altos: Set USB Interrupt endpoint interval to maximum allowed

We don't ever send anything over this channel, so there's no sense
asking the host to poll it very often.

Signed-off-by: Keith Packard <keithp@keithp.com>

diff --git a/src/core/ao_product.c b/src/core/ao_product.c
index f79922f5ab8bdc52c2037a10b6f3ecc586b3a812..67ec67935fc7b20fb212a80ff194a9ea7f85a308 100644 (file)
--- a/src/core/ao_product.c
+++ b/src/core/ao_product.c
@@ -100,7 +100,7 @@ __code __at(0x00aa) uint8_t ao_usb_descriptors [] =
        AO_USB_INT_EP|0x80,     /* bEndpointAddress */
        0x03,                   /* bmAttributes = intr */
        LE_WORD(8),             /* wMaxPacketSize */
-       0x0A,                   /* bInterval */
+       0xff,                   /* bInterval */
 
        /* Data class interface descriptor */
        0x09,