SPI CS0 problem on AM3359 ICE V2

Viktors Snicarevs

Other Parts Discussed in Thread: SYSBIOS, AM3359

Hi,

I am trying to set up master SPI single channel communication using functions from starterware while running sysbios. I am using CCS 5.5.0.00077 and am335x sysbios sdk 1.1.0.3 on AM3359 ICE V2.

I am looking on outputs on scope and while SPI1_SCLK and SPI1_D0 are doing what they are supposed to do, SPI1_CS0 is staying low at all times.

Changing polarity or trying to run multichannel mode cannot make it to do anything but stay low.

I need to have 4 wire interface. Could you please advice me on what could go wrong.

over 11 years ago

0 Biser Gatchev-XID over 11 years ago

TI__Guru**** 393215 points

Moving this to the Starterware forum.

0 Vinesh Balan over 11 years ago

TI__Expert 7360 points

Hello,

Are you using the os_driver/platform libraries from the SDK?

Can you please crosscheck if the pinmux of SPI1_CS0 is set to the correct mode?

Regards,
Vinesh

0 Viktors Snicarevs over 11 years ago in reply to Vinesh Balan

Prodigy 40 points

Hi Vinesh,

I am using libraries from sdk\os_drivers\src

The same functions which are used in examples,

I use default pinmux:

PinMuxConfig(iceMux);
PinMuxConfig(ice_v1Mux);

in which I have found:

{ 0x099c , 7 , AM335X_PIN_OUTPUT }, // spi1_cs0_mux4: HVS SPI1 CS in GPIO mode

I am not sure if it is what it should be.

0 Viktors Snicarevs over 11 years ago in reply to Viktors Snicarevs

Prodigy 40 points

Changing it to

{ 0x099c , 3 , AM335X_PIN_OUTPUT }, // spi1_cs0_mux4: HVS SPI1 CS in GPIO mode

solved the problem.

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SPI CS0 problem on AM3359 ICE V2