uint8_t TwoWire::requestFrom(uint8_t address, uint8_t quantity, uint8_t sendStop)
{
if (quantity > BUFFER_LENGTH)
quantity = BUFFER_LENGTH;
/* Set slave address via ioctl */
i2c_setslave(i2c_fd, address);
// if(i2c_transfer) {
// /* Need to perform a combined read/write operation
// */
// i2c_transfer = 0;
// if (sendStop == false)
// return 0;
// i2c_add_to_buf(address, 1, rxBuffer, quantity);
// if (!i2c_readwrite(i2c_fd)) {
// rxBufferIndex = 0;
// rxBufferLength = quantity;
// i2c_transfer = 0;
// return quantity;
// } else
// return 0;
// }
if (i2c_readbytes(i2c_fd, rxBuffer, quantity) < 0)
return 0;
// set rx buffer iterator vars
rxBufferIndex = 0;
rxBufferLength = quantity;
return quantity;
}
void DFTwoWire::beginTransmission(uint8_t address)
{
if (i2c_fd < 0 || adapter_nr < 0)
return;
/* set slave address via ioctl in case we need to perform terminating
* write operation
*/
i2c_setslave(i2c_fd, address);
// save address of target and empty buffer
txAddress = address;
txBufferLength = 0;
}