[STM32F401-DISCO开发板]实验四、3轴加速度计L3GD20采样实验

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zhjb1 发布时间：2017-12-12 08:52

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本实验采用官方提供的案例程序，经过修改将数据显示在LCD屏幕上，为了省事，渐亮采用源码。改动不大，具体如下：
首先打开stm32f401_discovery.h文档，更改和增加以下内容：
定义led对象：
typedef enum
{
  LED4 = 0,
  LED3 = 1,
  LED5 = 2,
  LED6 = 3,
  LCDVDD = 4,
  LCDSDA = 5,
  LCDSCL = 6,
  LCDSRE = 7,
  LCDSRG = 8
} Led_TypeDef;
leds属性定义：
#define LEDn                            9
#define LED4_PIN                      GPIO_Pin_12
#define LED4_GPIO_PORT                GPIOD
#define LED4_GPIO_CLK                   RCC_AHB1Periph_GPIOD

#define LED3_PIN                      GPIO_Pin_13
#define LED3_GPIO_PORT                GPIOD
#define LED3_GPIO_CLK                   RCC_AHB1Periph_GPIOD

#define LED5_PIN                      GPIO_Pin_14
#define LED5_GPIO_PORT                GPIOD
#define LED5_GPIO_CLK                   RCC_AHB1Periph_GPIOD

#define LED6_PIN                      GPIO_Pin_15
#define LED6_GPIO_PORT                GPIOD
#define LED6_GPIO_CLK                   RCC_AHB1Periph_GPIOD
#define LCDVDD_PIN                      GPIO_Pin_7//此引脚第一位高电平，为ks0713专用
#define LCDVDD_GPIO_PORT                GPIOE
#define LCDVDD_GPIO_CLK                RCC_AHB1Periph_GPIOE
#define LCDSDA_PIN                      GPIO_Pin_15
#define LCDSDA_GPIO_PORT                GPIOE
#define LCDSDA_GPIO_CLK                RCC_AHB1Periph_GPIOE

#define LCDSCL_PIN                      GPIO_Pin_13
#define LCDSCL_GPIO_PORT                GPIOE
#define LCDSCL_GPIO_CLK                RCC_AHB1Periph_GPIOE

#define LCDSRG_PIN                      GPIO_Pin_11
#define LCDSRG_GPIO_PORT                GPIOE
#define LCDSRG_GPIO_CLK                RCC_AHB1Periph_GPIOE
#define LCDSRE_PIN                      GPIO_Pin_9
#define LCDSRE_GPIO_PORT                GPIOE
#define LCDSRE_GPIO_CLK                RCC_AHB1Periph_GPIOE
而后打开stm32f401_doscover.c，更改以下内容：
GPIO_TypeDef* GPIO_PORT[LEDn] = {LED4_GPIO_PORT,LED3_GPIO_PORT,LED5_GPIO_PORT,LED6_GPIO_PORT,LCDVDD_GPIO_PORT,LCDSDA_GPIO_PORT,LCDSCL_GPIO_PORT,LCDSRE_GPIO_PORT,LCDSRG_GPIO_PORT};
const uint16_t GPIO_PIN[LEDn] = {LED4_PIN, LED3_PIN, LED5_PIN,LED6_PIN,LCDVDD_PIN,LCDSDA_PIN,LCDSCL_PIN,LCDSRE_PIN,LCDSRG_PIN};
const uint32_t GPIO_CLK[LEDn] = {LED4_GPIO_CLK,LED3_GPIO_CLK,LED5_GPIO_CLK,LED6_GPIO_CLK,LCDVDD_GPIO_CLK,LCDSDA_GPIO_CLK,LCDSCL_GPIO_CLK,LCDSRE_GPIO_CLK,LCDSRG_GPIO_CLK};
之后打开主函数main.cpp
增加include文件：
#include "6903.h"
增加函数定义：
void delay(int counter);
void dispBase(void);
void dispMes(void);
void ioInit(void);
增加自定义变量：
int32_t jsq;
//float ;
int pdir0=1,pdir1=1,twAddr1=0xBC,twAddr2=0xBB,k=0,graX,graY,val0,val1,val2,val3,k;
增加4个函数：
//Delayer
void delay(int counter){
int i,j;
for(i=0;i<counter;i++){for(j=0;j<i;j++){;}}
}
//GPIO Initial
void ioInit(void){
STM_EVAL_LEDInit(LED3);
STM_EVAL_LEDInit(LED4);
STM_EVAL_LEDInit(LED5);
STM_EVAL_LEDInit(LED6);
STM_EVAL_LEDInit(LCDVDD);
STM_EVAL_LEDInit(LCDSDA);
STM_EVAL_LEDInit(LCDSCL);
STM_EVAL_LEDInit(LCDSRE);
STM_EVAL_LEDInit(LCDSRG);
STM_EVAL_LEDOn(LCDVDD);
}
//Display Base Meseger
void dispBase(void){
c2l(0,0,19);c2l(1,0,28);c2l(2,0,26);c2l(3,0,40);//JSQ:
c2l(0,1,16);c2l(1,1,33);c2l(2,1,40);//c2l(1,3,40);//GX:
c2l(9,1,16);c2l(10,1,34);c2l(11,1,40);//c2l(1,12,40);//GY:
c2l(0,2,16);c2l(1,2,35);c2l(2,2,40);//c2l(2,3,40);//PW0:
c2l(9,2,16);c2l(10,2,10);c2l(11,2,40);//c2l(2,12,40);//PW1:
//c2l(0,3,29);c2l(1,3,14);c2l(2,3,22);c2l(3,3,40);//TEM:
//c2l(9,3,17);c2l(10,3,30);c2l(11,3,22);c2l(12,3,40);//HUM:
}
//Display Messeg
void dispMes(void){
c2l(4,0,(jsq/1000000)%10);c2l(5,0,(jsq/100000)%10);c2l(6,0,(jsq/10000)%10);c2l(7,0,(jsq/1000)%10);//JSQ:
c2l(8,0,(jsq/100)%10);c2l(9,0,(jsq/10)%10);c2l(10,0,(jsq)%10);//JSQ:
if(val0>0)c2l(3,1,38);else c2l(3,1,39);val0=ABS(val0);
c2l(4,1,(val0/100)%10);c2l(5,1,(val0/10)%10);c2l(6,1,(val0)%10);//c2l(1,7,(val2)%10);//X
if(val1>0)c2l(12,1,38);else c2l(12,1,39);val1=ABS(val1);
c2l(13,1,(val1/100)%10);c2l(14,1,(val1/10)%10);c2l(15,1,(val1)%10);//c2l(1,16,(val3)%10);//Y
if(val2>0)c2l(3,2,38);else c2l(3,2,39);val2=ABS(val2);
c2l(4,2,(val2/100)%10);c2l(5,2,(val2/10)%10);c2l(6,2,(val2)%10);//c2l(2,7,(val0)%10);//Z
if(val3>0)c2l(12,2,38);else c2l(12,2,39);val3=ABS(val3);
c2l(13,2,(val3/100)%10);c2l(14,2,(val3/10)%10);c2l(15,2,(val3)%10);//c2l(2,16,(val1)%10);//第4个变量——实际永远为0
}

编译下载运行结果见视频:41-3轴加速度计L3GD20采样实验