From c8ac5c748a14123967dcbebf264e8dbe355a1e75 Mon Sep 17 00:00:00 2001 From: thread-liu Date: Thu, 21 Jan 2021 09:46:00 +0800 Subject: [PATCH] [update] return value judgment. --- .../stm32mp157a-st-ev1/board/ports/dma_sample.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) diff --git a/bsp/stm32/stm32mp157a-st-ev1/board/ports/dma_sample.c b/bsp/stm32/stm32mp157a-st-ev1/board/ports/dma_sample.c index 6fd88fe0fb..23cc195046 100644 --- a/bsp/stm32/stm32mp157a-st-ev1/board/ports/dma_sample.c +++ b/bsp/stm32/stm32mp157a-st-ev1/board/ports/dma_sample.c @@ -88,8 +88,20 @@ static int uart_dma_sample(int argc, char *argv[]) sizeof(msg_pool), RT_IPC_FLAG_FIFO); - rt_device_open(serial, RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_DMA_RX); - rt_device_set_rx_indicate(serial, uart_input); + ret = rt_device_open(serial, RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_DMA_RX); + if (ret != RT_EOK) + { + rt_kprintf("serial device open fail!.\n"); + return -RT_ERROR; + } + + ret = rt_device_set_rx_indicate(serial, uart_input); + if (ret != RT_EOK) + { + rt_kprintf("set rx indicate fail!.\n"); + return -RT_ERROR; + } + rt_device_write(serial, 0, str, (sizeof(str) - 1)); rt_thread_t thread = rt_thread_create("serial", serial_thread_entry, RT_NULL, 1024, 25, 10);