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ADS1299EEGFE-PDK: ADS1299EEGFE-PDK

Junzhe Zhang
Prodigy 130 points
Part Number: ADS1299EEGFE-PDK
Other Parts Discussed in Thread: ADS1299

Tool/software:

Hi,

I use STM32 to control ADS1299EVM. I want to use the internal square wave test function to test it. I successfully get the signal, but the waveform does not look uniform (the positive and negative periods of the square wave are not equal), and there is a certain offset, and the midpoint is not at 0. Why is this? I attached the image I acquired via matlab.

I attached the register values ​​I wrote.

ID  0x00  0x3E
CONFIG1  0x01  0xD6
CONFIG2  0x02  0xD0
CONFIG3  0x03  0xE0
LOFF  0x04  0x00
CH1SET  0x05  0x15
CH2SET  0x06  0xE5
CH3SET  0x07  0xE5
CH4SET  0x08  0xE5
CH5SET  0x09  0xE5
CH6SET  0x0A  0xE5
CH7SET  0x0B  0xE5
CH8SET  0x0C  0xE5
BIAS_SENSP  0x0D  0x00
BIAS_SENSN  0x0E  0x00
LOFF_SENSP  0x0F  0x00
LOFF_SENSN  0x10  0x00
LOFF_FLIP  0x11  0x00
LOFF_STATP  0x12  0x00
LOFF_STATN  0x13  0x00
GPIO  0x14  0x0F
MISC1  0x15  0x00
MISC2  0x16  0x00
CONFIG4  0x17  0x00

Regards,

Junzhe

  • 0
    TI__Prodigy 600 points

    Hi Junzhe,

    Thank you for your post and your interest in using our ADS1299.

    As I mentioned in your other post, due to increased demand for support directly with customers, we are limited on bandwidth at the moment.

    We will attempt to address your questions when possible, but please expect a delay of 2-3 weeks minimum. 

    Best,

    Katelyn