From 27800e7bfd8b01c7a1480333588c040ece6c4859 Mon Sep 17 00:00:00 2001
From: Vegard Storheil Eriksen <zyp@jvnv.net>
Date: Sun, 4 Mar 2012 16:48:40 +0100
Subject: Implemented get_descriptor() and set_address().

---
 main.cpp | 95 +++++++++++++++++++++++++++++++++++++---------------------------
 1 file changed, 55 insertions(+), 40 deletions(-)

diff --git a/main.cpp b/main.cpp
index feb3397..327cd90 100644
--- a/main.cpp
+++ b/main.cpp
@@ -17,50 +17,65 @@ static Pin& usb_dm = PA11;
 static Pin& usb_dp = PA12;
 static Pin& usb_vbus = PA9;
 
+void usb_write(uint32_t* bufp, uint32_t len) {
+	OTG_FS.dev_iep_reg[0].DIEPTSIZ = (1 << 19) | len;
+	//                               PKTCNT
+	OTG_FS.dev_iep_reg[0].DIEPCTL |= (1 << 31) | (1 << 26);
+	//                               EPENA       CNAK
+	
+	len = (len + 3) >> 2;
+	
+	while(len--) {
+		OTG_FS.fifo = *bufp++;
+	}
+}
+
+uint32_t dev_desc[] = {0x02000112, 0x400000ff, 0x56781234, 0x00000000, 0x0100};
+uint32_t conf_desc[] = {0x00090209, 0xc0000100, 0x00};
+
+bool get_descriptor(uint16_t wValue, uint16_t wIndex, uint16_t wLength) {
+	switch(wValue) {
+		case 0x100:
+			usb_write(dev_desc, wLength);
+			return true;
+		case 0x200:
+			usb_write(conf_desc, wLength);
+			return true;
+		default:
+			return false;
+	}
+}
+
+bool set_address(uint16_t wValue, uint16_t wIndex, uint16_t wLength) {
+	OTG_FS.dev_reg.DCFG |= wValue << 4;
+	usb_write(0, 0);
+	return true;
+}
+
 void handle_setup(const uint32_t* bufp) {
 	led_red.toggle();
 	
-	if(bufp[0] == 0x01000680 && bufp[1] == 0x00080000) {
-		OTG_FS.dev_iep_reg[0].DIEPTSIZ = (1 << 19) | 8;
-		//                               PKTCNT
-		OTG_FS.dev_iep_reg[0].DIEPCTL |= (1 << 31) | (1 << 26);
-		//                               EPENA       CNAK
-		OTG_FS.fifo = 0x02000112;
-		OTG_FS.fifo = 0x400000ff;
-	} else if((bufp[0] & 0xffff) == 0x0500) {
-		OTG_FS.dev_reg.DCFG |= ((bufp[0] >> 16) & 0x7f) << 4;
-		
-		OTG_FS.dev_iep_reg[0].DIEPTSIZ = (1 << 19) | 0;
-		//                               PKTCNT
-		OTG_FS.dev_iep_reg[0].DIEPCTL |= (1 << 31) | (1 << 26);
-		//                               EPENA       CNAK
-	} else if(bufp[0] == 0x01000680 && bufp[1] == 0x00120000) {
-		OTG_FS.dev_iep_reg[0].DIEPTSIZ = (1 << 19) | 18;
-		//                               PKTCNT
-		OTG_FS.dev_iep_reg[0].DIEPCTL |= (1 << 31) | (1 << 26);
-		//                               EPENA       CNAK
-		OTG_FS.fifo = 0x02000112;
-		OTG_FS.fifo = 0x400000ff;
-		OTG_FS.fifo = 0x56781234;
-		OTG_FS.fifo = 0x00000000;
-		OTG_FS.fifo = 0x00000100;
-	} else if(bufp[0] == 0x02000680 && bufp[1] == 0x00040000) {
-		OTG_FS.dev_iep_reg[0].DIEPTSIZ = (1 << 19) | 4;
-		//                               PKTCNT
-		OTG_FS.dev_iep_reg[0].DIEPCTL |= (1 << 31) | (1 << 26);
-		//                               EPENA       CNAK
-		OTG_FS.fifo = 0x00090209;
-	} else if(bufp[0] == 0x02000680 && bufp[1] == 0x00090000) {
-		OTG_FS.dev_iep_reg[0].DIEPTSIZ = (1 << 19) | 9;
-		//                               PKTCNT
-		OTG_FS.dev_iep_reg[0].DIEPCTL |= (1 << 31) | (1 << 26);
-		//                               EPENA       CNAK
-		OTG_FS.fifo = 0x00090209;
-		OTG_FS.fifo = 0xc0000100;
-		OTG_FS.fifo = 0x00000000;
-	} else {
-		OTG_FS.dev_iep_reg[0].DIEPCTL |= (1 << 21);
+	uint8_t bmRequestType = bufp[0] & 0xff;
+	uint8_t bRequest = (bufp[0] >> 8) & 0xff;
+	uint16_t wValue = (bufp[0] >> 16) & 0xffff;
+	uint16_t wIndex = bufp[1] & 0xffff;
+	uint16_t wLength = (bufp[1] >> 16) & 0xffff;
+	
+	// GET_DESCRIPTOR
+	if(bmRequestType == 0x80 && bRequest == 0x06) {
+		if(get_descriptor(wValue, wIndex, wLength)) {
+			return;
+		}
 	}
+	
+	// SET_ADDRESS
+	if(bmRequestType == 0x00 && bRequest == 0x05) {
+		if(set_address(wValue, wIndex, wLength)) {
+			return;
+		}
+	}
+	
+	OTG_FS.dev_iep_reg[0].DIEPCTL |= (1 << 21);
 }
 
 static uint32_t buf[16];
-- 
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