I make a ble hid usb dongle with ncs2.0, ble keyboard send keycode to hid dongle, hid dongle send the keycode to computer.
When keyboard send keycode slow, it's work fine. But when keyboard send keycode fast, it show "Failed to write endpoint buffer 0x81" sometimes, and in computer side, some keyboard data lost.
Some code:
static uint8_t hogp_notify_cb(struct bt_hogp *hogp,
struct bt_hogp_rep_info *rep,
uint8_t err,
const uint8_t *data)
{
uint8_t report[20];
uint8_t size = bt_hogp_rep_size(rep);
uint8_t i;
int ret;
if (!data) {
return BT_GATT_ITER_STOP;
}
memcpy(&report[1], data, size);
report[0] = INPUT_REP_KEYS_REF_ID;
ret = hid_int_ep_write(usb_hid_dev, report, INPUT_REPORT_KEYS_MAX_LEN+1, NULL);
if (ret) {
printk("HID write error, %d\n", ret);
}
return BT_GATT_ITER_CONTINUE;
}
Log info:
00> W: Failed to write endpoint buffer 0x81 00> W: Failed to write endpoint buffer 0x81 00> W: Failed to write endpoint buffer 0x81 00> W: Failed to write endpoint buffer 0x81 00> W: Failed to write endpoint buffer 0x81 00> W: Failed to write endpoint buffer 0x81 00> W: Failed to write endpoint buffer 0x81 00> W: Failed to write endpoint buffer 0x81 00> W: Failed to write endpoint buffer 0x81 00> HID write error, -11 00> W: Failed to write endpoint buffer 0x81 00> W: Failed to write endpoint buffer 0x81 00> W: Failed to write endpoint buffer 0x81 00> W: Failed to write endpoint buffer 0x81 00> W: Failed to write endpoint buffer 0x81 00> W: Failed to write endpoint buffer 0x81 00> HID write error, -11 00> W: Failed to write endpoint buffer 0x81 00> W: Failed to write endpoint buffer 0x81 00> W: Failed to write endpoint buffer 0x81
