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InternetButton.cpp
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InternetButton.cpp
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#include "InternetButton.h"
#include "math.h"
//----------------- Button ----------------//
uint8_t pin = 3;
uint8_t b1 = 4;
uint8_t b2 = 5;
uint8_t b3 = 6;
uint8_t b4 = 7;
Adafruit_NeoPixel ring = Adafruit_NeoPixel(PIXEL_COUNT, pin, PIXEL_TYPE);
ADXL362 accelerometer;
InternetButton::InternetButton(){
}
void InternetButton::begin(){
ring.begin();
ring.show();
accelerometer.begin(); // Setup SPI protocol, issue device soft reset
accelerometer.beginMeasure(); // Switch ADXL362 to measure mode
accelerometer.checkAllControlRegs(); // Burst Read all Control Registers, to check for proper setup
pinMode(b1, INPUT_PULLUP);
pinMode(b2, INPUT_PULLUP);
pinMode(b3, INPUT_PULLUP);
pinMode(b4, INPUT_PULLUP);
}
void InternetButton::begin(int i){
if(i == 1 || i == 0){
pin = 17;
b1 = 1;
b2 = 2;
b3 = 3;
b4 = 4;
}
ring.begin();
ring.setPin(pin);
ring.show();
accelerometer.begin(); // Setup SPI protocol, issue device soft reset
accelerometer.beginMeasure(); // Switch ADXL362 to measure mode
accelerometer.checkAllControlRegs(); // Burst Read all Control Registers, to check for proper setup
pinMode(b1, INPUT_PULLUP);
pinMode(b2, INPUT_PULLUP);
pinMode(b3, INPUT_PULLUP);
pinMode(b4, INPUT_PULLUP);
}
void InternetButton::ledOn(uint8_t i, uint8_t r, uint8_t g, uint8_t b){
//i-1 shifts the location from human readable to the right index for the LEDs
if(i == 12){
ring.setPixelColor(0, ring.Color(r,g,b));
ring.setPixelColor(10, ring.Color(r,g,b));
}
else{
ring.setPixelColor(i-1, ring.Color(r,g,b));
}
ring.show();
}
void InternetButton::smoothLedOn(float i, uint8_t r, uint8_t g, uint8_t b){
//uint8_t intI = lrintf(i);
//Serial.print("intI: ");
//Serial.println(intI);
//float differ = i-(float)intI + 0.5;
//Serial.print("differ: ");
//Serial.println(differ);
float tempI;
float differ = modff(i, &tempI);
uint8_t intI = (uint8_t)tempI;
// checks to see if it's reeeeally close to being an integer
//if(abs(differ) < 0.01){
// intI-1 shifts the location from human readable to the right index for the LEDs
// ring.setPixelColor(intI-1, ring.Color(r,g,b));
// Serial.println("tripped int check");
//}
//else {
// diff > 0 means that it's closer to the lower one
float differ1 = 1.0-differ;
//differ1 = logf(differ1);
//differ = logf(differ);
if(differ > 0.5){
differ1 /= 2;
//ring.setPixelColor(intI-2, ring.Color((int)(differ1*r),(int)(differ1*g),(int)(differ1*b)));
ring.setPixelColor(intI-1, ring.Color((int)(differ1*r),(int)(differ1*g),(int)(differ1*b)));
ring.setPixelColor(intI, ring.Color((int)(differ*r),(int)(differ*g),(int)(differ*b)));
}
else {
differ /= 2;
//ring.setPixelColor(intI-2, ring.Color((int)(differ*r),(int)(differ*g),(int)(differ*b)));
ring.setPixelColor(intI-1, ring.Color((int)(differ1*r),(int)(differ1*g),(int)(differ1*b)));
ring.setPixelColor(intI, ring.Color((int)(differ*r),(int)(differ*g),(int)(differ*b)));
}
//}
ring.show();
}
void InternetButton::ledOff(uint8_t i){
ledOn(i,0,0,0);
}
void InternetButton::allLedsOff(){
for(int i = 0; i<PIXEL_COUNT; i++){
ring.setPixelColor(i, ring.Color(0, 0, 0));
}
ring.show();
}
void InternetButton::allLedsOn(uint8_t r, uint8_t g, uint8_t b){
for(int i = 0; i<PIXEL_COUNT; i++){
