建筑建设规范网站,做盗版网站引流,潍坊+网站建设,济南做网站设计I2C-Tools的交叉编译 tar xvf i2c-tools-4.2.tar.xz 首先解压下压缩包 cd i2c-tools-4.2 进入 i2c-tools-4.2目录 make USE_STATIC_LIB1 执行 make 将i2cset ,i2cget ,i2cdump,i2cdetect,i2ctransfer放到板子上 命令直接操作IIC设备
命令行直接操作iic向AP3216C传感器获取数据…I2C-Tools的交叉编译 tar xvf i2c-tools-4.2.tar.xz 首先解压下压缩包 cd i2c-tools-4.2 进入 i2c-tools-4.2目录 make USE_STATIC_LIB1 执行 make 将i2cset ,i2cget ,i2cdump,i2cdetect,i2ctransfer放到板子上 命令直接操作IIC设备
命令行直接操作iic向AP3216C传感器获取数据
基于 SMBus
i2cset -f -y 0 0x1e 0 0x4 向0号总线的0x1e芯片地址的0号地址寄存器写入0x4 i2cset -f -y 0 0x1e 0 0x3 向0号总线的0x1e芯片地址的0号地址寄存器写入0x3 i2cget -f -y 0 0x1e 0xc 从0号总线的0x1e芯片地址的0xc号地址寄存器读一个字节 i2cget -f -y -w 0 0x1e 0xc 从0号总线的0x1e芯片地址的0xc号地址寄存器读两个字节
基于 I2C
i2ctransfer -f -y 0 w20x1e 0 0x4 向0号总线的0x1e芯片地址的0号地址寄存器写入0x4 w2表示向0x1e芯片地址写入两个字节00x4 i2ctransfer -f -y 0 w20x1e 0 0x3 向0号总线的0x1e芯片地址的0号地址寄存器写入0x3 i2ctransfer -f -y 0 w10x1e 0xc r2 从0号总线的0x1e芯片地址的0xc号地址寄存器读两个字节 r2表示从 0x1e芯片地址0xc地址读寄存器读取两个字节 i2ctransfer -f -y 0 w10x1e 0xe r2 从0号总线的0x1e芯片地址的0xe号地址寄存器读两个字节
编写程序访问AP3216C
AP3216C 是红外、光强、距离三合一的传感器,以读出光强、距离值为例
程序 #include sys/ioctl.h
#include errno.h
#include string.h
#include stdio.h
#include stdlib.h
#include unistd.h
#include linux/i2c.h
#include linux/i2c-dev.h
#include i2c/smbus.h
#include i2cbusses.h
#include time.h/* ./AP3216C i2c_bus_number light * ./AP3216C i2c_bus_number distance */int main(int argc, char **argv)
{unsigned char dev_addr 0x1e;unsigned char light_addr[2] {0x0c,0x0d};unsigned char distance_addr[2] {0x0e,0x0f};unsigned char buf[32];int file;char filename[20];unsigned char *str;int ret;struct timespec req;if (argc ! 3 ){printf(Usage:\n);printf( read AP3216C: %s i2c_bus_number light/distance \n, argv[0]);return -1;}file open_i2c_dev(argv[1][0]-0, filename, sizeof(filename), 0);if (file 0){printf(cant open %s\n, filename);return -1;}if (set_slave_addr(file, dev_addr, 1)){printf(cant set_slave_addr\n);return -1;}ret i2c_smbus_write_byte_data(file, 0, 0x04);ret i2c_smbus_write_byte_data(file, 0, 0x03);sleep(0.5);if (!strcmp(argv[2],light)){//ret i2c_smbus_read_i2c_block_data(file, light_addr[1], 2, buf);ret i2c_smbus_read_i2c_block_data(file, light_addr[0], 1, buf[0]);ret i2c_smbus_read_i2c_block_data(file, light_addr[1], 1, buf[1]);if (ret 0){printf(i2c_smbus_read_i2c_block_data err\n);return -1;}printf(as:%d\r\n,buf[0]);printf(ass:%d\r\n,buf[1]);printf(light: 0x%x%x\n, buf[0],buf[1]);}else if(!strcmp(argv[2],distance)){// readret i2c_smbus_read_i2c_block_data(file, distance_addr[0], 1, buf[0]);ret i2c_smbus_read_i2c_block_data(file, distance_addr[1], 1, buf[1]);if (ret 0){printf(i2c_smbus_read_i2c_block_data err\n);return -1;}printf(distance: 0x%x%x\n, buf[0],buf[1]);}return 0;}
