TMS32C5535 SPI (slave) in interrupt mode

Rajaram Lakade

Other Parts Discussed in Thread: TMS320C5535

HI,

I want to use TMS320C5535 SPI in interrupt mode ( 32 bit Read/write) which is interfaced with ADC and configured for 20MHz. expected to read at 16KSPS.

The SPI 32 bit read/write works in polling mode but it introduces a gap of few microseconds in between consecutive Rx/Tx ( in case of multiple word frame read/write)

Initially I faced issue with 32 bit read/write and I got it working by modifying "csl_spi.c" for 32 bit R/W and by clearing data reg's before reading.

Regards,

Rajaram

over 12 years ago

0 Steve Tsang over 12 years ago

TI__Mastermind 23785 points

The SPI_open function supports both polling and interrupt mode. Have you tried that setting?

SPI_HwMode csNum;

SPI_OperMode opMode(Polling/Interrupt)

...

hSpi = SPI_open(SPI_HwMode csNum, SPI_OperMode opMode);

Regards.

0 Rajaram Lakade over 12 years ago in reply to Steve Tsang

Prodigy 135 points

Thanks Steve,

I saw API for setting Interrupt mode. I am not sure what all configuration need to get it working e.g interrupt dispatcher, if I get sample code like CSL example for SPI interrupt mode it will be helpful.

Regards,

Rajaram

0 Steve Tsang over 12 years ago in reply to Rajaram Lakade

TI__Mastermind 23785 points

Have you tried using the interrupt mode instead of piolling? It shall work.

Regards.

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TMS32C5535 SPI (slave) in interrupt mode