Question
STM32G071G8U6TR trying to use I2C communication
I'm trying to use the I2C line of an STM32G071G8U6TR to talk with an external device. I've used the STMCube to configure the pins to be I2C with pull ups and high speed which created this Init
static void MX_I2C1_Init(void)
{
/* USER CODE BEGIN I2C1_Init 0 */
/* USER CODE END I2C1_Init 0 */
/* USER CODE BEGIN I2C1_Init 1 */
//hi2c1.Init.Timing = I2C_SPEEDCLOCK;
//hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_10BIT;
//hi2c1.Init.OwnAddress2 = 0xff;
/* USER CODE END I2C1_Init 1 */
hi2c1.Instance = I2C1;
hi2c1.Init.Timing = 0x00503D58;
hi2c1.Init.OwnAddress1 = 0;
hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
hi2c1.Init.OwnAddress2 = 0;
hi2c1.Init.OwnAddress2Masks = I2C_OA2_NOMASK;
hi2c1.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
hi2c1.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
if (HAL_I2C_Init(&hi2c1) != HAL_OK)
{
Error_Handler();
}
/** Configure Analogue filter
*/
if (HAL_I2CEx_ConfigAnalogFilter(&hi2c1, I2C_ANALOGFILTER_ENABLE) != HAL_OK)
{
Error_Handler();
}
/** Configure Digital filter
*/
if (HAL_I2CEx_ConfigDigitalFilter(&hi2c1, 0) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN I2C1_Init 2 */
if(HAL_I2C_Init(&hi2c1) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* USER CODE END I2C1_Init 2 */
}
However when I try and use this code to send commands to the device the status return is always returned as HAL_I2C_STATE_RESET, I've used a scope to check both the I2C lines and they are both high when this code is called.
void connect_vane()
{
//status = HAL_I2C_Master_Transmit_IT(&I2cHandle, MOTOR_ADDRESS_WRITE, (uint8_t*)aTxBuffer, TXBUFFERSIZE);
//if (HAL_OK == status)
//{
//bytes_written = bytes_to_write;
//connect_vane();
//message_buf[0] = 0x66; //Address 66
/*message_buf[0] = 0x3C; // '<'
message_buf[1] = 0x30; // '0'
message_buf[2] = 0x31; // '1'
message_buf[3] = 0x3E; // '>'
message_buf[4] = 0x0D; // '/r'*/
//HAL_I2C_Master_Transmit(&hi2c1, MOTOR_ADDRESS_WRITE, message_buf, 5, 1000);
aTxBuffer[0] = 0x66;
aTxBuffer[1] = 0x3C; // '<'
aTxBuffer[2] = 0x30; // '0'
aTxBuffer[3] = 0x31; // '1'
aTxBuffer[4] = 0x3E; // '>'
aTxBuffer[5] = 0x0D; // '/r'
do
{
if(HAL_I2C_Master_Transmit(&I2cHandle, MOTOR_ADDRESS_WRITE, (uint8_t*)aTxBuffer, TXBUFFERSIZE, 1000)!= HAL_OK)
{
/* Error_Handler() function is called when error occurs. */
Error_Handler();
}
/*##-3- Wait for the end of the transfer #################################*/
/* Before starting a new communication transfer, you need to check the current
state of the peripheral; if it�s busy you need to wait for the end of current
transfer before starting a new one.
For simplicity reasons, this example is just waiting till the end of the
transfer, but application may perform other tasks while transfer operation
is ongoing. */
while (HAL_I2C_GetState(&I2cHandle) != HAL_I2C_STATE_READY)
{
}
/* When Acknowledge failure occurs (Slave don't acknowledge it's address)
Master restarts communication */
}
while(HAL_I2C_GetError(&I2cHandle) == HAL_I2C_ERROR_AF);
HAL_Delay(50);
do
{
if(HAL_I2C_Master_Receive(&I2cHandle, (uint16_t)MOTOR_ADDRESS_WRITE, (uint8_t *)aRxBuffer, RXBUFFERSIZE, 1000) != HAL_OK)
{
/* Error_Handler() function is called when error occurs. */
Error_Handler();
}
/*##-5- Wait for the end of the transfer #################################*/
/* Before starting a new communication transfer, you need to check the current
state of the peripheral; if it�s busy you need to wait for the end of current
transfer before starting a new one.
For simplicity reasons, this example is just waiting till the end of the
transfer, but application may perform other tasks while transfer operation
is ongoing. */
while (HAL_I2C_GetState(&I2cHandle) != HAL_I2C_STATE_READY)
{
}
/* When Acknowledge failure occurs (Slave don't acknowledge it's address)
Master restarts communication */
}
while(HAL_I2C_GetError(&I2cHandle) == HAL_I2C_ERROR_AF);
}