by malloc
|
||||
* and others from the C library
|
||||
*
|
||||
* @verbatim
|
||||
* ############################################################################
|
||||
* # .data # .bss # newlib heap # MSP stack #
|
||||
* # # # # Reserved by _Min_Stack_Size #
|
||||
* ############################################################################
|
||||
* ^-- RAM start ^-- _end _estack, RAM end --^
|
||||
* @endverbatim
|
||||
*
|
||||
* This implementation starts allocating at the '_end' linker symbol
|
||||
* The '_Min_Stack_Size' linker symbol reserves a memory for the MSP stack
|
||||
* The implementation considers '_estack' linker symbol to be RAM end
|
||||
* NOTE: If the MSP stack, at any point during execution, grows larger than the
|
||||
* reserved size, please increase the '_Min_Stack_Size'.
|
||||
*
|
||||
* @param incr Memory size
|
||||
* @return Pointer to allocated memory
|
||||
*/
|
||||
void *_sbrk(ptrdiff_t incr)
|
||||
{
|
||||
extern uint8_t _end; /* Symbol defined in the linker script */
|
||||
extern uint8_t _estack; /* Symbol defined in the linker script */
|
||||
extern uint32_t _Min_Stack_Size; /* Symbol defined in the linker script */
|
||||
const uint32_t stack_limit = (uint32_t)&_estack - (uint32_t)&_Min_Stack_Size;
|
||||
const uint8_t *max_heap = (uint8_t *)stack_limit;
|
||||
uint8_t *prev_heap_end;
|
||||
|
||||
/* Initialize heap end at first call */
|
||||
if (NULL == __sbrk_heap_end)
|
||||
{
|
||||
__sbrk_heap_end = &_end;
|
||||
}
|
||||
|
||||
/* Protect heap from growing into the reserved MSP stack */
|
||||
if (__sbrk_heap_end + incr > max_heap)
|
||||
{
|
||||
errno = ENOMEM;
|
||||
return (void *)-1;
|
||||
}
|
||||
|
||||
prev_heap_end = __sbrk_heap_end;
|
||||
__sbrk_heap_end += incr;
|
||||
|
||||
return (void *)prev_heap_end;
|
||||
}
|
||||
249
Core/Src/System/system_stm32f0xx.c
Normal file
249
Core/Src/System/system_stm32f0xx.c
Normal file
@@ -0,0 +1,249 @@
|
||||
/**
|
||||
******************************************************************************
|
||||
* @file system_stm32f0xx.c
|
||||
* @author MCD Application Team
|
||||
* @brief CMSIS Cortex-M0 Device Peripheral Access Layer System Source File.
|
||||
*
|
||||
* 1. This file provides two functions and one global variable to be called from
|
||||
* user application:
|
||||
* - SystemInit(): This function is called at startup just after reset and
|
||||
* before branch to main program. This call is made inside
|
||||
* the "startup_stm32f0xx.s" file.
|
||||
*
|
||||
* - SystemCoreClock variable: Contains the core clock (HCLK), it can be used
|
||||
* by the user application to setup the SysTick
|
||||
* timer or configure other parameters.
|
||||
*
|
||||
* - SystemCoreClockUpdate(): Updates the variable SystemCoreClock and must
|
||||
* be called whenever the core clock is changed
|
||||
* during program execution.
|
||||
*
|
||||
*
|
||||
******************************************************************************
|
||||
* @attention
|
||||
*
|
||||
* Copyright (c) 2016 STMicroelectronics.
|
||||
* All rights reserved.
|
||||
*
|
||||
* This software is licensed under terms that can be found in the LICENSE file
|
||||
* in the root directory of this software component.
|
||||
* If no LICENSE file comes with this software, it is provided AS-IS.
|
||||
*
|
||||
******************************************************************************
|
||||
*/
|
||||
/** @addtogroup CMSIS
|
||||
* @{
|
||||
*/
|
||||
|
||||
/** @addtogroup stm32f0xx_system
|
||||
* @{
|
||||
*/
|
||||
|
||||
/** @addtogroup STM32F0xx_System_Private_Includes
|
||||
* @{
|
||||
*/
|
||||
|
||||
#include "stm32f0xx.h"
|
||||
|
||||
/**
|
||||
* @}
|
||||
*/
|
||||
|
||||
/** @addtogroup STM32F0xx_System_Private_TypesDefinitions
|
||||
* @{
|
||||
*/
|
||||
|
||||
/**
|
||||
* @}
|
||||
*/
|
||||
|
||||
/** @addtogroup STM32F0xx_System_Private_Defines
|
||||
* @{
|
||||
*/
|
||||
#if !defined (HSE_VALUE)
|
||||
#define HSE_VALUE ((uint32_t)8000000) /*!< Default value of the External oscillator in Hz.
