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杰理AC63串口收发实例

news 2025/8/19 21:05:21

在event.h文件中预定义串口消息

#define DEVICE_EVENT_FROM_MY_UART      (('M' << 24) | ('Y' << 16) | ('U' << 8) | '\0')

在app_spp_and_le.c文件里对SYS_DEVICE_EVENT做处理，添加收到DEVICE_EVENT_FROM_MY_UART消息时的处理函数my_rx_handler();

    case SYS_DEVICE_EVENT:if ((u32)event->arg == DEVICE_EVENT_FROM_MY_UART) {my_rx_handler();} else if ((u32)event->arg == DEVICE_EVENT_FROM_POWER) {return app_power_event_handler(&event->u.dev, spple_set_soft_poweroff);}

自己新建一个uart_test文件，定义以下串口接收中断回调函数和数据包处理函数

//发出消息通知系统调用my_rx_handler();
static void my_uart_isr_cb(void *ut_bus, u32 status)
{struct sys_event e;/* printf("{##%d}"); */if (status == UT_RX || status == UT_RX_OT) {e.type = SYS_DEVICE_EVENT;e.arg  = (void *)DEVICE_EVENT_FROM_MY_UART;e.u.dev.event = 0;e.u.dev.value = 0;sys_event_notify(&e);}
}//串口接收数据包处理函数//这是收到一帧数据后由串口回调函数通知系统调用的的处理，不是单个字节的串口中断处理
void my_rx_handler(void)
{u8 len = 0;len = uart_bus->read(my_ubuff, -1, 0);printf("Total length : %d \r\n",len);printf(u8 i=0;i<len;i++){printf("%c",my_ubuff[i]);}
}

定义以下串口初始化函数

const uart_bus_t *uart_bus;//定义一个串口结构体
static u8 devBuffer_static[UART_DB_SIZE] __attribute__((aligned(4)));       //dev DMA memory
u8 my_ubuff[200] = {0};
int my_uart_init(void)
{struct uart_platform_data_t u_arg = {0};u_arg.tx_pin = UART_DB_TX_PIN;u_arg.rx_pin = UART_DB_RX_PIN;u_arg.rx_cbuf = devBuffer_static;u_arg.rx_cbuf_size = UART_DB_SIZE;u_arg.frame_length = UART_DB_SIZE;u_arg.rx_timeout = 6;  //ms,兼容波特率较低u_arg.isr_cbfun = my_uart_isr_cb;//中断回调，也可以在中断回调里直接收数据u_arg.baud = UART_BAUD_RATE;u_arg.is_9bit = 0;uart_bus = uart_dev_open(&u_arg);if (uart_bus != NULL) {printf("uart_dev_open() success\n");
//        __this->udev = uart_bus;return 0;}return -1;
}

到此处，串口已经OK了，可以写几个发送函数测试一下。当然也可以使用电脑串口助手测试AC63串口接收。

static void my_uart_putbyte(char a)
{if (uart_bus != NULL) {uart_bus->putbyte(a);}
}static void my_uart_write(char *buf, u16 len)
{if (uart_bus != NULL) {uart_bus->write(buf, len);}
}void send_test(void)
{my_uart_write("123456789\r\n", strlen("123456789\r\n"));
}void uart_test(void)
{sys_timer_add(NULL, send_test, 3000);}