wifiiot_uart.h中包含声明UART接口函数
- 初始化UART
unsigned int UartInit(WifiIotUartIdx id, const WifiIotUartAttribute *param, const WifiIotUartExtraAttr *extraAttr);
- 取消UART初始化
unsigned int UartDeinit(WifiIotUartIdx id);
- 从UART读取数据
int UartRead(WifiIotUartIdx id, unsigned char *data, unsigned int dataLen);
- 将数据写入UART
int UartWrite(WifiIotUartIdx id, const unsigned char *data, unsigned int dataLen);
- 设置UART流控制
unsigned int UartSetFlowCtrl(WifiIotUartIdx id, WifiIotFlowCtrl flowCtrl);
uart读写测试代码，需要将GPIO5和GPIO6短接进行uart数据自发自收。
#include #include #include "ohos_init.h"#include #include "cmsis_os2.h"#include "wifiiot_gpio.h"#include "wifiiot_gpio_ex.h"#include "wifiiot_adc.h"#include "wifiiot_errno.h"#include "wifiiot_uart.h"static const char *data = "Hello, BearPi!\r\n";#define UART_BUFF_SIZE 1024static void uart_task(void){ uint8_t uart_buffer[UART_BUFF_SIZE] = {0}; uint8_t *pData = uart_buffer; uint32_t ret; WifiIotUartAttribute attr = { .baudRate = 115200, .dataBits = 8, .stopBits = 1, .parity = 0, .pad = 0, }; ret = UartInit(WIFI_IOT_UART_IDX_1,&attr,NULL); if(ret != WIFI_IOT_SUCCESS) { printf("Failed to init uart! Err code = %d\n", ret); return; } printf("UART Test Start\n"); while(1) { UartWrite(WIFI_IOT_UART_IDX_1,(uint8_t *)data,strlen(data)); UartRead(WIFI_IOT_UART_IDX_1,pData,UART_BUFF_SIZE); printf("read data from uart1============>\r\n %s",pData); osDelay(100); }}static void my_led_example(void){ osThreadAttr_t attr; attr.attr_bits = 0; attr.name = "uart"; attr.cb_mem = NULL; attr.cb_size = 0; attr.priority = 24; attr.stack_size = 1024*8; if(osThreadNew((osThreadFunc_t)uart_task,NULL,&attr) == NULL) { printf("Falied to create adc_func!\n"); }}SYS_RUN(my_led_example);
- 运行效果
