Arduino Pro mini, broken Internal Test Signal
sss0sohrab
iran,mashhad
Hi. i Just Designed and finished my board (ADS1299 + ARduino Pro
mini(ATmega328) ) and every thing seems fine.i can read and write the
registers and i can get the correct data from noise measurement and
temperature sensor and i can change the gain of the channels but when i
want to set the channels for internal testing they return the positive
data of internal test signal and they don't toggle to negative data.in
other words in any case of test signal, all i get is a DC signal (but i
configure the register CONFIG2 with this 0b11010000) and channels
0b00000101....i don't know why they don't toggle and give me a square
signal...every other thing is normal.BTW i am using external
clock(2.048MHz) for ADS1299 and CLKSEL=0 (tied to GND). thank you for
reading this discussion.(here is a picture of what i get). the data are
in Microvolts and noise is -500uV so i get the correct amplitude of test
signal which in my case is 1.8V
mini(ATmega328) ) and every thing seems fine.i can read and write the
registers and i can get the correct data from noise measurement and
temperature sensor and i can change the gain of the channels but when i
want to set the channels for internal testing they return the positive
data of internal test signal and they don't toggle to negative data.in
other words in any case of test signal, all i get is a DC signal (but i
configure the register CONFIG2 with this 0b11010000) and channels
0b00000101....i don't know why they don't toggle and give me a square
signal...every other thing is normal.BTW i am using external
clock(2.048MHz) for ADS1299 and CLKSEL=0 (tied to GND). thank you for
reading this discussion.(here is a picture of what i get). the data are
in Microvolts and noise is -500uV so i get the correct amplitude of test
signal which in my case is 1.8V
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