[nRF51422] SPI Slave solution

[wizath]

Hello,

I'm using an external chip that decodes my RF transmission and outputs the data on two pins DAT, and CLK (data and clock). Currently I'm reading the data with GPIOTE, and was thinking about using SPI to collect the output.

SPI Slave uses CS pin to control the data gathering, so is there any method to "emulate" the chip select pin without need of physical pin connected ? I'm trying to lower the current consumption as much as possible and just need to catch several milliseconds of transmission.

[wizath]

Thanks for answer, now I'm using two shorted pins and it works.

But there is my next question. I'm using spi_slave example from Keil, and trying to read ~10 bits. The issue is that the SPI amountrx reg always shows 1, so the remaining 2 got lost? Is there any way to capture all the transmission? My buffers are uint8_t arrays.

The chip select pin is toggled about 1ms after the end of transmission.

[wizath]

Thanks for answer, the easiest way will be to change the master side transmission.