uart_socket_t* uart_open(uart_set_str *puartpara)
{
PinName uart_tx = PA_7;//PA_4; //PA_7
PinName uart_rx = PA_6;//PA_0; //PA_6
uart_socket_t *u;
u = (uart_socket_t *)RtlZmalloc(sizeof(uart_socket_t));
if(!u){
uart_printf("%s(): Alloc memory for uart_socket failed!\n", __func__);
return NULL;
}
/*initial uart */
serial_init(&u->sobj, uart_tx,uart_rx);
serial_baud(&u->sobj,puartpara->BaudRate);
serial_format(&u->sobj, puartpara->number, (SerialParity)puartpara->parity, puartpara->StopBits);
/*uart irq handle*/
serial_irq_handler(&u->sobj, uart_irq, (int)u);
serial_irq_set(&u->sobj, RxIrq, 1);
serial_irq_set(&u->sobj, TxIrq, 1);
#if UART_SOCKET_USE_DMA_TX
serial_send_comp_handler(&u->sobj, (void*)uart_send_stream_done, (uint32_t)u);
#endif
/*alloc a socket*/
u->fd = lwip_allocsocketsd();
if(u->fd == -1){
uart_printf("Failed to alloc uart socket!\n");
goto Exit2;
}
/*init uart related semaphore*/
RtlInitSema(&u->action_sema, 0);
RtlInitSema(&u->tx_sema, 1);
RtlInitSema(&u->dma_tx_sema, 1);
/*create uart_thread to handle send&recv data*/
{
#define UART_ACTION_STACKSIZE 512
#define UART_ACTION_PRIORITY 1
if(xTaskCreate(uart_action_handler, ((const char*)"uart_action"), UART_ACTION_STACKSIZE, u, UART_ACTION_PRIORITY, NULL) != pdPASS){
uart_printf("%s xTaskCreate(uart_action) failed", __FUNCTION__);
goto Exit1;
}
}
return u;
Exit1:
/* Free uart related semaphore */
RtlFreeSema(&u->action_sema);
RtlFreeSema(&u->tx_sema);
RtlFreeSema(&u->dma_tx_sema);
Exit2:
RtlMfree((u8*)u, sizeof(uart_socket_t));
return NULL;
}
void example_uvc(void)
{
/*init payload queue*/
INIT_LIST_HEAD(&payload_queue.wait_queue);
INIT_LIST_HEAD(&payload_queue.done_queue);
RtlMutexInit(&payload_queue.wait_mutex);
RtlMutexInit(&payload_queue.done_mutex);
RtlInitSema(&payload_queue.wait_sema, 0);
RtlInitSema(&payload_queue.done_sema, 0);
payload_queue.flush_err = 0;
uvc_stream_init();
}