[sdiy] STM32 vs WM8731

[Rob]

Just continuing on the STM32 discussions.

 

I've been trying to get a Nucleo-F411RE talking to a WM8731, but not having
much luck getting it to communicate over I2C

 

I send the following from the STM32:

 

                WM8731Status[0] = HAL_I2C_Master_Transmit(&hi2c1, 0x34,
WM8731PowerOn1, 1, 10000);

 

But I don't get an Ack from the WM8731:

 

 
https://www.dropbox.com/s/yhen98n17pyrqgr/Screenshot%202016-02-16%2008.22.15
.png?dl=0

 

Here's the schematic for the WM8731 setup:

 

 
https://www.dropbox.com/s/e6fkerkmf95ldzf/Screenshot%202016-02-16%2008.20.29
.png?dl=0

 

I'm pretty sure everything on the STM32 side is setup correctly, and I'm
working on the assumption that there's not a lot to do with the WM8731. Once
all the power is connected and the I2C mode and address pins are set low it
should just receive I2C messages. I think the issue might be around the
address, but I've tried all combinations I can think of.

 

Any help would be much appreciated as my wife is getting tired of me
shouting at the darn thing!

 

Many thanks in advance

 

Rob

gmsn.co.uk

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