Question
I2C conflict with timer output
hello to everyone,
i am using stm32f429zi to generate a pulse for a triac . It all function without a lcd display.
when i write the code to init the display(via I2C) ,,, the display works very fine but i have a problem ... the output of timer1 doesnt show a pulse but a 3.3V and it is not good for my application.
/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file : main.c
* @brief : Main program body
******************************************************************************
* @attention
*
* Copyright (c) 2022 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.
*
******************************************************************************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "i2c-lcd.h"
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
I2C_HandleTypeDef hi2c2;
TIM_HandleTypeDef htim1;
/* USER CODE BEGIN PV */
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_I2C2_Init(void);
static void MX_TIM1_Init(void);
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
#define TRIAC_PULSE_WIDTH 100 // Duration of TRIAC trigger pulse in µs
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
int alpha =500;
set_alpha( alpha ); // Generate alpha on output
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_I2C2_Init();
MX_TIM1_Init();
/* USER CODE BEGIN 2 */
lcd_init ();
lcd_send_cmd (0x80|0x00);
lcd_send_string(" POWER TECHNOLOGIES");
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}
/**
* @brief System Clock Configuration
* @retval None
*/
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();
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE3);
/** 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.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
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_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
{
Error_Handler();
}
}
/**
* @brief I2C2 Initialization Function
* @param None
* @retval None
*/
void set_alpha( int alpha )
{
TIM1->CCR1 = alpha;
TIM1->ARR = alpha + TRIAC_PULSE_WIDTH;
}
void MX_I2C2_Init(void)
{
/* USER CODE BEGIN I2C2_Init 0 */
/* USER CODE END I2C2_Init 0 */
/* USER CODE BEGIN I2C2_Init 1 */
/* USER CODE END I2C2_Init 1 */
hi2c2.Instance = I2C2;
hi2c2.Init.ClockSpeed = 100000;
hi2c2.Init.DutyCycle = I2C_DUTYCYCLE_2;
hi2c2.Init.OwnAddress1 = 0;
hi2c2.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
hi2c2.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
hi2c2.Init.OwnAddress2 = 0;
hi2c2.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
hi2c2.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
if (HAL_I2C_Init(&hi2c2) != HAL_OK)
{
Error_Handler();
}
/** Configure Analogue filter
*/
if (HAL_I2CEx_ConfigAnalogFilter(&hi2c2, I2C_ANALOGFILTER_ENABLE) != HAL_OK)
{
Error_Handler();
}
/** Configure Digital filter
*/
if (HAL_I2CEx_ConfigDigitalFilter(&hi2c2, 0) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN I2C2_Init 2 */
/* USER CODE END I2C2_Init 2 */
}
/**
* @brief TIM1 Initialization Function
* @param None
* @retval None
*/
void MX_TIM1_Init(void)
{
/* USER CODE BEGIN TIM1_Init 0 */
{
__HAL_RCC_TIM1_CLK_ENABLE(); // Enable Timer 1 clock
TIM1->CR1 = 0x0088; // Auto-reload, One-Pulse-Mode
TIM1->CR2 = 0x0000; // Idle-state configuration
TIM1->SMCR = 0x0066; // Trigger-Mode, Timer input 2
TIM1->DIER = 0x0000; // Disable interrupts
TIM1->SR = 0x0000; // Clear status register
TIM1->EGR = 0x0000; // Clear event generation register
TIM1->CCMR1 = 0x0178; // OC1: PWM2-Mode, Preload, IC2: IC2 on TI2
TIM1->CCMR2 = 0x0000; // OC3/OC4, IC3/IC4 off
TIM1->CCER = 0x00A1; // OC1: On, AH; IC2: On, Both edges
TIM1->CNT = 0; // Clear timer 1 counter
TIM1->PSC = 168-1; // Set prescaler to 168
TIM1->ARR = 0x0000; // Initialize Auto-reload register
TIM1->RCR = 0x0000; // Clear repetition counter
TIM1->CCR1 = 0x0000; // Initialize Capture/Compare register 1
TIM1->CCR2 = 0x0000; // Clear Capture/Compare register 2
TIM1->CCR3 = 0x0000; // Clear Capture/Compare register 3
TIM1->CCR4 = 0x0000; // Clear Capture/Compare register 4
TIM1->BDTR = 0x8000; // Main output enable
TIM1->DCR = 0x0000; // Clear DMA configuration (DMA not needed)
TIM1->CR1 |= 0x0001; // Timer 1 Enable
}
/* USER CODE END TIM1_Init 0 */
/* USER CODE BEGIN TIM1_Init 2 */
/* USER CODE END TIM1_Init 2 */
}
/**
* @brief GPIO Initialization Function
* @param None
* @retval None
*/
void MX_GPIO_Init(void)
{
{
__HAL_RCC_GPIOE_CLK_ENABLE(); // Enable GPIOE clock
GPIOE->MODER = 0x00880000; // Enable PE9/PE11 alternate function mode
GPIOE->AFR[1] = 0x00001010; // Select PE9/PE11 alternate function AF1
GPIOE->AFR[0] = 0x00000000; // Clear AFRL
GPIOE->OTYPER = 0x00000000; // Set all outputs to push-pull mode (default)
GPIOE->OSPEEDR = 0x00000000; // Set all outputs to low-speed (default)
GPIOE->PUPDR = 0x00000000; // Disable all pull-ups and pull-downs
}
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOF_CLK_ENABLE();
__HAL_RCC_GPIOH_CLK_ENABLE();
__HAL_RCC_GPIOE_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
}
/* USER CODE BEGIN 4 */
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error occurrence.
* @retval None
*/
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 */