#include "stm32c0xx_hal.h"
#include <stdio.h>
#include <string.h>
#define _OPEN_SYS_ITOA_EXT
#define BUTTON1_PIN GPIO_PIN_0 // Change to the desired pin for button 1
#define BUTTON1_PORT GPIOA // Change to the desired port for button 1
#define BUTTON2_PIN GPIO_PIN_1 // Change to the desired pin for button 2
#define BUTTON2_PORT GPIOA // Change to the desired port for button 2
#define B1_Pin GPIO_PIN_13
#define B1_GPIO_Port GPIOC
#define B1_EXTI_IRQn EXTI15_10_IRQn
#define USART_TX_Pin GPIO_PIN_2
#define USART_TX_GPIO_Port GPIOA
#define USART_RX_Pin GPIO_PIN_3
#define USART_RX_GPIO_Port GPIOA
#define LD2_Pin GPIO_PIN_5
#define LD2_GPIO_Port GPIOA
#define TMS_Pin GPIO_PIN_13
#define TMS_GPIO_Port GPIOA
#define TCK_Pin GPIO_PIN_14
#define TCK_GPIO_Port GPIOA
#define SWO_Pin GPIO_PIN_3
#define SWO_GPIO_Port GPIOB
volatile uint32_t overflowCount = 0;
char * utoa(unsigned int n, char * buffer, int radix);
TIM_HandleTypeDef htim3;
UART_HandleTypeDef huart2;
int ButtonCounter = 0;
uint32_t overflow1 = 0;
uint32_t overflow2 = 0;
uint32_t elapsedSeconds = 0;
int radi = 10;
char elapsedStr[100];
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_USART2_UART_Init(void);
static void MX_TIM3_Init(void);
void EXTI0_IRQHandler(void);
void EXTI1_IRQHandler(void);
void EXTI0_IRQHandler(void) {
HAL_GPIO_EXTI_IRQHandler(BUTTON1_PIN);
}
void EXTI1_IRQHandler(void)
{
HAL_GPIO_EXTI_IRQHandler(BUTTON2_PIN);
}
void TIM3_IRQHandler(void) {
if (__HAL_TIM_GET_FLAG(&htim3, TIM_FLAG_UPDATE)) {
if (__HAL_TIM_GET_IT_SOURCE(&htim3, TIM_IT_UPDATE)) {
// Clear the update event flag manually
__HAL_TIM_CLEAR_IT(&htim3, TIM_IT_UPDATE);
// Increment the overflow counter
overflowCount++;
}
}
}
void HAL_GPIO_EXTI_IRQHandler(uint16_t GPIO_Pin)
{
/* EXTI line interrupt detected */
if(__HAL_GPIO_EXTI_GET_IT(GPIO_Pin) != RESET)
{
__HAL_GPIO_EXTI_CLEAR_IT(GPIO_Pin);
HAL_GPIO_EXTI_Callback(GPIO_Pin);
}
}
int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_USART2_UART_Init();
MX_TIM3_Init();
HAL_TIM_Base_Start_IT(&htim3);
while (1)
{
}
}
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/** Configure the main internal regulator output voltage
*/
__HAL_RCC_PWR_CLK_ENABLE();
/** Initializes the RCC Oscillators according to the specified parameters
* in the RCC_OscInitTypeDef structure.
