ESP32 Forum

Posted: **Fri Apr 03, 2020 4:27 am**

Where can I find the Bluedroid source that is used by espressif?

looking in "esp_idf_Tools_V2_2\components\bt", I find only header files and libraries *.a

I want to find the error by myself in the source, otherwise I 100% depend on the help from the espressif-team

the Code in "bt_app_hf.c" seems buggy to me
- I believe this constellation is not fully tested
see the code-extract below
( Bluetooth Profile; Handfree Audiogateway SCO-path ==HCI)

- I found 3 jears old bugfixes of bluedroid in the web,
https://gitlab.com/Codeaurora/platform_ ... c7b9332b1a
that obviosly are not in the fixed in the current espressif version
( produce irritating ESP_LOGE Error-Messages, but not relevant)

Code: [Select all] [Expand/Collapse]

[b]CODE WITH BUGS!!![/b]
static const int16_t sine_int16[] = {
     0,    2057,    4107,    6140,    8149,   10126,   12062,   13952,   15786,   17557,
 19260,   20886,   22431,   23886,   25247,   26509,   27666,   28714,   29648,   30466,
 31163,   31738,   32187,   32509,   32702,   32767,   32702,   32509,   32187,   31738,
 31163,   30466,   29648,   28714,   27666,   26509,   25247,   23886,   22431,   20886,
 19260,   17557,   15786,   13952,   12062,   10126,    8149,    6140,    4107,    2057,
     0,   -2057,   -4107,   -6140,   -8149,  -10126,  -12062,  -13952,  -15786,  -17557,
-19260,  -20886,  -22431,  -23886,  -25247,  -26509,  -27666,  -28714,  -29648,  -30466,
-31163,  -31738,  -32187,  -32509,  -32702,  -32767,  -32702,  -32509,  -32187,  -31738,
-31163,  -30466,  -29648,  -28714,  -27666,  -26509,  -25247,  -23886,  -22431,  -20886,
-19260,  -17557,  -15786,  -13952,  -12062,  -10126,   -8149,   -6140,   -4107,   -2057,
};
 
#define TABLE_SIZE_CVSD   100
 
static uint32_t bt_app_hf_outgoing_cb(uint8_t *p_buf, uint32_t sz)
{
int sine_phase = esp_random();
 
    for (int i = 0; i < TABLE_SIZE_CVSD; i++) {[b]// BUG: Correct: sz   WRONG: ABLE_SIZE_CVSD[/b]
        p_buf[i * 2]      = sine_int16[sine_phase]; [b]//BUG if sz is < 2*100, we access bejond the Buffer!!![/b]
        p_buf[i * 2 + 1] = sine_int16[sine_phase];[b]//BUG; we do not use Highbyte of the Sinus!!![/b]
        ++sine_phase;
        if (sine_phase >= TABLE_SIZE_CVSD) {
            sine_phase -= TABLE_SIZE_CVSD;
        }
    }
    return sz; [b]//Bug: 200 Bytes are modified in buffer, not sz[/b]
}

GeSHi © Codebox Plus Extension

Code: [Select all] [Expand/Collapse]

[b]// Expected some Code like this - from bt_app_a2d example[/b]
static int32_t bt_app_a2d_data_cb(uint8_t *data, int32_t len)
{
    if (len < 0 || data == NULL) {
        return 0;
    }
 
    // generate random sequence
    int val = rand() % (1 << 16);
    for (int i = 0; i < (len >> 1); i++) {
        data[(i << 1)] = val & 0xff;
        data[(i << 1) + 1] = (val >> 8) & 0xff;
    }
 
    return len;
}

Posted: **Sun Apr 05, 2020 10:46 am**

You can find Bluedroid code at https://github.com/espressif/esp-idf/tr ... /bluedroid (for the latest IDF master branch).

I'm afraid I don't recognize what "esp_idf_Tools_V2_2", but Bluedroid code in IDF is always distributed in source form.

ESP32 Forum

Bluedroid source - where to sind?

Bluedroid source - where to sind?

Re: Bluedroid source - where to sind?