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Usb.c
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Usb.c
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/*
* Copyright (C) 2017 Johan Bergkvist
*
* This software may be modified and distributed under the terms
* of the MIT license. See the LICENSE file for details.
*/
#include <xc.h>
#include <usb.h>
#include "usb_device.h"
#include "usb_device_generic.h"
uint8_t out_packet[USBGEN_EP_SIZE] @ 0x500;
uint8_t in_packet[USBGEN_EP_SIZE] @ 0x540;
USB_HANDLE out_handle = 0;
USB_HANDLE in_handle = 0;
//---------------------------------------------------------------------------
// USER_USB_CALLBACK_EVENT_HANDLER
//---------------------------------------------------------------------------
bool USER_USB_CALLBACK_EVENT_HANDLER(USB_EVENT event, void *pdata, uint16_t size)
{
switch(event)
{
case EVENT_CONFIGURED:
//
// THE USB port has been configured. Time to enable the endpoints.
//
USBEnableEndpoint(USBGEN_EP_NUM, USB_OUT_ENABLED | USB_IN_ENABLED | USB_HANDSHAKE_ENABLED | USB_DISALLOW_SETUP);
//
// Get a handle to the input ("out" from the host perspective).
//
out_handle = USBGenRead(USBGEN_EP_NUM, out_packet, USBGEN_EP_SIZE);
break;
case EVENT_TRANSFER:
Nop();
break;
case EVENT_SET_DESCRIPTOR:
case EVENT_EP0_REQUEST:
case EVENT_SOF:
case EVENT_SUSPEND:
case EVENT_RESUME:
case EVENT_BUS_ERROR:
default:
break;
}
return true;
}
//---------------------------------------------------------------------------
// SendOk
//
// Sends a two-byte packet with the word "OK" in it to the PC.
//---------------------------------------------------------------------------
void SendOk(void)
{
while(USBHandleBusy(in_handle))
{
USBDeviceTasks();
}
in_packet[0] = 'O';
in_packet[1] = 'K';
in_handle = USBGenWrite(USBGEN_EP_NUM, in_packet, 2);
while(USBHandleBusy(in_handle))
{
USBDeviceTasks();
}
}
//---------------------------------------------------------------------------
// SendFail
//
// Sends a four-byte packet with the word "FAIL" in it to the PC.
//---------------------------------------------------------------------------
void SendFail(void)
{
while(USBHandleBusy(in_handle))
{
USBDeviceTasks();
}
in_packet[0] = 'F';
in_packet[1] = 'A';
in_packet[2] = 'I';
in_packet[3] = 'L';
in_handle = USBGenWrite(USBGEN_EP_NUM, in_packet, 4);
while(USBHandleBusy(in_handle))
{
USBDeviceTasks();
}
}
//---------------------------------------------------------------------------
// SendResult8
//
//
//---------------------------------------------------------------------------
void SendResult8(unsigned char result)
{
while(USBHandleBusy(in_handle))
{
USBDeviceTasks();
}
in_packet[0] = result;
in_handle = USBGenWrite(USBGEN_EP_NUM, in_packet, 1);
while(USBHandleBusy(in_handle))
{
USBDeviceTasks();
}
}
/*
//---------------------------------------------------------------------------
// SendResult32
//
//
//---------------------------------------------------------------------------
void SendResult32(unsigned long result)
{
while(USBHandleBusy(in_handle))
{
USBDeviceTasks();
}
((unsigned long *)in_packet)[0] = result;
in_handle = USBGenWrite(USBGEN_EP_NUM, (BYTE*)&in_packet, 4);
}
*/
//---------------------------------------------------------------------------
// SendDebug
//
//
//---------------------------------------------------------------------------
void SendDebug(unsigned char *data, unsigned char length)
{
unsigned char i;
while(USBHandleBusy(in_handle))
{
USBDeviceTasks();
}
in_packet[0] = 'D';
in_packet[1] = 'E';
in_packet[2] = 'B';
in_packet[3] = 'U';
for (i = 0; i < length; i++)
{
in_packet[4 + i] = data[i];
}
in_handle = USBGenWrite(USBGEN_EP_NUM, in_packet, 4 + length);
while(USBHandleBusy(in_handle))
{
USBDeviceTasks();
}
}
/*
//---------------------------------------------------------------------------
// SendText
//
//
//---------------------------------------------------------------------------
void SendText(const rom char *data)
{
unsigned char i;
while(USBHandleBusy(in_handle))
{
USBDeviceTasks();
}
in_packet[0] = 'T';
in_packet[1] = 'E';
in_packet[2] = 'X';
in_packet[3] = 'T';
for (i = 0; data[i] != 0; i++)
{
in_packet[4 + i] = data[i];
}
in_handle = USBGenWrite(USBGEN_EP_NUM, (BYTE*)&in_packet, 4 + i);
while(USBHandleBusy(in_handle))
{
USBDeviceTasks();
}
}
*/
//---------------------------------------------------------------------------
// SendInPacket
//
//
//---------------------------------------------------------------------------
void SendInPacket(unsigned char *bytes, unsigned char length)
{
unsigned char i;
while(USBHandleBusy(in_handle))
{
USBDeviceTasks();
}
for (i = 0; i < length; i++)
{
in_packet[i] = bytes[i];
}
in_handle = USBGenWrite(USBGEN_EP_NUM, in_packet, length);
while(USBHandleBusy(in_handle))
{
USBDeviceTasks();
}
}