Forum Discussion
Honored ContributorMAX10 TSD problem (CH 17 ADC)
Hi,
I am working on temperature sensing diode(TSD of MAX10 SAU169C8GES). I am getting value 57 (decimal) on the channel number 17 always. f = 10 MHz external VRef = 2.5V Mode = Standard sequencer with external sample storage Seq Slot = 1 with TSD loaded Maybe I have a problem with my code. Please check it and if possible please provide me a working code example (VHDL). Thanks10 Replies
Altera_ForumPlease read MAX10 Device Handbook for more detailed information and compare what you have with that is written.
- Altera_Forum
Thanks Alex... but I read that handbook already and wrote that code accordingly. Interesting thing is that all other channels are working properly but TSD is showing constant value. This is the problem!!!
- Altera_Forum
if it works correctly than you expect values like in temprature conversion code table.
but what is value for channel counts in handbook? for U169 it is reported 8 and device has only one ADC. but figures contain 16... and documents send us to device overview for particular device part number. i think 'up to' and 'equal to' is not equivavalent and putting in technical documentation phrases for advertisement presentation should be strictly prohibited - Altera_Forum
single supply devices have only one ADC and it has 16 dual funtional inputs, 1 dedicated analog input and one temperature sensor. In total 17 channels and one TSD.
dual supply devices have two ADCs but the no. of channels are almost same. I dont know why they did it like that. But my concern is to run the TSD now. I am stuck here. - Altera_Forum
okay...
you can turn off all channels except TSD to check functionality. You can open pin planner for you device and check bank 1A - 8 pins. Then you need to check ADC IP parameters that not more than 10 channels = 1dedicated analog + 8 dual function + 1tsd - Altera_Forum
I just read values of TSD... it is running with single cycle ADC conversion configuration perfectly. but with continuous ADC conversion it is giving problem.
- Altera_Forum
ok. could you provide how sequencer is parametrized in ADC IP? Are there any warning or errors in IP wizard?
- Altera_Forum
very simple... I change nothing in IP. but I write in my code "sequencer_csr_writedata = X"0000_0003"". by doing this you are configuring ADC as single cycle conversion. you can consult it from handbook.
- Altera_Forum
great, perhaps value sequencer_csr_writedata <= X"1" for sequencer good enough to run continous
But you should consider calibration cycle when changing from temprature to normal sampling... but I advise to recheck sequencer, for disabling channels from 9 to 16 for U169 defice. in the sequencer you can put TSD channel is slot only once(twice, thrice) in the middle of sequence and fill others slots for your signals, i suggest your use all 64 slots available. - Altera_Forum
I'm having a similar issue. Do you remember how you solved this?
