• gd32F470串口重定义

    c代码：

    1. /*
    2.  * @Author: Bleaach008
    3.  * @Date: 2024-07-10 17:31:01
    4.  * @LastEditTime: 2024-07-11 09:42:06
    5.  * @FilePath: \MDK-ARMd:\Code\GD32\GD01_UART\MyApplication\Public.c
    6.  * @Description:
    7.  *
    8.  * Copyright (c) 2024 by 008, All Rights Reserved.
    9.  */
    10. /* Includes ------------------------------------------------------------------*/
    11. #include "MyApplication.h"
    12.  
    13. /* Private define-------------------------------------------------------------*/
    14.  
    15. /* Private variables----------------------------------------------------------*/
    16.  
    17. /* Public variables-----------------------------------------------------------*/
    18.  
    19. /* Private function prototypes------------------------------------------------*/
    20. /**
    21.  * @name: usart_debug_init
    22.  * @brief: 串口调试口初始化
    23.  * @param: {None}
    24.  * @retval: 
    25.  */
    26. void usart_debug_init()
    27. {
    28.     /* 初始化GPIO外设 */
    29.     rcu_periph_clock_enable(EVAL_COM0_GPIO_CLK);
    30.     /* 初始化USART外设 */
    31.     rcu_periph_clock_enable(EVAL_COM0_CLK); // 使能串口0时钟
    32.                                             /*GPIO复用功能*/
    33.     gpio_af_set(EVAL_COM0_GPIO_PORT, EVAL_COM0_AF, EVAL_COM0_TX_PIN);
    34.     gpio_af_set(EVAL_COM0_GPIO_PORT, EVAL_COM0_AF, EVAL_COM0_RX_PIN);
    35.     /* TX管脚，PA9，复用推挽输出，速度50MHz */
    36.     gpio_mode_set(EVAL_COM0_GPIO_PORT, GPIO_MODE_AF, GPIO_PUPD_NONE, EVAL_COM0_TX_PIN);
    37.     /* RX管脚，PA10，下拉输入，速度50MHz */
    38.     gpio_mode_set(EVAL_COM0_GPIO_PORT, GPIO_MODE_AF, GPIO_PUPD_NONE, EVAL_COM0_RX_PIN);
    39.     /*配置TX为推挽输出 50MHZ*/
    40.     gpio_output_options_set(EVAL_COM0_GPIO_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, EVAL_COM0_TX_PIN);
    41.     /*配置RX为推挽输出 50MHZ*/
    42.     gpio_output_options_set(EVAL_COM0_GPIO_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, EVAL_COM0_RX_PIN);
    43.  
    44.     usart_deinit(EVAL_COM0);
    45.     usart_baudrate_set(EVAL_COM0, 115200);                   // 波特率115200
    46.     usart_parity_config(EVAL_COM0, USART_PM_NONE);           // 无校检
    47.     usart_word_length_set(EVAL_COM0, USART_WL_8BIT);         // 8位数据位
    48.     usart_stop_bit_set(EVAL_COM0, USART_STB_1BIT);           // 1位停止位
    49.     usart_transmit_config(EVAL_COM0, USART_TRANSMIT_ENABLE); // 使能串口发送
    50.     usart_receive_config(EVAL_COM0, USART_RECEIVE_ENABLE);   // 使能串口接收
    51.     usart_enable(EVAL_COM0);                                 // 使能串口
    52. }
    53. int fputc(int ch, FILE *f)
    54. {
    55.     // 通过查询的方式循环发送
    56.     /* 发送一个字节数据到串口 */
    57.     usart_data_transmit(EVAL_COM0, (uint8_t)ch);
    58.  
    59.     /* 等待发送完毕 */
    60.     while (usart_flag_get(EVAL_COM0, USART_FLAG_TBE) == RESET)
    61.         ;
    62.  
    63.     return (ch);
    64. }
    65.  
    66. /// 重定向c库函数scanf到串口，重写向后可使用scanf、getchar等函数
    67. int fgetc(FILE *f)
    68. {
    69.     /* 等待串口输入数据 */
    70.     while (usart_flag_get(EVAL_COM0, USART_FLAG_RBNE) == RESET)
    71.         ;
    72.  
    73.     return (int)usart_data_receive(EVAL_COM0);
    74. }
    75. /********************************************************
    76.   End Of File
    77. ********************************************************/

