Workaround corrupted USB packets when status shows ready too soon

teensy4/usb_joystick.c

@@ -95,6 +95,7 @@ int usb_joystick_send()
                 if (!usb_configuration) return -1;
                 yield();
         }
+	delayNanoseconds(30); // TODO: why is status ready too soon?
         uint8_t *buffer = txbuffer + head * TX_BUFSIZE;
 	memcpy(buffer, usb_joystick_data, JOYSTICK_SIZE);
         usb_prepare_transfer(xfer, buffer, JOYSTICK_SIZE, 0);

teensy4/usb_keyboard.c

@@ -544,6 +544,7 @@ static int usb_keyboard_transmit(int endpoint, const uint8_t *data, uint32_t len
 		if (!usb_configuration) return -1;
 		yield();
 	}
+	delayNanoseconds(30); // min req'd 11 ns, TODO: why is status ready too soon?
 	uint8_t *buffer = txbuffer + head * TX_BUFSIZE;
 	memcpy(buffer, data, len);
 	usb_prepare_transfer(xfer, buffer, len, 0);

teensy4/usb_mouse.c

@@ -159,6 +159,7 @@ static int usb_mouse_transmit(const uint8_t *data, uint32_t len)
                 if (!usb_configuration) return -1;
                 yield();
         }
+	delayNanoseconds(30); // TODO: why is status ready too soon?
         uint8_t *buffer = txbuffer + head * TX_BUFSIZE;
         memcpy(buffer, data, len);
         usb_prepare_transfer(xfer, buffer, len, 0);

teensy4/usb_touch.c

@@ -109,6 +109,7 @@ static int transmit(const uint8_t *data)
 	if (status & 0x68) {
 		// TODO: what if status has errors???
 	}
+	delayNanoseconds(30); // TODO: is this needed?  (probably not)
 	uint8_t *buffer = txbuffer + head * TX_BUFSIZE;
 	memcpy(buffer, data, MULTITOUCH_SIZE);
 	usb_prepare_transfer(xfer, buffer, MULTITOUCH_SIZE, 0);