How to configure SPI CS

[linhaiboyy]

Hi,

I am working on MX6q,use linux kernel 3.0.35.When I send data,use the oscilloscope to view CS signal,why I fill the ECSPIx_CONREG[BURST LENGTH] can only send 8 bits ,16 bits or 32 bits one time.Now I want to send more data one time,and the CS is low power, until the data  is send,  the CS is high power.

[linhaiboyy]

Hi,

I am field TXCNT in register ECSPIx_TESTREG, I am send 4 byte one time,I can catch waveform. As follows,

But, I can not catch the CS is low  when send the 4 byte data. I am field TXCNT in register ECSPIx_TESTREG code,  As follows,

[linhaiboyy]

thanks for your help, I will try !

[linhaiboyy]

Hi,

I can not find where avoid TX FIFO become empty.Can you show it to me ?

[igorpadykov]

TXCNT in register ECSPIx_TESTREG.

[igorpadykov]

Hi

to avoid CS go high one needs to make algorithm

in such way so avoid TX FIFO become empty untill

all bits will be sent.

Best regards
igor
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