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Jun 12, 2020 11:41 AM UTC
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stm 32F4 Virtual comport won't work
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Hello,
i am trying to use the virtual comport of the stm32f407vgt6 to communicate with my win 10 pc. I want to send 16 bytes of data.
I created a base project in cubeMX and insert the cdc_transmit. There it is possible to send 16 bytes of data via the virtual comport to my pc. I can see the incoming datas in hterm.
My Problem is, that it's impossible to access the COM port via hterm or labview, when i add some lines of code, e.g. set up an ADC. If the send buffer is bigger then 19 bytes i got the same problem.
The following program isn't working.
/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file : main.c
* @brief : Main program body
******************************************************************************
* @attention
*
* <h2><center>© Copyright (c) 2020 STMicroelectronics.
* All rights reserved.</center></h2>
*
* This software component is licensed by ST under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "adc.h"
#include "dma.h"
#include "i2c.h"
#include "i2s.h"
#include "spi.h"
#include "tim.h"
#include "usb_device.h"
#include "gpio.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
#define TX_BUF_SIZE 16
#define adcSequenz 8
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
uint16_t DeviceAdress= 0x20 << 1;
volatile uint8_t Tx_Flag;
uint32_t ms_cnt = 0;
uint8_t txbuff[TX_BUF_SIZE];
uint32_t cycCnt = 0;
uint16_t adc1Data[adcSequenz];
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */
extern uint8_t CDC_Transmit_FS(uint8_t* Buf, uint16_t len);
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
/**
* @brief Period elapsed callback in non blocking mode
* @param htim: TIM handle
* @retval None
*/
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
uint8_t i;
for(i=0; i<TX_BUF_SIZE; i++)
{
txbuff[i] = cycCnt; // AD Wandler simuliert
}
// Start ADC DMA
if (htim->Instance == htim14.Instance)
{
HAL_ADC_Start(&hadc1);
HAL_ADC_Start_DMA(&hadc1, (uint32_t*) adc1Data, adcSequenz);
/* Toggle LED */
//HAL_GPIO_TogglePin(GPIOD, LD4_Pin);
ms_cnt++;
if(ms_cnt >= 500)
{
Tx_Flag = 1;
ms_cnt = 0;
}
}
}
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
HAL_StatusTypeDef stat = 0;
uint8_t adcTxBuffer[16];
uint8_t adcRxBuffer[16];
uint8_t datatx[2];
uint8_t datarx[1];
datarx[0]=0x00;
/* 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_DMA_Init();
MX_I2C1_Init();
MX_I2S3_Init();
MX_SPI1_Init();
MX_USB_DEVICE_Init();
MX_ADC1_Init();
MX_TIM14_Init();
/* USER CODE BEGIN 2 */
float show[adcSequenz];
int i = 0;
//int j = 0;
adcTxBuffer[0] = 0x00;
adcTxBuffer[1] = 0xF8;
stat = HAL_I2C_Mem_Write(&hi2c1, DeviceAdress, 0x02, 2, adcTxBuffer, 2, 100);
stat = HAL_I2C_Mem_Read(&hi2c1, DeviceAdress, 0x02, 2, adcRxBuffer, 2, 100);
HAL_Delay(1);
HAL_GPIO_TogglePin(GPIOA, 1);
HAL_Delay(1);
HAL_GPIO_TogglePin(GPIOA, 1);
//stat = HAL_I2C_Mem_Read(&hi2c1, DeviceAdress, 0x00, 2, adcRxBuffer, 2, 100);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
for(i=0; i<adcSequenz; i++)
{
show[i] = (float) adc1Data[i]*(float) 3.3 / (float)0xFFF;
}
if(Tx_Flag == 1)
{
// for(j = 0; j < 8; j++)
// {
// txbuff[2*j+1] = adc1Data[j] & 0x00FF;
// txbuff[2*j] = (adc1Data[j] & 0xFF00) >> 8;
// }
cycCnt++;
Tx_Flag = 0;
CDC_Transmit_FS(txbuff, sizeof(txbuff));
HAL_GPIO_TogglePin(GPIOD, LD4_Pin);
}
/* 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};
RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0};
/** Configure the main internal regulator output voltage
*/
__HAL_RCC_PWR_CLK_ENABLE();
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
/** Initializes the CPU, AHB and APB busses clocks
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLM = 8;
RCC_OscInitStruct.PLL.PLLN = 336;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLQ = 7;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Initializes the CPU, AHB and APB busses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK)
{
Error_Handler();
}
PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_I2S;
PeriphClkInitStruct.PLLI2S.PLLI2SN = 192;
PeriphClkInitStruct.PLLI2S.PLLI2SR = 2;
if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
{
Error_Handler();
}
}
/* 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 */
/* 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,
tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
I attached a working example. So i have no idea where the mistake can be.
