GPIO 使用实例

1. 该函数库的目的就是在统一的敌方配置gpio，将配置的不同项放置在一个结构体内部
2. 没得io口使用一个枚举来定义一个gpio pin的别名

gpio输入实例

key.c

#include <stdio.h>
#include "key/bsp_key.h"
#include "./key/bsp_lib_input.h"	
static key_t keys[KEY_NUM]={{GPIOA,GPIO_PIN_5,RCC_APB2_PERIPH_GPIOA},
{GPIOA,GPIO_PIN_6,RCC_APB2_PERIPH_GPIOA},
{GPIOA,GPIO_PIN_7,RCC_APB2_PERIPH_GPIOA},};
/*key初始化
*/
void bsp_key_init (key_t *pkey)
{GPIO_InitType GPIO_InitStructure;/* Check the parameters */assert_param(IS_GPIO_ALL_PERIPH(pkey->gpiox));RCC_EnableAPB2PeriphClk(pkey->gpio_rcc, ENABLE);/* Configure the GPIO pin */if (pkey->pin <= GPIO_PIN_ALL){GPIO_InitStruct(&GPIO_InitStructure);GPIO_InitStructure.Pin        = pkey->pin;GPIO_InitStructure.GPIO_Current = GPIO_DC_12mA;GPIO_InitStructure.GPIO_Pull    = GPIO_No_Pull;GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_Input;GPIO_InitPeripheral(pkey->gpiox, &GPIO_InitStructure);}
}
/*key 按键状态读取
*/
uint8_t bsp_read_key(int id)
{key_t *pkey=NULL;if(KEY_NUM>id){pkey = keys+id;return GPIO_ReadInputDataBit(pkey->gpiox,pkey->pin);}return 0xff;
}static button btns[KEY_NUM];
void fn_button_down_handle(uint8_t btn_id);/*一键初始化所有LED
*/
void bsp_keys_init(void)
{for(int i=0;i<KEY_NUM;i++){bsp_key_init(keys+i);register_button(btns+i,i,Bit_RESET,bsp_read_key,BUTTON_DOWM,fn_button_down_handle);}
}void key_process(uint32_t tick_ms)
{buttons_process(tick_ms);
}

key.h

#ifndef _BSP_KEY_H_
#define _BSP_KEY_H_#include <stdint.h>
#include "n32l40x.h"typedef enum
{KEY1,KEY2,KEY3,KEY_NUM//key数量
}en_key_t;typedef struct
{GPIO_Module* gpiox;uint16_t pin;uint32_t gpio_rcc;
}key_t;/*一键初始化所有按键
*/
void bsp_keys_init(void);
/*按键状态读取
*/
uint8_t bsp_read_key(int id);void key_process(uint32_t tick_ms);#endif