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update(demo): add macro for caculating feedback value
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@sakumisu
sakumisu committed Jan 13, 2025
1 parent 570d2b5 commit a1ac569
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Showing 3 changed files with 31 additions and 4 deletions.
23 changes: 19 additions & 4 deletions class/audio/usb_audio.h
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Original file line number Diff line number Diff line change
Expand Up @@ -862,7 +862,7 @@ struct audio_cs_ep_ep_general_descriptor {
0x05, /* bmAttributes */ \
WBVAL(wMaxPacketSize), /* wMaxPacketSize */ \
bInterval, /* bInterval : one packet per frame */ \
bInterval, /* bRefresh */ \
0x00, /* bRefresh */ \
bFeedbackEndpointAddress, /* bSynchAddress */ \
0x07, /* bLength */ \
AUDIO_ENDPOINT_DESCRIPTOR_TYPE, /* bDescriptorType */ \
Expand All @@ -874,10 +874,10 @@ struct audio_cs_ep_ep_general_descriptor {
0x09, /* bLength */ \
USB_DESCRIPTOR_TYPE_ENDPOINT, /* bDescriptorType */ \
bFeedbackEndpointAddress, /* bFeedbackEndpointAddress Revise Dir to bEndpointAddress */ \
0x11, /* bmAttributes: TransferType=Isochronous SyncType=None EndpointType=Feedback */ \
0x15, /* bmAttributes: TransferType=Isochronous SyncType=Asynchronous EndpointType=Feedback */ \
WBVAL(4), /* XXXX wMaxPacketSize in Bytes */ \
bInterval, /* bInterval */ \
0x00, /* bRefresh */ \
0x03, /* bRefresh, 8ms */ \
0x00 /* bSynchAddress */

#define AUDIO_AS_DESCRIPTOR_INIT_LEN(n) (0x09 + 0x09 + 0x07 + 0x08 + 3 * n + 0x09 + 0x07)
Expand Down Expand Up @@ -1325,7 +1325,7 @@ struct audio_v2_control_range3_param_block {
0x07, /* bLength */ \
USB_DESCRIPTOR_TYPE_ENDPOINT, /* bDescriptorType */ \
bFeedbackEndpointAddress, /* bFeedbackEndpointAddress Revise Dir to bEndpointAddress */ \
0x11, /* bmAttributes: TransferType=Isochronous SyncType=None EndpointType=Feedback */ \
0x15, /* bmAttributes: TransferType=Isochronous SyncType=Asynchronous EndpointType=Feedback */ \
WBVAL(4), /* XXXX wMaxPacketSize in Bytes */ \
bInterval /* bInterval */

Expand All @@ -1340,4 +1340,19 @@ struct audio_v2_control_range3_param_block {
#define AUDIO_SAMPLE_FREQ_4B(frq) (uint8_t)(frq), (uint8_t)((frq >> 8)), \
(uint8_t)((frq >> 16)), (uint8_t)((frq >> 24))

/* format 10.14 */
#define AUDIO_UPDATE_FEEDBACK_DATA_FS(buf, freq) \
uint32_t value = ((freq / 1000) << 14) | ((freq % 1000) << 4); \
buf[0] = ((value >> 0U) & 0xFFU); \
buf[1] = ((value >> 8U) & 0xFFU); \
buf[2] = ((value >> 16U) & 0xFFU)

/* format 16.16 */
#define AUDIO_UPDATE_FEEDBACK_DATA_HS(buf, freq) \
uint32_t value = ((freq / 1000) << 13) | ((freq % 1000) << 3); \
buf[0] = ((value >> 0U) & 0xFFU); \
buf[1] = ((value >> 8U) & 0xFFU); \
buf[2] = ((value >> 16U) & 0xFFU); \
buf[3] = ((value >> 24U) & 0xFFU)

#endif /* USB_AUDIO_H */
2 changes: 2 additions & 0 deletions demo/audio_v1_mic_speaker_multichan_template.c
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Original file line number Diff line number Diff line change
Expand Up @@ -211,6 +211,7 @@ void usbd_audio_open(uint8_t busid, uint8_t intf)
rx_flag = 1;
/* setup first out ep read transfer */
usbd_ep_start_read(busid, AUDIO_OUT_EP, read_buffer, AUDIO_OUT_PACKET);
AUDIO_UPDATE_FEEDBACK_DATA_FS(s_speaker_feedback_buffer, AUDIO_SPEAKER_FREQ); /* uac1 can only use 10.14 */
usbd_ep_start_write(busid, AUDIO_OUT_FEEDBACK_EP, s_speaker_feedback_buffer, FEEDBACK_ENDP_PACKET_SIZE);
printf("OPEN1\r\n");
} else {
Expand Down Expand Up @@ -248,6 +249,7 @@ void usbd_audio_in_callback(uint8_t busid, uint8_t ep, uint32_t nbytes)
void usbd_audio_iso_out_feedback_callback(uint8_t busid, uint8_t ep, uint32_t nbytes)
{
USB_LOG_RAW("actual feedback len:%d\r\n", nbytes);
AUDIO_UPDATE_FEEDBACK_DATA_FS(s_speaker_feedback_buffer, AUDIO_SPEAKER_FREQ);
usbd_ep_start_write(busid, AUDIO_OUT_FEEDBACK_EP, s_speaker_feedback_buffer, FEEDBACK_ENDP_PACKET_SIZE);
}
#endif
Expand Down
10 changes: 10 additions & 0 deletions demo/audio_v2_speaker_multichan_template.c
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Original file line number Diff line number Diff line change
Expand Up @@ -232,6 +232,11 @@ void usbd_audio_open(uint8_t busid, uint8_t intf)
rx_flag = 1;
/* setup first out ep read transfer */
usbd_ep_start_read(busid, AUDIO_OUT_EP, read_buffer, AUDIO_OUT_PACKET);
#ifdef CONFIG_USB_HS
AUDIO_UPDATE_FEEDBACK_DATA_HS(s_speaker_feedback_buffer, AUDIO_FREQ);
#else
AUDIO_UPDATE_FEEDBACK_DATA_FS(s_speaker_feedback_buffer, AUDIO_FREQ);
#endif
usbd_ep_start_write(busid, AUDIO_OUT_FEEDBACK_EP, s_speaker_feedback_buffer, FEEDBACK_ENDP_PACKET_SIZE);
USB_LOG_RAW("OPEN\r\n");
}
Expand Down Expand Up @@ -259,6 +264,11 @@ void usbd_audio_iso_out_callback(uint8_t busid, uint8_t ep, uint32_t nbytes)
void usbd_audio_iso_out_feedback_callback(uint8_t busid, uint8_t ep, uint32_t nbytes)
{
USB_LOG_RAW("actual feedback len:%d\r\n", nbytes);
#ifdef CONFIG_USB_HS
AUDIO_UPDATE_FEEDBACK_DATA_HS(s_speaker_feedback_buffer, AUDIO_FREQ);
#else
AUDIO_UPDATE_FEEDBACK_DATA_FS(s_speaker_feedback_buffer, AUDIO_FREQ);
#endif
usbd_ep_start_write(busid, AUDIO_OUT_FEEDBACK_EP, s_speaker_feedback_buffer, FEEDBACK_ENDP_PACKET_SIZE);
}
#endif
Expand Down

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