120 lines
2.6 KiB
C
120 lines
2.6 KiB
C
#include "radar_uart.h"
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static struct device *radar_uart_hdl = NULL;//串口操作句柄
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static u8 radar_uart_rx_buf[RADAR_UART_RX_BUF_SIZE]//串口驱动环形缓冲区
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__attribute__((aligned(32)));
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/* UART1初始化 PC6 = TX PC7 = RX */
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UART1_PLATFORM_DATA_BEGIN(radar_uart_data)
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.baudrate = RADAR_UART_BAUDRATE,
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.port = PORT_REMAP,
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.tx_pin = IO_PORTC_06,
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.rx_pin = IO_PORTC_07,
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.output_channel = OUTPUT_CHANNEL3,
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.input_channel = INPUT_CHANNEL3,
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.max_continue_recv_cnt = RADAR_UART_RX_BUF_SIZE,
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.idle_sys_clk_cnt = 500000,
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.clk_src = PLL_48M,
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UART1_PLATFORM_DATA_END();
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/* 注册串口设备 */
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REGISTER_DEVICES(radar_uart_devices) = {
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{
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RADAR_UART_NAME,
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&uart_dev_ops,
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(void *)&radar_uart_data
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},
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};
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int radar_uart_init(void)
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{
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int ret;
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if (radar_uart_hdl) {
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return 0;
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}
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radar_uart_hdl = dev_open(RADAR_UART_NAME, NULL);
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if (!radar_uart_hdl) {
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return -1;
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}//句柄写入失败跳出返回-1
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ret = dev_ioctl(
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radar_uart_hdl,
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UART_SET_CIRCULAR_BUFF_ADDR,//配置驱动缓冲区地址
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(u32)radar_uart_rx_buf
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);
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if (ret) {
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goto error;
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}
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ret = dev_ioctl(
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radar_uart_hdl,
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UART_SET_CIRCULAR_BUFF_LENTH,//配置驱动缓冲区长度
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sizeof(radar_uart_rx_buf)
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);
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if (ret) {
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goto error;
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}
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ret = dev_ioctl(
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radar_uart_hdl,
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UART_SET_RECV_BLOCK,//配置为阻塞接收模式
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1
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);
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if (ret) {
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goto error;
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}
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ret = dev_ioctl(
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radar_uart_hdl,
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UART_SET_RECV_TIMEOUT,//配置接收超时时间
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RADAR_UART_RX_TIMEOUT_MS
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);
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if (ret) {
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goto error;
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}
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ret = dev_ioctl(
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radar_uart_hdl,
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UART_START,//启动串口
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0
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);
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if (ret) {
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goto error;
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}
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return 0;
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//goto error时会跳转至此，释放资源返回ret
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error:
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dev_close(radar_uart_hdl);
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radar_uart_hdl = NULL;
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return ret;
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}
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int radar_uart_read(u8 *buf, u32 len)//从驱动缓冲区读取数据并存到buf中，len为读取的最大长度
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{
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if (!radar_uart_hdl || !buf || !len) {
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return -1;
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}
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return dev_read(radar_uart_hdl, buf, len);
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}
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int radar_uart_write(const u8 *data, u32 len)//给雷达写命令，data为写入数据，len为实际写入长度
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{
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if (!radar_uart_hdl || !data || !len) {
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return -1;
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}
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return dev_write(
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radar_uart_hdl,
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(void *)data,
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len
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);
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}
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