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Diffstat (limited to 'chip/stm32/usb-stm32f3.h')
| -rw-r--r-- | chip/stm32/usb-stm32f3.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/chip/stm32/usb-stm32f3.h b/chip/stm32/usb-stm32f3.h new file mode 100644 index 0000000000..cf4590fa11 --- /dev/null +++ b/chip/stm32/usb-stm32f3.h @@ -0,0 +1,17 @@ +/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved. + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + * + * STM32F3 Family specific USB functionality + */ + +/* + * A device that uses an STM32F3 part will need to define these two functions + * which are used to connect and disconnect the device from the USB bus. This + * is usually accomplished by enabling a pullup on the DP USB line. The pullup + * should be enabled by default so that the STM32 will enumerate correctly in + * DFU mode (which doesn't know how to enable the DP pullup, so it assumes that + * the pullup is always there). + */ +void usb_board_connect(void); +void usb_board_disconnect(void); |