Nordic 使用串口UART打印

港控/mmm° 2022-12-29 06:41 404阅读 0赞

## Nordic 使用串口UART打印 ##

#### 1. sdk\_config ####

**nRF\_Drivers UART\_ENABLE**  
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**nRF\_Libraries APP\_UART\_ENABLE**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2R1YXBwbGU_size_16_color_FFFFFF_t_70 1]

#### 2. 添加文件 ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2R1YXBwbGU_size_16_color_FFFFFF_t_70 2]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2R1YXBwbGU_size_16_color_FFFFFF_t_70 3]  
接下来是，添加串口初始化函数和回调，可以添加到我们字节的`.c`文件中。  
`myuart.c`

#include "app_uart.h"
    #include "myuart.h"
    #include "nrf_log.h"
    #include "nrf_uart.h"
    #include "nrf_uarte.h"
    #include "pca_rail_lubricator.h"
    #include "mylog.h"
    
    #include "myota.h"
    
    #define UART_RX_BUFF_LEN (255)
    
    /**@brief Function for handling app_uart events. * * @details This function will receive a single character from the app_uart module and append it to * a string. The string will be be sent over BLE when the last character received was a * 'new line' '\n' (hex 0x0A) or if the string has reached the maximum data length. */
    /**@snippet [Handling the data received over UART] */
    void uart_event_handle(app_uart_evt_t * p_event)
    { 
        static uint8_t data_array[UART_RX_BUFF_LEN];
        static uint8_t index = 0;
        uint32_t       err_code;
    
        switch (p_event->evt_type)
        { 
            case APP_UART_DATA_READY:
                UNUSED_VARIABLE(app_uart_get(&data_array[index]));
                index++;
    
                if ((data_array[index - 1] == '\n') ||
                    (data_array[index - 1] == '\r') ||
                    (index >= UART_RX_BUFF_LEN))
                { 
                    if (index > 1)
                    { 
    					NRF_NUS_LOG_INFO("rx data: %s", data_array);
    					if ( 0 == strncmp((const char *)data_array, "ota_upgrade", 11))
    					{ 
    						NRF_NUS_LOG_INFO("ota_upgrade");
    						myota_upgrade_processing();
    					}
                    }
    
                    index = 0;
                }
                break;
    
            case APP_UART_COMMUNICATION_ERROR:
                APP_ERROR_HANDLER(p_event->data.error_communication);
                break;
    
            case APP_UART_FIFO_ERROR:
                APP_ERROR_HANDLER(p_event->data.error_code);
                break;
    
            default:
                break;
        }
    }
    /**@snippet [Handling the data received over UART] */
    
    
    /**@brief Function for initializing the UART module. */
    /**@snippet [UART Initialization] */
    void myuart_init(void)
    { 
        uint32_t                     err_code;
        app_uart_comm_params_t const comm_params =
        { 
            .rx_pin_no    = RX_PIN_NUMBER,
            .tx_pin_no    = TX_PIN_NUMBER,
            .rts_pin_no   = RTS_PIN_NUMBER,
            .cts_pin_no   = CTS_PIN_NUMBER,
            .flow_control = APP_UART_FLOW_CONTROL_DISABLED,
            .use_parity   = false,
    #if defined (UART_PRESENT)
            .baud_rate    = NRF_UART_BAUDRATE_115200
    #else
            .baud_rate    = NRF_UARTE_BAUDRATE_115200
    #endif
        };
    
        APP_UART_FIFO_INIT(&comm_params,
                           UART_RX_BUF_SIZE,
                           UART_TX_BUF_SIZE,
                           uart_event_handle,
                           APP_IRQ_PRIORITY_LOWEST,
                           err_code);
        APP_ERROR_CHECK(err_code);
    }
    /**@snippet [UART Initialization] */

`myuart.h`

#ifndef __MYUART_H
    #define __MYUART_H
    
    #define UART_TX_BUF_SIZE (256)
    #define UART_RX_BUF_SIZE (256)
    
    void myuart_init(void);
    
    #endif /* __MYUART_H */

在`pca_**.h`板子定义`.h`文件中，定义我们的UART引脚。我这里使用的是P1口的13,15脚。  
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在`main.c`中调用我们的`myuart_init`，初始化我们的串口。

此时，已经可以通过`app_uart_get`和`app_uart_put`接收和发送字符了。

#### 3. 定义自己的UART\_LOG\_INFO ####

`uart_pint.c`

#include "uart_print.h"
    #include "string.h"
    #include "app_uart.h"
    
    void uart_send_str(char *data)
    { 
    	size_t len = 0;
    	len = strlen(data);
    	
    	for (int i = 0; i < len; i++) { 
    		app_uart_put(data[i]);
    	}
    }
    
    void uart_send_log(char *data)
    { 
    	uart_send_str(data);
    	app_uart_put('\r');
    	app_uart_put('\n');
    }

`uart_print.h`

#ifndef __UART_PRINT_H
    #define __UART_PRINT_H
    
    #include "nrf_log.h"
    
    void uart_send_str(char *data);
    void uart_send_log(char *data);
    
    #ifdef UART_PRINT
    #define UART_LOG_INFO(...) \ do { char buff[256]; \ snprintf(buff, 256, __VA_ARGS__);\ uart_send_log(buff); \ } while (0);
    #else
    #define UART_LOG_INFO(...) NRF_LOG_INFO(__VA_ARGS__)
    #endif
    	
    #endif /* __UART_PRINT_H */

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2R1YXBwbGU_size_16_color_FFFFFF_t_70 5]

添加串口打印宏定义  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2R1YXBwbGU_size_16_color_FFFFFF_t_70 6]

好了，在需要的文件中导入`uart_print.h`，即可使用串口打印。当不需要串口打印的时候，删除`UART_PRINT`宏定义，则使用`NRF_LOG_INFO`进行日志输出。

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