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Undid accidental regression

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This commit is contained in:
BlackMark 2019-08-15 18:49:09 +02:00
parent d991959bff
commit 571f28ab05
1 changed files with 23 additions and 15 deletions
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38
io.hpp
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@ -127,17 +127,23 @@ enum class Bus {
namespace detail {
/*
The following works in avr-gcc 5.4.0, but is not legal C++, because ptr's are not legal constexpr's
The following works in avr-gcc 5.4.0, but is not legal C++, because ptr's are not legal constexpr's:
constexpr auto *foo = ptr;
Workaround is to store the the address of the ptr in a uintptr_t and reinterpret_cast it at call site
For this the sfr_defs.h provides a macro which returns the address of a register
Workaround is to store the the address of the ptr in a uintptr_t and reinterpret_cast it at call site.
The _SFR_ADDR macro in sfr_defs.h would give the address, but it does that by taking the address of the dereferenced
pointer and casts it to uint16_t, which is still not a legal constexpr.
The workaround therefore is to disable the pointer cast and dereference macro _MMIO_BYTE temporarily.
*/
#pragma push_macro("_MMIO_BYTE")
#undef _MMIO_BYTE
#define _MMIO_BYTE
#ifdef PORT_A_AVAILABLE
static constexpr uintptr_t PORT_A_DIR_REG_ADDR = _SFR_ADDR(DDRA);
static constexpr uintptr_t PORT_A_OUTPUT_REG_ADDR = _SFR_ADDR(PORTA);
static constexpr uintptr_t PORT_A_INPUT_REG_ADDR = _SFR_ADDR(PINA);
static constexpr uintptr_t PORT_A_DIR_REG_ADDR = DDRA;
static constexpr uintptr_t PORT_A_OUTPUT_REG_ADDR = PORTA;
static constexpr uintptr_t PORT_A_INPUT_REG_ADDR = PINA;
#else
static constexpr uintptr_t PORT_A_DIR_REG_ADDR = 0;
static constexpr uintptr_t PORT_A_OUTPUT_REG_ADDR = 0;
@ -146,9 +152,9 @@ static constexpr uintptr_t PORT_A_INPUT_REG_ADDR = 0;
#ifdef PORT_B_AVAILABLE
static constexpr uintptr_t PORT_B_DIR_REG_ADDR = _SFR_ADDR(DDRB);
static constexpr uintptr_t PORT_B_OUTPUT_REG_ADDR = _SFR_ADDR(PORTB);
static constexpr uintptr_t PORT_B_INPUT_REG_ADDR = _SFR_ADDR(PINB);
static constexpr uintptr_t PORT_B_DIR_REG_ADDR = DDRB;
static constexpr uintptr_t PORT_B_OUTPUT_REG_ADDR = PORTB;
static constexpr uintptr_t PORT_B_INPUT_REG_ADDR = PINB;
#else
static constexpr uintptr_t PORT_B_DIR_REG_ADDR = 0;
static constexpr uintptr_t PORT_B_OUTPUT_REG_ADDR = 0;
@ -156,9 +162,9 @@ static constexpr uintptr_t PORT_B_INPUT_REG_ADDR = 0;
#endif
#ifdef PORT_C_AVAILABLE
static constexpr uintptr_t PORT_C_DIR_REG_ADDR = _SFR_ADDR(DDRC);
static constexpr uintptr_t PORT_C_OUTPUT_REG_ADDR = _SFR_ADDR(PORTC);
static constexpr uintptr_t PORT_C_INPUT_REG_ADDR = _SFR_ADDR(PINC);
static constexpr uintptr_t PORT_C_DIR_REG_ADDR = DDRC;
static constexpr uintptr_t PORT_C_OUTPUT_REG_ADDR = PORTC;
static constexpr uintptr_t PORT_C_INPUT_REG_ADDR = PINC;
#else
static constexpr uintptr_t PORT_C_DIR_REG_ADDR = 0;
static constexpr uintptr_t PORT_C_OUTPUT_REG_ADDR = 0;
@ -166,15 +172,17 @@ static constexpr uintptr_t PORT_C_INPUT_REG_ADDR = 0;
#endif
#ifdef PORT_D_AVAILABLE
static constexpr uintptr_t PORT_D_DIR_REG_ADDR = _SFR_ADDR(DDRD);
static constexpr uintptr_t PORT_D_OUTPUT_REG_ADDR = _SFR_ADDR(PORTD);
static constexpr uintptr_t PORT_D_INPUT_REG_ADDR = _SFR_ADDR(PIND);
static constexpr uintptr_t PORT_D_DIR_REG_ADDR = DDRD;
static constexpr uintptr_t PORT_D_OUTPUT_REG_ADDR = PORTD;
static constexpr uintptr_t PORT_D_INPUT_REG_ADDR = PIND;
#else
static constexpr uintptr_t PORT_D_DIR_REG_ADDR = 0;
static constexpr uintptr_t PORT_D_OUTPUT_REG_ADDR = 0;
static constexpr uintptr_t PORT_D_INPUT_REG_ADDR = 0;
#endif
#pragma pop_macro("_MMIO_BYTE")
static constexpr auto getBus(const P pin)
{
// Upper 4 bits of pin encode which port this pin is on