注意，本文的內容過於老舊，不建議實際使用，僅保留以作爲參考用。
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：
1/* Includes ------------------------------------------------------------------*/
2#include "GPIO_mapping.h"
3
4/* Private typedef -----------------------------------------------------------*/
5/* Private define ------------------------------------------------------------*/
6// Pin Mode and Speed
7#define OUT (0) // Output
8#define IN (1) // Input
9
10#define GPPP (0) // General purpose Push-Pull (Output)
11#define GPOD (1) // General purpose Open-Drain (Output)
12#define AFPP (2) // Alternate function Push-Pull (Output)
13#define AFOD (3) // Alternate function Open-Drain (Output)
14
15#define FL (0) // Floating (Input)
16#define AN (1) // Analog (Input)
17#define PD (2) // Pull-Down (Input)
18#define PU (3) // Pull-Up (Input)
19
20#define S2M (2) // 2MHz
21#define S10M (10) // 10MHz
22#define S50M (50) // 50MHz
23
24/* Private macro -------------------------------------------------------------*/
25/* Private variables ---------------------------------------------------------*/
26/* Private function prototypes -----------------------------------------------*/
27/* Private functions ---------------------------------------------------------*/
28
29/**
30 * @brief Config a pin mode and speed.
31 * @param PortPin: select a pin to set.
32 * This parameter should be: 0 ~ 79
33 * 0~15:PA0~PA15; 16~31:PB0~PB15; 32~47:PC0~PC15;
34 * 48~63:PD0~PD15; 64~79:PE0~PE15
35 * @param INout: Input or Output.
36 * This parameter should be: 0(Output) or 1(Input).
37 * @param Mode: Pin mode.
38 * This parameter should be: 0~3.
39 * 0: GPPP or FL.
40 * 1: GPOD or AN.
41 * 2: AFPP or PD.
42 * 3: AFOD or PU.
43 * @param Speed: Pin speed.
44 * This parameter should be: 2, 10 or 50.
45 * 2: 2MHz.
46 * 10: 10MHz.
47 * 50: 50MHz.
48 * @retval None
49 */
50void Pin_Mod(u8 PortPin, u8 INout, u8 Mode, u8 Speed)
51{
52 /* Structure Declarations */
53 GPIO_InitTypeDef GPIO_InitStructure;
54
55 // GPIO_Speed
56 switch(Speed)
57 {
58 case S2M: // S2M:2
59 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
60 break;
61 case S10M: // S10M:10
62 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
63 break;
64 case S50M: // S50M:50
65 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
66 break;
67 default:
68 break;
69 }
70
71 // GPIO_Mode
72 if(INout == OUT) // OUT:0
73 {
74 switch(Mode)
75 {
76 case GPPP: // GPPP:0
77 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
78 break;
79 case GPOD: // GPOD:1
80 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD;
81 break;
82 case AFPP: // AFPP:2
83 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
84 break;
85 case AFOD: // AFOD:3
86 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
87 break;
88 default:
89 break;
90 }
91 }
92 else if(INout == IN) // IN:1
93 {
94 switch(Mode)
95 {
96 case FL: // FL:0
97 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
98 break;
99 case AN: // AN:1
100 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
101 break;
102 case PD: // PD:2
103 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD;
104 break;
105 case PU: // PU:3
106 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
107 break;
108 default:
109 break;
110 }
111 }
112
113 // GPIO_Pin & GPIO_Init() function.
