Can I set the nrf51822 spis miso pin as output when there is only one spi slave and one spi master on the bus.

[cgha]

My hardware only has one spi slave and one spi master. So can I just set the spi slave miso pin as output in spis_init function? If can not, can I set the pull down resistor on the slave miso pin on spis_init?

[awneil]

Is the nRF51822 the slave or the master?

Or is this two nRF51822s connected by SPI - so one is slave, and the other is master?

[cgha]

nrf51822 is spi slave, and the spi master is another 8bit mcu(with miso pin set as input and no pull).

[awneil]

https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v12.3.0/spi_slave_example.html

[cgha]

Thanks for your information, but I think it does not help my question. In the sample code, miso pin has no pull, and this may put miso in float state.