writeBit() [1/4]

template<uint8_t DATA_PIN, uint8_t CLOCK_PIN, uint32_t SPI_SPEED>

template<uint8_t BIT>

static void AVRSoftwareSPIOutput< DATA_PIN, CLOCK_PIN, SPI_SPEED >::writeBit ( uint8_t b )

inlinestatic

Write the BIT'th bit out via SPI, setting the data pin then strobing the clock.

Template Parameters

BIT	the bit index in the byte

Parameters

b	the byte to read the bit from

Definition at line 153 of file fastspi_bitbang.h.

                                                                                                      {
        //cli();
        if(b & (1 << BIT)) {
            FastPin<DATA_PIN>::hi();
#ifdef ESP32
            // try to ensure we never have adjacent write opcodes to the same register
            FastPin<CLOCK_PIN>::lo();
            FastPin<CLOCK_PIN>::hi(); CLOCK_HI_DELAY;
            FastPin<CLOCK_PIN>::toggle(); CLOCK_LO_DELAY;
#else
            FastPin<CLOCK_PIN>::hi(); CLOCK_HI_DELAY;
            FastPin<CLOCK_PIN>::lo(); CLOCK_LO_DELAY;
#endif
        } else {
            FastPin<DATA_PIN>::lo();
            FastPin<CLOCK_PIN>::hi(); CLOCK_HI_DELAY;
#ifdef ESP32
            // try to ensure we never have adjacent write opcodes to the same register
            FastPin<CLOCK_PIN>::toggle(); CLOCK_HI_DELAY;
#else
            FastPin<CLOCK_PIN>::lo(); CLOCK_LO_DELAY;
#endif
        }
        //sei();
    }

References CLOCK_HI_DELAY, CLOCK_LO_DELAY, FastPin< PIN >::hi(), FastPin< PIN >::lo(), and FastPin< PIN >::toggle().

Referenced by writeBit(), writeByte(), writeByte(), writeByte(), writeByte(), and writePixels().

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