Posted on July 20, 2017 at 12:19Anyone can provide an example of STM32F437 FreeRTOS + LwIP UDP stream that no loose ethernet packets.
I've tried different implementation but, analyzing the ethernet packets, sometimes one packet is lost.
This is my implementation
void UDP_Send_Task(void const * argument)
{
err_t error;
struct ip4_addr Sendtoipaddr;
for (;;)
{
switch (Eth_MPX_Send_SM)
{
case CREATE_CONNECTION:
IP4_ADDR(&Sendtoipaddr, 192, 168, 10, 124);
conn= udp_new();
error = udp_bind(conn, IP_ADDR_ANY, 1234);
if (error == ERR_OK)
{
PayloadCounter=0;
Eth_MPX_Send_SM= SEND_PCKTS;//start to send pkcts
//vTaskSuspend(NULL);
}
break;
case SEND_PCKTS:
//HAL_GPIO_WritePin(LED5_GPIO_Port, LED5_Pin, GPIO_PIN_RESET);
buf = pbuf_alloc(PBUF_TRANSPORT,sizeof(SendBuff),PBUF_REF);
for (i=0; i<32; i=i+2)
{
SendBuff[i]= (PayloadCounter >>8)& 0xFF;
SendBuff[i+1]= (uint8_t)PayloadCounter & 0xFF;
PayloadCounter ++;
}
buf->payload = SendBuff;
//memcpy (buf->payload, gbuf.mpx.buf, sizeof(gbuf.mpx.buf));
TempBuf = buf->payload;
First= ((uint16_t)TempBuf[0] <<8) | TempBuf[1];
if (First != (Last+1))
{
ErrCount++;
}
Last= ((uint16_t)TempBuf[1022]<<8) | (uint16_t)TempBuf[1023];
error= udp_sendto(conn, buf, &Sendtoipaddr, 1234);
if (error != ERR_OK)
{
NetErr++;
}
//netbuf_free(buf);
pbuf_free(buf); //De-allocate packet buffer
vTaskDelay(pdMS_TO_TICKS(1));
//NetDataAvailable =FALSE;
//HAL_GPIO_WritePin(LED5_GPIO_Port, LED5_Pin, GPIO_PIN_SET);
//vTaskSuspend(NULL);
break;
}
}
}
Thanks
#example #udp-test-tool #lwip #stm32f4 #udp #streaming
