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/* Copyright (c) 2011, Peter Barrett
**
** Permission to use, copy, modify, and/or distribute this software for
** any purpose with or without fee is hereby granted, provided that the
** above copyright notice and this permission notice appear in all copies.
**
** THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
** WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
** WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR
** BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES
** OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
** WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
** ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
** SOFTWARE.
*/
#include "Platform.h"
#include "USBAPI.h"
#include <avr/wdt.h>
#ifdef CDC_ENABLED
// TODO: Should really use the wdt here
// Not currently working for a non-obvious reason
typedef void (*AppPtr_t)(void) __attribute__ ((noreturn));
AppPtr_t Bootloader = (AppPtr_t)(30*1024);
void Reboot()
{
USB.detach();
cli();
Bootloader();
//wdt_enable(WDTO_15MS);
//while(1); // reboot
}
typedef struct
{
u32 dwDTERate;
u8 bCharFormat;
u8 bParityType;
u8 bDataBits;
u8 lineState;
} LineInfo;
static volatile LineInfo _usbLineInfo = { 57600, 0x00, 0x00, 0x00, 0x00 };
#define WEAK __attribute__ ((weak))
extern const CDCDescriptor _cdcInterface PROGMEM;
const CDCDescriptor _cdcInterface =
{
D_IAD(0,2,CDC_COMMUNICATION_INTERFACE_CLASS,CDC_ABSTRACT_CONTROL_MODEL,1),
// CDC communication interface
D_INTERFACE(CDC_ACM_INTERFACE,1,CDC_COMMUNICATION_INTERFACE_CLASS,CDC_ABSTRACT_CONTROL_MODEL,0),
D_CDCCS(CDC_HEADER,0x10,0x01), // Header (1.10 bcd)
D_CDCCS(CDC_CALL_MANAGEMENT,1,1), // Device handles call management (not)
D_CDCCS4(CDC_ABSTRACT_CONTROL_MANAGEMENT,6), // SET_LINE_CODING, GET_LINE_CODING, SET_CONTROL_LINE_STATE supported
D_CDCCS(CDC_UNION,CDC_ACM_INTERFACE,CDC_DATA_INTERFACE), // Communication interface is master, data interface is slave 0
D_ENDPOINT(USB_ENDPOINT_IN (CDC_ENDPOINT_ACM),USB_ENDPOINT_TYPE_INTERRUPT,0x10,0x40),
// CDC data interface
D_INTERFACE(CDC_DATA_INTERFACE,2,CDC_DATA_INTERFACE_CLASS,0,0),
D_ENDPOINT(USB_ENDPOINT_OUT(CDC_ENDPOINT_OUT),USB_ENDPOINT_TYPE_BULK,0x40,0),
D_ENDPOINT(USB_ENDPOINT_IN (CDC_ENDPOINT_IN ),USB_ENDPOINT_TYPE_BULK,0x40,0)
};
int WEAK CDC_GetInterface(u8* interfaceNum)
{
interfaceNum[0] += 2; // uses 2
return USB_SendControl(TRANSFER_PGM,&_cdcInterface,sizeof(_cdcInterface));
}
bool WEAK CDC_Setup(Setup& setup)
{
u8 r = setup.bRequest;
u8 requestType = setup.bmRequestType;
if (REQUEST_DEVICETOHOST_CLASS_INTERFACE == requestType)
{
if (CDC_GET_LINE_CODING == r)
{
USB_SendControl(0,(void*)&_usbLineInfo,7);
return true;
}
}
if (REQUEST_HOSTTODEVICE_CLASS_INTERFACE == requestType)
{
if (CDC_SET_LINE_CODING == r)
{
USB_RecvControl((void*)&_usbLineInfo,7);
return true;
}
if (CDC_SET_CONTROL_LINE_STATE == r)
{
_usbLineInfo.lineState = setup.wValueL;
if (_usbLineInfo.dwDTERate == 115200 && _usbLineInfo.lineState == 0) // Emulate DTR reset hack
Reboot();
return true;
}
}
return false;
}
int _serialPeek = -1;
void Serial_::begin(uint16_t baud_count)
{
}
void Serial_::end(void)
{
}
int Serial_::available(void)
{
u8 avail = USB_Available(CDC_RX);
if (_serialPeek != -1)
avail++;
return avail;
}
// peek is nasty
int Serial_::peek(void)
{
if (_serialPeek == -1)
_serialPeek = read();
return _serialPeek;
}
int Serial_::read(void)
{
int c;
if (_serialPeek != -1)
{
c = _serialPeek;
_serialPeek = -1;
} else {
c = USB_Recv(CDC_RX);
}
return c;
}
void Serial_::flush(void)
{
USB_Flush(CDC_TX);
}
void Serial_::write(uint8_t c)
{
USB_Send(CDC_TX,&c,1);
}
Serial_ Serial;
#endif
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