求助_mma8652 加速度计 数据读取问题
在树莓派上想读取mma8652数据 没成功，各轴数据都显示255，参数设置也变过还是没行。代码如下：
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <linux/i2c-dev.h>
#include "wiringPi.h"
#include "wiringPiI2C.h"
int fd;
unsigned int X_M,X_L,Y_M,Y_L,Z_M,Z_L = 0;
int st =0;
long int axis(){
//int wiringPiI2CReadReg8 (int fd, int reg);
/* do{
st = wiringPiI2CReadReg8(fd,0x00);
}while( st & 0x07 == 0x00); //reg00crc check
*/
X_M = wiringPiI2CReadReg8 (fd, 0x01); //OUT_X_MSB
printf("X_M = %d \n", X_M);
X_L = wiringPiI2CReadReg8 (fd, 0x02); //OUT_X_LSB
printf("X_L = %d \n", X_L);
Y_M = wiringPiI2CReadReg8 (fd, 0x03); //OUT_Y_MSB
printf("Y_M = %d \n", Y_M);
Y_L = wiringPiI2CReadReg8 (fd, 0x04); //OUT_Y_LSB
printf("Y_L = %d \n", Y_L);
Z_M = wiringPiI2CReadReg8 (fd, 0x05); //OUT_Z_MSB
printf("Z_M = %d \n", Z_M);
Z_L = wiringPiI2CReadReg8 (fd, 0x06); //OUT_Z_LSB
printf("Z_L = %d \n", Z_L);
}
int main(){
if (wiringPiSetup () == -1) return 1;
fd = wiringPiI2CSetup(0x1d);
if (fd <0 )
{
printf(" Unable to initialise I2C: \n");
return -1;
}
//int wiringPiI2CWriteReg8 (int fd, int reg, int data) ;
wiringPiI2CWriteReg8 (fd,0x2a, (wiringPiI2CReadReg8(fd,0x2a)|0x01)); //CTRL1 activemode
usleep(1);
while(1){
//usleep(1000);
axis();
usleep(500000);
}
return 0;
} 求大神帮忙看看
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