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4nes4snes/main.c
Raphaël Assénat 9bcdbb7121 auto detect live
2009-05-02 13:55:11 +00:00

325 lines
8.4 KiB
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/* 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 "oddebug.h"
#include "gamepad.h"
#include "snes.h"
#include "leds.h"
#include "devdesc.h"
static uchar *rt_usbHidReportDescriptor=NULL;
static uchar rt_usbHidReportDescriptorSize=0;
static uchar *rt_usbDeviceDescriptor=NULL;
static uchar rt_usbDeviceDescriptorSize=0;
/* 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)
{
uchar i, j;
// init port C as input with pullup
DDRC = 0x00;
PORTC = 0xff;
/* 1101 1000 bin: activate pull-ups except on USB lines
*
* USB signals are on bit 0 and 2.
*
* Bit 1 is connected with bit 0 (rev.C pcb error), so the pullup
* is not enabled.
* */
PORTD = 0xf8;
/* Usb pin are init as outputs */
DDRD = 0x01 | 0x04;
j = 0;
while(--j){ /* USB Reset by device only required on Watchdog Reset */
i = 0;
while(--i); /* delay >10ms for USB reset */
}
DDRD = 0x00; /* 0000 0000 bin: remove USB reset condition */
/* configure timer 0 for a rate of 12M/(1024 * 256) = 45.78 Hz (~22ms) */
TCCR0 = 5; /* timer 0 prescaler: 1024 */
TCCR2 = (1<<WGM21)|(1<<CS22)|(1<<CS21)|(1<<CS20);
OCR2 = 196; // for 60 hz
}
static uchar reportBuffer[12]; /* buffer for HID reports */
/* ------------------------------------------------------------------------- */
/* ----------------------------- USB interface ----------------------------- */
/* ------------------------------------------------------------------------- */
static uchar idleRates[MAX_REPORTS]; /* in 4 ms units */
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;
int i;
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]);
case USBRQ_HID_GET_IDLE:
if (rq->wValue.bytes[0] > 0 && rq->wValue.bytes[0] <= MAX_REPORTS) {
usbMsgPtr = idleRates + (rq->wValue.bytes[0] - 1);
return 1;
}
break;
case USBRQ_HID_SET_IDLE:
if (rq->wValue.bytes[0]==0) {
for (i=0; i<MAX_REPORTS; i++)
idleRates[i] = rq->wValue.bytes[1];
}
else {
if (rq->wValue.bytes[0] > 0 && rq->wValue.bytes[0] <= MAX_REPORTS) {
idleRates[rq->wValue.bytes[0]-1] = rq->wValue.bytes[1];
}
}
break;
}
} else {
/* no vendor specific requests implemented */
}
return 0;
}
/* ------------------------------------------------------------------------- */
int main(void)
{
char must_report = 0; /* bitfield */
uchar idleCounters[MAX_REPORTS];
int i;
memset(idleCounters, 0, MAX_REPORTS);
curGamepad = snesGetGamepad();
// 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;
//wdt_enable(WDTO_2S);
hardwareInit();
curGamepad->init();
odDebugInit();
usbInit();
curGamepad->update();
sei();
DBG1(0x00, 0, 0);
for(;;){ /* main event loop */
wdt_reset();
// this must be called at each 50 ms or less
usbPoll();
/* Read the controllers at 60hz */
if (TIFR & (1<<OCF2))
{
TIFR = 1<<OCF2;
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);
}
}
}
/* Try to report at the granularity requested by
* the host. */
if (TIFR & (1<<TOV0)) { /* 22 ms timer */
TIFR = 1<<TOV0;
for (i=0; i<curGamepad->num_reports; i++)
{
// 0 means
if(idleRates[i] != 0){
if (idleCounters[i] > 4) {
idleCounters[i] -= 5; /* 22 ms in units of 4 ms */
} else {
// reset the counter and schedule a report for this
idleCounters[i] = idleRates[i];
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;
}
/* ------------------------------------------------------------------------- */
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