114 lines
3.2 KiB
C
114 lines
3.2 KiB
C
#include "usbd_core.h"
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#include "usbd_audio.h"
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struct usbd_audio_control_info audio_control_info = { 0xdb00, 0x0000, 0x0100, 0xf600, 0 };
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int audio_class_request_handler(struct usb_setup_packet *setup, uint8_t **data, uint32_t *len)
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{
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USBD_LOG_DBG("AUDIO Class request: "
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"bRequest 0x%02x\r\n",
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setup->bRequest);
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switch (setup->bRequest) {
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case AUDIO_REQUEST_SET_CUR:
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if (setup->wValueL == 0x01) {
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if (setup->wValueH == AUDIO_FU_CONTROL_MUTE) {
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memcpy(&audio_control_info.mute, *data, *len);
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} else if (setup->wValueH == AUDIO_FU_CONTROL_VOLUME) {
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memcpy(&audio_control_info.vol_current, *data, *len);
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uint32_t vol;
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if (audio_control_info.vol_current == 0) {
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vol = 100;
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} else {
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vol = (audio_control_info.vol_current - 0xDB00 + 1) * 100 / (0xFFFF - 0xDB00);
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}
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usbd_audio_set_volume(vol);
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USBD_LOG_INFO("current audio volume:%d\r\n", vol);
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}
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}
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break;
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case AUDIO_REQUEST_GET_CUR:
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if (setup->wValueH == AUDIO_FU_CONTROL_MUTE) {
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*data = (uint8_t *)&audio_control_info.mute;
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*len = 1;
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} else if (setup->wValueH == AUDIO_FU_CONTROL_VOLUME) {
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*data = (uint8_t *)&audio_control_info.vol_current;
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*len = 2;
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}
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break;
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case AUDIO_REQUEST_SET_RES:
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break;
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case AUDIO_REQUEST_SET_MEM:
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break;
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case AUDIO_REQUEST_GET_MIN:
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*data = (uint8_t *)&audio_control_info.vol_min;
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*len = 2;
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break;
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case AUDIO_REQUEST_GET_MAX:
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*data = (uint8_t *)&audio_control_info.vol_max;
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*len = 2;
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break;
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case AUDIO_REQUEST_GET_RES:
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*data = (uint8_t *)&audio_control_info.vol_res;
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*len = 2;
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break;
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case AUDIO_REQUEST_GET_MEM:
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*data[0] = 0;
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*len = 1;
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break;
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default:
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USBD_LOG_WRN("Unhandled Audio Class bRequest 0x%02x\r\n", setup->bRequest);
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return -1;
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}
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return 0;
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}
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void audio_notify_handler(uint8_t event, void *arg)
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{
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switch (event) {
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case USB_EVENT_RESET:
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break;
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case USB_EVENT_SOF:
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break;
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case USB_EVENT_SET_INTERFACE:
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usbd_audio_set_interface_callback(((uint8_t *)arg)[3]);
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break;
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default:
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break;
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}
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}
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__weak void usbd_audio_set_volume(uint8_t vol)
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{
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}
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void usbd_audio_add_interface(usbd_class_t *class, usbd_interface_t *intf)
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{
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static usbd_class_t *last_class = NULL;
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if (last_class != class) {
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last_class = class;
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usbd_class_register(class);
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}
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intf->class_handler = audio_class_request_handler;
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intf->custom_handler = NULL;
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intf->vendor_handler = NULL;
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intf->notify_handler = audio_notify_handler;
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usbd_class_add_interface(class, intf);
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} |