注意，本文的內容過於老舊，不建議實際使用，僅保留以作為參考用。
前言
在先前的[STM32學習記錄-3] 基本輸入與輸出教學-GPIO相關程式寫法中已經介紹過STM32設定GPIO的相關函式，但如果是常用Arduion的人一定不太習慣這種設定方式，畢竟每設定一個GPIO就要打4行程式，雖然可以複製貼上，但程式一多難免看起來混亂複雜，所以我自己寫了一些GPIO相關的函式，方便自己未來使用。
GPIO模式設定函式
程式如下：
/* Includes ------------------------------------------------------------------*/#include "GPIO_mapping.h"
/* Private typedef -----------------------------------------------------------*//* Private define ------------------------------------------------------------*/// Pin Mode and Speed#define OUT (0) // Output#define IN (1) // Input
#define GPPP (0) // General purpose Push-Pull (Output)#define GPOD (1) // General purpose Open-Drain (Output)#define AFPP (2) // Alternate function Push-Pull (Output)#define AFOD (3) // Alternate function Open-Drain (Output)
#define FL (0) // Floating (Input)#define AN (1) // Analog (Input)#define PD (2) // Pull-Down (Input)#define PU (3) // Pull-Up (Input)
#define S2M (2) // 2MHz#define S10M (10) // 10MHz#define S50M (50) // 50MHz
/* Private macro -------------------------------------------------------------*//* Private variables ---------------------------------------------------------*//* Private function prototypes -----------------------------------------------*//* Private functions ---------------------------------------------------------*/
/** * @brief Config a pin mode and speed. * @param PortPin: select a pin to set. * This parameter should be: 0 ~ 79 * 0~15:PA0~PA15; 16~31:PB0~PB15; 32~47:PC0~PC15; * 48~63:PD0~PD15; 64~79:PE0~PE15 * @param INout: Input or Output. * This parameter should be: 0(Output) or 1(Input). * @param Mode: Pin mode. * This parameter should be: 0~3. * 0: GPPP or FL. * 1: GPOD or AN. * 2: AFPP or PD. * 3: AFOD or PU. * @param Speed: Pin speed. * This parameter should be: 2, 10 or 50. * 2: 2MHz. * 10: 10MHz. * 50: 50MHz. * @retval None */void Pin_Mod(u8 PortPin, u8 INout, u8 Mode, u8 Speed){ /* Structure Declarations */ GPIO_InitTypeDef GPIO_InitStructure;
// GPIO_Speed switch(Speed) { case S2M: // S2M:2 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz; break; case S10M: // S10M:10 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz; break; case S50M: // S50M:50 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; break; default: break; }
// GPIO_Mode if(INout == OUT) // OUT:0 { switch(Mode) { case GPPP: // GPPP:0 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; break; case GPOD: // GPOD:1 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD; break; case AFPP: // AFPP:2 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; break; case AFOD: // AFOD:3 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD; break; default: break; } } else if(INout == IN) // IN:1 { switch(Mode) { case FL: // FL:0 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; break; case AN: // AN:1 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN; break; case PD: // PD:2 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD; break; case PU: // PU:3 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; break; default: break; } }
