chaining.cpp

avr-g++ -c -mmcu=atmega1280 -I. -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums -ffunction-sections -fdata-sections -finline-limit=3 -fno-inline-small-functions -fno-tree-scev-cprop -fno-split-wide-types -fno-jump-tables  -gstabs -DF_CPU=16000000  -Os -Wall -pedantic -std=c++11

---

WS2812 *WS2812::setLed(uint16_t index, uint8_t r, uint8_t g, uint8_t b) {
	uint16_t pointer = WS2812_FRAMEBUFFER_SIZE(index);

	m_frameBuffer[pointer+0] = r;
	m_frameBuffer[pointer+1] = g;
	m_frameBuffer[pointer+2] = b;
	return this;
}

const WS2812 *WS2812::transmit() {
	// nyi
	return this;
}


------------ With Chaining ------------

	WS2812 m_ledStrip(LEDCOUNT, frameBuffer);
	WS2812 *ledStrip = &m_ledStrip;

	ledStrip
		->setLed(0, 255, 0, 0)
		->setLed(1, 0, 255, 0)
		->setLed(2, 0, 0, 255)
		->transmit();

---------------------------------------

	ledStrip
		.setLed(0, 255, 0, 0)
		->setLed(1, 0, 255, 0)
		->setLed(2, 0, 0, 255)
		->transmit();
 146:	20 e0       	ldi	r18, 0x00	; 0
 148:	4f ef       	ldi	r20, 0xFF	; 255
 14a:	60 e0       	ldi	r22, 0x00	; 0
 14c:	70 e0       	ldi	r23, 0x00	; 0
 14e:	ce 01       	movw	r24, r28
 150:	01 96       	adiw	r24, 0x01	; 1
 152:	28 d0       	rcall	.+80     	; 0x1a4 <_ZN6WS28126setLedEjhhh>
 154:	2f ef       	ldi	r18, 0xFF	; 255
 156:	40 e0       	ldi	r20, 0x00	; 0
 158:	61 e0       	ldi	r22, 0x01	; 1
 15a:	70 e0       	ldi	r23, 0x00	; 0
 15c:	23 d0       	rcall	.+70     	; 0x1a4 <_ZN6WS28126setLedEjhhh>
 15e:	0f ef       	ldi	r16, 0xFF	; 255
 160:	20 e0       	ldi	r18, 0x00	; 0
 162:	40 e0       	ldi	r20, 0x00	; 0
 164:	62 e0       	ldi	r22, 0x02	; 2
 166:	70 e0       	ldi	r23, 0x00	; 0
 168:	1d d0       	rcall	.+58     	; 0x1a4 <_ZN6WS28126setLedEjhhh>
 16a:	1b d0       	rcall	.+54     	; 0x1a2 <_ZN6WS28128transmitEv>
 16c:	2f 9a       	sbi	0x05, 7	; 5
 16e:	2f ef       	ldi	r18, 0xFF	; 255
 170:	84 e3       	ldi	r24, 0x34	; 52
 172:	9c e0       	ldi	r25, 0x0C	; 12
 174:	21 50       	subi	r18, 0x01	; 1
 176:	80 40       	sbci	r24, 0x00	; 0

----------- Without Chaining ----------

	ledStrip.setLed(0, 255, 0, 0);
	ledStrip.setLed(1, 0, 255, 0);
	ledStrip.setLed(2, 0, 0, 255);
	ledStrip.transmit();


	ledStrip.setLed(0, 255, 0, 0);
 146:	20 e0       	ldi	r18, 0x00	; 0
 148:	4f ef       	ldi	r20, 0xFF	; 255
 14a:	60 e0       	ldi	r22, 0x00	; 0
 14c:	70 e0       	ldi	r23, 0x00	; 0
 14e:	ce 01       	movw	r24, r28
 150:	01 96       	adiw	r24, 0x01	; 1
 152:	2e d0       	rcall	.+92     	; 0x1b0 <_ZN6WS28126setLedEjhhh>
 154:	2f ef       	ldi	r18, 0xFF	; 255
 156:	40 e0       	ldi	r20, 0x00	; 0
	ledStrip.setLed(1, 0, 255, 0);
 158:	61 e0       	ldi	r22, 0x01	; 1
 15a:	70 e0       	ldi	r23, 0x00	; 0
 15c:	ce 01       	movw	r24, r28
 15e:	01 96       	adiw	r24, 0x01	; 1
 160:	27 d0       	rcall	.+78     	; 0x1b0 <_ZN6WS28126setLedEjhhh>
 162:	0f ef       	ldi	r16, 0xFF	; 255
 164:	20 e0       	ldi	r18, 0x00	; 0
 166:	40 e0       	ldi	r20, 0x00	; 0
	ledStrip.setLed(2, 0, 0, 255);
 168:	62 e0       	ldi	r22, 0x02	; 2
 16a:	70 e0       	ldi	r23, 0x00	; 0
 16c:	ce 01       	movw	r24, r28
 16e:	01 96       	adiw	r24, 0x01	; 1
 170:	1f d0       	rcall	.+62     	; 0x1b0 <_ZN6WS28126setLedEjhhh>
 172:	ce 01       	movw	r24, r28
 174:	01 96       	adiw	r24, 0x01	; 1
 176:	1b d0       	rcall	.+54     	; 0x1ae <_ZN6WS28128transmitEv>
 178:	2f 9a       	sbi	0x05, 7	; 5
	ledStrip.transmit();
 17a:	2f ef       	ldi	r18, 0xFF	; 255
 17c:	84 e3       	ldi	r24, 0x34	; 52
 17e:	9c e0       	ldi	r25, 0x0C	; 12
 180:	21 50       	subi	r18, 0x01	; 1
 182:	80 40       	sbci	r24, 0x00	; 0