Set some flags for USB initialization.

2 files changed, 17 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
index f22d170..b137a4a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 *.o
 *.a
 *.elf
+*.swp
 .sconsign.dblite
diff --git a/main.cpp b/main.cpp
index 807c0b0..3ea82b8 100644
--- a/main.cpp
+++ b/main.cpp
@@ -28,6 +28,22 @@ int main() {
 	led_blue.set_mode(Pin::Output);
 	
 	RCC.enable(RCC.OTGFS);
+
+	// USB configuration
+	OTG_FS.reg.GUSBCFG = (1 << 30) | (0xf << 10) | (1 << 9) | (1 << 8);
+	//                   FDMOD       TRDT          HNPCAP     SRPCAP
+
+	// interrupt mask
+	OTG_FS.reg.GINTMSK = (1 << 13) | (1 << 12) | (1 << 11) | (1 << 10) | (1 << 3) | (1 << 2) | (1 << 1);
+	//                   ENUMDNEM    USBRST      USBSUSPM    ESUSPM      SOFM       OTGINT     MMISM
+
+	// device configuration
+	OTG_FS.dev_reg.DCFG = (1 << 2) | 3;
+	//                    NZLSOHSK   DSPD
+
+	// core configuration
+	OTG_FS.reg.GCCFG = (1 << 19);
+	//                 VBUSBSEN
 	
 	while(1) {
 		led_green.on();