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ADS1261EVM: how to use start pin collect data

Part Number: ADS1261EVM

hi everyone:

    We are using the ads1261EVM evaluation board for functional evaluation, which needs to use the external trigger single acquisition mode. We have checked all the ways to use the evaluation software, but there is no way to know how to configure it.
At present, the script configuration of holdstart 1 can basically synchronize the start pin signal with the drdy signal at one shot mode, but when the collect command is used to collect data, it will cause stalling. It should be because the method of obtaining data is still to send the start command via spi when this command is used. Is there a way to turn off sending the start command via spi? In addition, using the rddata command can read the adc data once, but cannot read continuously to acquire the signal

  • Hi jinghua chen,

    I am confused what you are trying to accomplish: the START pin on the ADS1261EVM is pulled high through a 100kohm resistor, which means the START behavior is only controlled by the software / GUI.

    Also, the GUI is not intended for data streaming, which might explain why "it will cause stalling." If you want to stream data from the ADC, you will need to write your own firmware and connect to the ADC communication signals through the J6 header


  • Ok, I get it. If there is an external trigger for oneshot mode and the data can be collected, it will speed up the evaluation. If not, we will have to write the firmware ourselves.

    At present, the rdy signal of adc is used to trigger the synchronization signal to collect the relevant signal, which can also be realized, but the period is related to the data output rate of adc

  • Hi jinghua chen,

    I am glad we could help resolve your issue quickly. If you have additional questions, please start a new thread and we will support you there