However, I get the same result for nOB= 1. The traces above are the same with any num Of Bytes value. Params = TWI_ReadByte(WIRE_INTERFACE) ĭBG_PRINTLN('Read_I2C_Values: Transaction completed successfully.') ĭBG_PRINTLN('Read_I2C_Values: Transaction nottacompleted.') DBG_PRINTLN('Read_I2C_Values: Byte Ready') Need to set STOP condition WHILE reading the last byte. This, of course, is a hack in my 50+ device I2C network.Īny ideas/suggestions? TWI_StartRead(WIRE_INTERFACE, i2c_addr, i2c_register, 1) I have resorted to supporting only 1 byte reads for the foreseeable future. I haven't been able to find a way to specify how the master (the Due) should respond for multiple sequential reads. It seems that the Arduino community has been driving in circles over this problem for years.

' Master Read with Multiple Data Bytes' (). I have found that a NACK is always generated after the 1st read by some unidentified mechanism, making multiple byte reads impossible.įor the desired protocol, see Figure 34-10. ' TWI Read Operation with Multiple Data Bytes with or without Internal Address' in the SAM3X8E datasheet seems out of reach. After some turmoil, I have retreated to the state where only 1 byte at a time may be read from a slave.įigure 34-20.

Arduino wire library internal register