diff options
Diffstat (limited to 'src/class/cdc/cdc_device.c')
| -rw-r--r-- | src/class/cdc/cdc_device.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/class/cdc/cdc_device.c b/src/class/cdc/cdc_device.c index ab9addc93..49e13c4b7 100644 --- a/src/class/cdc/cdc_device.c +++ b/src/class/cdc/cdc_device.c @@ -227,8 +227,10 @@ tusb_error_t cdcd_open(uint8_t rhport, tusb_desc_interface_t const * p_interface {
if ( CDC_COMM_SUBCLASS_ABSTRACT_CONTROL_MODEL != p_interface_desc->bInterfaceSubClass) return TUSB_ERROR_CDC_UNSUPPORTED_SUBCLASS;
+ // Only support AT commands, no protocol and vendor specific commands.
if ( !(tu_within(CDC_COMM_PROTOCOL_ATCOMMAND, p_interface_desc->bInterfaceProtocol, CDC_COMM_PROTOCOL_ATCOMMAND_CDMA) ||
- 0xff == p_interface_desc->bInterfaceProtocol) )
+ p_interface_desc->bInterfaceProtocol == CDC_COMM_PROTOCOL_NONE ||
+ p_interface_desc->bInterfaceProtocol == 0xff ) )
{
return TUSB_ERROR_CDC_UNSUPPORTED_PROTOCOL;
}
|