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128 lines
3.2 KiB
128 lines
3.2 KiB
#include "i2c_ch1_pImpL.hpp"
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// some curious things https://www.john.geek.nz/2012/12/update-reading-data-from-a-bosch-bmp085-with-a-raspberry-pi/
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i2c_ch1_pImpL::i2c_ch1_pImpL(const uint8_t& mode, ErrorHandler* err)
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{
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errorHandling = err;
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char filename[20];
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errorHandling->addNewError(-1,__FILE__,"Unable to open device",KILL);
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errorHandling->addNewError(-2,__FILE__,"Unable to reach the device",KILL);
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errorHandling->addNewError(-3,__FILE__,"Unable to write to device",KILL);
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errorHandling->addNewError(-4,__FILE__,"Unable to read from device",KILL);
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snprintf(filename, 19, "/dev/i2c-%d", 1);
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deviceDescriptor = open(filename, O_RDWR);
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if (deviceDescriptor < 0) {
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errorHandling->handleError(-1,__FILE__);
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}
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}
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uint8_t i2c_ch1_pImpL::writeByte(const uint8_t& address, const uint8_t& data) // retuns 0 when a sucsessful transation ocures
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{
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if (ioctl(deviceDescriptor, I2C_SLAVE, address) < 0)
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{
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errorHandling->handleError(-2,__FILE__);
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}
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send_buffer[0] = data;
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if ((write(deviceDescriptor, send_buffer, 1)) != 1)
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{
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errorHandling->handleError(-3,__FILE__);
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}
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return 0;
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}
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uint8_t i2c_ch1_pImpL::readByte(const uint8_t& address, const uint8_t& reg)
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{
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if (ioctl(deviceDescriptor, I2C_SLAVE, address) < 0)
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{
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errorHandling->handleError(-2,__FILE__);
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}
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writeByte(address,reg); //Initiate a write to indicate the desired register to read
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if (read(deviceDescriptor, recieve_buffer, 1) != 1) // An then initare a read request of 1 byte
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{
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errorHandling->handleError(-4,__FILE__);
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}
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return recieve_buffer[0] ;
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}
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uint8_t i2c_ch1_pImpL::writeWord(const uint8_t& address, const uint8_t& reg, const uint8_t& data) // retuns 0 when a sucsessful transation ocures
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{
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if (ioctl(deviceDescriptor, I2C_SLAVE, address) < 0)
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{
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errorHandling->handleError(-2,__FILE__);
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}
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send_buffer[0] = reg;
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send_buffer[1] = data;
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if ((write(deviceDescriptor, send_buffer, 2)) != 2)
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{
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errorHandling->handleError(-3,__FILE__);
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}
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return 0;
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}
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uint8_t i2c_ch1_pImpL::writeWordWithReg(const uint8_t& address, const uint8_t& reg, const uint16_t& data) // retuns 0 when a sucsessful transation ocures
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{
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if (ioctl(deviceDescriptor, I2C_SLAVE, address) < 0)
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{
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errorHandling->handleError(-2,__FILE__);
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}
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send_buffer[0] = reg;
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send_buffer[1] = data >> 8;
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send_buffer[2] = data;
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if ((write(deviceDescriptor, send_buffer, 3)) != 3)
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{
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errorHandling->handleError(-3,__FILE__);
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}
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return 0;
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}
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uint16_t i2c_ch1_pImpL::readWord(const uint8_t& address, const uint8_t& reg)
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{
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uint16_t result = 0 ;
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if (ioctl(deviceDescriptor, I2C_SLAVE, address) < 0)
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{
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errorHandling->handleError(-2,__FILE__);
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}
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writeByte(address,reg); //Initiate a write to indicate the desired register to read
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if (read(deviceDescriptor, recieve_buffer, 2) != 2) // An then initare a read request of 2 bytes
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{
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errorHandling->handleError(-4,__FILE__);
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}
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result = (recieve_buffer[0] << 8) + recieve_buffer[1] ;
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return result ;
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}
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void i2c_ch1_pImpL::writeBuffer(const uint8_t& address, const uint8_t* buff, const uint8_t& len)
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{
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if(len > send_buffer_size){
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// TODO: implement error handling here!
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}
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if ((write(deviceDescriptor, send_buffer, len)) != len)
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{
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// TODO: implement error handling here!
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}
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}
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