ADS1278: ADCPro crashes and get undersized data
Part Number: ADS1278
i want to get data from ADS1278 EVM in SPI mode.
I have used EVM-PDK as power supply and raspberry pi as data extractor, as the picture shows:
I'm sure the hardwares are normal, but i can't capture data from ADS1278EVM.
I think I have errors in wiring or software.
I would like to ask you to provide some comments about it.
Here are all my wiring and settings:
S6 -> turn to SPI
JP4, JP5 -> open circuit
J3.7, J3.8 -> connect photodiode (1channel)
J4.2, J4.6 -> [0,1] High-Resolution
J4.8, J4.12, J4.14 -> [0,0,1] SPI TDM Fixed
J4.1 -> High (SYNC)
J4.19 -> High (CLK)
J4.15 -> start to capture data when voltage falling (DRDY)
J4.3 -> SCLK pin on Rapberry Pi
J4.13 -> MOSI pin on Rapberry Pi
J4.18 -> GND pin on Rapberry Pi
J5.3, J5.5, J5.7, J5.9 -> connect EVM-PDK
But it doesn't work with this setting.
I don't know where is the problem ?
Can you please help me to solve it ? Thank you.
Can you take some measurements and verify the signals are getting to the IO pins of the aDS1278? An oscilloscope or a logic analyzer could be used to verify communications.
Also, from your above list:
This is incorrect, and should be connected as shown:
J4.13 -> MISO pin on Rapberry Pi
Regards,Keith NicholasPrecision ADC Applications
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In reply to Keith Nicholas:
I use multimeter to ensure that these I/O pins are triggered by raspberry pi.
But I still did not capture any signal from the DOUT pin.
In this state, DOUT pin has no voltage value,
but it has the voltage value when connected to EVM-PDK.
I guess i have something unset but i don't know.
Maybe S1 or S2 should be changed or not ?
In reply to user6263950:
Make sure your FORMAT pins are set to the correct levels for SPI TDM Fixed:
Also, MODE pins are set correct levels for High Resolution:
S1 and S2 should all be set to the OFF condition.
S6 should be set for SPI mode:
jumpers installed on [2-3], [5-6], [8-9], [11-12]
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