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usb_cdc: Add support for detecting a USB level Arduino bootloader request

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Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor
2018-12-05 21:22:34 -05:00
parent c6065e29a6
commit b84ecebf8f
6 changed files with 33 additions and 0 deletions
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12
src/generic/usb_cdc.c
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@@ -402,6 +402,15 @@ usb_req_set_configuration(struct usb_ctrlrequest *req)
}
static struct usb_cdc_line_coding line_coding;
static uint8_t line_control_state;
static void
check_reboot(void)
{
if (line_coding.dwDTERate == 1200 && !(line_control_state & 0x01))
// A baud of 1200 is an Arduino style request to enter the bootloader
usb_request_bootloader();
}
static void
usb_req_set_line_coding(struct usb_ctrlrequest *req)
@@ -412,6 +421,7 @@ usb_req_set_line_coding(struct usb_ctrlrequest *req)
return;
}
usb_do_xfer(&line_coding, sizeof(line_coding), UX_READ);
check_reboot();
}
static void
@@ -432,7 +442,9 @@ usb_req_set_line(struct usb_ctrlrequest *req)
usb_do_stall();
return;
}
line_control_state = req->wValue;
usb_do_xfer(NULL, 0, UX_SEND);
check_reboot();
}
static void