114 if(PortPin <= 15) // Port-A: 0~15
115 {
116 GPIO_InitStructure.GPIO_Pin = ((uint16_t)(0x0001 << PortPin));
117 GPIO_Init(GPIOA, &GPIO_InitStructure);
118 }
119 else if(PortPin <= 31) // Port-B: 16~31
120 {
121 GPIO_InitStructure.GPIO_Pin = ((uint16_t)(0x0001 << (PortPin - 16)));
122 GPIO_Init(GPIOB, &GPIO_InitStructure);
123 }
124 else if(PortPin <= 47) // Port-C: 32~47
125 {
126 GPIO_InitStructure.GPIO_Pin = ((uint16_t)(0x0001 << (PortPin - 32)));
127 GPIO_Init(GPIOC, &GPIO_InitStructure);
128 }
129 else if(PortPin <= 63) // Port-D: 48~63
130 {
131 GPIO_InitStructure.GPIO_Pin = ((uint16_t)(0x0001 << (PortPin - 48)));
132 GPIO_Init(GPIOD, &GPIO_InitStructure);
133 }
134 else if(PortPin <= 79) // Port-E: 64~79
135 {
136 GPIO_InitStructure.GPIO_Pin = ((uint16_t)(0x0001 << (PortPin - 64)));
137 GPIO_Init(GPIOE, &GPIO_InitStructure);
138 }
139 else /* Null */; // Out of range(0~79)
140}
141
142#undef OUT
143#undef IN
144
145#undef GPPP
146#undef GPOD
147#undef AFPP
148#undef AFOD
149
150#undef FL
151#undef AN
152#undef PD
153#undef PU
154
155#undef S2M
156#undef S10M
157#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：
1/* STM32 Nucleo-64 board */
2Pin_Mod(PA5, OUT, GPPP, S2M); // PA5: LED-user
3//GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
4//GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
5//GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
6//GPIO_Init(GPIOA, &GPIO_InitStructure);
7
8Pin_Mod(PC13, IN, FL, S2M); // PC13: Button-user
9//GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
10//GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
11//GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
12//GPIO_Init(GPIOC, &GPIO_InitStructure);
13
14/* USART */
15Pin_Mod(PA2, OUT, AFPP, S50M); // PA2: USART2_TX
16//GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
17//GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
18//GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
19//GPIO_Init(GPIOA, &GPIO_InitStructure);
20
21Pin_Mod(PA3, IN, FL, S50M); // PA3: USART2_RX
22//GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
23//GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
24//GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
25//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）
1/**
2 ******************************************************************************
3 * @file GPIO_mapping.h
4 * @author ZiTe
5 * @version V1.0.0
6 * @date 08-October-2019
7 * @brief Header for GPIO_Function.c module for STM32F103RB
8 ******************************************************************************
9 * @attention
10 *
11 * This file is used ONLY for STM32F103RB(STM32 Nucleo-64 board).
12 *
13 ******************************************************************************
14 */
15
16/* Define to prevent recursive inclusion -------------------------------------*/
17#ifndef __GPIO_MAPPING_H
18#define __GPIO_MAPPING_H
19
20/* Includes ------------------------------------------------------------------*/
21/* Exported types ------------------------------------------------------------*/
22/* Exported constants --------------------------------------------------------*/
23
24/* STM32 Pin(Morpho) */
25/*
26 * Default=Alternate functions Default
27 * MA=Main function(after reset)
28 * Remap=Alternate functions Remap
29 */
30
31// Port-A
32#define PA0 (0) // WKUP/USART2_CTS/ADC12_IN0/TIM2_CH1_ETR
33#define PA1 (1) // USART2_RTS/ADC12_IN1/TIM2_CH2
34#define PA2 (2) // USART2_TX/ADC12_IN2/TIM2_CH3
35#define PA3 (3) // USART2_RX/ADC12_IN3/TIM2_CH4
36#define PA4 (4) // SPI1_NSS/USART2_CK/ADC12_IN4
37#define PA5 (5) // SPI1_SCK/ADC12_IN5
38#define PA6 (6) // SPI1_MISO/ADC12_IN6/TIM3_CH1;Remap:TIM1_BKIN
39#define PA7 (7) // SPI1_MOSI/ADC12_IN7/TIM3_CH2;Remap:TIM1_CH1N
40#define PA8 (8) // USART1_CK/TIM1_CH1/MCO
