Stellaris M4 Trigger ADC0 with PWM1

Josef Cupic

I am using the LM4f232H5QD Eval Board. I do not manage to trigger ADC0, Sequence0 with the downcounting event of PWM Module 1, Generator 2.

If I redirect the same PWM event to an interrupt and use the software trigger for the same ADC sequence, everything works fine.

So the general setup of PWM and ADC should be Ok. It's just that I somehow do not manage to trigger the sequence directly.

See the code on: http://pastebin.com/8YaBpHVy

over 13 years ago

0 cb1_mobile over 13 years ago

Guru 117855 points

Such behavior (or very near) has been earlier reported (and solved) this forum. Use the forum search function - if unsuccessful I'll find & assist late today...

Update: here's the link: http://e2e.ti.com/support/microcontrollers/stellaris_arm_cortex-m3_microcontroller/f/471/t/158612.aspx

Kindly read/review - see if this gets you closer...

0 Josef Cupic over 13 years ago in reply to cb1_mobile

Prodigy 70 points

Hi cb1_mobile

Thank you for the link, I have already considered this issue, see my code in the first post.

After a few test the state is as follows:

1. I manage to trigger the ADC0 Sequence0 from different PWM0 and PWM1 Generators.

2. I do not manage to trigger ADC0 Sequence0 from PWM1 Generator2.

This goes to an TI employee:

I wonder if this problem is just on my LM4F232H5QD Prototype Board or if it is more general?

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Stellaris M4 Trigger ADC0 with PWM1