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#include "stm32.h"
#include "rcc.h"
#include "interrupt.h"
#include "thread.h"
#include "time.h"
#include "pin.h"
#include "usb.h"
static Pin& led_green = PD12;
static Pin& led_yellow = PD13;
static Pin& led_red = PD14;
static Pin& led_blue = PD15;
int main() {
// Initialize system timer.
STK.LOAD = 168000000 / 8 / 1000; // 1000 Hz.
STK.CTRL = 0x03;
RCC.enable(RCC.GPIOA);
RCC.enable(RCC.GPIOB);
RCC.enable(RCC.GPIOD);
led_green.set_mode(Pin::Output);
led_yellow.set_mode(Pin::Output);
led_red.set_mode(Pin::Output);
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();
Time::sleep(100);
led_green.off();
led_yellow.on();
Time::sleep(100);
led_yellow.off();
led_red.on();
Time::sleep(100);
led_red.off();
led_blue.on();
Time::sleep(100);
led_blue.off();
}
}
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