Other Parts Discussed in Thread: ADS1262
Hello,
I am using the ADS1263 with a clock of 4.42368 MHz running at 400 SPS and SYNC4. This should give a sampling rate of 240 Hz.The processor I use is STM32F437cortex M4. I tied the DRDY line to one of the input pins that can be polled. I also connected the 4.4 MHz clock as an external inputs to the processor TIMER4 - so I can generate an interrupt at 240 Hz that should be synchronized to the DRDY line.
But when I try to run it with the TIMER4 interrupt and poll the DRDY line I get a lot of samples that are not ready. If I read and save only the new data it looks like the sampling rate is only ~ 186 Hz (I can see it by applying a 3 Hz signal as an input). I actually had to increase the sampling rate to 1200 SPS (720 Hz in my system) to get all the data as new.
Did anybody see something like that?
Did I miss something in the configuration?
Thanks