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cc256x: configure PCM/I2S for CVSD, if ENABLE_SCO_OVER_PCM is defined

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This commit is contained in:
Matthias Ringwald 2020-11-18 15:12:56 +01:00
parent 365a7dd12b
commit 49ed206d42
1 changed files with 47 additions and 55 deletions
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102
chipset/cc256x/btstack_chipset_cc256x.c
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@ -78,6 +78,10 @@
#error "HCI_INCOMING_PACKET_BUFFER_SIZE to small. Incoming HCI packet buffer to small for largest HCI Event packet. Please set HCI_ACL_PAYLOAD_SIZE to 257 or higher."
#endif
#if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM)
#error "SCO can either be routed over HCI or PCM, please define only one of: ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM"
#endif
#if defined(__GNUC__) && defined(__MSP430X__) && (__MSP430X__ > 0)
#include "hal_compat.h"
#endif
@ -113,61 +117,39 @@ static uint32_t init_script_offset = 0;
// support for SCO over HCI
#ifdef ENABLE_SCO_OVER_HCI
static int init_send_route_sco_over_hci = 0;
static int init_send_route_sco_over_hci = 0;
static const uint8_t hci_route_sco_over_hci[] = {
#if 1
// Follow recommendation from https://e2e.ti.com/support/wireless_connectivity/bluetooth_cc256x/f/660/t/397004
// route SCO over HCI (connection type=1, tx buffer size = 120, tx buffer max latency= 720, accept packets with CRC Error
0x10, 0xfe, 0x05, 0x01, 0x78, 0xd0, 0x02, 0x01,
#else
// Configure SCO via I2S interface - 256 kbps
// Send_HCI_VS_Write_CODEC_Config 0xFD06,
0x06, 0xfd,
// len
34,
//3072, - clock rate 3072000 hz
0x00, 0x01,
// 0x00 - clock direction: output = master
0x00,
// 8000, framesync frequency in hz
0x40, 0x1f, 0x00, 0x00,
// 0x0001, framesync duty cycle
0x01, 0x00,
// 1, framesync edge
1,
// 0x00, framesync polarity
0x00,
// 0x00, RESERVED
0x00,
// 16, channel 1 out size
8, 0,
// 0x0001, channel 1 out offset
0x01, 0x00,
// 1, channel 1 out edge
1,
// 16, channel 1 in size
8, 0,
// 0x0001, channel 1 in offset
0x01, 0x00,
// 0, channel 1 in edge
0,
// 0x00, RESERVED
0x00,
// 16, channel 2 out size
8, 0,
// 17, channel 2 out offset
9, 0,
// 0x01, channel 2 out edge
0x01,
// 16, channel 2 in size
8, 0,
// 17, channel 2 in offset
9, 0,
// 0x00, channel 2 in edge
0x00,
// 0x0001, RESERVED
0x00
// Follow recommendation from https://e2e.ti.com/support/wireless_connectivity/bluetooth_cc256x/f/660/t/397004
// route SCO over HCI (connection type=1, tx buffer size = 120, tx buffer max latency= 720, accept packets with CRC Error
0x10, 0xfe, 0x05, 0x01, 0x78, 0xd0, 0x02, 0x01,
};
#endif
#ifdef ENABLE_SCO_OVER_PCM
static int init_send_sco_i2s_config_cvsd = 0;
static const uint8_t hci_write_codec_config_cvsd[] = {
0x06, 0xFD, // HCI opcode = HCI_VS_Write_CODEC_Config
0x22, // HCI param length
0x00, 0x01, // PCM clock rate 256, - clock rate 256000 Hz
0x00, // PCM clock direction = master
0x40, 0x1F, 0x00, 0x00, // PCM frame sync = 8kHz
0x10, 0x00, // PCM frame sync duty cycle = 16 clk
0x01, // PCM frame edge = rising edge
0x00, // PCM frame polarity = active high
0x00, // Reserved
0x10, 0x00, // PCM channel 1 out size = 16
0x01, 0x00, // PCM channel 1 out offset = 1
0x01, // PCM channel 1 out edge = rising
0x10, 0x00, // PCM channel 1 in size = 16
0x01, 0x00, // PCM channel 1 in offset = 1
0x00, // PCM channel 1 in edge = falling
0x00, // Reserved
0x10, 0x00, // PCM channel 2 out size = 16
0x11, 0x00, // PCM channel 2 out offset = 17
0x01, // PCM channel 2 out edge = rising
0x10, 0x00, // PCM channel 2 in size = 16
0x11, 0x00, // PCM channel 2 in offset = 17
0x00, // PCM channel 2 in edge = falling
0x00, // Reserved
};
#endif
@ -190,6 +172,9 @@ static void chipset_init(const void * config){
#ifdef ENABLE_SCO_OVER_HCI
init_send_route_sco_over_hci = 1;
#endif
#ifdef ENABLE_SCO_OVER_PCM
init_send_sco_i2s_config_cvsd = 1;
#endif
}
static void chipset_set_baudrate_command(uint32_t baudrate, uint8_t *hci_cmd_buffer){
@ -330,8 +315,15 @@ static btstack_chipset_result_t chipset_next_command(uint8_t * hci_cmd_buffer){
return BTSTACK_CHIPSET_VALID_COMMAND;
}
#endif
return BTSTACK_CHIPSET_DONE;
#ifdef ENABLE_SCO_OVER_PCM
// append sco i2s cvsd config
if (init_send_sco_i2s_config_cvsd){
init_send_sco_i2s_config_cvsd = 0;
memcpy(hci_cmd_buffer, hci_write_codec_config_cvsd, sizeof(hci_write_codec_config_cvsd));
return BTSTACK_CHIPSET_VALID_COMMAND;
}
#endif
return BTSTACK_CHIPSET_DONE;
}
// extracted init script has 0x01 cmd packet type, but BTstack expects them without