SPI DOUT/DRDY multiple pin usage

[Pepam]

Hi,

Working with ads1220 which runs on SPI. There standard SPI pins - dout, din, sclk, drdy. In its datasheet there is written it is possible to merge dout with drdy to indicate new data are available. How to configure gpiote to run event handler when new data are available? Thank

using SDK15.2. , Segger embedded studio 

[Jørgen Holmefjord]

Hi,

There is an example in the SDK showing exactly how to do this. Please have a look at the Pin Change Interrupt Example.

Best regards,
Jørgen

[Turbo J]

The Ti ADS1220 offers DRDY on a separate pin - connecting this to any GPIO is much simpler than trying to dual-use MISO.

Basically you would need to reconfigure the I/O pin from "pin sense" to "SPI (M)" and back each time you talk to the ADC.