Stm32 to Python

Hello MFara.4 (Community Member)

You are looking for code examples for transferring from STM32 to Python by serial, do you mean by a UART device of the STM32 or other like USB, SPI or I2C ? 

Is the code you are looking for is in C/C++ language? 

Have you looked in the HAL library of the device you are using for examples related to USART transfer?

Can you be more precise in your question?

Best regards,

Romain,

Thanks for the reply!

Yes I need examples which are related to USAERT transfer.

one more question! I use this code to get the data ADC and transmit it but I can't see my data on Tera Term, I see my data in live Expression but not in Tera Term so most probably problem comes from Transmit part!! I would be happy if you take a look at the code that which part might be wrong.(STMG01291)

ADC1 - IN9 (tick)

Parameter Settings --> ADC Settings --> Continuous Conversion Mode (Enabled)

Enable USART1 asynchronous

Parameter Settings --> Basic Parameters --> Baud rate 9600

void SystemClock_Config(void);

static void MX_GPIO_Init(void);

static void MX_ADC1_Init(void);

static void MX_USART1_UART_Init(void);

/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/

/* USER CODE BEGIN 0 */

uint16_t readValue;

char string[10];

/* 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 */

 /* 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_ADC1_Init();

 MX_USART1_UART_Init();

 /* USER CODE BEGIN 2 */

 HAL_ADC_Start(&hadc1);

 /* USER CODE END 2 */

 /* Infinite loop */

 /* USER CODE BEGIN WHILE */

 while (1)

 {

 HAL_ADC_PollForConversion(&hadc1,1000);

 readValue = HAL_ADC_GetValue(&hadc1);

 HAL_UART_Transmit(&huart1, (uint8_t *)&readValue, sizeof(readValue), 100);

Hi MFara.4 (Community Member)

You must convert your variable readValue in Ascii Char to display it in any terminal.

Before transmit it with HAL_UART_Transmit.

As an example below:

Best regards

#include <stdio.h> // for sprintf usage
static char adc_buf[16] = {0};
static uint32_t adc_len = 0;
 
/* Convert in array of ASCII char and compute array lenght */
adc_len = sprintf(adc_buf, "ADC Value=%d/r/n", readValue);
 
/* Transmit Array */
if (HAL_UART_Transmit(&huart1, (uint8_t *)adc_buf, adc_len, HAL_MAX_DELAY) != HAL_OK)
{
 Error_Handler();
}

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On the Python side, something along the lines of

import serial
 
s = serial.Serial('COM23', baudrate=115200) # Open serial port
 
 while (s.in_waiting != 0):
 data = s.readline().decode('ascii', errors='replace')
 
# process / convert 'data' into variables