some question about Hsync and Vsync signal

king king

I use dm365 to output 408x240 lcd ,but it doesn't work.I use oscilloscope to measure the date signal ,Hsync and Vsync signal.

there's date signal,but the Hsync signal is always high and Vsync signal is always low.

I hope someone can help me.Thank u very much!

over 14 years ago

0 Marcus Cooksey over 14 years ago

TI__Genius 9510 points

The Hsync and Vsync signals are pinmuxed with the GPIO[83:84]. Be sure that the register that selects the pin function is set properly.

To select Hsync and Vsync function, set bit 16 of register 0x01C40004 [PINMUX1] to the value of 0.

For more information refer to section 9.12.3 of the ARM SS UG

http://focus.ti.com/general/docs/lit/getliterature.tsp?literatureNumber=sprufg5a&fileType=pdf

0 king king over 14 years ago in reply to Marcus Cooksey

Intellectual 650 points

Thank u .

I had set pinmux1&=0xffbef03f in borad-dm365-evm.c,the bit 16 is 0,but the Hsync signal is still high and Vsync signal is low.Is there any other reson make this happen?

0 Marcus Cooksey over 14 years ago in reply to king king

TI__Genius 9510 points

Can you detail what configuration you've done thus far (i.e. register settings)?

0 king king over 14 years ago in reply to Marcus Cooksey

Intellectual 650 points

The problem has solved.We didn't weld R189 and R190.

Thank U~~

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some question about Hsync and Vsync signal