diff --git a/shared-module/usb_hid/Device.c b/shared-module/usb_hid/Device.c index f92c93baa3540..0bc65036d836e 100644 --- a/shared-module/usb_hid/Device.c +++ b/shared-module/usb_hid/Device.c @@ -24,6 +24,7 @@ * THE SOFTWARE. */ +#include #include #include "py/gc.h" @@ -121,6 +122,18 @@ static const uint8_t mouse_report_descriptor[] = { 0xC0, // End Collection }; +static inline bool bitset_is_set(const uint8_t* bitset, int index) { + return (bitset[index >> 3] & (1 << (index & 0x7))) != 0; +} + +static inline void bitset_set(uint8_t* bitset, int index) { + bitset[index >> 3] |= (1 << (index & 0x7)); +} + +static inline void bitset_clear(uint8_t* bitset, int index) { + bitset[index >> 3] &= ~(1 << (index & 0x7)); +} + const usb_hid_device_obj_t usb_hid_device_mouse_obj = { .base = { .type = &usb_hid_device_type, @@ -241,6 +254,9 @@ void common_hal_usb_hid_device_send_report(usb_hid_device_obj_t *self, uint8_t * mp_obj_t common_hal_usb_hid_device_get_last_received_report(usb_hid_device_obj_t *self, uint8_t report_id) { // report_id has already been validated for this device. size_t id_idx = get_report_id_idx(self, report_id); + if (!bitset_is_set(self->out_report_buffers_updated, id_idx)) + return mp_const_none; + bitset_clear(self->out_report_buffers_updated, id_idx); return mp_obj_new_bytes(self->out_report_buffers[id_idx], self->out_report_lengths[id_idx]); } @@ -258,6 +274,7 @@ void usb_hid_device_create_report_buffers(usb_hid_device_obj_t *self) { ? gc_alloc(self->out_report_lengths[i], false, true /*long-lived*/) : NULL; } + memset(self->out_report_buffers_updated, 0, sizeof(self->out_report_buffers_updated)); } @@ -304,6 +321,7 @@ void tud_hid_set_report_cb(uint8_t itf, uint8_t report_id, hid_report_type_t rep hid_device->out_report_buffers[id_idx] && hid_device->out_report_lengths[id_idx] >= bufsize) { memcpy(hid_device->out_report_buffers[id_idx], buffer, bufsize); + bitset_set(hid_device->out_report_buffers_updated, id_idx); } } } diff --git a/shared-module/usb_hid/Device.h b/shared-module/usb_hid/Device.h index f265712be41e3..8254eb72a8a0e 100644 --- a/shared-module/usb_hid/Device.h +++ b/shared-module/usb_hid/Device.h @@ -38,6 +38,7 @@ typedef struct { const uint8_t *report_descriptor; uint8_t *in_report_buffers[CIRCUITPY_USB_HID_MAX_REPORT_IDS_PER_DESCRIPTOR]; uint8_t *out_report_buffers[CIRCUITPY_USB_HID_MAX_REPORT_IDS_PER_DESCRIPTOR]; + uint8_t out_report_buffers_updated[(CIRCUITPY_USB_HID_MAX_REPORT_IDS_PER_DESCRIPTOR + 7) / 8]; uint16_t report_descriptor_length; uint8_t report_ids[CIRCUITPY_USB_HID_MAX_REPORT_IDS_PER_DESCRIPTOR]; uint8_t in_report_lengths[CIRCUITPY_USB_HID_MAX_REPORT_IDS_PER_DESCRIPTOR]; pFad - Phonifier reborn

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