41#define PA9 (9) // USART1_TX/TIM1_CH2
42#define PA10 (10) // USART1_RX/TIM1_CH3
43#define PA11 (11) // USART1_CTS/CANRX/USBDM/TIM1_CH4
44#define PA12 (12) // USART1_RTS/CANTX/USBDP/TIM1_ETR
45#define PA13 (13) // MA:JTMS/SWDIO;Remap:PA13
46#define PA14 (14) // MA:JTCK/SWCLK;Remap:PA14
47#define PA15 (15) // MA:JTDI;Remap:TIM2_CH1_ETR/ PA15/SPI1_NSS
48
49// Port-B
50#define PB0 (16) // ADC12_IN8/TIM3_CH3;Remap:TIM1_CH2N
51#define PB1 (17) // ADC12_IN9/TIM3_CH4;Remap:TIM1_CH3N
52#define PB2 (18) // MA:PB2/BOOT1
53#define PB3 (19) // MA:JTDO;Remap:TIM2_CH2/PB3/TRACESWO/SPI1_SCK
54#define PB4 (20) // MA:JNTRST;Remap:TIM3_CH1/PB4/SPI1_MISO
55#define PB5 (21) // I2C1_SMBAl;Remap:TIM3_CH2/SPI1_MOSI
56#define PB6 (22) // I2C1_SCL/TIM4_CH1;Remap:USART1_TX
57#define PB7 (23) // I2C1_SDA/TIM4_CH2;Remap:USART1_RX
58#define PB8 (24) // TIM4_CH3;Remap:I2C1_SCL/CANRX
59#define PB9 (25) // TIM4_CH4;Remap:I2C1_SDA/CANTX
60#define PB10 (26) // I2C2_SCL/USART3_TX;Remap:TIM2_CH3
61#define PB11 (27) // I2C2_SDA/USART3_RX;Remap:TIM2_CH4
62#define PB12 (28) // SPI2_NSS/I2C2_SMBAl/USART3_CK/TIM1_BKIN
63#define PB13 (29) // SPI2_SCK/USART3_CTS/TIM1_CH1N
64#define PB14 (30) // SPI2_MISO/USART3_RTS/TIM1_CH2N
65#define PB15 (31) // SPI2_MOSI/TIM1_CH3N
66
67// Port-C
68#define PC0 (32) //
69#define PC1 (33) //
70#define PC2 (34) //
71#define PC3 (35) //
72#define PC4 (36) //
73#define PC5 (37) //
74#define PC6 (38) //
75#define PC7 (39) //
76#define PC8 (40) //
77#define PC9 (41) //
78#define PC10 (42) //
79#define PC11 (43) //
80#define PC12 (44) //
81#define PC13 (45) //
82#define PC14 (46) //
83#define PC15 (47) //
84
85// Port-D
86#define PD0 (48) //
87#define PD1 (49) //
88#define PD2 (50) //
89#define PD3 (51) //
90#define PD4 (52) //
91#define PD5 (53) //
92#define PD6 (54) //
93#define PD7 (55) //
94#define PD8 (56) //
95#define PD9 (57) //
96#define PD10 (58) //
97#define PD11 (59) //
98#define PD12 (60) //
99#define PD13 (61) //
100#define PD14 (62) //
101#define PD15 (63) //
102
103// Port-E
104#define PE0 (64) //
105#define PE1 (65) //
106#define PE2 (66) //
107#define PE3 (67) //
108#define PE4 (68) //
109#define PE5 (69) //
110#define PE6 (70) //
111#define PE7 (71) //
112#define PE8 (72) //
113#define PE9 (73) //
114#define PE10 (74) //
115#define PE11 (75) //
116#define PE12 (76) //
117#define PE13 (77) //
118#define PE14 (78) //
119#define PE15 (79) //
120
121/* Arduino Pin */
122// Analog(CN8)
123#define A0 (0) // PA0
124#define A1 (1) // PA1
125#define A2 (4) // PA4
126#define A3 (16) // PB0
127#define A4 (33) // PC1(or PB9,change by solder bridges)
128#define A5 (32) // PC0(or PB8,change by solder bridges)
129
130// Digital(CN9)
131#define D0 (3) // PA3(USART2_RX)
132#define D1 (2) // PA2(USART2_TX)
133#define D2 (10) // PA10
134#define D3 (19) // PB3(PWM)
135#define D4 (21) // PB5
136#define D5 (20) // PB4(PWM)
137#define D6 (26) // PB10(PWM)
138#define D7 (8) // PA8
139
140// Digital(CN5)
141#define D8 (9) // PA9
142#define D9 (39) // PC7(PWM)
143#define D10 (22) // PB6(PWM/CS)
144#define D11 (7) // PA7(PWM/MOSI)
145#define D12 (6) // PA6(MISO)
146#define D13 (5) // PA5(SCK)
147#define D14 (25) // PB9(SDA)
148#define D15 (24) // PB8(SCL)
149
150/* STM32 Nucleo-64 board */
151#define Button_User (45) // PC13. B1. When push the button, the I/O is LOW value.
152#define B1 (45)
153#define LED_User (5) // PA5. LD2. When the I/O is HIGH value, the LED is on.
154#define LD2 (5)
155
156/* Exported macro ------------------------------------------------------------*/
157/* Exported functions ------------------------------------------------------- */
158
159#endif /* __GPIO_MAPPING_H */
160
161/********************************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，僅保留以作爲參考用。
留言可能不會立即顯示。若過了幾天仍未出現，請 Email 聯繫：）
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