MQX Software SolutionsのトピックRe: SPI2 CS MQX3.7 question

SPI2 CS MQX3.7 question

Belen — Mon, 04 Jul 2011 19:06:12 GMT

Does anybody know how I can set SPI CS1 (PTD15 for Kinetis K60)?

I am using IO_IOCTL_SPI_SET_CS but I don't know the correct value for the param.

Thank you,

Belén.

PetrM — Mon, 11 Jul 2011 20:42:12 GMT

Hello, this should do it:

param = SPI_PUSHR_PCS(1 << 1);

ioctl (spi_fd, IO_IOCTL_SPI_SET_CS, &param);

The parameter type of this IOCTL command always corresponds to the one in the BSP SPI init structure (init_spi.c).

Regards,

PetrM

Belen — Mon, 18 Jul 2011 15:41:17 GMT

Thank you very much.

It works but my problem now is that I can't unset CS. I tried with:

param = SPI_PUSHR_PCS(1 << 1);
ioctl (spifd, IO_IOCTL_SPI_FLUSH_DEASSERT_CS, &param);

but it doesn't work. Any suggestions?

Regards,

Belén.

PetrM — Mon, 01 Aug 2011 15:49:03 GMT

Hello,

to deassert CS simply call fflush (spi_fd) or IO_IOCTL_FLUSH_OUTPUT command.

Regards,

PetrM