CC2541: Add own function to examples from BLE stack (simple UART exchange)

AIU2017

Intellectual 360 points

Part Number: CC2541
Other Parts Discussed in Thread: CC2540

Hello,

I have couple modules with CC2541:

I have uploaded through debugger SimpleBLEPeripheral example from BLE stack (BLE-CC254x-1.4.2.2).

Now I'm able to see it via phone with android and in SmartRF Studio.

So, I suppose everything with settings/wiring is fine.

How can I add my own function to this project?

For example, sending some bytes throuhg UART.

I have connected USB-UART dongle ( ) to P03 and P02 pins and want to see some packets throught terminal at first.

(In further I would like also to see how to use I2C with this module, but let's postpone it for later)

As I understand (correct me please if I'm wrong) in SimpleBLEPeripheral_Main.c I have nothing to do,

since function

 /* Start OSAL */
  osal_start_system();

calls

osal_run_system();

in forever loop. And in this function only pocessing tasks and events. So, I need to work with simpleBLEPeripheral.c I suppose?

As I understand, I need to create my own task?

I checked another examples and figured out that I need to use

osal_start_timerEx()

to set time with interrupt.

But how can I add my own function in all system?

I tried add this

void custom_func_test()
{
  uint8 testbuf [5]={7,6,5,4,3};
  
  osal_start_timerEx( 1, 2, 100);
  SimpleBLEPeripheral_ProcessEvent(11, 1);
  HalUARTWrite(1, testbuf, 5);
}

but I have no clue from where I need to call it. (tried to put in MAIN function before OSALsystem run in simpleBLEperipheral_main.c , but debugger dint not even get there)

over 7 years ago

0 A. Rebel over 7 years ago

TI__Genius 11740 points

Hi AIU2017,

Why not take a look at our example projects for guidance on this? (Or look at the step by step guides?)

processors.wiki.ti.com/.../Category:BluetoothLE

And look under CC254x Bluetooth low energy

Regards,
Rebel

0 AIU2017 over 7 years ago in reply to A. Rebel

Intellectual 360 points

Hi Rebel,

Unfortunatelly, I have issue with SimpleBLEPeripheral_SerialInterface example (described in this topic https://e2e.ti.com/support/wireless_connectivity/bluetooth_low_energy/f/538/t/598254).

I'm studying SWRU271 right now (CC2540 and CC2541 Bluetooth® low energy Software Developer’s Reference Guide) but this manual is pretty complex - still dont understand where I can insert my own functions and how can I insert it into forever loop from osal_run_system().

I have checked OSAL_SimpleBLEPeripheral.c , simpleBLEPeripheral.c files from SimpleBLEPeripheral_SerialInterface and from original SimpleBLEPeripheral, there is only few differences:

simpleBLEPeripheral.c:

#if defined (SERIAL_INTERFACE)
#include "serialInterface.h"
#endif

//call in order to allow more CPU time for driver
HCI_EXT_HaltDuringRfCmd(HCI_EXT_HALT_DURING_RF_DISABLE);

(+ some TRUE to FALSE in advertisement settings)

simpleBLEPeripheral.h:

Only one string added

uint8 Application_StartAdvertise(uint16 duration, uint16 interval);

OSAL_SimpleBLEPeripheral.c:

#if defined (SERIAL_INTERFACE)
#include "serialInterface.h"
#endif


  GATTServApp_ProcessEvent,                                         // task 10
#if defined (SERIAL_INTERFACE)
  SerialInterface_ProcessEvent,
#endif 

  GATTServApp_Init( taskID++ );
#if defined (SERIAL_INTERFACE)
  SerialInterface_Init(taskID++ );
#endif

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CC2541: Add own function to examples from BLE stack (simple UART exchange)