mirror of
https://github.com/raphnet/4nes4snes
synced 2024-11-14 13:05:03 -05:00
340 lines
8.7 KiB
C
340 lines
8.7 KiB
C
/* Name: main.c
|
|
* Project: Multiple NES/SNES to USB converter
|
|
* Author: Raphael Assenat <raph@raphnet.net>
|
|
* Copyright: (C) 2007-2009 Raphael Assenat <raph@raphnet.net>
|
|
* License: GPLv2
|
|
* Tabsize: 4
|
|
* Comments: Based on HID-Test by Christian Starkjohann
|
|
*/
|
|
#include <avr/io.h>
|
|
#include <avr/interrupt.h>
|
|
#include <avr/pgmspace.h>
|
|
#include <avr/wdt.h>
|
|
#include <util/delay.h>
|
|
#include <string.h>
|
|
|
|
#include "usbdrv.h"
|
|
#include "gamepad.h"
|
|
|
|
#include "fournsnes.h"
|
|
|
|
#include "devdesc.h"
|
|
|
|
static uchar *rt_usbHidReportDescriptor=NULL;
|
|
static uchar rt_usbHidReportDescriptorSize=0;
|
|
static uchar *rt_usbDeviceDescriptor=NULL;
|
|
static uchar rt_usbDeviceDescriptorSize=0;
|
|
|
|
|
|
#if defined(__AVR_ATmega168__) || defined(__AVR_ATmega168A__) || \
|
|
defined(__AVR_ATmega168P__) || defined(__AVR_ATmega328__) || \
|
|
defined(__AVR_ATmega328P__) || defined(__AVR_ATmega88__) || \
|
|
defined(__AVR_ATmega88A__) || defined(__AVR_ATmega88P__) || \
|
|
defined(__AVR_ATmega88PA__)
|
|
#define AT168_COMPATIBLE
|
|
#endif
|
|
|
|
/* The maximum number of independent reports that are supported. */
|
|
#define MAX_REPORTS 8
|
|
|
|
PROGMEM int usbDescriptorStringSerialNumber[] = {
|
|
USB_STRING_DESCRIPTOR_HEADER(4),
|
|
'1','0','0','0'
|
|
};
|
|
|
|
int usbDescriptorStringDevice[] = {
|
|
USB_STRING_DESCRIPTOR_HEADER(DEVICE_STRING_LENGTH),
|
|
DEFAULT_PROD_STRING
|
|
};
|
|
|
|
char usbDescriptorConfiguration[] = { 0 }; // dummy
|
|
|
|
uchar my_usbDescriptorConfiguration[] = { /* USB configuration descriptor */
|
|
9, /* sizeof(usbDescriptorConfiguration): length of descriptor in bytes */
|
|
USBDESCR_CONFIG, /* descriptor type */
|
|
18 + 7 * USB_CFG_HAVE_INTRIN_ENDPOINT + 9, 0,
|
|
/* total length of data returned (including inlined descriptors) */
|
|
1, /* number of interfaces in this configuration */
|
|
1, /* index of this configuration */
|
|
0, /* configuration name string index */
|
|
#if USB_CFG_IS_SELF_POWERED
|
|
USBATTR_SELFPOWER, /* attributes */
|
|
#else
|
|
USBATTR_BUSPOWER, /* attributes */
|
|
#endif
|
|
USB_CFG_MAX_BUS_POWER/2, /* max USB current in 2mA units */
|
|
/* interface descriptor follows inline: */
|
|
9, /* sizeof(usbDescrInterface): length of descriptor in bytes */
|
|
USBDESCR_INTERFACE, /* descriptor type */
|
|
0, /* index of this interface */
|
|
0, /* alternate setting for this interface */
|
|
USB_CFG_HAVE_INTRIN_ENDPOINT, /* endpoints excl 0: number of endpoint descriptors to follow */
|
|
USB_CFG_INTERFACE_CLASS,
|
|
USB_CFG_INTERFACE_SUBCLASS,
|
|
USB_CFG_INTERFACE_PROTOCOL,
|
|
0, /* string index for interface */
|
|
//#if (USB_CFG_DESCR_PROPS_HID & 0xff) /* HID descriptor */
|
|
9, /* sizeof(usbDescrHID): length of descriptor in bytes */
|
|
USBDESCR_HID, /* descriptor type: HID */
|
|
0x01, 0x01, /* BCD representation of HID version */
|
|
0x00, /* target country code */
|
|
0x01, /* number of HID Report (or other HID class) Descriptor infos to follow */
