137 The function will write or read data to or from that buffers depending 138 on whether the I2CMRD flag is set in a particular message or not. 139 The slave address and whether to use ten bit address mode has to be 140 set in each message, overriding the values set with the above ioctl's.
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| #include<unistd.h> |
| #include<fcntl.h> |
| #include<sys/ioctl.h> |
| #include<linux/i2c-dev.h> |
| classi2cReadWrite { |
| public: |
| int file_i2c; |
| unsignedchar buffer[60]; |
| int length=2; |
| voidsetup(char * id){//'/dev/i2c-1' |
| char *filename = id; |
| if ((file_i2c = open(filename, O_RDWR)) < 0) { |
| printf('Failed to open the i2c bus'); |
| return; |
| } |
| int addr = 0x5a; |
| if (ioctl(file_i2c, I2C_SLAVE, addr) < 0) { |
| printf('Failed to acquire bus access and/or talk to slave.n'); |
| return; |
| } |
| } |
| string readi2cData(){ |
| string res; |
| if (read(file_i2c, buffer, length) != length) { |
| printf('Failed to read from the i2c bus.n'); |
| } |
| else { |
| printf('Data read: %sn', buffer); |
| } |
| return res; |
| } |
| voidwriteBytes(){ |
| buffer[0] = 0x01; |
| buffer[1] = 0x02; |
| if (write(file_i2c, buffer, length) != length) { |
| printf('Failed to write to the i2c bus.n'); |
| } |
| } |
| }; |
Close Function