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSIDiv = RCC_HSI_DIV1;
RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Initializes the CPU, AHB and APB buses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
| RCC_CLOCKTYPE_PCLK1;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
RCC_ClkInitStruct.SYSCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.AHBCLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_APB1_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)
{
Error_Handler();
}
}
/**
* @brief TIM3 Initialization Function
* @param None
* @retval None
*/
static void MX_TIM3_Init(void)
{
/* USER CODE BEGIN TIM3_Init 0 */
/* USER CODE END TIM3_Init 0 */
TIM_ClockConfigTypeDef sClockSourceConfig = {0};
TIM_MasterConfigTypeDef sMasterConfig = {0};
/* USER CODE BEGIN TIM3_Init 1 */
/* USER CODE END TIM3_Init 1 */
htim3.Instance = TIM3;
htim3.Init.Prescaler = 7199;
htim3.Init.CounterMode = TIM_COUNTERMODE_UP;
htim3.Init.Period = 9999;
htim3.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
htim3.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
if (HAL_TIM_Base_Init(&htim3) != HAL_OK)
{
Error_Handler();
}
sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
if (HAL_TIM_ConfigClockSource(&htim3, &sClockSourceConfig) != HAL_OK)
{
Error_Handler();
}
sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
if (HAL_TIMEx_MasterConfigSynchronization(&htim3, &sMasterConfig) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN TIM3_Init 2 */
HAL_NVIC_SetPriority(TIM3_IRQn, 0, 0); // Set the priority to your desired level
HAL_NVIC_EnableIRQ(TIM3_IRQn); // Enable the timer interrupt
__HAL_TIM_ENABLE_IT(&htim3, TIM_IT_UPDATE);
/* USER CODE END TIM3_Init 2 */
}
/**
* @brief USART2 Initialization Function
* @param None
* @retval None
*/
static void MX_USART2_UART_Init(void)
{
/* USER CODE BEGIN USART2_Init 0 */
/* USER CODE END USART2_Init 0 */
/* USER CODE BEGIN USART2_Init 1 */
/* USER CODE END USART2_Init 1 */
huart2.Instance = USART2;
huart2.Init.BaudRate = 115200;
huart2.Init.WordLength = UART_WORDLENGTH_8B;
huart2.Init.StopBits = UART_STOPBITS_1;
huart2.Init.Parity = UART_PARITY_NONE;
huart2.Init.Mode = UART_MODE_TX_RX;
huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart2.Init.OverSampling = UART_OVERSAMPLING_16;
if (HAL_UART_Init(&huart2) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN USART2_Init 2 */
/* USER CODE END USART2_Init 2 */
}
/**
* @brief GPIO Initialization Function
* @param None
* @retval None
*/
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
/* USER CODE BEGIN MX_GPIO_Init_1 */
/* USER CODE END MX_GPIO_Init_1 */
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOC_CLK_ENABLE();
__HAL_RCC_GPIOH_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(LD2_GPIO_Port, LD2_Pin, GPIO_PIN_RESET);
/*Configure GPIO pin : B1_Pin */
GPIO_InitStruct.Pin = B1_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_IT_FALLING;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(B1_GPIO_Port, &GPIO_InitStruct);
/*Configure GPIO pin : LD2_Pin */
GPIO_InitStruct.Pin = LD2_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(LD2_GPIO_Port, &GPIO_InitStruct);
/* EXTI interrupt init*/
/* USER CODE BEGIN MX_GPIO_Init_2 */
GPIO_InitStruct.Pin = BUTTON1_PIN | BUTTON2_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_IT_FALLING;
GPIO_InitStruct.Pull = GPIO_PULLUP;
HAL_GPIO_Init(BUTTON1_PORT, &GPIO_InitStruct);
HAL_NVIC_SetPriority(EXTI0_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(EXTI0_IRQn);
HAL_NVIC_SetPriority(EXTI1_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(EXTI1_IRQn);
/* USER CODE END MX_GPIO_Init_2 */
}
/* USER CODE BEGIN 4 */
void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin){
if(GPIO_Pin == BUTTON1_PIN){
HAL_GPIO_TogglePin (GPIOA,GPIO_PIN_5);
if(ButtonCounter == 0){
overflow1 = overflowCount;
ButtonCounter=1;
}
else{
overflow2 = overflowCount;
elapsedSeconds = overflow2 - overflow1;
utoa( (unsigned) elapsedSeconds, elapsedStr, radi );
HAL_UART_Transmit(&huart2, (const uint8_t*)elapsedStr, strlen(elapsedStr), 100);
overflow1 = overflowCount;
}
}
else{
HAL_GPIO_TogglePin (GPIOA,GPIO_PIN_5);
if(ButtonCounter == 0){
overflow1 = overflowCount;
ButtonCounter=1;
}
else{
overflow2 = overflowCount;
elapsedSeconds = overflow2 - overflow1;
utoa( (unsigned) elapsedSeconds, elapsedStr, radi );
HAL_UART_Transmit(&huart2, (const uint8_t*)elapsedStr, strlen(elapsedStr), 100);
overflow1 = overflowCount;
}
}
}
void Error_Handler(void)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* User can add his own implementation to report the HAL error return state */
__disable_irq();
while (1)
{
}
/* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t *file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */