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stm32 HAL I2C Problem
I am using a Nucleos f103rb board and want to programm a simple i2c communication with a 0.91 oled i2c display. In order to see some data from the i2c I connected my oszi to sda and scl. But when I run my program I only see a permament 3.3V voltage on both pins. I have tried to get the fault, so I looked up what the state of HAL_I2C_Master_Transmit is and it is always busy. I have set the right pins of I2C in MXCube, and enable I2C, so what I am doing wrong? Thanks for answering.
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Here is my main code:
int main(void)
{
/* USER CODE BEGIN 1 */
HAL_StatusTypeDef ret;
uint16_t address = 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_I2C1_Init();
MX_USART2_UART_Init();
/* USER CODE BEGIN 2 */
HAL_UART_Transmit(&huart2, (uint8_t*)("\ronline\n\r\n"), strlen("\ronline\n\r\n"), HAL_MAX_DELAY);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
ret = HAL_I2C_Master_Transmit(&hi2c1, address, (uint8_t*)0xE3, 1, HAL_MAX_DELAY);
if ( ret == HAL_ERROR )
{
HAL_UART_Transmit(&huart2, (uint8_t*)("\rError\n"), strlen("\rError\n"), HAL_MAX_DELAY);
address++;
} else if(ret == HAL_BUSY)
{
HAL_UART_Transmit(&huart2, (uint8_t*)("\rBusy\n"), strlen("\rBusy\n"), HAL_MAX_DELAY);
}
else
{
HAL_UART_Transmit(&huart2, (uint8_t*)("\rFound\n"), strlen("\rFound\n"), HAL_MAX_DELAY);
}
}
/* USER CODE END 3 */
}