diff options
| author | charkster <[email protected]> | 2021-01-28 18:15:49 -0700 |
|---|---|---|
| committer | charkster <[email protected]> | 2021-01-28 18:15:49 -0700 |
| commit | 4f988b792cf8f176c95f3dc52fb5a8217633e890 (patch) | |
| tree | f254e0faf210a3b3503b39473394141faeb5858b /examples | |
| parent | cb8ceba3dd55030731e7372080218a9fd7f44431 (diff) | |
fix #558
Diffstat (limited to 'examples')
| -rw-r--r-- | examples/device/usbtmc/src/usb_descriptors.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/examples/device/usbtmc/src/usb_descriptors.c b/examples/device/usbtmc/src/usb_descriptors.c index 14500b1e4..f1ed1db7c 100644 --- a/examples/device/usbtmc/src/usb_descriptors.c +++ b/examples/device/usbtmc/src/usb_descriptors.c @@ -80,7 +80,8 @@ uint8_t const * tud_descriptor_device_cb(void) TUD_USBTMC_BULK_DESCRIPTORS(/* OUT = */0x01, /* IN = */ 0x81, /* packet size = */USBTMCD_MAX_PACKET_SIZE) #if CFG_TUD_USBTMC_ENABLE_INT_EP -// Interrupt endpoint should be 2 bytes on a FS USB link, but some microcontrollers only allow 8, 16, 32 or 64 for FS +// USBTMC Interrupt xfer always has length of 2, but we use epMaxSize=8 here for compatibility +// with microcontrollers that only allow 8, 16, 32 or 64 for FS endpoints # define TUD_USBTMC_DESC(_itfnum) \ TUD_USBTMC_DESC_MAIN(_itfnum, /* _epCount = */ 3), \ TUD_USBTMC_INT_DESCRIPTOR(/* INT ep # */ 0x82, /* epMaxSize = */ 8, /* bInterval = */16u ) |