The IWRL1432 device includes
provision for an ADC service for user application, where the GPADC engine present
inside the device can be used to measure up to two external voltages. The GPADC1,
and GPADC2 pins are used for this purpose.
- GPADC itself is controlled by TI firmware running
inside the FEC subsystem and access to it for
customer’s external voltage monitoring purpose is
via ‘APPSS’ calls routed to the FEC subsystem.
This API could be linked with the user application
running on APPSS Cortex M4F®.
- Device Firmware package (DFP) provides APIs to
configure and measure these signals. The API
allows configuring the settling time (number of
ADC samples to skip) and number of consecutive
samples to take. At the end of a frame, the
minimum, maximum and average of the readings will
be reported for each of the monitored
voltages.
GPADC structures are used for measuring the output of internal temperature sensors. The accuracy of these measurements is ±7°C.