unleashed-firmware/lib/cyfral/cyfral_emulator.h
DrZlo13 1f761d7fbb
[FL-84] iButton app, dallas emulate + cyfral read, cyfral emulate (#253)
* maxim crc function
* one wire template device and ds1990 classes
* 3 fields for addr
* cyfral emulator lib
* add cyfral read mode, refract rendering and events
* add ADC1_IN14, add adc interrupt
* cyfral read mode
* rename and move api-hal includes folder
* build onewire libs only if we build app
* start in mode 0
2020-11-25 10:25:13 +03:00

95 lines
2.2 KiB
C++

#pragma once
#include "flipper.h"
#include "flipper_v2.h"
class CyfralTiming {
public:
constexpr static const uint8_t ZERO_HIGH = 50;
constexpr static const uint8_t ZERO_LOW = 70;
constexpr static const uint8_t ONE_HIGH = 100;
constexpr static const uint8_t ONE_LOW = 70;
};
class CyfralEmulator {
private:
void send_nibble(uint8_t nibble);
void send_byte(uint8_t data);
inline void send_bit(bool bit);
const GpioPin* emulate_pin_record;
public:
CyfralEmulator(const GpioPin* emulate_pin);
~CyfralEmulator();
void send(uint8_t* data, uint8_t count = 1, uint8_t repeat = 1);
void start(void);
void stop(void);
};
// 7 = 0 1 1 1
// B = 1 0 1 1
// D = 1 1 0 1
// E = 1 1 1 0
void CyfralEmulator::send_nibble(uint8_t nibble) {
for(uint8_t i = 0; i < 4; i++) {
bool bit = nibble & (0b1000 >> i);
send_bit(bit);
}
}
void CyfralEmulator::send_byte(uint8_t data) {
for(uint8_t i = 0; i < 8; i++) {
bool bit = data & (0b10000000 >> i);
send_bit(bit);
}
}
void CyfralEmulator::send_bit(bool bit) {
if(!bit) {
gpio_write(&ibutton_gpio, false);
delay_us(CyfralTiming::ZERO_LOW);
gpio_write(&ibutton_gpio, true);
delay_us(CyfralTiming::ZERO_HIGH);
gpio_write(&ibutton_gpio, false);
delay_us(CyfralTiming::ZERO_LOW);
} else {
gpio_write(&ibutton_gpio, true);
delay_us(CyfralTiming::ONE_HIGH);
gpio_write(&ibutton_gpio, false);
delay_us(CyfralTiming::ONE_LOW);
}
}
CyfralEmulator::CyfralEmulator(const GpioPin* emulate_pin) {
emulate_pin_record = emulate_pin;
}
CyfralEmulator::~CyfralEmulator() {
}
void CyfralEmulator::send(uint8_t* data, uint8_t count, uint8_t repeat) {
osKernelLock();
__disable_irq();
for(uint8_t i = 0; i < repeat; i++) {
// start sequence
send_nibble(0x01);
// send data
for(uint8_t i = 0; i < count; i++) {
send_byte(data[i]);
}
}
__enable_irq();
osKernelUnlock();
}
void CyfralEmulator::start(void) {
gpio_init(emulate_pin_record, GpioModeOutputOpenDrain);
gpio_write(emulate_pin_record, false);
}
void CyfralEmulator::stop(void) {
gpio_init(emulate_pin_record, GpioModeAnalog);
}