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SCO: add hci_get_sco_packet_length to query SCO packet size needed for USB and use in hsp_hs_test

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This commit is contained in:
Matthias Ringwald 2016-01-16 21:57:34 +01:00
parent d5422c82dc
commit b3aad8da60
3 changed files with 33 additions and 6 deletions
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23
example/embedded/hsp_hs_test.c
View File

@ -43,12 +43,19 @@
//
// Tested working setups:
// - Ubuntu 14 64-bit, CC2564B connected via FTDI USB-2-UART adapter, 921600 baud
//
// Non working setups:
// - Ubuntu 14 64-bit, CSR dongle
// - OS X 10.11, CSR dongle
// Broken setups:
// - OS X 10.11, CC2564B connected via FDTI USB-2-UART adapter, 921600 baud
// - select(..) blocks > 400 ms -> num completed is received to late -> gaps between audio
// - looks like bug in select->FTDI driver as it works correct on Linux
// - OS X 10.11, USB Bluetooth Dongles...
//
// SCO not routed over HCI (yet)
// - CSR UART dongle
// - Broadcom USB dongle
// - Broadcom UART chipset
// - ..
// *****************************************************************************
#include "btstack-config.h"
@ -115,20 +122,24 @@ static void try_send_sco(void){
// printf("try_send_sco, cannot send now\n");
return;
}
const int frames_per_packet = 24;
const int sco_packet_length = hci_get_sco_packet_length();
const int sco_payload_length = sco_packet_length - 3;
const int frames_per_packet = sco_payload_length; // for 8-bit data. for 16-bit data it's /2
hci_reserve_packet_buffer();
uint8_t * sco_packet = hci_get_outgoing_packet_buffer();
// set handle + flags
bt_store_16(sco_packet, 0, sco_handle);
// set len
sco_packet[2] = frames_per_packet;
sco_packet[2] = sco_payload_length;
int i;
for (i=0;i<frames_per_packet;i++){
sco_packet[3+i] = sine[phase];
phase++;
if (phase >= sizeof(sine)) phase = 0;
}
hci_send_sco_packet_buffer(3 + frames_per_packet);
hci_send_sco_packet_buffer(sco_packet_length);
static int count = 0;
count++;
if ((count & 15) == 0) printf("Sent %u\n", count);

10
src/hci.c
View File

@ -3458,6 +3458,16 @@ uint16_t hci_get_sco_voice_setting(){
return hci_stack->sco_voice_setting;
}
/** @brief Get SCO packet length for current SCO Voice setting
* @note Using SCO packets of the exact length is required for USB transfer
* @return Length of SCO packets in bytes (not audio frames)
*/
int hci_get_sco_packet_length(void){
// see Core Spec for H2 USB Transfer.
if (hci_stack->sco_voice_setting & 0x0020) return 51;
return 27;
}
/**
* @brief Set callback for Bluetooth Hardware Error
*/

6
src/hci.h
View File

@ -970,6 +970,12 @@ void hci_set_sco_voice_setting(uint16_t voice_setting);
*/
uint16_t hci_get_sco_voice_setting(void);
/** @brief Get SCO packet length for current SCO Voice setting
* @note Using SCO packets of the exact length is required for USB transfer
* @return Length of SCO packets in bytes (not audio frames) incl. 3 byte header
*/
int hci_get_sco_packet_length(void);
/* API_END */
/**