CC2540 SPI SLAVE with MCU SPI MASTER USING HCI

Hi Georgios,

We have a wiki page that describes the different ways of using CC254x as a "network processor", more info is found here: http://processors.wiki.ti.com/index.php/CC254X_WITH_EXT_MCU 

Best Regards

Joakim 

Hi there Joakim,

The link doesn't exist :(

Also I have read about the external MCU.  It says that:

The HostTestRelease project (included with standard BLE SDK) is the standard BLE Network Processor application. It can be loaded on the CC2540 or CC2541, with the any of the following used as a network processor interface:

1. UART
2. SPI
3. USB CDC virtual UART (CC2540 only)

So Which of the HostTestRelease project should I use?  And do I need to make any altering to the project or will the MCU sending and HCI command will successfully communicate without anything else.

Hi Georgios,

The HostTestRelease is one project and you should use the SPI build if you want to use SPI (Recommended). It will compile to fully parse HCI command. The SPI design guide is attached:

3583.BLE SPI Driver Design External.pdf

By the way, I repaired the link.

Best Regards

Joakim

Hi Joakim,

Thank you for the pdf.  It is really helpfull.  My concern is that my MCU has more than one SPI so I control them via different CS's.  There is no need for the other SPI peripherals of the SRDY pin.  As I understand, correct me if I'm wrong, that the CC2540 working as a Slave needs to have a pin for SRDY, so another pin on my MCU must be used to poll it in order for me to be able to send from the MCU the Frames.

For the time being I have implemented the following connection:

Do I have to put a GPIO on my MCU (Master) connected to CC2540 (Slave) on pin P1.1?  Or is it possible with the above connection to be able to communicagte with the CC2540.

Thank you in advance,

Georgios

Maybe this helps:
http://e2e.ti.com/support/wireless_connectivity/f/538/t/259995

Georgios, did you ever get an answer to your question? I'm running into the same issue, I have a connection bewteen a MCU master and CC2540 Slave *without* the SRDY line on P1.1 connected to anything. I'd presume the CC2540 could still receive incoming commands from the master over SPI, it just wouldn't be able to alert the master when it had data to transmit back.

If you got this working, do you have an example set of SPI bytes you sent from the master? I've translated several HCI commands into the desired SPI packet format, but am getting no feedback or response from the chip, so I don't know if there's something wrong with the chip firmware, or with the bytes I'm sending down.

Thanks,

Michael

Hello,

Has anyone achieved this in order to give us some guidelines, please?

I am trying the HostTestRelease Project (Stack 1.4.1) and more specifically, the CC2540SPI version on cc2540  with 128K flash.

and the the preprocessor settings :

INT_HEAP_LEN=3072

HALNODEBUG

OSAL_CBTIMER_NUM_TASKS=1

HAL_AES_DMA=TRUE

HAL_DMA=TRUE

xPOWER_SAVING

xPLUS_BROADCASTER

HAL_LCD=TRUE

HAL_LED=FALSE

SERIAL_INTERFACE

HAL_UART=TRUE

HAL_UART_DMA=1

HAL_UART_ISR=0

HAL_KEY=FALSE

GATT_DB_OFF_CHIP

and I get this error:

Could anyone help me please?