ADC of zephyr

[Jason]

Hi,

I am working on the nrf5340 with zephyr (NCS 1.7.1), I need to monitor the voltage of the battery, in the beginning, I used the ADC API of zephyr, and it works well, but the zephyr API doesn't seem to provide API to close the ADC, so I have to switch to nrfx_saadc API, and I got a few examples of its usage here:

• Example code for SAADC in simple blocking mode
• Example code for SAADC in simple mode with IRQs
• Example code for SAADC in advanced mode with IRQs

The issue is as below:

Only the "simple booking mode" works, the other two mode doesn't work, the system hangs after nrfx_saadc_mode_trigger() is executed, It appears the “nrfx saadc event handler” is not working properly.

the ADC config of prj.conf as below, am I missing anything?

CONFIG_ADC=y

CONFIG_ADC_ASYNC=y

CONFIG_ADC_NRFX_SAADC=y

CONFIG_NRFX_SAADC=y

Thanks!

Kind regards

[sredaley]

Can you detail your fix here? I think I'm running into the same issue. I cannot get the IRQ based mode to run. When including the IRQ_Connect line I get an error and cannot build.

[Jason]

No any other details, just add "IRQ_CONNECT(NRFX_IRQ_NUMBER_GET(NRF_SAADC), 1, nrfx_isr, nrfx_saadc_irq_handler, 0);"

before  

"nrfx_saadc_init"