|
|
0x22, /* descriptor type: report */
|
|
USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH, 0, /* total length of report descriptor */
|
|
//#endif
|
|
#if USB_CFG_HAVE_INTRIN_ENDPOINT /* endpoint descriptor for endpoint 1 */
|
|
7, /* sizeof(usbDescrEndpoint) */
|
|
USBDESCR_ENDPOINT, /* descriptor type = endpoint */
|
|
0x81, /* IN endpoint number 1 */
|
|
0x03, /* attrib: Interrupt endpoint */
|
|
8, 0, /* maximum packet size */
|
|
USB_CFG_INTR_POLL_INTERVAL, /* in ms */
|
|
#endif
|
|
};
|
|
|
|
|
|
static Gamepad *curGamepad;
|
|
|
|
|
|
/* ----------------------- hardware I/O abstraction ------------------------ */
|
|
|
|
static void hardwareInit(void)
|
|
{
|
|
|
|
/* PORTB
|
|
*
|
|
* Bit Description Direction Level/pu
|
|
* 0 Jumpers common Out 0
|
|
* 1 JP1 In 1
|
|
* 2 JP2 In 1
|
|
* 3 MOSI In 1
|
|
* 4 MISO In 1
|
|
* 5 SCK In 1
|
|
* 6 -
|
|
* 7 -
|
|
*/
|
|
DDRB = 0x01;
|
|
PORTB = 0xFE;
|
|
|
|
// init port C as input with pullup
|
|
DDRC = 0x00;
|
|
PORTC = 0xff;
|
|
|
|
/*
|
|
* For port D, activate pull-ups on all lines except the D+, D- and bit 1.
|
|
*
|
|
* For historical reasons (a mistake on an old PCB), bit 1
|
|
* is now always connected with bit 0. So bit 1 configured
|
|
* as an input without pullup.
|
|
*
|
|
* Usb pin are init as output, low. (device reset). They are released
|
|
* later when usbReset() is called.
|
|
*/
|
|
PORTD = 0xf8;
|
|
DDRD = 0x01 | 0x04;
|
|
|
|
/* Configure timers */
|
|
#if defined(AT168_COMPATIBLE)
|
|
TCCR2A= (1<<WGM21);
|
|
TCCR2B=(1<<CS22)|(1<<CS21)|(1<<CS20);
|
|
OCR2A=196; // for 60 hz
|
|
#else
|
|
TCCR2 = (1<<WGM21)|(1<<CS22)|(1<<CS21)|(1<<CS20);
|
|
OCR2 = 196; // for 60 hz
|
|
#endif
|
|
}
|
|
|
|
static void usbReset(void)
|
|
{
|
|
/* [...] a single ended zero or SE0 can be used to signify a device
|
|
reset if held for more than 10mS. A SE0 is generated by holding
|
|
both th D- and D+ low (< 0.3V).
|
|
*/
|
|
|
|
PORTD &= ~(0x01 | 0x04); // Set D+ and D- to 0
|
|
DDRD |= 0x01 | 0x04;
|
|
_delay_ms(15);
|
|
DDRD &= ~(0x01 | 0x04);
|
|
}
|
|
|
|
#if defined(AT168_COMPATIBLE)
|
|
|
|
#define mustPollControllers() (TIFR2 & (1<<OCF2A))
|
|
#define clrPollControllers() do { TIFR2 = 1<<OCF2A; } while(0)
|
|
|
|
#else
|
|
|
|
#define mustPollControllers() (TIFR & (1<<OCF2))
|
|
#define clrPollControllers() do { TIFR = 1<<OCF2; } while(0)
|
|
|
|
#endif
|
|
|
|
|
|
static uchar reportBuffer[12]; /* buffer for HID reports */
|
|
|
|
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
/* ----------------------------- USB interface ----------------------------- */
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
uchar usbFunctionDescriptor(struct usbRequest *rq)
|
|
{
|
|
if ((rq->bmRequestType & USBRQ_TYPE_MASK) != USBRQ_TYPE_STANDARD)
|
|
return 0;
|
|
|
|
if (rq->bRequest == USBRQ_GET_DESCRIPTOR)
|
|
{
|
|
// USB spec 9.4.3, high byte is descriptor type
|
|
switch (rq->wValue.bytes[1])
|
|
{
|
|
case USBDESCR_DEVICE:
|
|
usbMsgPtr = rt_usbDeviceDescriptor;
|
|
return rt_usbDeviceDescriptorSize;
|
|
case USBDESCR_HID_REPORT:
|
|