ring.setPixelColor(i, ring.Color(r, g, b));
}
ring.show();
}
uint8_t InternetButton::buttonOn(uint8_t i){
if(b1 == 4){
return !digitalRead(i+3);
}
else {
return !digitalRead(i);
}
}
uint8_t InternetButton::allButtonsOn(){
if(!digitalRead(b1) && !digitalRead(b2) && !digitalRead(b3) && !digitalRead(b4)) {
return 1;
}
else {
return 0;
}
}
uint8_t InternetButton::allButtonsOff(){
if(digitalRead(b1) && digitalRead(b2) && digitalRead(b3) && digitalRead(b4)) {
return 1;
}
else {
return 0;
}
}
void InternetButton::rainbow(uint8_t wait) {
uint16_t i, j;
for(j=0; j<256; j++) { // 1 cycle of all colors on wheel
for(i=0; i< 12; i++) {
uint8_t WheelPos = ((i * 256 / ring.numPixels()) + j) & 255;
if(WheelPos < 85) {
ring.setPixelColor(i,ring.Color(WheelPos * 3, 255 - WheelPos * 3, 0));
} else if(WheelPos < 170) {
WheelPos -= 85;
ring.setPixelColor(i,ring.Color(255 - WheelPos * 3, 0, WheelPos * 3));
} else {
WheelPos -= 170;
ring.setPixelColor(i,ring.Color(0, WheelPos * 3, 255 - WheelPos * 3));
}
}
ring.show();
delay(wait);
}
}
int InternetButton::readX(){
return accelerometer.readX();
}
int InternetButton::readY(){
return accelerometer.readY();
}
int InternetButton::readZ(){
return accelerometer.readZ();
}
int InternetButton::readX16(){
return accelerometer.readX16();
}
int InternetButton::readY16(){
return accelerometer.readY16();
}
int InternetButton::readZ16(){
return accelerometer.readZ16();
}
//Thanks christophevg!
uint8_t InternetButton::lowestLed(){
float rads = atan2(accelerometer.readY16(),accelerometer.readX16());
uint8_t ledPos = (uint8_t)(12 - (rads/(M_PI/6) - 3)) % 12;
return ledPos;
}
void InternetButton::playSong(String song){
char inputStr[200];
song.toCharArray(inputStr,200);
Serial.println(inputStr);
char *note = strtok(inputStr,",");
char *duration = strtok(NULL,",");
playNote(note,atoi(duration));
while(duration != NULL){
note = strtok(NULL,",");
Serial.println(note);
duration = strtok(NULL,", \n");
Serial.println(duration);
//if(atoi(duration) <= 0){
// break;
//}
playNote(note,atoi(duration));
}
}
void InternetButton::playNote(String note, int duration){
int noteNum = 0;
int octave = 5;
int freq = 256;
//if(9 - int(command.charAt(1)) != null){
char octavo[5];
String tempString = note.substring(1,2);
tempString.toCharArray(octavo,5);
octave = atoi(octavo);
//}
if(duration != 0){
duration = 1000/duration;
}
switch(note.charAt(0)){
case 'C':
noteNum = 0;
break;
case 'D':
noteNum = 2;
break;
case 'E':
noteNum = 4;
break;
case 'F':
noteNum = 5;
break;
case 'G':
noteNum = 7;
break;
case 'A':
noteNum = 9;
break;
case 'B':
noteNum = 11;
break;
case 'R': // Rest note
octave = -1;
break;
default:
break;
//return -1;
}
// based on equation at http://www.phy.mtu.edu/~suits/NoteFreqCalcs.html and the Verdi tuning
// fn = f0*(2^1/12)^n where n = number of half-steps from the reference frequency f0
freq = float(256*pow(1.05946,( 12.0*(octave-4) +noteNum)));
// C4^ (2^1/12)^ 12 half-steps in an octave ^how many extra half-steps within that octave, 0 for a C
tone(D0,int(freq),duration);
delay(duration);
noTone(D0);
//return freq;
}
/*
Arduino Library for Analog Devices ADXL362 - Micropower 3-axis accelerometer
go to http://www.analog.com/ADXL362 for datasheet
License: CC BY-SA 3.0: Creative Commons Share-alike 3.0. Feel free
to use and abuse this code however you'd like. If you find it useful
please attribute, and SHARE-ALIKE!
