Hi Michal, The & instead of | will write 0x00 to Register 1 as you stated. That is definitely an issue. The very first conversion after power-up will require the START command to be issued to start conversions, even if you place the ADS1220 into continuous conversion mode. In single-shot mode you would be required to issue the START command to start each conversion. The RDATA command will always send out the last completed conversion. You should add the CS high at the end of your readData function. If you monitor DRDY, you can just send out the SCLKs instead of issuing the RDATA command. The end of conversion is signaled by a transition of of high to low on DRDY. If you have any question regarding the timing of your loop or end of conversion I would suggest using the RDATA command. Best regards, Bob B
↧