// GPIO_Pin & GPIO_Init() function. if(PortPin <= 15) // Port-A: 0~15 { GPIO_InitStructure.GPIO_Pin = ((uint16_t)(0x0001 << PortPin)); GPIO_Init(GPIOA, &GPIO_InitStructure); } else if(PortPin <= 31) // Port-B: 16~31 { GPIO_InitStructure.GPIO_Pin = ((uint16_t)(0x0001 << (PortPin - 16))); GPIO_Init(GPIOB, &GPIO_InitStructure); } else if(PortPin <= 47) // Port-C: 32~47 { GPIO_InitStructure.GPIO_Pin = ((uint16_t)(0x0001 << (PortPin - 32))); GPIO_Init(GPIOC, &GPIO_InitStructure); } else if(PortPin <= 63) // Port-D: 48~63 { GPIO_InitStructure.GPIO_Pin = ((uint16_t)(0x0001 << (PortPin - 48))); GPIO_Init(GPIOD, &GPIO_InitStructure); } else if(PortPin <= 79) // Port-E: 64~79 { GPIO_InitStructure.GPIO_Pin = ((uint16_t)(0x0001 << (PortPin - 64))); GPIO_Init(GPIOE, &GPIO_InitStructure); } else /* Null */; // Out of range(0~79)}
#undef OUT#undef IN
#undef GPPP#undef GPOD#undef AFPP#undef AFOD
#undef FL#undef AN#undef PD#undef PU
#undef S2M#undef S10M#undef S50M可以看到裡面就是增加了“void Pin_Mod(u8 PortPin, u8 INout, u8 Mode, u8 Speed)”此一函式。其用法如下：
/* STM32 Nucleo-64 board */Pin_Mod(PA5, OUT, GPPP, S2M); // PA5: LED-user//GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;//GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;//GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;//GPIO_Init(GPIOA, &GPIO_InitStructure);
Pin_Mod(PC13, IN, FL, S2M); // PC13: Button-user//GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;//GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;//GPIO_Init(GPIOC, &GPIO_InitStructure);
/* USART */Pin_Mod(PA2, OUT, AFPP, S50M); // PA2: USART2_TX//GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;//GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;//GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;//GPIO_Init(GPIOA, &GPIO_InitStructure);
Pin_Mod(PA3, IN, FL, S50M); // PA3: USART2_RX//GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;//GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;//GPIO_Init(GPIOA, &GPIO_InitStructure);這樣的話就可以更簡單方便地設定GPIO了。
至於其引入的“GPIO_mapping.h”內容如下：（只適用於STM32F103RB，請依照自己的MCU腳位更改）
/** ****************************************************************************** * @file GPIO_mapping.h * @author ZiTe * @version V1.0.0 * @date 08-October-2019 * @brief Header for GPIO_Function.c module for STM32F103RB ****************************************************************************** * @attention * * This file is used ONLY for STM32F103RB(STM32 Nucleo-64 board). * ****************************************************************************** */
/* Define to prevent recursive inclusion -------------------------------------*/#ifndef __GPIO_MAPPING_H#define __GPIO_MAPPING_H
/* Includes ------------------------------------------------------------------*//* Exported types ------------------------------------------------------------*//* Exported constants --------------------------------------------------------*/
/* STM32 Pin(Morpho) *//* * Default=Alternate functions Default * MA=Main function(after reset) * Remap=Alternate functions Remap */
// Port-A#define PA0 (0) // WKUP/USART2_CTS/ADC12_IN0/TIM2_CH1_ETR#define PA1 (1) // USART2_RTS/ADC12_IN1/TIM2_CH2#define PA2 (2) // USART2_TX/ADC12_IN2/TIM2_CH3#define PA3 (3) // USART2_RX/ADC12_IN3/TIM2_CH4#define PA4 (4) // SPI1_NSS/USART2_CK/ADC12_IN4#define PA5 (5) // SPI1_SCK/ADC12_IN5#define PA6 (6) // SPI1_MISO/ADC12_IN6/TIM3_CH1;Remap:TIM1_BKIN#define PA7 (7) // SPI1_MOSI/ADC12_IN7/TIM3_CH2;Remap:TIM1_CH1N#define PA8 (8) // USART1_CK/TIM1_CH1/MCO#define PA9 (9) // USART1_TX/TIM1_CH2#define PA10 (10) // USART1_RX/TIM1_CH3#define PA11 (11) // USART1_CTS/CANRX/USBDM/TIM1_CH4#define PA12 (12) // USART1_RTS/CANTX/USBDP/TIM1_ETR#define PA13 (13) // MA:JTMS/SWDIO;Remap:PA13#define PA14 (14) // MA:JTCK/SWCLK;Remap:PA14#define PA15 (15) // MA:JTDI;Remap:TIM2_CH1_ETR/ PA15/SPI1_NSS
