AM335x PRU R30 does not work

user1862029

Other Parts Discussed in Thread: AM3359

I toggle GPIO3_20 through PRU. If I set mode 7 and toggle it in PRU, it outputed wave,ok. But all the same but set it to mode 5, that is, to functioned as PRU0_R30_, then no wave. Obviously PRU definitely was running properly.

over 10 years ago

0 Biser Gatchev-XID over 10 years ago

TI__Guru**** 393215 points

What processor is this? What software do you use?

0 user1862029 over 10 years ago in reply to Biser Gatchev-XID

Prodigy 80 points

Am3359, ccs6

0 user1862029 over 10 years ago in reply to Biser Gatchev-XID

Prodigy 80 points

Obviously PRU running, and I use code like: _R30 ^= GPIO, GPIO assigned 0x000f first. Actually the codes copied from the TI demo. If set mode 7, I used HWREG macro , and wave ok.

0 Biser Gatchev-XID over 10 years ago in reply to user1862029

TI__Guru**** 393215 points

The pin which is GPIO3_20 in Mode 7 is PRU0 R30_6 in Mode 5. To toggle this pin with your instruction _R30 ^= GPIO you will need to assign bit 6 of GPIO to 1 (GPIO=0x004F).

0 user1862029 over 10 years ago in reply to Biser Gatchev-XID

Prodigy 80 points

Thank you very much for your kind reply. I will try it later.

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AM335x PRU R30 does not work