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/*
* Copyright 2020 Daniel Friesel
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#ifndef TIMED_RESISTIVE_LOAD_H
#define TIMED_RESISTIVE_LOAD_H
/*
* Resistance at 25°c
* R1: 986R
* R2: 3K25
* R3: 46K3
* R4: 9K86
*/
class TimedResistiveLoad {
private:
TimedResistiveLoad(const TimedResistiveLoad ©);
public:
TimedResistiveLoad() {}
void setup();
void switchToNone();
void switchTo750(); // 576R (R1 || R2)
void switchTo1K0(); // 986R (R1)
void switchTo2K4(); // 2K44 (R2 || 4)
void switchTo3K3(); // 3K25 (R2)
void switchTo10K(); // 9K86 (R4)
void switchTo47K(); // 46K3 (R3)
/*
* These functions must be inline, as __delay_cycles only works with
* compile-time constants. So they must be part of the compilation unit
* which uses them and cannot easily be wrapped by a function without
* losing accuracy.
*/
inline void __attribute__((always_inline)) nop1K0(unsigned long long int const duration_us)
{
switchTo1K0();
__delay_cycles(F_CPU / 1000000UL * duration_us);
switchToNone();
}
inline void __attribute__((always_inline)) nop2K4(unsigned long long int const duration_us)
{
switchTo2K4();
__delay_cycles(F_CPU / 1000000UL * duration_us);
switchToNone();
}
inline void __attribute__((always_inline)) nop3K3(unsigned long long int const duration_us)
{
switchTo3K3();
__delay_cycles(F_CPU / 1000000UL * duration_us);
switchToNone();
}
inline void __attribute__((always_inline)) nop10K(unsigned long long int const duration_us)
{
switchTo10K();
__delay_cycles(F_CPU / 1000000UL * duration_us);
switchToNone();
}
inline void __attribute__((always_inline)) nop47K(unsigned long long int const duration_us)
{
switchTo47K();
__delay_cycles(F_CPU / 1000000UL * duration_us);
switchToNone();
}
};
extern TimedResistiveLoad timedResistiveLoad;
#endif
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