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Discussion Groups | TMS320C54x | SPI mode for 5409
Technical discussions about the TI C54x DSPs (including the c5401, c5402, c5402a, c5404, c5407, c5409, c5409a, c5410, c5410a, c5416, c5420, c5421, c5441, c549, c5470 and c5471).
SPI mode for 5409 - nikhil rao - Jan 2 22:11:00 2001
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I am trying to do read and writes using the SPI mode on the MCBSP. I can see the correct signals (data, clk and fsx) for writes but for reads, clk toggles from 0 -> 1 and fsx toggles from 1->0 and then stays there, has anybody seen this ??? I am not using the DSK. Thanks, Nikhil |
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Re: SPI mode for 5409 - Author Unknown - Jan 3 7:17:00 2001
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Dear Nikhil, As you stated the FSX pin remains high continously.This might be because there are two modes in the serial port interface circuit depending the TXM bit in the SPC(serial port control register ) through which you can configure FSX pin as input or output. If configured as input the state depends on the device generating this signal. Try resetting this TXM bit in the SPC register. For reference you can go through the manual spru131c.pdf (Referene Manual Vol1-CPU & Peripherals). With Regards |
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