Update gcn64txrx code for multiple channels

Makefile

@@ -16,6 +16,18 @@ all: $(HEXFILE)
 clean:
 	rm -f $(PROGNAME).elf $(PROGNAME).hex $(PROGNAME).map $(OBJS)
 
+gcn64txrx0.o: gcn64txrx.S
+	$(CC) $(CFLAGS) -c $< -o $@ -DSUFFIX=0 -DGCN64_DATA_BIT=0
+
+gcn64txrx1.o: gcn64txrx.S
+	$(CC) $(CFLAGS) -c $< -o $@ -DSUFFIX=1 -DGCN64_DATA_BIT=2
+
+gcn64txrx2.o: gcn64txrx.S
+	$(CC) $(CFLAGS) -c $< -o $@ -DSUFFIX=2 -DGCN64_DATA_BIT=1
+
+gcn64txrx3.o: gcn64txrx.S
+	$(CC) $(CFLAGS) -c $< -o $@ -DSUFFIX=3 -DGCN64_DATA_BIT=3
+
 %.o: %.S
 	$(CC) $(CFLAGS) -c $< -o $@
 

Makefile.inc

@@ -1,3 +1,3 @@
-OBJS=main.o usb.o usbpad.o mappings.o gcn64_protocol.o n64.o gamecube.o usart1.o bootloader.o eeprom.o config.o hiddata.o usbstrings.o intervaltimer.o version.o gcn64txrx.o gamepads.o
+OBJS=main.o usb.o usbpad.o mappings.o gcn64_protocol.o n64.o gamecube.o usart1.o bootloader.o eeprom.o config.o hiddata.o usbstrings.o intervaltimer.o version.o gcn64txrx0.o gcn64txrx1.o gcn64txrx2.o gcn64txrx3.o gamepads.o
 VERSIONSTR=\"3.2.1\"
 VERSIONSTR_SHORT=\"3.2\"

gamecube.c

@@ -118,7 +118,7 @@ static char gamecubeUpdate()
 	tmpdata[1] = GC_GETSTATUS2;
 	tmpdata[2] = GC_GETSTATUS3(gc_rumbling);
 
-	count = gcn64_transaction(tmpdata, 3, tmpdata, GC_GETSTATUS_REPLY_LENGTH);
+	count = gcn64_transaction(GCN64_CHANNEL_0, tmpdata, 3, tmpdata, GC_GETSTATUS_REPLY_LENGTH);
 	if (count != GC_GETSTATUS_REPLY_LENGTH) {
 		return 1;
 	}

gcn64_protocol.c

@@ -31,13 +31,19 @@
 	#define GCN64_DATA_PORT	PORTD
 	#define GCN64_DATA_DDR	DDRD
 	#define GCN64_DATA_PIN	PIND
-	#define GCN64_DATA_BIT	(1<<0)
+	#define GCN64_DATA_BIT0	(1<<0)
+	#define GCN64_DATA_BIT1	(1<<1)
+	#define GCN64_DATA_BIT2	(1<<2)
+	#define GCN64_DATA_BIT3	(1<<3)
 	#define GCN64_BIT_NUM_S	"0" // for asm
 #else
 	#define GCN64_DATA_PORT	PORTA
 	#define GCN64_DATA_DDR	DDRA
 	#define GCN64_DATA_PIN	PINA
-	#define GCN64_DATA_BIT	(1<<0)
+	#define GCN64_DATA_BIT0	(1<<0)
+	#define GCN64_DATA_BIT1	(1<<2) // This is not an error
+	#define GCN64_DATA_BIT2	(1<<1) // This is not an error
+	#define GCN64_DATA_BIT3	(1<<3)
 	#define GCN64_BIT_NUM_S	"0" // for asm
 #endif
 
@@ -46,11 +52,11 @@
 void gcn64protocol_hwinit(void)
 {
 	// data as input
-	GCN64_DATA_DDR &= ~(GCN64_DATA_BIT);
+	GCN64_DATA_DDR &= ~(GCN64_DATA_BIT0 | GCN64_DATA_BIT1 | GCN64_DATA_BIT2 | GCN64_DATA_BIT3);
 
 	// keep data low. By toggling the direction, we make the
 	// pin act as an open-drain output.
-	GCN64_DATA_PORT &= ~GCN64_DATA_BIT;
+	GCN64_DATA_PORT &= ~(GCN64_DATA_BIT0 | GCN64_DATA_BIT1 | GCN64_DATA_BIT2 | GCN64_DATA_BIT3);
 
 	/* debug bit PORTB4 (MISO) */
 	DDRB |= 0x10;
@@ -59,11 +65,15 @@ void gcn64protocol_hwinit(void)
 
