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#include <rcc/rcc.h>
#include <gpio/gpio.h>
#include <interrupt/interrupt.h>
#include <timer/timer.h>
#include <os/time.h>
#include <usb/usb.h>
#include <usb/descriptor.h>
auto dev_desc = device_desc(0x200, 0, 0, 0, 64, 0x1234, 0x5678, 0x110, 1, 2, 3, 1);
auto conf_desc = configuration_desc(0, 1, 0, 0xc0, 0);
desc_t dev_desc_p = {sizeof(dev_desc), (void*)&dev_desc};
desc_t conf_desc_p = {sizeof(conf_desc), (void*)&conf_desc};
static Pin usb_dm = GPIOA[11];
static Pin usb_dp = GPIOA[12];
static Pin usb_pu = GPIOA[15];
static PinArray button_inputs = GPIOB.array(0, 10);
static PinArray button_leds = GPIOC.array(0, 10);
static Pin qe1a = GPIOA[0];
static Pin qe1b = GPIOA[1];
static Pin qe2a = GPIOA[6];
static Pin qe2b = GPIOA[7];
static Pin led1 = GPIOA[8];
static Pin led2 = GPIOA[9];
USB_f1 usb(USB, dev_desc_p, conf_desc_p);
class USB_arcin_test : public USB_class_driver {
private:
USB_generic& usb;
uint8_t qe_state;
bool set_buttons(uint16_t wValue, uint16_t wIndex, uint16_t wLength) {
button_inputs.set(~wValue);
usb.write(0, nullptr, 0);
return true;
}
bool get_leds(uint16_t wValue, uint16_t wIndex, uint16_t wLength) {
if(wLength != 4) {
return false;
}
uint32_t buf = (button_leds.get() ^ 0x7ff) | (led1.get() ? 0 : 0x10000) | (led2.get() ? 0 : 0x20000);
usb.write(0, &buf, 4);
return true;
}
void inc_qe() {
switch(qe_state++ & 3) {
case 0:
qe1b.on();
qe2b.on();
break;
case 1:
qe1a.on();
qe2a.on();
break;
case 2:
qe1b.off();
qe2b.off();
break;
case 3:
qe1a.off();
qe2a.off();
break;
}
}
void dec_qe() {
switch(qe_state-- & 3) {
case 0:
qe1a.on();
qe2a.on();
break;
case 1:
qe1b.off();
qe2b.off();
break;
case 2:
qe1a.off();
qe2a.off();
break;
case 3:
qe1b.on();
qe2b.on();
break;
}
}
bool count_qe(uint16_t wValue, uint16_t wIndex, uint16_t wLength) {
int8_t n = wValue & 0xff;
while(n != 0) {
if(n > 0) {
inc_qe();
n--;
} else {
dec_qe();
n++;
}
}
usb.write(0, nullptr, 0);
return true;
}
public:
USB_arcin_test(USB_generic& usbd) : usb(usbd) {
usb.register_driver(this);
}
protected:
virtual SetupStatus handle_setup(uint8_t bmRequestType, uint8_t bRequest, uint16_t wValue, uint16_t wIndex, uint16_t wLength) {
if(bmRequestType == 0xc0 && bRequest == 0xf0) {
return set_buttons(wValue, wIndex, wLength) ? SetupStatus::Ok : SetupStatus::Stall;
}
if(bmRequestType == 0xc0 && bRequest == 0xf1) {
return get_leds(wValue, wIndex, wLength) ? SetupStatus::Ok : SetupStatus::Stall;
}
if(bmRequestType == 0xc0 && bRequest == 0xf2) {
return count_qe(wValue, wIndex, wLength) ? SetupStatus::Ok : SetupStatus::Stall;
}
return SetupStatus::Unhandled;
}
};
USB_arcin_test usb_arcin_test(usb);
uint32_t serial_num() {
uint32_t* uid = (uint32_t*)0x1ffff7ac;
return uid[0] * uid[1] * uid[2];
}
class USB_strings : public USB_class_driver {
private:
USB_generic& usb;
public:
USB_strings(USB_generic& usbd) : usb(usbd) {
usb.register_driver(this);
}
protected:
virtual SetupStatus handle_setup(uint8_t bmRequestType, uint8_t bRequest, uint16_t wValue, uint16_t wIndex, uint16_t wLength) {
// Get string descriptor.
if(bmRequestType == 0x80 && bRequest == 0x06 && (wValue & 0xff00) == 0x0300) {
const void* desc = nullptr;
uint16_t buf[9];
switch(wValue & 0xff) {
case 0:
desc = u"\u0304\u0409";
break;
case 1:
desc = u"\u0308zyp";
break;
case 2:
desc = u"\u0316arcin test";
break;
case 3:
{
buf[0] = 0x0312;
uint32_t id = serial_num();
for(int i = 8; i > 0; i--) {
buf[i] = (id & 0xf) > 9 ? 'A' + (id & 0xf) - 0xa : '0' + (id & 0xf);
id >>= 4;
}
desc = buf;
}
break;
}
if(!desc) {
return SetupStatus::Unhandled;
}
uint8_t len = *(uint8_t*)desc;
if(len > wLength) {
len = wLength;
}
usb.write(0, (uint32_t*)desc, len);
return SetupStatus::Ok;
}
return SetupStatus::Unhandled;
}
};
USB_strings usb_strings(usb);
int main() {
rcc_init();
// Initialize system timer.
STK.LOAD = 72000000 / 8 / 1000; // 1000 Hz.
STK.CTRL = 0x03;
RCC.enable(RCC.GPIOA);
RCC.enable(RCC.GPIOB);
RCC.enable(RCC.GPIOC);
usb_dm.set_mode(Pin::AF);
usb_dm.set_af(14);
usb_dp.set_mode(Pin::AF);
usb_dp.set_af(14);
RCC.enable(RCC.USB);
usb.init();
usb_pu.set_mode(Pin::Output);
usb_pu.on();
button_inputs.set(0x7ff);
button_inputs.set_type(Pin::OpenDrain);
button_inputs.set_mode(Pin::Output);
button_leds.set_mode(Pin::Input);
button_leds.set_pull(Pin::PullUp);
led1.set_mode(Pin::Input);
led1.set_pull(Pin::PullUp);
led2.set_mode(Pin::Input);
led2.set_pull(Pin::PullUp);
qe1a.set(1);
qe1a.set_type(Pin::OpenDrain);
qe1a.set_mode(Pin::Output);
qe1b.set(1);
qe1b.set_type(Pin::OpenDrain);
qe1b.set_mode(Pin::Output);
qe2a.set(1);
qe2a.set_type(Pin::OpenDrain);
qe2a.set_mode(Pin::Output);
qe2b.set(1);
qe2b.set_type(Pin::OpenDrain);
qe2b.set_mode(Pin::Output);
while(1) {
usb.process();
}
}
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