USB-8452 SPI scripting write read with HCM6300/HCM6301 - no data read, scope shows otherwise

[kagaoanjc]

Hi, 

So I've managed to get a USB-8452 and was able to match the timing diagram given by the datasheet 
HCM6300/HCM6301 SPI timing Diagram

However as I was the VI, I always get a read data value of 0 even though when viewed under a scope, I could see some data on the 8452's MISO line.  

LEGEND:
Blue - Chip Select
Red - Clock

Green - MOSI USB-8452
Yellow - MISO USB-8452

This is the waveform when writing data, here I am writing 0x34 to address/row 0x00 with device address 0x07, LSB first

Writing data 0x34 to Row 0 at Device Address 0x07

Here, I am reading back the data from the said address/row 0x00 with device address 0x07, LSB first

And I'm expecting to receive 0x34 (0x2C when LSB first)

Reading back data 0x34 to Row 0 at Device Address 0x07Read Data from the last write read VI - 0, but waveform shows otherwise


Would this be something related to the driver? Or is there something I'm missing?

[santo_13]

What is the purpose of this piece of code? I could not match these 4 bits to anything.

Any reason you want to go with script mode and not normal mode?