|
||||
This value can be provided and adapted by the user application. */
|
||||
#endif /* HSE_VALUE */
|
||||
|
||||
#if !defined (HSI_VALUE)
|
||||
#define HSI_VALUE ((uint32_t)8000000) /*!< Default value of the Internal oscillator in Hz.
|
||||
This value can be provided and adapted by the user application. */
|
||||
#endif /* HSI_VALUE */
|
||||
|
||||
#if !defined (HSI48_VALUE)
|
||||
#define HSI48_VALUE ((uint32_t)48000000) /*!< Default value of the HSI48 Internal oscillator in Hz.
|
||||
This value can be provided and adapted by the user application. */
|
||||
#endif /* HSI48_VALUE */
|
||||
/**
|
||||
* @}
|
||||
*/
|
||||
|
||||
/** @addtogroup STM32F0xx_System_Private_Macros
|
||||
* @{
|
||||
*/
|
||||
|
||||
/**
|
||||
* @}
|
||||
*/
|
||||
|
||||
/** @addtogroup STM32F0xx_System_Private_Variables
|
||||
* @{
|
||||
*/
|
||||
/* This variable is updated in three ways:
|
||||
1) by calling CMSIS function SystemCoreClockUpdate()
|
||||
2) by calling HAL API function HAL_RCC_GetHCLKFreq()
|
||||
3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
|
||||
Note: If you use this function to configure the system clock; then there
|
||||
is no need to call the 2 first functions listed above, since SystemCoreClock
|
||||
variable is updated automatically.
|
||||
*/
|
||||
uint32_t SystemCoreClock = 8000000;
|
||||
|
||||
const uint8_t AHBPrescTable[16] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9};
|
||||
const uint8_t APBPrescTable[8] = {0, 0, 0, 0, 1, 2, 3, 4};
|
||||
|
||||
/**
|
||||
* @}
|
||||
*/
|
||||
|
||||
/** @addtogroup STM32F0xx_System_Private_FunctionPrototypes
|
||||
* @{
|
||||
*/
|
||||
|
||||
/**
|
||||
* @}
|
||||
*/
|
||||
|
||||
/** @addtogroup STM32F0xx_System_Private_Functions
|
||||
* @{
|
||||
*/
|
||||
|
||||
/**
|
||||
* @brief Setup the microcontroller system
|
||||
* @param None
|
||||
* @retval None
|
||||
*/
|
||||
void SystemInit(void)
|
||||
{
|
||||
/* NOTE :SystemInit(): This function is called at startup just after reset and
|
||||
before branch to main program. This call is made inside
|
||||
the "startup_stm32f0xx.s" file.
|
||||
User can setups the default system clock (System clock source, PLL Multiplier
|
||||
and Divider factors, AHB/APBx prescalers and Flash settings).
|
||||
*/
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Update SystemCoreClock variable according to Clock Register Values.
|
||||
* The SystemCoreClock variable contains the core clock (HCLK), it can
|
||||
* be used by the user application to setup the SysTick timer or configure
|
||||
* other parameters.
|
||||
*
|
||||
* @note Each time the core clock (HCLK) changes, this function must be called
|
||||
* to update SystemCoreClock variable value. Otherwise, any configuration
|
||||
* based on this variable will be incorrect.
|
||||
*
|
||||
* @note - The system frequency computed by this function is not the real
|
||||
* frequency in the chip. It is calculated based on the predefined
|
||||
* constant and the selected clock source:
|
||||
*
|
||||
* - If SYSCLK source is HSI, SystemCoreClock will contain the HSI_VALUE(*)
|
||||
*
|
||||
* - If SYSCLK source is HSE, SystemCoreClock will contain the HSE_VALUE(**)
|
||||
*
|
||||
* - If SYSCLK source is PLL, SystemCoreClock will contain the HSE_VALUE(**)
|
||||
* or HSI_VALUE(*) multiplied/divided by the PLL factors.
