STM32H7 MCU Ethernet issue.,.,

Posted on June 24, 2018 at 19:35

Hello.,.,

We are using STM32H743BIT MCU in our project , I used stm cubeMX to generate driver files (for Keil 5 IDE). In this I am facing an issue in Ethernet interface , Here I can able to Transmit/Receive UDP packet of maximum 512bytes , If I send more then 512Bytes at a time its going to Hard fault handler. 

This is my packet send function , It was working for STM32F7 MCU (even more then 1024 bytes at a time), Now it is not working for STM32H7 MCU.

void UDP_packet_send(uint8_t *Tx_buf,uint16_t length)

{

struct udp_pcb * pcb;

ip_addr_t ipaddr;

struct pbuf *p;

err_t error;

pcb = udp_new();

if (pcb == NULL) {

LWIP_DEBUGF(UDP_DEBUG, ('udp_new failed!\n'));

}

if (udp_bind(pcb, IP_ADDR_ANY, 333) != ERR_OK) {

LWIP_DEBUGF(UDP_DEBUG, ('udp_bind failed!\n'));

}

p = pbuf_alloc (PBUF_TRANSPORT, 8, PBUF_POOL); /* Allocating temporary Memory in RAM for PBUF*/

p->flags = 0;p->len = length;p->next = NULL ;

p->ref = 0x01; p->tot_len = length; p->type = 0x03;

memcpy(p->payload,Tx_buf,length);

IP4_ADDR(&ipaddr, 192.168.16.100);

error = udp_sendto(pcb, p, &ipaddr, 1100); //Sender_PORT

pbuf_free(p); /* De-Allocating temporary Memory in RAM */

udp_remove(pcb);

return;

}

Here i am taking 2 

ETH_RX_DESC_CNT, 2 ETH_TX_DESC_CNT, And is there anything need to be change in following configuration , Please suggest.

&sharppragma location=0x30040000

ETH_DMADescTypeDef DMARxDscrTab[ETH_RX_DESC_CNT]; /* Ethernet Rx DMA Descriptors */

&sharppragma location=0x30040060

ETH_DMADescTypeDef DMATxDscrTab[ETH_TX_DESC_CNT]; /* Ethernet Tx DMA Descriptors */

&sharppragma location=0x30040200

uint8_t Rx_Buff[ETH_RX_DESC_CNT][ETH_MAX_PACKET_SIZE]; /* Ethernet Receive Buffers */

&sharpelif defined ( __CC_ARM ) /* MDK ARM Compiler */

__attribute__((at(0x30040000))) ETH_DMADescTypeDef DMARxDscrTab[ETH_RX_DESC_CNT]; /* Ethernet Rx DMA Descriptors */

__attribute__((at(0x30040060))) ETH_DMADescTypeDef DMATxDscrTab[ETH_TX_DESC_CNT]; /* Ethernet Tx DMA Descriptors */

__attribute__((at(0x30040200))) uint8_t Rx_Buff[ETH_RX_DESC_CNT][ETH_MAX_PACKET_SIZE]; /* Ethernet Receive Buffer */

&sharpelif defined ( __GNUC__ ) /* GNU Compiler */

ETH_DMADescTypeDef DMARxDscrTab[ETH_RX_DESC_CNT] __attribute__((section('.RxDecripSection'))); /* Ethernet Rx DMA Descriptors */

ETH_DMADescTypeDef DMATxDscrTab[ETH_TX_DESC_CNT] __attribute__((section('.TxDecripSection'))); /* Ethernet Tx DMA Descriptors */

uint8_t Rx_Buff[ETH_RX_DESC_CNT][ETH_MAX_PACKET_SIZE] __attribute__((section('.RxArraySection'))); /* Ethernet Receive Buffers */

Thank you

#stm32h7-ethernet #keil-mdk5 #stm32