Detailed Description

Macros
#define	HW_ATOMIC(...)

#define	HW_MEM_EEPROM __attribute__((section(".eeprom")))

#define	hw_wait_irq , _hw_wait_irq

#define	hw_waste_cycles(n) __builtin_avr_delay_cycles(n)

Macro Definition Documentation

◆ HW_ATOMIC

#define HW_ATOMIC ( ... )

Value:

  do{                                           \
    uint8_t s = _hw_read(core0,sreg);   \
    hw_disable, interrupts();                   \
    { __VA_ARGS__ }                             \
    _hw_write(core0,sreg,s) ;           \
  }while(0)

Execute a block with interrupts disabled

◆ HW_MEM_EEPROM

#define HW_MEM_EEPROM __attribute__((section(".eeprom")))

Tell the linker to put data in EEPROM memory segment

static uint16_t HW_MEM_EEPROM numbers[16] ; // 16 16-bit numbers in EEPROM

Examples: hwa/atmel/avr/examples/99-02-TCS3200-color-detector/main.c.

◆ hw_wait_irq

#define hw_wait_irq , _hw_wait_irq

Wait for an interrupt (sleep until an interrupt occurs)

hw( wait, irq );

◆ hw_waste_cycles

#define hw_waste_cycles ( n ) __builtin_avr_delay_cycles(n)

Software loop of n CPU clock cycles (only works with compile-time constants).

hw_waste_cycles( 0.5 * HW_SYSHZ ); // At least 0.5 s