|
||||
*
|
||||
* - If SYSCLK source is HSI48, SystemCoreClock will contain the HSI48_VALUE(***)
|
||||
*
|
||||
* (*) HSI_VALUE is a constant defined in stm32f0xx_hal_conf.h file (default value
|
||||
* 8 MHz) but the real value may vary depending on the variations
|
||||
* in voltage and temperature.
|
||||
*
|
||||
* (**) HSE_VALUE is a constant defined in stm32f0xx_hal_conf.h file (its value
|
||||
* depends on the application requirements), user has to ensure that HSE_VALUE
|
||||
* is same as the real frequency of the crystal used. Otherwise, this function
|
||||
* may have wrong result.
|
||||
*
|
||||
* (***) HSI48_VALUE is a constant defined in stm32f0xx_hal_conf.h file (default value
|
||||
* 48 MHz) but the real value may vary depending on the variations
|
||||
* in voltage and temperature.
|
||||
*
|
||||
* - The result of this function could be not correct when using fractional
|
||||
* value for HSE crystal.
|
||||
*
|
||||
* @param None
|
||||
* @retval None
|
||||
*/
|
||||
void SystemCoreClockUpdate (void)
|
||||
{
|
||||
uint32_t tmp = 0, pllmull = 0, pllsource = 0, predivfactor = 0;
|
||||
|
||||
/* Get SYSCLK source -------------------------------------------------------*/
|
||||
tmp = RCC->CFGR & RCC_CFGR_SWS;
|
||||
|
||||
switch (tmp)
|
||||
{
|
||||
case RCC_CFGR_SWS_HSI: /* HSI used as system clock */
|
||||
SystemCoreClock = HSI_VALUE;
|
||||
break;
|
||||
case RCC_CFGR_SWS_HSE: /* HSE used as system clock */
|
||||
SystemCoreClock = HSE_VALUE;
|
||||
break;
|
||||
case RCC_CFGR_SWS_PLL: /* PLL used as system clock */
|
||||
/* Get PLL clock source and multiplication factor ----------------------*/
|
||||
pllmull = RCC->CFGR & RCC_CFGR_PLLMUL;
|
||||
pllsource = RCC->CFGR & RCC_CFGR_PLLSRC;
|
||||
pllmull = ( pllmull >> 18) + 2;
|
||||
predivfactor = (RCC->CFGR2 & RCC_CFGR2_PREDIV) + 1;
|
||||
|
||||
if (pllsource == RCC_CFGR_PLLSRC_HSE_PREDIV)
|
||||
{
|
||||
/* HSE used as PLL clock source : SystemCoreClock = HSE/PREDIV * PLLMUL */
|
||||
SystemCoreClock = (HSE_VALUE/predivfactor) * pllmull;
|
||||
}
|
||||
#if defined(STM32F042x6) || defined(STM32F048xx) || defined(STM32F071xB) || defined(STM32F072xB) || defined(STM32F078xx) || defined(STM32F091xC) || defined(STM32F098xx)
|
||||
else if (pllsource == RCC_CFGR_PLLSRC_HSI48_PREDIV)
|
||||
{
|
||||
/* HSI48 used as PLL clock source : SystemCoreClock = HSI48/PREDIV * PLLMUL */
|
||||
SystemCoreClock = (HSI48_VALUE/predivfactor) * pllmull;
|
||||
}
|
||||
#endif /* STM32F042x6 || STM32F048xx || STM32F071xB || STM32F072xB || STM32F078xx || STM32F091xC || STM32F098xx */
|
||||
else
|
||||
{
|
||||
#if defined(STM32F042x6) || defined(STM32F048xx) || defined(STM32F070x6) \
|
||||
|| defined(STM32F078xx) || defined(STM32F071xB) || defined(STM32F072xB) \
|
||||
|| defined(STM32F070xB) || defined(STM32F091xC) || defined(STM32F098xx) || defined(STM32F030xC)
|
||||