 /**
  * \brief Send n data bytes + stop bit, wait for answer.
- * \return The number of bytes received, 0 on timeout/error.
  *
- * The result is in gcn64_workbuf.
+ * \param chn Channel (0 to 3)
+ * \param tx Data to be transmitted
+ * \param tx_len Transmission length
+ * \param rx Reception buffer
+ * \param rx_max Buffer size
+ * \return The number of bytes received, 0 on timeout/error.
  */
-unsigned char gcn64_transaction(const unsigned char *tx, int tx_len, unsigned char *rx, unsigned char rx_max)
+unsigned char gcn64_transaction(unsigned char chn, const unsigned char *tx, int tx_len, unsigned char *rx, unsigned char rx_max)
 {
 	int count;
 	unsigned char sreg = SREG;
@@ -81,8 +91,8 @@ unsigned char gcn64_transaction(const unsigned char *tx, int tx_len, unsigned ch
 #ifdef DISABLE_INTS_DURING_COMM
 	cli();
 #endif
-	gcn64_sendBytes(tx, tx_len);
-	count = gcn64_receiveBytes(rx, rx_max);
+	gcn64_sendBytes0(tx, tx_len);
+	count = gcn64_receiveBytes0(rx, rx_max);
 	SREG = sreg;
 
 	if (count == 0xff) {
@@ -119,14 +129,14 @@ unsigned char gcn64_transaction(const unsigned char *tx, int tx_len, unsigned ch
 #if (GC_GETID != 	N64_GET_CAPABILITIES)
 #error N64 vs GC detection commnad broken
 #endif
-int gcn64_detectController(void)
+int gcn64_detectController(unsigned char chn)
 {
 	unsigned char tmp = GC_GETID;
 	unsigned char count;
 	unsigned short id;
 	unsigned char data[4];
 
-	count = gcn64_transaction(&tmp, 1, data, sizeof(data));
+	count = gcn64_transaction(chn, &tmp, 1, data, sizeof(data));
 	if (count == 0) {
 		return CONTROLLER_IS_ABSENT;
 	}

gcn64_protocol.h

@@ -160,7 +160,12 @@
 #define GC_KEY_ENTER			0x61
 
 void gcn64protocol_hwinit(void);
-int gcn64_detectController(void);
-unsigned char gcn64_transaction(const unsigned char *tx, int tx_len, unsigned char *rx, unsigned char rx_max);
+
+#define GCN64_CHANNEL_0			0
+#define GCN64_CHANNEL_1			1
+#define GCN64_CHANNEL_2			2
+#define GCN64_CHANNEL_3			3
+int gcn64_detectController(unsigned char chn);
+unsigned char gcn64_transaction(unsigned char chn, const unsigned char *tx, int tx_len, unsigned char *rx, unsigned char rx_max);
 
 #endif // _gcn64_protocol_h__

gcn64txrx.S

@@ -1,8 +1,20 @@
 #include <avr/io.h>
 
+; When compiling, you must define the following.
+;
+; SUFFIX         : The suffix for exported function (eg: Set to 0 to generate gcn64_sendBytes0)
+; GCN64_DATA_BIT : The bit number in the port.
+;
+; Port and Pin IOs are defined below.
+;
+
+#define CONCAT(a,b)	a##b
+#define EXPORT_SYMBOL(a, b)	.global CONCAT(a,b)
+#define FUNCTION(a, b)		CONCAT(a,b)
+
 .text
-.global gcn64_sendBytes
-.global gcn64_receiveBytes
+EXPORT_SYMBOL(gcn64_sendBytes, SUFFIX)
+EXPORT_SYMBOL(gcn64_receiveBytes, SUFFIX)
 
 #define xl  r26
 #define xh  r27
@@ -24,7 +36,7 @@
 	#define GCN64_DATA_DDR  _SFR_IO_ADDR(DDRD)
 	#define GCN64_DATA_PIN  _SFR_IO_ADDR(PIND)
 #endif
-#define GCN64_DATA_BIT	0
+;#define GCN64_DATA_BIT	0
 
 #if F_CPU != 16000000L
 #error Only 16MHz clock supported
@@ -50,7 +62,7 @@
 	; r24,r25 : dstbuf
 	; r22 : max bytes (for fututre use)
 	; return: count in r24,r25 (0xff: Error, 0xfe: Overflow [max_bytes too low])
-gcn64_receiveBytes:
+FUNCTION(gcn64_receiveBytes, SUFFIX):
 	clr xl
 	clr xh
 	mov zl, r24
@@ -149,7 +161,7 @@ rxdone:
 	* A stop bit is added at thy end of the packet.
 	*
 	************************************************/
-gcn64_sendBytes:
+FUNCTION(gcn64_sendBytes, SUFFIX):
 	; Move r23,r24 pointer to z
 	mov zl, r24
 	mov zh, r25

gcn64txrx.h

@@ -1,7 +1,10 @@
 #ifndef _gcn64txrx_h__
 #define _gcn64txrx_h__
 
-void gcn64_sendBytes(const unsigned char *data, unsigned char n_bytes);
+void gcn64_sendBytes0(const unsigned char *data, unsigned char n_bytes);
+void gcn64_sendBytes1(const unsigned char *data, unsigned char n_bytes);
+void gcn64_sendBytes2(const unsigned char *data, unsigned char n_bytes);
+void gcn64_sendBytes3(const unsigned char *data, unsigned char n_bytes);
 
