82 lines
1.9 KiB
C++
82 lines
1.9 KiB
C++
#pragma once
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#include <stdint.h>
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#include <avr/io.h>
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namespace adc {
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namespace detail {
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#if defined(__AVR_ATmega328P__)
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/*
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The following works in avr-gcc 5.4.0, but is not legal C++, because ptr's are not legal constexpr's:
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constexpr auto *foo = ptr;
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Workaround is to store the address of the ptr in a uintptr_t and reinterpret_cast it at call site.
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The _SFR_ADDR macro in sfr_defs.h would give the address, but it does that by taking the address of the dereferenced
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pointer and casts it to uint16_t, which is still not a legal constexpr.
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The workaround therefore is to disable the pointer-cast-and-dereference macro _MMIO_BYTE temporarily.
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*/
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#pragma push_macro("_MMIO_BYTE")
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#undef _MMIO_BYTE
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#define _MMIO_BYTE
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struct Registers {
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static constexpr uintptr_t MUX_SEL_ADDR = ADMUX;
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static constexpr uintptr_t CTRL_STAT_A_ADDR = ADCSRA;
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static constexpr uintptr_t DATA_L_ADDR = ADCL;
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static constexpr uintptr_t DATA_H_ADDR = ADCH;
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static constexpr uintptr_t CTRL_STAT_B_ADDR = ADCSRB;
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static constexpr uintptr_t DIG_IN_DIS_ADDR = DIDR0;
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};
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enum class ControlFlagsMUX {
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CHANNEL_SEL_0 = MUX0,
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CHANNEL_SEL_1 = MUX1,
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CHANNEL_SEL_2 = MUX2,
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CHANNEL_SEL_3 = MUX3,
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LEFT_ADJ_RES = ADLAR,
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REF_SEL_0 = REFS0,
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REF_SEL_1 = REFS1,
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};
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enum class ControlFlagsA {
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PRESCALER_SEL_0 = ADPS0,
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PRESCALER_SEL_1 = ADPS1,
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PRESCALER_SEL_2 = ADPS2,
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CONV_COMPLETE_INT_ENABLE = ADIE,
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CONV_COMPLETE = ADIF,
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AUTO_TRIGGER = ADATE,
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START_CONV = ADSC,
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ENABLE = ADEN,
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};
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enum class ControlFlagsB {
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TRIGGER_SRC_0 = ADTS0,
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TRIGGER_SRC_1 = ADTS1,
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TRIGGER_SRC_2 = ADTS2,
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ANALOG_COMP_MUX_ENABLE = ACME,
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};
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enum class ControlFlagsDigInDis {
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DIGITAL_INPUT_DISABLE_0 = ADC0D,
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DIGITAL_INPUT_DISABLE_1 = ADC1D,
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DIGITAL_INPUT_DISABLE_2 = ADC2D,
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DIGITAL_INPUT_DISABLE_3 = ADC3D,
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DIGITAL_INPUT_DISABLE_4 = ADC4D,
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DIGITAL_INPUT_DISABLE_5 = ADC5D,
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};
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#pragma pop_macro("_MMIO_BYTE")
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#else
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#error "This chip is not supported"
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#endif
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} // namespace detail
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} // namespace adc
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