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#define F_CPU 12000000L
#include <avr/io.h>
#include <avr/delay.h>
#include <avr/wdt.h>
#include <avr/interrupt.h>
#include "usbdrv/usbdrv.h"
static uchar replyBuf[18]= "Hello, World!";
/* device is detected, however unreliably. dunno why. */
static uchar dataReceived, dataLength;
void debug(int i)
{
if (i >= 63) i=63;
PORTB = ~i;
}
USB_PUBLIC uchar usbFunctionSetup(uchar data[8])
{
usbRequest_t* rq = (usbRequest_t*) data;
switch(rq->bRequest)
{
case 0: PORTB |= 1; break;
case 1: PORTB &= ~1; break;
case 2: usbMsgPtr = replyBuf; return sizeof(replyBuf); // pc reads
case 3: // alter byte
PORTB = ~(rq->wIndex.word & 0xFF);
if ((rq->wIndex.word >= 0) && (rq->wIndex.word < sizeof(replyBuf)))
{
replyBuf[rq->wIndex.word] = rq->wValue.word;
}
break;
case 4: // pc writes
dataLength = rq->wLength.word;
debug(dataLength);
dataReceived = 0;
return USB_NO_MSG;
}
return 0;
}
USB_PUBLIC uchar usbFunctionWrite(uchar* data, uchar len)
{
PORTB&=~32;
for (uchar i = 0; dataReceived < dataLength && i < len; i++, dataReceived++)
{
if (0 <= dataReceived && dataReceived < sizeof(replyBuf))
replyBuf[dataReceived] = data[i];
}
return (dataReceived >= dataLength);
}
int main (void)
{
DDRC=0x00;
PORTC=0x00;
DDRB=0xFF;
wdt_enable(WDTO_1S);
/*
for (int i=0;i<20;i++)
{
PORTB|=1;
_delay_ms(50);
PORTB&=~1;
_delay_ms(50);
wdt_reset();
} */
usbInit();
usbDeviceDisconnect();
for (int i=0;i<100;i++)
{
PORTB=~i;
wdt_reset();
_delay_ms(5);
}
usbDeviceConnect();
PORTB=~42;
sei();
while(1)
{
wdt_reset();
usbPoll();
}
return 0; // never reached
}
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