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