TMS320F280041: Ramp compensation for inverted analog input

philto

Part Number: TMS320F280041

Is there a way to invert the ramp compensation function of the analog comparators? Our current signal fed into the comparator is bipolar (zero at VCCA / 2), and we need ramp compensation for both positive and negative half cycles.

over 5 years ago

0 Frank Ankapong over 5 years ago

TI__Mastermind 28275 points

Hi Philto,

The ramp generator only counts down. However, if you want the compdac to sweep up instead of down, you might be able to achieve this through other means. The idea is: instead of driving the compdac from the ramp generator, you setup the dma to transfer a sequential list of values to the compdac that counts up. You can use the cpu timer to trigger the dma transfers 1 by 1.

0 Frank Ankapong over 5 years ago

TI__Mastermind 28275 points

Hi Philto,

Do you have anymore questions on this?

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TMS320F280041: Ramp compensation for inverted analog input