// Port-B#define PB0 (16) // ADC12_IN8/TIM3_CH3;Remap:TIM1_CH2N#define PB1 (17) // ADC12_IN9/TIM3_CH4;Remap:TIM1_CH3N#define PB2 (18) // MA:PB2/BOOT1#define PB3 (19) // MA:JTDO;Remap:TIM2_CH2/PB3/TRACESWO/SPI1_SCK#define PB4 (20) // MA:JNTRST;Remap:TIM3_CH1/PB4/SPI1_MISO#define PB5 (21) // I2C1_SMBAl;Remap:TIM3_CH2/SPI1_MOSI#define PB6 (22) // I2C1_SCL/TIM4_CH1;Remap:USART1_TX#define PB7 (23) // I2C1_SDA/TIM4_CH2;Remap:USART1_RX#define PB8 (24) // TIM4_CH3;Remap:I2C1_SCL/CANRX#define PB9 (25) // TIM4_CH4;Remap:I2C1_SDA/CANTX#define PB10 (26) // I2C2_SCL/USART3_TX;Remap:TIM2_CH3#define PB11 (27) // I2C2_SDA/USART3_RX;Remap:TIM2_CH4#define PB12 (28) // SPI2_NSS/I2C2_SMBAl/USART3_CK/TIM1_BKIN#define PB13 (29) // SPI2_SCK/USART3_CTS/TIM1_CH1N#define PB14 (30) // SPI2_MISO/USART3_RTS/TIM1_CH2N#define PB15 (31) // SPI2_MOSI/TIM1_CH3N
// Port-C#define PC0 (32) //#define PC1 (33) //#define PC2 (34) //#define PC3 (35) //#define PC4 (36) //#define PC5 (37) //#define PC6 (38) //#define PC7 (39) //#define PC8 (40) //#define PC9 (41) //#define PC10 (42) //#define PC11 (43) //#define PC12 (44) //#define PC13 (45) //#define PC14 (46) //#define PC15 (47) //
// Port-D#define PD0 (48) //#define PD1 (49) //#define PD2 (50) //#define PD3 (51) //#define PD4 (52) //#define PD5 (53) //#define PD6 (54) //#define PD7 (55) //#define PD8 (56) //#define PD9 (57) //#define PD10 (58) //#define PD11 (59) //#define PD12 (60) //#define PD13 (61) //#define PD14 (62) //#define PD15 (63) //
// Port-E#define PE0 (64) //#define PE1 (65) //#define PE2 (66) //#define PE3 (67) //#define PE4 (68) //#define PE5 (69) //#define PE6 (70) //#define PE7 (71) //#define PE8 (72) //#define PE9 (73) //#define PE10 (74) //#define PE11 (75) //#define PE12 (76) //#define PE13 (77) //#define PE14 (78) //#define PE15 (79) //
/* Arduino Pin */// Analog(CN8)#define A0 (0) // PA0#define A1 (1) // PA1#define A2 (4) // PA4#define A3 (16) // PB0#define A4 (33) // PC1(or PB9,change by solder bridges)#define A5 (32) // PC0(or PB8,change by solder bridges)
// Digital(CN9)#define D0 (3) // PA3(USART2_RX)#define D1 (2) // PA2(USART2_TX)#define D2 (10) // PA10#define D3 (19) // PB3(PWM)#define D4 (21) // PB5#define D5 (20) // PB4(PWM)#define D6 (26) // PB10(PWM)#define D7 (8) // PA8
// Digital(CN5)#define D8 (9) // PA9#define D9 (39) // PC7(PWM)#define D10 (22) // PB6(PWM/CS)#define D11 (7) // PA7(PWM/MOSI)#define D12 (6) // PA6(MISO)#define D13 (5) // PA5(SCK)#define D14 (25) // PB9(SDA)#define D15 (24) // PB8(SCL)
/* STM32 Nucleo-64 board */#define Button_User (45) // PC13. B1. When push the button, the I/O is LOW value.#define B1 (45)#define LED_User (5) // PA5. LD2. When the I/O is HIGH value, the LED is on.#define LD2 (5)
/* Exported macro ------------------------------------------------------------*//* Exported functions ------------------------------------------------------- */
#endif /* __GPIO_MAPPING_H */
/********************************END OF FILE***********************************/結語
這次簡單地分享了自己打的程式，不敢說自己的程式很完善、漂亮，但希望它有幫助到你。 如有問題或錯誤也歡迎提出討論！
注意，本文的內容過於老舊，不建議實際使用，僅保留以作為參考用。