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bdk: usb: hid: don't send a packet if no new data

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Reduce the interrupt caused at the host side
This commit is contained in:
CTCaer 2024-06-02 07:40:11 +03:00
parent e46f54d4e6
commit 6b54c4a477
1 changed files with 23 additions and 8 deletions
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31
bdk/usb/usb_gadget_hid.c
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@ -71,6 +71,12 @@ typedef struct _jc_cal_t
u16 cry_min; u16 cry_min;
} jc_cal_t; } jc_cal_t;
enum {
INPUT_POLL_HAS_PACKET,
INPUT_POLL_NO_PACKET,
INPUT_POLL_EXIT,
};
static jc_cal_t jc_cal_ctx; static jc_cal_t jc_cal_ctx;
static usb_ops_t usb_ops; static usb_ops_t usb_ops;
@ -119,22 +125,24 @@ static bool _jc_calibration(jc_gamepad_rpt_t *jc_pad)
return true; return true;
} }
static bool _jc_poll(gamepad_report_t *rpt) static int _jc_poll(gamepad_report_t *rpt)
{ {
static gamepad_report_t prev_rpt = {0};
// Poll Joy-Con. // Poll Joy-Con.
jc_gamepad_rpt_t *jc_pad = joycon_poll(); jc_gamepad_rpt_t *jc_pad = joycon_poll();
if (!jc_pad) if (!jc_pad)
return false; return INPUT_POLL_NO_PACKET;
// Exit emulation if Left stick and Home are pressed. // Exit emulation if Left stick and Home are pressed.
if (jc_pad->l3 && jc_pad->home) if (jc_pad->l3 && jc_pad->home)
return true; return INPUT_POLL_EXIT;
if (jc_cal_ctx.cl_step != JC_CAL_MAX_STEPS || jc_cal_ctx.cr_step != JC_CAL_MAX_STEPS) if (jc_cal_ctx.cl_step != JC_CAL_MAX_STEPS || jc_cal_ctx.cr_step != JC_CAL_MAX_STEPS)
{ {
if (!_jc_calibration(jc_pad)) if (!_jc_calibration(jc_pad))
return false; return INPUT_POLL_NO_PACKET;
} }
// Re-calibrate on disconnection. // Re-calibrate on disconnection.
@ -282,7 +290,12 @@ static bool _jc_poll(gamepad_report_t *rpt)
//rpt->btn13 = jc_pad->cap; //rpt->btn13 = jc_pad->cap;
//rpt->btn14 = jc_pad->home; //rpt->btn14 = jc_pad->home;
return false; if (!memcmp(rpt, &prev_rpt, sizeof(gamepad_report_t)))
return INPUT_POLL_NO_PACKET;
memcpy(&prev_rpt, rpt, sizeof(gamepad_report_t));
return INPUT_POLL_HAS_PACKET;
} }
typedef struct _touchpad_report_t typedef struct _touchpad_report_t
@ -351,12 +364,14 @@ static u8 _hid_transfer_start(usb_ctxt_t *usbs, u32 len)
static bool _hid_poll_jc(usb_ctxt_t *usbs) static bool _hid_poll_jc(usb_ctxt_t *usbs)
{ {
if (_jc_poll((gamepad_report_t *)USB_EP_BULK_IN_BUF_ADDR)) int res = _jc_poll((gamepad_report_t *)USB_EP_BULK_IN_BUF_ADDR);
if (res == INPUT_POLL_EXIT)
return true; return true;
// Send HID report. // Send HID report.
if (_hid_transfer_start(usbs, sizeof(gamepad_report_t))) if (res == INPUT_POLL_HAS_PACKET)
return true; // EP Error. if (_hid_transfer_start(usbs, sizeof(gamepad_report_t)))
return true; // EP Error.
return false; return false;
} }