69 lines
2.2 KiB
C
69 lines
2.2 KiB
C
/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2022-06-14 fize the first version
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*/
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#include "user_uart.h"
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static rt_err_t uart3_tx_complete(rt_device_t dev, void *buffer)
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{
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//todo: uart3_tx_complete sem: do nothing for now.
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//since dma for tx not enabled,so this callback will not be called at any time.
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LOG_I("massage sent %s",strlen(buffer));
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return RT_EOK;
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}
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//dev 设备句柄（回调函数参数）
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//size 缓冲区数据大小（回调函数参数）
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//still in ISR func,so can only use ulog at asynchronous mode.
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static rt_err_t uart3_rx_complete(rt_device_t dev, rt_size_t size)
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{
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char testbuff[20];
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uart3_simpack.rx_num=size;
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rt_sem_release(&uart3_simpack.rx_sem);
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rt_device_read(serial3,0,testbuff, size);
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// can only use ulog at asynchronous mode.
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LOG_I("massage received : %s",testbuff);
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return RT_EOK;
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}
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rt_device_t uart3_init(void)
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{
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struct serial_configure config;
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serial3 = rt_device_find(USER_UART_NAME);
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if (serial3 == RT_NULL)
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{
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LOG_E("could not find device: %s", USER_UART_NAME);
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return RT_NULL;
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}
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config.baud_rate = BAUD_RATE_115200; //修改波特率为 115200
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config.data_bits = DATA_BITS_8; //数据位 8
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config.stop_bits = STOP_BITS_1; //停止位 1
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config.bufsz = 2048; //修改缓冲区 buff size 为 2048
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config.parity = PARITY_NONE; //无奇偶校验位
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rt_device_control(serial3, RT_DEVICE_CTRL_CONFIG, &config);
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if ((rt_device_set_tx_complete(serial3, uart3_tx_complete) || rt_device_set_rx_indicate(serial3, uart3_rx_complete))
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!= RT_EOK)
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{
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LOG_E("could not set %s 's rx|tx callback func", USER_UART_NAME);
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return RT_NULL;
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}
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//do not ust dma for rx and tx at same time
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if ( rt_device_open(serial3, RT_DEVICE_FLAG_INT_TX |RT_DEVICE_FLAG_DMA_RX|RT_DEVICE_OFLAG_RDWR ))
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{
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LOG_E("could not open device: %s", USER_UART_NAME);
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return RT_NULL;
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}
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rt_sem_init(&uart3_simpack.rx_sem, "rx3_sem", 0, RT_IPC_FLAG_PRIO);
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rt_sem_init(&uart3_simpack.tx_sem, "tx3_sem", 0, RT_IPC_FLAG_PRIO);
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return serial3;
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}
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