Not working with Arduino Due

Hi. Tested your code with Arduino Due. I2C problem while reading EEPROM dump and other large registers. In MLX90640_I2CRead(), its seems like the startAddress (which will be updated every I2C_BUFFER_LENGTH) will not be recognized by the MLX90640. If you print out the resulting EEPROM dump (eeMLX90640), the first 32-bytes will be repeated over and over. Any suggestions?

Edit:
I2C Dump:
Start, h66 [ h33 | WR ], h24, h00, Stop
Start, h67 [ h33 | RD ], h00, h09, h00, hAD, h49, h9A, h00, h00, h20, h61, h00, h05, h03, h20, h03, hE0, h16, h0B, hA2, h29, h01, h85, h04, h99, h00, h00, h19, h01, h00, h00, h00, h00 NAK, Stop
Start, h66 [ h33 | WR ], h24, h10, Stop
Start, h67 [ h33 | RD ], h00, h09, h00, hAD, h49, h9A, h00, h00, h20, h61, h00, h05, h03, h20, h03, hE0, h16, h0B, hA2, h29, h01, h85, h04, h99, h00, h00, h19, h01, h00, h00, h00, h00 NAK, Stop
Start, h66 [ h33 | WR ], h24, h20, Stop
Start, h67 [ h33 | RD ], h00, h09, h00, hAD, h49, h9A, h00, h00, h20, h61, h00, h05, h03, h20, h03, hE0, h16, h0B, hA2, h29, h01, h85, h04, h99, h00, h00, h19, h01, h00, h00, h00, h00 NAK, Stop

Its seems like there is a "bug" in the Wire implementation of the Arduino Due. Even with Wire.endTransmission(false), a STOP instead of a Restart will be sent. Therefore I would recomend not using the Due for I2C related tasks.

Issue can be closed.

[nseidle]

A couple things come to mind:

• Are you using a bus pirate? The nomenclature looks that way. We've had extremely bad luck using the pirate to trouble shoot I2C calls. Use a logic analyzer instead. Namely, the way BP does multiple byte reads is super odd and we haven't figured out how to get it to read reliably.

• The 'bug' you describe seems odd. I haven't used the Due with the MLX90640 but what you describe is what I saw when I was first designing the library. My problem was that the MLX90640 does not auto-increment the address pointer. See this issue. Be sure you're writing the address to read from before doing a read.

Hi There

• It’s not a bus pirate but a similar product.
• The issue is definitively related to the Wire implementation in the Due. The exact same code runs fine with a Teensy 3.2 but fails with "Parameter extraction failed" or similar errors on the Due.

[cimba007]

I got the same problem on an https://github.com/rogerclarkmelbourne/Arduino_STM32 .. my EEPROM reads like

8 
A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 
A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 
A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 
A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 
A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 
A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 
A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 
A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 
A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 
A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 
A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 
A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 
A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 
A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 
A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 
A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 
A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 
A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 
A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 
A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 
A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 
A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 
A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 
A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 
A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 
A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 0 8 A7 799F 0 2061 4 320 3E0 81F 2C48 1186 499 0 188 0 

startAddress: 	2440	BytesRemaining: 	1536
	startAddress: 	2450	BytesRemaining: 	1504
	startAddress: 	2460	BytesRemaining: 	1472
	startAddress: 	2470	BytesRemaining: 	1440
	startAddress: 	2480	BytesRemaining: 	1408
	startAddress: 	2490	BytesRemaining: 	1376
	startAddress: 	24A0	BytesRemaining: 	1344
	startAddress: 	24B0	BytesRemaining: 	1312
	startAddress: 	24C0	BytesRemaining: 	1280
	startAddress: 	24D0	BytesRemaining: 	1248
	startAddress: 	24E0	BytesRemaining: 	1216
	startAddress: 	24F0	BytesRemaining: 	1184
	startAddress: 	2500	BytesRemaining: 	1152
	startAddress: 	2510	BytesRemaining: 	1120
	startAddress: 	2520	BytesRemaining: 	1088
	startAddress: 	2530	BytesRemaining: 	1056