CC2541 SPI Programming

Georgios Mavropoulos

Other Parts Discussed in Thread: CC2541

Hi there,

I am new to programming the CC2541 and I'm aiming to connect it to my PIC. As I understand it can be connected with either UART or SPI. I have choosen SPI because both of my UART are used. I have installed the IAR software and am looking at the KeyFobDemo (since I have the CC2541DK). My question is if it is possible to send an SPI command from the PIC to the CC2541 and the later one to do something, eg. transmit it's IEEE.

Thanx in advance

over 12 years ago

0 Sarang Mandke over 12 years ago

TI__Prodigy 260 points

The SPI in itself is only a transport layer. So, you would need a "Get/Read IEEE address" on your slave to make this happen. The SPI would send that "Get/Read" Command over SPI to your higher layer protocol/app.

0 Georgios Mavropoulos over 12 years ago in reply to Sarang Mandke

Prodigy 235 points

Thank you for your reply Sarang. So I would have to write my own program in the CC2541 that will receive the SPI commands as a slave and then perform a specific command in order to get the IEEE. So why is that in all datasheets that TI has they say that it can be controlled from an external μC. Is there a way that I could operate the CC2541 from just a μC without writing on it, because it requires the IAR.

Thank you again.

0 Aslak N. over 12 years ago in reply to Georgios Mavropoulos

TI__Mastermind 23440 points

Hi Georgios,

Have a look at CC254x With External MCU, especially SimpleBLE_SerialInterface. It should be easy to open SPI instead of UART. For that, have a look at different build configs for e.g. HostTestApp, and look at the precompiler defines. Also, find more info on serial comms on ti.com/ble-wiki.

Best regards,
Aslak

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CC2541 SPI Programming