Hi all,
I am using a STM32H747XIH6 MCU.
I developed an application using LwIP library.
When I connect my circuit directly to the computer, the application works stably. But when I connect the circuit to the LAN network, the application encounters a hardfault interrupt. Before the interrupt occurs, the application sends the message 'LWIP_DEBUGF(IP_REASS_DEBUG, ("ip_reass_tmr: timer timed out\n"));' in the ip_reass_tmr() function at the file ip4_frag.c.
void
ip_reass_tmr(void)
{
struct ip_reassdata *r, *prev = NULL;
r = reassdatagrams;
while (r != NULL) {
/* Decrement the timer. Once it reaches 0,
* clean up the incomplete fragment assembly */
if (r->timer > 0) {
r->timer--;
LWIP_DEBUGF(IP_REASS_DEBUG, ("ip_reass_tmr: timer dec %"U16_F"\n", (u16_t)r->timer));
prev = r;
r = r->next;
} else {
/* reassembly timed out */
struct ip_reassdata *tmp;
LWIP_DEBUGF(IP_REASS_DEBUG, ("ip_reass_tmr: timer timed out\n"));
tmp = r;
/* get the next pointer before freeing */
r = r->next;
/* free the helper struct and all enqueued pbufs */
ip_reass_free_complete_datagram(tmp, prev);
}
}
}
What is particularly unique in my LAN network is that there are many devices sending broadcast messages continuously. This is the ethernet configuration in my application:
#if defined ( __ICCARM__ ) /*!< IAR Compiler */
#pragma location=0x30000000
ETH_DMADescTypeDef DMARxDscrTab[ETH_RX_DESC_CNT]; /* Ethernet Rx DMA Descriptors */
#pragma location=0x30000060
ETH_DMADescTypeDef DMATxDscrTab[ETH_TX_DESC_CNT]; /* Ethernet Tx DMA Descriptors */
#pragma location=0x30000200
uint8_t Rx_Buff[ETH_RX_DESC_CNT][ETH_RX_BUFFER_SIZE]; /* Ethernet Receive Buffers */
#elif defined ( __CC_ARM ) /* MDK ARM Compiler */
__attribute__((at(0x30000000))) ETH_DMADescTypeDef DMARxDscrTab[ETH_RX_DESC_CNT]; /* Ethernet Rx DMA Descriptors */
__attribute__((at(0x30000060))) ETH_DMADescTypeDef DMATxDscrTab[ETH_TX_DESC_CNT]; /* Ethernet Tx DMA Descriptors */
__attribute__((at(0x30000200))) uint8_t Rx_Buff[ETH_RX_DESC_CNT][ETH_RX_BUFFER_SIZE]; /* Ethernet Receive Buffer */
#elif 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_RX_BUFFER_SIZE] __attribute__((section(".RxArraySection"))); /* Ethernet Receive Buffers */
/* ########################### Ethernet Configuration ######################### */
#define ETH_TX_DESC_CNT 4 /* number of Ethernet Tx DMA descriptors */
#define ETH_RX_DESC_CNT 4 /* number of Ethernet Rx DMA descriptors */
Any idea why this is happening?
