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PSoC™ 4 Forum Discussions

Anonymous
Not applicable

 Hi,

   

I'm trying to read the register contents from Artaflex CYRF6936-40LFXC radio modules on reset.

   

Till recently I used to get zeros from all registers. MISO pin showed a flat zero on CRO, with some abrupt pulses now and then.

   

I then reread the datasheet and realized that I had left RST pin and one of the two GND pins floating.

   

Datasheet says I have to connect 0.47uF from RST to VBAT but since VBAT is not available as a pin out from Artaflex module I have connected RST to VCC instead. I have shorted the two GND pins.

   

After doing this I started getting regular pulses on MISO pin. After 20 days of frustration, this was indeed a Eureka moment for me, so I wanted to read the register contents now.

   

I was expecting the default values to be read when I used CYFISNP_Read() function to read some registers like IO_CFG_ADR, PWR_CTRL_ADR and most importantly CYFISNP_FileRead() to read MFG_ID_ADR. But I was 0x00, 0xFF and some values in between. Today I removed all connections and reprogrammed the PSoC 4 and now the values are all 0's again.

   

Can someone please help me identify what I'm missing? 

   

Thanks and regards,

   

Shreesha

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2 Replies
ShopithamR_26
Employee
Employee
25 replies posted 10 replies posted 5 replies posted

Hi Shreesha,

   

Did you port the CYFISNP stack yourself or are you using the project from Cypress?

   


The project is available in the Github for download - https://github.com/cypresssemiconductorco/WUSB

   

This project was developed in Creator 2.2 and I have tested in Creator 3.0. The project works in both the build. We havent tested in other Creator versions. So try using the Creator3.0 . 

   

Are you in debug mode when you are seeing 0x00 . Can you try using UART and print out the register values instead of checking it in Debug mode ?

   

Regards,
Sobi

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Bob_Marlowe
Level 10
Level 10
First like given 50 questions asked 10 questions asked

Isn't the answer a bit late?

   

 

   

Bob

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