RTOS/PROCESSOR-SDK-AM335X: PRU pinmux configuration

rafal Borkowski

Tool/software: TI-RTOS

Hi,

I'm trying to set the pinmux for pru0 and I got stuck. When I run bare metal project in gel file I cofigure

//CLK output = pr1_pru0_r30_5 (mode 5)
*((unsigned int*) 0x44E109a4) = AM335X_PIN_OUTPUT | 5;

this pin to be output and it will generate a basic clock signal. I start debug sesion connect arm cortex 8, run gel script, connect pru0, load program and run it. Evrything works fine until I try do the same thing with a TI-RTOS bios. How should I configure the pin mux? Do I have to do it by pinmux tool as described here http://www.ti.com/lit/an/sprac32/sprac32.pdf ? Maybe I need to use PRUICSS_pinMuxConfig(handle, 0x0); but I dont know how to use this function? Cos when i try it by gel file it dosent work.

over 8 years ago

0 Biser Gatchev-XID over 8 years ago

TI__Guru**** 393215 points

The RTOS team have been notified. They will respond here.

0 Garrett Ding over 8 years ago in reply to Biser Gatchev-XID

TI__Mastermind 43296 points

rafal,

Using pinmux tool as described in the sprac32.pdf to generate your board/application specific pin mux is always recommended. If the CLK output pin you listed is the only change with default, you can try to add the configuration after Board_init(), e.g.

Board_initCfg cfg = BOARD_INIT_UART_STDIO | BOARD_INIT_PINMUX_CONFIG | BOARD_INIT_MODULE_CLOCK;
boardInitStatus = Board_init(cfg);
*((unsigned int*) 0x44E109a4) = AM335X_PIN_OUTPUT | 5;

The setting in GEL file is overwritten by Board_init( ).

Regards,
Garrett

0 rafal Borkowski over 8 years ago in reply to Garrett Ding

Intellectual 650 points

Ty for your respone. I had BOARD_INIT_PINMUX_CONFIG | BOARD_INIT_ICSS_PINMUX in my Board_initCfg settings. When I delete one of theme everything works fine.

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RTOS/PROCESSOR-SDK-AM335X: PRU pinmux configuration