usbMsgPtr = rt_usbHidReportDescriptor;
|
|
return rt_usbHidReportDescriptorSize;
|
|
case USBDESCR_CONFIG:
|
|
usbMsgPtr = my_usbDescriptorConfiguration;
|
|
return sizeof(my_usbDescriptorConfiguration);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static uchar reportPos=0;
|
|
|
|
uchar usbFunctionSetup(uchar data[8])
|
|
{
|
|
usbRequest_t *rq = (void *)data;
|
|
|
|
usbMsgPtr = reportBuffer;
|
|
|
|
/* class request type */
|
|
if((rq->bmRequestType & USBRQ_TYPE_MASK) == USBRQ_TYPE_CLASS){
|
|
switch (rq->bRequest)
|
|
{
|
|
case USBRQ_HID_GET_REPORT:
|
|
/* wValue: ReportType (highbyte), ReportID (lowbyte) */
|
|
reportPos=0;
|
|
return curGamepad->buildReport(reportBuffer, rq->wValue.bytes[0]);
|
|
|
|
}
|
|
} else {
|
|
/* no vendor specific requests implemented */
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
int main(void)
|
|
{
|
|
char must_report = 0; /* bitfield */
|
|
int i;
|
|
unsigned char run_mode;
|
|
|
|
|
|
hardwareInit();
|
|
|
|
_delay_ms(10); /* let pins settle */
|
|
run_mode = (PINB & 0x06)>>1;
|
|
|
|
switch(run_mode)
|
|
{
|
|
// Close JP1 to disable live auto-detect
|
|
case 2:
|
|
disableLiveAutodetect();
|
|
break;
|
|
|
|
case 1:
|
|
case 3:
|
|
case 4:
|
|
break;
|
|
}
|
|
|
|
curGamepad = fournsnesGetGamepad();
|
|
|
|
// configure report descriptor according to
|
|
// the current gamepad
|
|
rt_usbHidReportDescriptor = curGamepad->reportDescriptor;
|
|
rt_usbHidReportDescriptorSize = curGamepad->reportDescriptorSize;
|
|
|
|
if (curGamepad->deviceDescriptor != 0)
|
|
{
|
|
rt_usbDeviceDescriptor = (void*)curGamepad->deviceDescriptor;
|
|
rt_usbDeviceDescriptorSize = curGamepad->deviceDescriptorSize;
|
|
}
|
|
else
|
|
{
|
|
// use descriptor from devdesc.c
|
|
//
|
|
rt_usbDeviceDescriptor = (void*)usbDescrDevice;
|
|
rt_usbDeviceDescriptorSize = getUsbDescrDevice_size();
|
|
}
|
|
|
|
// patch the config descriptor with the HID report descriptor size
|
|
my_usbDescriptorConfiguration[25] = rt_usbHidReportDescriptorSize;
|
|
|
|
usbReset();
|
|
curGamepad->init();
|
|
usbInit();
|
|
|
|
curGamepad->update();
|
|
|
|
sei();
|
|
|
|
for(;;){ /* main event loop */
|
|
wdt_reset();
|
|
|
|
// this must be called at each 50 ms or less
|
|
usbPoll();
|
|
|
|
/* Read the controllers at 60hz */
|
|
if (mustPollControllers())
|
|
{
|
|
clrPollControllers();
|
|
|
|
curGamepad->update();
|
|
|
|
/* Check what will have to be reported */
|
|
for (i=0; i<curGamepad->num_reports; i++) {
|
|
if (curGamepad->changed(i+1)) {
|
|
must_report |= (1<<i);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
if(must_report)
|
|
{
|
|
for (i = 0; i < curGamepad->num_reports; i++)
|
|
{
|
|
if ((must_report & (1<<i)) == 0)
|
|
continue;
|
|
|
|
if (usbInterruptIsReady())
|
|
{
|
|
char len;
|
|
|
|
len = curGamepad->buildReport(reportBuffer, i+1);
|
|
usbSetInterrupt(reportBuffer, len);
|
|
|
|
while (!usbInterruptIsReady())
|
|
{
|
|
usbPoll();
|
|
wdt_reset();
|
|
}
|
|
}
|
|
}
|
|
|
|
must_report = 0;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* ------------------------------------------------------------------------- */
|