Unexpected responding from CC3000

duy vinh to

I'm porting CC3000 (mRata LBWA1ZZVK7 rev2.0) to ST MCU (with STM32F4 discovery board). I can send command and receiving IRQ interrupt, but problem is feeback from CC3000 is wrong.

I have debugged and saw what had happened in function SimpleLink_Init_Start() as below:

HOST -> CC3000: 01 00 05 00 00 01 00 40 01 00

CC3000 -> HOST: 02 00 FF 00 00 00 00 00 00 00 (same result in example -> SPI is good)

Got IRQ interrupt (go low):

HOST -> CC3000: 03 00 00 00 ...

CC3000 -> HOST: 02 04 04 04 ... -> wreid result, except right opcode feedback 02 for 03, all fb bytes are 04

I tried with function nvmem_read_sp_version() but still got above problem.

over 12 years ago

0 sooraj r k over 12 years ago

Intellectual 415 points

Hi,
which patch version you are using?

best regards,
Sooraj

0 Marie Maurer over 12 years ago in reply to sooraj r k

Genius 4895 points

Hello Duy,

i cannot give real help here, but i read about such a problem before:

http://e2e.ti.com/support/low_power_rf/f/851/p/208684/750182.aspx#750182

Also there "02 04 04..." was received. And nice thing: Also there STM32 platform was used.

Perhaps it is something specific to STM32 SPI? Perhaps you can get in contact with the authors of the postings in the given thread, if they have found a solution for this problem. It would be nice, if you can share the solution, if you have found out, what it is.

Best regards,

Martin

0 Marie Maurer over 12 years ago in reply to Marie Maurer

Genius 4895 points

Question according to posting from

"Posted by Pedro5084 on Aug 20 2012 10:58 AM"

(of the above given thread):

- Do you use IAR? If yes, a version below 6.30?

- He has given his source code. Perhaps compare the source code against your code. Do you see a difference, especially in initialization of SPI of STM32?

Best regards,

Martin

0 duy vinh to over 12 years ago in reply to Marie Maurer

Prodigy 90 points

After some days digging through google, I finally solved my problem: adding a resistor 10 ohm to MOSI line (don't know how it work yet).

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Unexpected responding from CC3000