2015-11-28 10:06 AM
Hello,
I have a question about voltage reference of DAC on STM32f407. Is it possible to change voltage reference of the internal DAC at 0 to 2.5V.And the second question: is it possible to programming this change with step of 0.1V or I must use external voltage reference.2015-11-28 01:03 PM
Pretty sure the answer is no.
The device, as I recall, uses the external +VREF (or VDDA) for the DAC in the same fashion as the ADC. You can bench the ADC against the internal reference, but it is is not 'the reference'2015-11-28 01:14 PM
I want to increase/decrease signal from DAC through TFT button, without using mechanical buttons. Is there a way to do this?
2015-11-28 01:40 PM
Ok, so wouldn't you just scale the value you wrote to the DAC's register?
Assuming a 3V VREF, a value between 0-3V in 1/4096 th increments.2015-11-28 01:58 PM
I never thought about this way. I'll try, but I think that is the answer.
Thank you for help.