Connecting two nucleo boards using I2C.
Hello, I just started using the Nucleo board and currently I am trying to connect two Nucleo G071RB by using I2C, using one as a Master and another one as a Slave.
I, however, am not able to even get a clock signal coming from the Master (measured using a logic analyzer) and I am not sure why as I'm pretty sure I have set the Pins right in MX. I try using the HAL_I2C_IsDeviceReady function, before the loop, but that already returns a HAL_ERROR as expected.
My code for the Master board can be seen below, if anyone has any tips or ideas please let me know.
int main(void)
{
uint8_t buffer[3];
HAL_StatusTypeDef ret;
HAL_Init();
/* Configure the system clock */
SystemClock_Config();
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_I2C1_Init();
MX_USART2_UART_Init();
HAL_I2C_MspInit(&hi2c1);
ret = HAL_I2C_IsDeviceReady(&hi2c1, (peripheralNucleoAddress << 1), 3, 5000);
if (ret != HAL_OK)
{
uint8_t message[27];
strcpy((char*) message, "Connection to board lost\n");
HAL_UART_Transmit(&huart2, message, strlen((char*) message), 5000);
//Error_Handler();
}
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
ret = HAL_I2C_Master_Transmit(&hi2c1, peripheralNucleoAddress << 1, buffer, 1, 10000);
if (ret != HAL_OK)
{
strcpy((char*) buffer, "Tx");
HAL_UART_Transmit(&huart2, buffer, strlen((char*) buffer), 1000);
//Error_Handler();
}
ret = HAL_I2C_Master_Receive(&hi2c1, peripheralNucleoAddress << 1 | 1, buffer, 2, 1000);
if (ret != HAL_OK)
{
strcpy((char*) buffer, "Rx");
HAL_UART_Transmit(&huart2, buffer, strlen((char*) buffer), 1000);
//Error_Handler();
}
if (buffer[1] == 0xFF || buffer[1] == 0x01)
{
uint8_t message[9];
strcpy((char*) message, "Success!");
HAL_UART_Transmit(&huart2, message, strlen((char*) message), 1000);
}
}
}