    头文件定义：

    1. /*!
    2.     \file    gd32f470i_eval.h
    3.     \brief   definitions for GD32F470_EVAL's leds, keys and COM ports hardware resources
    4.   
    5.     \version 2022-04-18, V2.0.0, demo for GD32F4xx
    6. */
    7.  
    8. /*
    9.     Copyright (c) 2022, GigaDevice Semiconductor Inc.
    11.     Redistribution and use in source and binary forms, with or without modification, 
    12. are permitted provided that the following conditions are met:
    14.     1. Redistributions of source code must retain the above copyright notice, this 
    15.        list of conditions and the following disclaimer.
    16.     2. Redistributions in binary form must reproduce the above copyright notice, 
    17.        this list of conditions and the following disclaimer in the documentation 
    18.        and/or other materials provided with the distribution.
    19.     3. Neither the name of the copyright holder nor the names of its contributors 
    20.        may be used to endorse or promote products derived from this software without 
    21.        specific prior written permission.
    23.     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
    24. AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
    25. WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
    26. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
    27. INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
    28. NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
    29. PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
    30. WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
    31. ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
    32. OF SUCH DAMAGE.
    33. */
    34.  
    35. #ifndef GD32F470I_EVAL_H
    36. #define GD32F470I_EVAL_H
    37.  
    38. #ifdef __cplusplus
    39.  extern "C" {
    40. #endif
    41.  
    42. #include "gd32f4xx.h"
    43.    
    44. /* exported types */
    45. typedef enum 
    46. {
    47.     LED1 = 0,
    48.     LED2 = 1,
    49.     LED3 = 2
    50. } led_typedef_enum;
    51.  
    52. typedef enum 
    53. {
    54.     KEY_WAKEUP = 0,
    55.     KEY_TAMPER = 1,
    56.     KEY_USER = 2
    57. } key_typedef_enum;
    58.  
    59. typedef enum 
    60. {
    61.     KEY_MODE_GPIO = 0,
    62.     KEY_MODE_EXTI = 1
    63. } keymode_typedef_enum;
    64.  
    65. /* eval board low layer led */
    66. #define LEDn                             3U
    67.  
    68. #define LED1_PIN                         GPIO_PIN_2
    69. #define LED1_GPIO_PORT                   GPIOE
    70. #define LED1_GPIO_CLK                    RCU_GPIOE
    71.   
    72. #define LED2_PIN                         GPIO_PIN_3
    73. #define LED2_GPIO_PORT                   GPIOE
    74. #define LED2_GPIO_CLK                    RCU_GPIOE
    75.   
    76. #define LED3_PIN                         GPIO_PIN_10
    77. #define LED3_GPIO_PORT                   GPIOF
    78. #define LED3_GPIO_CLK                    RCU_GPIOF
    79.  
    80. #define COMn                             1U
    81. #define EVAL_COM0                        USART0
    82. #define EVAL_COM0_CLK                    RCU_USART0
    83.  
    84. #define EVAL_COM0_TX_PIN                 GPIO_PIN_9
    85. #define EVAL_COM0_RX_PIN                 GPIO_PIN_10
    86.  
    87. #define EVAL_COM0_GPIO_PORT              GPIOA
    88. #define EVAL_COM0_GPIO_CLK               RCU_GPIOA
    89. #define EVAL_COM0_AF                     GPIO_AF_7
    90.  
    91. #define KEYn                             3U
    92.  
    93. /* tamper push-button */
    94. #define TAMPER_KEY_PIN                   GPIO_PIN_13
    95. #define TAMPER_KEY_GPIO_PORT             GPIOC
    96. #define TAMPER_KEY_GPIO_CLK              RCU_GPIOC
    97. #define TAMPER_KEY_EXTI_LINE             EXTI_13
    98. #define TAMPER_KEY_EXTI_PORT_SOURCE      EXTI_SOURCE_GPIOC
    99. #define TAMPER_KEY_EXTI_PIN_SOURCE       EXTI_SOURCE_PIN13
    100. #define TAMPER_KEY_EXTI_IRQn             EXTI10_15_IRQn
    101.  
    102. /* wakeup push-button */
    103. #define WAKEUP_KEY_PIN                   GPIO_PIN_0
    104. #define WAKEUP_KEY_GPIO_PORT             GPIOA
    105. #define WAKEUP_KEY_GPIO_CLK              RCU_GPIOA
    106. #define WAKEUP_KEY_EXTI_LINE             EXTI_0
    107. #define WAKEUP_KEY_EXTI_PORT_SOURCE      EXTI_SOURCE_GPIOA
    108. #define WAKEUP_KEY_EXTI_PIN_SOURCE       EXTI_SOURCE_PIN0
    109. #define WAKEUP_KEY_EXTI_IRQn             EXTI0_IRQn  
    110.  
    111. /* user push-button */
    112. #define USER_KEY_PIN                     GPIO_PIN_14
    113. #define USER_KEY_GPIO_PORT               GPIOB
    114. #define USER_KEY_GPIO_CLK                RCU_GPIOB
    115. #define USER_KEY_EXTI_LINE               EXTI_14
    116. #define USER_KEY_EXTI_PORT_SOURCE        EXTI_SOURCE_GPIOB
    117. #define USER_KEY_EXTI_PIN_SOURCE         EXTI_SOURCE_PIN14
    118. #define USER_KEY_EXTI_IRQn               EXTI10_15_IRQn
    119.  
    120. /* function declarations */
    121. /* configures led GPIO */
    122. void gd_eval_led_init(led_typedef_enum lednum);
    123. /* turn on selected led */
    124. void gd_eval_led_on(led_typedef_enum lednum);
    125. /* turn off selected led */
    126. void gd_eval_led_off(led_typedef_enum lednum);
    127. /* toggle the selected led */
    128. void gd_eval_led_toggle(led_typedef_enum lednum);
    129. /* configure key */
    130. void gd_eval_key_init(key_typedef_enum key_num, keymode_typedef_enum key_mode);
    131. /* return the selected button state */
    132. uint8_t gd_eval_key_state_get(key_typedef_enum button);
    133. /* configure COM port */
    134. void gd_eval_com_init(uint32_t com);
    135.  
    136.  
    137. #ifdef __cplusplus
    138. }
    139. #endif
    140.  
    141. #endif /* GD32F470I_EVAL_H */

    测试结果：

    ​image​

    ​image​

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  • 原文地址：https://blog.csdn.net/weixin_46066669/article/details/140367243