I am investigating accessing an SPI serial data flash device from an app within QNX 650.

As an initial test I am simply trying to read the JEDEC id from the device, but I find that while the first read works 
OK the second and subsequent read returns 0's.

I know that these devices (N25Q128) requires a transition on the chip select pin to terminate a read and I expected the 
SPI-MASTER to do that on my behalf at the end of the call to "spi_cmdread()" ... but it doesn't seem to.

I have "bodged" it by following each call with an identical call to a different (and invalid) device ID (second 
parameter to "spi_cmdread()") and I can now read the JEDEC id as many times as I want within that instance of the 
program.

However, if I close the "/dev/spi0" device and terminate the program the next time it is run it reads back 0's and the 
only way to fix this is to slay and restart spi-master.

I believe I am configuring the device OK with "spi_setcfg()" and "spi_getdevinfo()" returns sensible info.

Has anyone done something similar or can offer some tips?
TIA
Bob