/* HSI used as PLL clock source : SystemCoreClock = HSI/PREDIV * PLLMUL */
|
||||
SystemCoreClock = (HSI_VALUE/predivfactor) * pllmull;
|
||||
#else
|
||||
/* HSI used as PLL clock source : SystemCoreClock = HSI/2 * PLLMUL */
|
||||
SystemCoreClock = (HSI_VALUE >> 1) * pllmull;
|
||||
#endif /* STM32F042x6 || STM32F048xx || STM32F070x6 ||
|
||||
STM32F071xB || STM32F072xB || STM32F078xx || STM32F070xB ||
|
||||
STM32F091xC || STM32F098xx || STM32F030xC */
|
||||
}
|
||||
break;
|
||||
default: /* HSI used as system clock */
|
||||
SystemCoreClock = HSI_VALUE;
|
||||
break;
|
||||
}
|
||||
/* Compute HCLK clock frequency ----------------*/
|
||||
/* Get HCLK prescaler */
|
||||
tmp = AHBPrescTable[((RCC->CFGR & RCC_CFGR_HPRE) >> 4)];
|
||||
/* HCLK clock frequency */
|
||||
SystemCoreClock >>= tmp;
|
||||
}
|
||||
|
||||
/**
|
||||
* @}
|
||||
*/
|
||||
|
||||
/**
|
||||
* @}
|
||||
*/
|
||||
|
||||
/**
|
||||
* @}
|
||||
*/
|
||||
|
||||
59
Core/Src/main.cpp
Normal file
59
Core/Src/main.cpp
Normal file
@@ -0,0 +1,59 @@
|
||||
#include "stm32f0xx.h" // Or your device header
|
||||
|
||||
volatile int prev_button = false;
|
||||
volatile int curr_button = false;
|
||||
|
||||
extern "C" void TIM2_IRQHandler(void){
|
||||
if(TIM2->SR & TIM_SR_UIF){
|
||||
TIM2->SR &= ~TIM_SR_UIF;
|
||||
GPIOA->ODR ^= (1 << 5);
|
||||
}
|
||||
}
|
||||
|
||||
extern "C" void EXTI0_1_IRQHandler(void) {
|
||||
if (EXTI->PR & (1 << 0)) { //Check pending flag
|
||||
EXTI->PR |= (1 << 0); //Clear it by writing 1
|
||||
GPIOA->ODR ^= (1 << 4);
|
||||
}
|
||||
}
|
||||
|
||||
int main() {
|
||||
RCC->AHBENR |= RCC_AHBENR_GPIOAEN;
|
||||
RCC->AHBENR |= RCC_AHBENR_GPIOBEN;
|
||||
RCC->APB1ENR |= RCC_APB1ENR_TIM2EN;
|
||||
RCC->APB2ENR |= RCC_APB2ENR_SYSCFGEN; // Enable SYSCFG clock (needed for EXTI)
|
||||
|
||||
TIM2->EGR |= TIM_EGR_UG; //Force update to load PSC/ARR
|
||||
|
||||
GPIOA->MODER &= ~(0b11 << (4 * 2));
|
||||
GPIOA->MODER |= (0b1 << (4 * 2));
|
||||
|
||||
GPIOA->MODER &= ~(0x3 << (5 * 2));
|
||||
GPIOA->MODER |= (0x1 << (5 * 2));
|
||||
|
||||
GPIOB->MODER &= ~(0x3 << (0 * 2));
|
||||
GPIOB->MODER |= (0x0 << (0 * 2));
|
||||
|
||||
TIM2->PSC = 8000 - 1; //8MHz base, prescaler
|
||||
TIM2->ARR = 500 - 1; //500ms, auto reload register
|
||||
|
||||
SYSCFG->EXTICR[0] &= ~SYSCFG_EXTICR1_EXTI0; // Clear EXTI0 mapping
|
||||
SYSCFG->EXTICR[0] |= SYSCFG_EXTICR1_EXTI0_PB; // Map PA0 -> EXTI0
|
||||
|
||||
EXTI->IMR |= (1 << 0); // Unmask EXTI0
|
||||
EXTI->RTSR |= (1 << 0); // Trigger on rising edge
|
||||
|
||||
|
||||
TIM2->DIER |= TIM_DIER_UIE; //Interrupt register
|
||||
TIM2->CR1 |= TIM_CR1_CEN; //Counter enable
|
||||
|
||||
|
||||
NVIC_EnableIRQ(TIM2_IRQn);
|
||||
NVIC_EnableIRQ(EXTI0_1_IRQn); // EXTI lines 0 and 1 share an IRQ vector
|
||||
|
||||
__enable_irq();
|
||||
|
||||
while (1) {
|
||||
__WFI();
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user