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AD7190 - write issue

Question asked by algol on May 17, 2012
Latest reply on May 18, 2012 by TimW

Good day!


I connect AD7190 to my STM32F217 board through SPI2. I can read from configuration registers, when power on. For example, I read from Mode and Configuration registers their default values - 0x080060 and 0x000117 respectively. So, I guess, that my schematic and SPI configuration are valid.

But, I have an issue, when I try to write to register. After write operation, I read wrong values from current register.


For example, I write Mode register:

CS -> low, send to AD7190 four bytes - 0x48 (Communication register), 0x28, 0x00, 0x60 (Data), CS -> high.

But, after that, I read only 0xFF.


sorry for my English,

best regards.