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2943b80c42
This was a suggestion from bigmessowires. Do a tight loop when reading a chunk of 1024 bytes. It's faster.
84 lines
2.3 KiB
C
84 lines
2.3 KiB
C
/*
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* usbcdc_hw.h
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*
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* Created on: Nov 22, 2020
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* Author: Doug
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*
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* Copyright (C) 2011-2020 Doug Brown
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef HAL_AT90USB646_USBCDC_HW_H_
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#define HAL_AT90USB646_USBCDC_HW_H_
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#include "LUFA/Drivers/USB/USB.h"
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#include "cdc_device_definition.h"
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#include "../../util.h"
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/** Sends a byte over the USB CDC serial port
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*
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* @param byte The byte to send
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*/
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static ALWAYS_INLINE void USBCDC_SendByte(uint8_t byte)
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{
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CDC_Device_SendByte(&VirtualSerial_CDC_Interface, byte);
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}
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/** Sends a block of data over the USB CDC serial port
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*
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* @param data The data to send
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* @param len The number of bytes
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* @return True on success, false on failure
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*/
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static ALWAYS_INLINE bool USBCDC_SendData(uint8_t const *data, uint16_t len)
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{
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return CDC_Device_SendData(&VirtualSerial_CDC_Interface, (char const *)data, len) == ENDPOINT_RWSTREAM_NoError;
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}
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/** Attempts to read a byte from the USB CDC serial port
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*
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* @return The byte read, or -1 if there are no bytes available
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*/
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static ALWAYS_INLINE int16_t USBCDC_ReadByte(void)
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{
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return CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
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}
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/** Reads a byte from the USB CDC serial port. Blocks until one is available.
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*
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* @return The byte read
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*/
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static ALWAYS_INLINE uint8_t USBCDC_ReadByteBlocking(void)
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{
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int16_t b;
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do
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{
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b = USBCDC_ReadByte();
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} while (b < 0);
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return (uint8_t)b;
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}
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/** Forces any transmitted data to be sent over USB immediately
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*
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*/
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static ALWAYS_INLINE inline void USBCDC_Flush(void)
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{
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CDC_Device_Flush(&VirtualSerial_CDC_Interface);
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}
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#endif /* HAL_AT90USB646_USBCDC_HW_H_ */
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