diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/arch.h | 2 | ||||
| -rw-r--r-- | include/arch/msp430fr5994lp/driver/timed_resistive_load.h | 72 |
2 files changed, 74 insertions, 0 deletions
diff --git a/include/arch.h b/include/arch.h index 877af62..1911271 100644 --- a/include/arch.h +++ b/include/arch.h @@ -10,6 +10,8 @@ class Arch { void setup(); void idle_loop(); void idle(); + + // Delay functions are not exact void delay_us(unsigned int const us); void delay_ms(unsigned int const ms); void sleep_ms(unsigned int const ms); diff --git a/include/arch/msp430fr5994lp/driver/timed_resistive_load.h b/include/arch/msp430fr5994lp/driver/timed_resistive_load.h new file mode 100644 index 0000000..6e7996c --- /dev/null +++ b/include/arch/msp430fr5994lp/driver/timed_resistive_load.h @@ -0,0 +1,72 @@ +#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 |