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ADS1299EEGFE-PDK: ads1299 lead-off (data stream can not read LOFF_STATP reg value)

Part Number: ADS1299EEGFE-PDK
Other Parts Discussed in Thread: ADS1299

If  only read LOFF_STATP  LOFF_STATN reg value is 0X0C 0x0c .

but when i read the data the status 24 bit has always been c00000

MY REGIST MAP

#define ADS1299_REGDEFAULT_CONFIG1 0xF6 
#define ADS1299_REGDEFAULT_CONFIG2 0xC0
#define ADS1299_REGDEFAULT_CONFIG3 0xE1
#define ADS1299_REGDEFAULT_LOFF 0x00
#define ADS1299_REGDEFAULT_CH1SET 0xE0 
#define ADS1299_REGDEFAULT_CH2SET 0x60 
#define ADS1299_REGDEFAULT_CH3SET 0x60
#define ADS1299_REGDEFAULT_CH4SET 0x60
#define ADS1299_REGDEFAULT_CH5SET 0xE0 
#define ADS1299_REGDEFAULT_CH6SET 0xE0
#define ADS1299_REGDEFAULT_CH7SET 0xE0
#define ADS1299_REGDEFAULT_CH8SET 0xE0
#define ADS1299_REGDEFAULT_BIAS_SENSP 0x00
#define ADS1299_REGDEFAULT_BIAS_SENSN 0x00
#define ADS1299_REGDEFAULT_LOFF_SENSP 0x0E
#define ADS1299_REGDEFAULT_LOFF_SENSN 0x0E
#define ADS1299_REGDEFAULT_LOFF_FLIP 0x00
#define ADS1299_REGDEFAULT_LOFF_STATP 0x00
#define ADS1299_REGDEFAULT_LOFF_STATN 0x00
#define ADS1299_REGDEFAULT_GPIO 0x00
#define ADS1299_REGDEFAULT_MISC1 0x00
#define ADS1299_REGDEFAULT_MISC2 0x00
#define ADS1299_REGDEFAULT_CONFIG4 0x02

WHEN I ues ADS1299EEG-FE the same reg every thing is ok.But when i use my code.The problem arises.

  • Hi ZhengYu,

    Welcome to the E2E forum !!!

    The current LOFF_STATP and LOFF_STATN registers value should be embedded as a part of the output data stream. Is it possible to scope the DOUT pin during the leadoff condition when running your software? I can also verify the same on the ADS1299EEG-FE for verification.

    Thanks

    -TC