Hi!
Problem:
I found a bug when I enabling the ETH perpherial in the STM32F407 processor. The error is a DMA bus error.
What's happening:
It occurs when the ethernet PHY recieve a message from my router.
How to produce the error:
I do the following steps to reproduce the error.
- I start up my PCB board
- I let the initialization do its job and I get no error back.
- I plugin my ethernet cable
- I ping a random device with a random number
Then this call back function HAL_ETH_ErrorCallback(ETH_HandleTypeDef *heth); will be called.
/** @defgroup ETH_Error_Code ETH Error Code
* @{
*/
#define HAL_ETH_ERROR_NONE ((uint32_t)0x00000000U) /*!< No error */
#define HAL_ETH_ERROR_PARAM ((uint32_t)0x00000001U) /*!< Busy error */
#define HAL_ETH_ERROR_BUSY ((uint32_t)0x00000002U) /*!< Parameter error */
#define HAL_ETH_ERROR_TIMEOUT ((uint32_t)0x00000004U) /*!< Timeout error */
#define HAL_ETH_ERROR_DMA ((uint32_t)0x00000008U) /*!< DMA transfer error */
#define HAL_ETH_ERROR_MAC ((uint32_t)0x00000010U) /*!< MAC transfer error */
#if (USE_HAL_ETH_REGISTER_CALLBACKS == 1)
#define HAL_ETH_ERROR_INVALID_CALLBACK ((uint32_t)0x00000020U) /*!< Invalid Callback error */
#endif /* USE_HAL_ETH_REGISTER_CALLBACKS */
/**
* @}
*/The DMA error is a DMA bus error.
/* ETH DMA Error */
if (__HAL_ETH_DMA_GET_IT(heth, ETH_DMASR_AIS))
{
if (__HAL_ETH_DMA_GET_IT_SOURCE(heth, ETH_DMAIER_AISE))
{
heth->ErrorCode |= HAL_ETH_ERROR_DMA;
/* if fatal bus error occurred */
if (__HAL_ETH_DMA_GET_IT(heth, ETH_DMASR_FBES))
{
/* Get DMA error code */
heth->DMAErrorCode = READ_BIT(heth->Instance->DMASR, (ETH_DMASR_FBES | ETH_DMASR_TPS | ETH_DMASR_RPS)); <<--- HERE!
/* Disable all interrupts */
__HAL_ETH_DMA_DISABLE_IT(heth, ETH_DMAIER_NISE | ETH_DMAIER_AISE);
/* Set HAL state to ERROR */
heth->gState = HAL_ETH_STATE_ERROR;
}
else
{
/* Get DMA error status */
heth->DMAErrorCode = READ_BIT(heth->Instance->DMASR, (ETH_DMASR_ETS | ETH_DMASR_RWTS |
ETH_DMASR_RBUS | ETH_DMASR_AIS));
/* Clear the interrupt summary flag */
__HAL_ETH_DMA_CLEAR_IT(heth, (ETH_DMASR_ETS | ETH_DMASR_RWTS |
ETH_DMASR_RBUS | ETH_DMASR_AIS));
}My main function
/* Private variables ---------------------------------------------------------*/
ETH_TxPacketConfig TxConfig;
ETH_DMADescTypeDef DMARxDscrTab[ETH_RX_DESC_CNT]; /* Ethernet Rx DMA Descriptors */
ETH_DMADescTypeDef DMATxDscrTab[ETH_TX_DESC_CNT]; /* Ethernet Tx DMA Descriptors */
void HAL_ETH_ErrorCallback(ETH_HandleTypeDef *heth){
uint32_t errorCode = heth->ErrorCode;
}
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_FSMC_Init();
MX_DCMI_Init();
MX_SPI2_Init();
MX_TIM1_Init();
MX_TIM3_Init();
MX_ADC1_Init();
MX_CAN1_Init();
MX_RTC_Init();
MX_TIM4_Init();
MX_UART5_Init();
MX_ETH_Init();
/* USER CODE BEGIN 2 */
/* Start up LCD */
HAL_GPIO_WritePin(LCD_RESET_GPIO_Port, LCD_RESET_Pin, GPIO_PIN_SET);
LCD_BL_ON();
lcdInit();
HAL_GPIO_WritePin(ETH_RESET_GPIO_Port, ETH_RESET_Pin, GPIO_PIN_RESET);
HAL_Delay(1);
HAL_GPIO_WritePin(ETH_RESET_GPIO_Port, ETH_RESET_Pin, GPIO_PIN_SET);
/* Enable interrupt */
HAL_ETH_Start_IT(&heth);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}Hardware settings
The hardware settings are for RMII for the Ethernet PHY DP83848 .
Yes! The LED D1 flashes when something happen at the network. The pin ACT_LED/COL should go low when something happens. The oscillator is at 50 MHz and very close to the DP83848 chip.
Download my project here:
STM32 project:
Schematic project (KiCAD):
Why I'm thinking this be a bug?
Because I have not configured ETH DMA and it give me a bug about that when my Ethernet PHY got a message and pass it over to the STM32 processor. I assume that STM32CubeIDE 1.9.0 have some issues then.
What am I 100% sure that I have been constructed the hardware correctly?
The Ethernet PHY address is 0x1 and I have been veryfied that this is correct address. The LED D1 is flashing when activity occurs at the network.
The callback function calls when the LED D1 flashes after initialization.
@Pavel A.
@Piranha
I found an issue now. This function calls with DevAddr = 0x1, RegAddr = 0x0 and RegVal = 0x8000 which means that RESET is called. That's correct. But this function ONLY calls at the start of the ST-controller. Otherwise...the function is not called any more during the run.
/**
* @brief Write a value to a PHY register through the MDIO interface.
* @param DevAddr: PHY port address
* @param RegAddr: PHY register address
* @param RegVal: Value to be written
* @retval 0 if OK -1 if Error
*/
int32_t ETH_PHY_IO_WriteReg(uint32_t DevAddr, uint32_t RegAddr, uint32_t RegVal)
{
if(HAL_ETH_WritePHYRegister(&heth, DevAddr, RegAddr, RegVal) != HAL_OK)
{
return -1;
}
return 0;
}