 /**
  * \brief Receive up to \max_bytes bytes
@@ -9,6 +12,9 @@ void gcn64_sendBytes(const unsigned char *data, unsigned char n_bytes);
  * \param max_bytes The maximum number of bytes
  * \return The number of received bytes. 0xFF in case of error, 0xFE in case of overflow (max_bytes too small)
  */
-unsigned char gcn64_receiveBytes(unsigned char *dstbuf, unsigned char max_bytes);
+unsigned char gcn64_receiveBytes0(unsigned char *dstbuf, unsigned char max_bytes);
+unsigned char gcn64_receiveBytes1(unsigned char *dstbuf, unsigned char max_bytes);
+unsigned char gcn64_receiveBytes2(unsigned char *dstbuf, unsigned char max_bytes);
+unsigned char gcn64_receiveBytes3(unsigned char *dstbuf, unsigned char max_bytes);
 
 #endif // _gcn64txrx_h__

hiddata.c

@@ -76,7 +76,7 @@ uint8_t hiddata_set_report(const struct usb_request *rq, const uint8_t *dat, uin
 
 static void hiddata_processCommandBuffer(void)
 {
-	//unsigned char channel;
+	unsigned char channel;
 #ifdef DEBUG
 	int i;
 #endif
@@ -95,8 +95,8 @@ static void hiddata_processCommandBuffer(void)
 		case RQ_GCN64_RAW_SI_COMMAND:
 			// TODO : Range checking
 			// cmdbuf[] : RQ, CHN, LEN, data[]
-			//channel = cmdbuf[1];
-			cmdbuf_len = gcn64_transaction(cmdbuf+3, cmdbuf[2], cmdbuf + 3, CMDBUF_SIZE-3);
+			channel = cmdbuf[1];
+			cmdbuf_len = gcn64_transaction(channel, cmdbuf+3, cmdbuf[2], cmdbuf + 3, CMDBUF_SIZE-3);
 			cmdbuf[2] = cmdbuf_len;
 			cmdbuf_len += 3; // Answer: RQ, CHN, LEN, data[]
 			break;

main.c

@@ -235,7 +235,7 @@ unsigned char current_pad_type = CONTROLLER_IS_ABSENT;
 
 Gamepad *detectPad(void)
 {
-	current_pad_type = gcn64_detectController();
+	current_pad_type = gcn64_detectController(GCN64_CHANNEL_0);
 
 	switch (current_pad_type)
 	{

n64.c

@@ -60,7 +60,7 @@ static char initRumble(void)
 	tmpdata[2] = 0x01;
 	memset(tmpdata+3, 0x80, 32);
 
-	count = gcn64_transaction(tmpdata, 35, data, sizeof(data));
+	count = gcn64_transaction(GCN64_CHANNEL_0, tmpdata, 35, data, sizeof(data));
 	if (count == 1)
 		return 0;
 
@@ -76,7 +76,7 @@ static char controlRumble(char enable)
 	tmpdata[1] = 0xc0;
 	tmpdata[2] = 0x1b;
 	memset(tmpdata+3, enable ? 0x01 : 0x00, 32);
-	count = gcn64_transaction(tmpdata, 35, data, sizeof(data));
+	count = gcn64_transaction(GCN64_CHANNEL_0, tmpdata, 35, data, sizeof(data));
 	if (count == 1)
 		return 0;
 
@@ -101,7 +101,7 @@ static char n64Update(void)
 	 * Bit 1 tells is if there was something connected that has been removed.
 	 */
 	tmpdata[0] = N64_GET_CAPABILITIES;
-	count = gcn64_transaction(tmpdata, 1, caps, sizeof(caps));
+	count = gcn64_transaction(GCN64_CHANNEL_0, tmpdata, 1, caps, sizeof(caps));
 	if (count != N64_CAPS_REPLY_LENGTH) {
 		// a failed read could mean the pack or controller was gone. Init
 		// will be necessary next time we detect a pack is present.
@@ -172,7 +172,7 @@ static char n64Update(void)
 	}
 
 	tmpdata[0] = N64_GET_STATUS;
-	count = gcn64_transaction(tmpdata, 1, status, sizeof(status));
+	count = gcn64_transaction(GCN64_CHANNEL_0, tmpdata, 1, status, sizeof(status));
 	if (count != N64_GET_STATUS_REPLY_LENGTH) {
 		return -1;
 	}
@@ -274,7 +274,7 @@ static char n64Probe(void)
 		_delay_ms(30);
 
 		tmp = N64_GET_CAPABILITIES;
-		count = gcn64_transaction(&tmp, 1, data, sizeof(data));
+		count = gcn64_transaction(GCN64_CHANNEL_0, &tmp, 1, data, sizeof(data));
 
 		if (count == N64_CAPS_REPLY_LENGTH) {
 			return 1;