LP-CC1352P7: Data streamer example code for LP-CC1352P7

Dnyaneshvar s

Part Number: LP-CC1352P7
Other Parts Discussed in Thread: CC1352P7, CC2650

Hello,

I have LP-CC1352P7-4 launchpad and I wanted to implement BLE central role with explample code like "data streamer" or "simple serial socket master" where i can send more data like 100KBytes.

is there any github link available for LP-CC1352P7-4

thank you

Dnyaneshvar Salve

1 month ago

+1 Arthur R☑️ 1 month ago

TI__Genius 16316 points

Hi Dnyaneshvar,

The easiest way to do so would be to start from the simple_peripheral project on LP-CC1352P7, and copy the content of those files inside of the simple_peripheral application files: https://github.com/TexasInstruments/ble_examples/tree/simplelink_cc13xx_26xx_sdk-6.40/examples/rtos/LP_CC2651R3SIPA/ble5apps/simple_serial_socket_client

Regards,

Arthur

0 Dnyaneshvar s 1 month ago in reply to Arthur R☑️

Intellectual 501 points

Hello Arthur,

I have done few changes in the project "simple_central_LP_CC1352P7_4_tirtos7_ticlang" (SDK - simplelink_cc13xx_cc26xx_sdk_7_40_00_77)

File name -> simple_central.c

Function name -> bool SimpleCentral_doGattWrite(uint8_t index)

I have (image) array store in image.h file.(File header included)

 int remained_data_bytes = 0;

bool SimpleCentral_doGattWrite(uint8_t index)
{
    uint32 tx_buff_size = 244;
    int height = 480;
    int width = 800;
    int image_size = height*width/8*2;

//    while(remained_data_bytes <= (tx_buff_size*2))
    while (remained_data_bytes <= image_size)
    {
        status_t status;
        uint8_t charVals[4] = { 0x43, 0x55, 0xAA, 0xFF }; // Should be consistent with    0x43 is 'c' in ascii to clear the display
                                                          // those in scMenuGattWrite

        attWriteReq_t req;
        req.pValue = GATT_bm_alloc(scConnHandle, ATT_WRITE_RSP, tx_buff_size,
        NULL);

        if (req.pValue != NULL)
        {
            uint8_t connIndex = SimpleCentral_getConnIndex(scConnHandle);

            // connIndex cannot be equal to or greater than MAX_NUM_BLE_CONNS
            SIMPLECENTRAL_ASSERT(connIndex < MAX_NUM_BLE_CONNS);

            req.handle = connList[connIndex].charHandle;
            req.len = tx_buff_size;
            memcpy(req.pValue, (gImage_7in5_V2_b + remained_data_bytes),
                   tx_buff_size); // Copy the entire array to pValue
            req.sig = 0;
            req.cmd = 0;

            status = GATT_WriteCharValue(scConnHandle, &req, selfEntity);
            if (status != SUCCESS)
            {
                GATT_bm_free((gattMsg_t*) &req, ATT_WRITE_RSP);
            }
            remained_data_bytes += tx_buff_size;
        }
    }
  return (true);
}

when I execute this code from file simple_central_menu.c using button menu options, I can successfully send 244 bytes from LP_CC1352P7_4 to the BLE peripheral device (CC2650).

The remaining bytes (96000-244 = 95756) are not being sent.

Please help me to understand the code execution flow and code structures so that i can edit this code as per my application

Please guide.

// Menu: GattWrite
// upper: PerConnection
  MENU_OBJ(scMenuGattWrite, "GATT Write", 4, &scMenuPerConn)
  MENU_ITEM_ACTION(scMenuGattWrite,0,"Write clear",SimpleCentral_doGattWrite)
  MENU_ITEM_ACTION(scMenuGattWrite,1,"Write 0x55", SimpleCentral_doGattWrite)
  MENU_ITEM_ACTION(scMenuGattWrite,2,"Write 0xAA", SimpleCentral_doGattWrite)
  MENU_ITEM_ACTION(scMenuGattWrite,3,"Write 0xFF", SimpleCentral_doGattWrite)
  MENU_OBJ_END

Thank you

Dnyaneshvar Salve

0 Arthur R☑️ 1 month ago in reply to Dnyaneshvar s

TI__Genius 16316 points

HI Dnyaneshvar,

Did you give up on porting simple serial socket to your CC1352P7?

What is the return value of GATT_WriteCharValue?

According to https://software-dl.ti.com/lprf/simplelink_cc2640r2_latest/docs/blestack/ble_user_guide/doxygen/ble/html/group___a_t_t___g_a_t_t.html

You should not run your logic in a while loop in that method, but rather call the function again when you received a GATT_MSG_EVENT, with the ATT_WRITE_RSP value: