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Support for nRF51822 based boards #42

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Support for nRF51822 based boards #42

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sandeepmistry Feb 21, 2015
c44e17e
add support for RedBearLab nRF51822 and RFduino
sandeepmistry Feb 21, 2015
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73 changes: 72 additions & 1 deletion Adafruit_NeoPixel.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -56,7 +56,7 @@ Adafruit_NeoPixel::Adafruit_NeoPixel(uint16_t n, uint8_t p, uint8_t t) : numLEDs
gOffset = 1;
bOffset = 2;
}

}

Adafruit_NeoPixel::~Adafruit_NeoPixel() {
Expand Down Expand Up @@ -823,6 +823,77 @@ void Adafruit_NeoPixel::show(void) {
#error "Sorry, only 48 MHz is supported, please set Tools > CPU Speed to 48 MHz"
#endif

#elif defined(NRF51) || defined(__RFduino__)

#ifdef NRF51
int nRF51pin = Pin_nRF51822_to_Arduino(pin);
#else
int nRF51pin = pin;
#endif
uint8_t *p = pixels, *end = p + numBytes;

// based off of: http://forum.rfduino.com/index.php?topic=787.0
noInterrupts();
while(p < end) {
uint8_t pix = *p++;

if((type & NEO_SPDMASK) == NEO_KHZ800) { // 800 KHz bitstream
for(int i = 7; i >= 0; i--) {
NRF_GPIO->OUTSET = (1UL << nRF51pin);

if(pix & (0x01 << i)) {
__ASM ( \
" NOP\n\t" \
" NOP\n\t" \
" NOP\n\t" \
" NOP\n\t" \
" NOP\n\t" \
);
NRF_GPIO->OUTCLR = (1UL << nRF51pin);

} else {
NRF_GPIO->OUTCLR = (1UL << nRF51pin);
__ASM ( \
" NOP\n\t" \
" NOP\n\t" \
" NOP\n\t" \
);
}
}
} else { // 400 KHz bitstream
for(int i = 7; i >= 0; i--) {
NRF_GPIO->OUTSET = (1UL << nRF51pin);

if(pix & (0x01 << i)) {
__ASM ( \
" NOP\n\t" \
" NOP\n\t" \
" NOP\n\t" \
" NOP\n\t" \
" NOP\n\t" \
" NOP\n\t" \
" NOP\n\t" \
" NOP\n\t" \
" NOP\n\t" \
" NOP\n\t" \
);
NRF_GPIO->OUTCLR = (1UL << nRF51pin);
} else {
NRF_GPIO->OUTCLR = (1UL << nRF51pin);
__ASM ( \
" NOP\n\t" \
" NOP\n\t" \
" NOP\n\t" \
" NOP\n\t" \
" NOP\n\t" \
" NOP\n\t" \
);
}
}
}
}
delayMicroseconds(50); // latch and reset WS2812.
interrupts();

#else // Arduino Due

Expand Down