12-01-2021 05:10 AM
@HKPhysicist wrote:
Did you buy chips from unknown China sellers on Amazin or ebay?
They reuse parts from broken gears and also remark them. 🤔
Mikroe's parts are genuine. Their parts work many years.
While that is a valid concern with such chips, it doesn't have to be the case here. SPI and I2C are pretty involved standards with many different operation modes. Some are more exotic than others and it is very possible that the standard FTDI MPSSE engine might not support bidirectional data transfer for the SPI interface. I haven't worked on that level with those MPSSE capable chips, but mostly in getting to interface to them from the host from LabVIEW real-time applications. For most of the work I did nomal UART operation was enough and a few times simple I2C communication. The only SPI interface I did so far was directly implemented in LabVIEW FPGA to talk to 8 simultaneous sampling multi channel ADCs.