Created June 2012
by Anne Mahaffey - hosted on http://annem.github.com/ADXL362
Modified Mars 2014
by pixelk
Modified for Spark Core/Button October 2014
by jenesaisdiq
*/
const int slaveSelectPin = A2;
ADXL362::ADXL362() {}
//
// begin()
// Initial SPI setup, soft reset of device
//
void ADXL362::begin() {
pinMode(slaveSelectPin, OUTPUT);
SPI.begin();
SPI.setDataMode(SPI_MODE0); //CPHA = CPOL = 0 MODE = 0
delay(500);
// soft reset
mgperLSB = 1;
SPIwriteOneRegister(XL362_SOFT_RESET, 0x52); // Write to SOFT RESET, "R"
delay(10);
#ifdef ADXL362_DEBUG
Serial.println("Soft Reset\n");
#endif
}
//
// beginMeasure()
// turn on Measurement mode - required after reset
//
void ADXL362::beginMeasure() {
uint8_t temp = SPIreadOneRegister(XL362_POWER_CTL); // read Reg 2D before modifying for measure mode
#ifdef ADXL362_DEBUG
Serial.print( "Setting Measeurement Mode - Reg XL362_POWER_CTL before = ");
Serial.print(temp);
#endif
// turn on measurement mode
temp = (temp & 0b11111100) | XL362_POWER_FLAG_MEASURE_RUNING; // turn on measurement bit in Reg XL362_POWER_CTL
SPIwriteOneRegister(XL362_POWER_CTL, temp); // Write to XL362_POWER_CTL, Measurement Mode
delay(10);
#ifdef ADXL362_DEBUG
temp = SPIreadOneRegister(XL362_POWER_CTL);
Serial.print( ", Reg XL362_POWER_CTL after = ");
Serial.println(temp);
#endif
}
//reading off the 8-bit register as documented in the ADXL362 spec
//IMPORTANT to make it a signed 8-bit int so that the data is interpreted correctly
int ADXL362::readX(){
int8_t XDATA = SPIreadOneRegister(0x08);
//#ifdef ADXL362_DEBUG
// Serial.print( "XDATA = ");
// Serial.println(XDATA);
//#endif
return (int)XDATA;
}
int ADXL362::readY(){
int8_t YDATA = SPIreadOneRegister(0x09);
//#ifdef ADXL362_DEBUG
// Serial.print( "\tYDATA = ");
// Serial.println(YDATA);
//#endif
return (int)YDATA;
}
int ADXL362::readZ(){
int8_t ZDATA = SPIreadOneRegister(0x0A);
//#ifdef ADXL362_DEBUG
// Serial.print( "\tZDATA = ");
// Serial.println(ZDATA);
//#endif
return (int)ZDATA;
}
//
// readXData(), readYData(), readZData(), readTemp()
// Read X, Y, Z, and Temp registers
//
int ADXL362::readX16(){
int16_t XDATA = SPIreadTwoRegisters(XL362_XDATA_L);
#ifdef ADXL362_DEBUG
Serial.print( "XDATA = ");
Serial.println(XDATA);
#endif
return XDATA;
}
int ADXL362::readY16(){
int16_t YDATA = SPIreadTwoRegisters(XL362_YDATA_L);
#ifdef ADXL362_DEBUG
Serial.print( "\tYDATA = ");
Serial.println(YDATA);
#endif
return YDATA;
}
int ADXL362::readZ16(){
int16_t ZDATA = SPIreadTwoRegisters(XL362_ZDATA_L);
#ifdef ADXL362_DEBUG
Serial.print( "\tZDATA = ");
Serial.println(ZDATA);
#endif
return ZDATA;
}
//Temperature only has a 16-bit version, so read two 8-bit regs
//worth knowing that this is an INTERNAL temperature measurement, so doesn't reflect the environment accurately
int16_t ADXL362::readTemp(){
int16_t TEMP = SPIreadTwoRegisters(XL362_TEMP_L);
//#ifdef ADXL362_DEBUG
// Serial.print("\tTEMP = ");
// Serial.println(TEMP);
//#endif
return TEMP;
}
void ADXL362::readXYZTData(short &XData, short &YData, short &ZData, float &Temperature){
// burst SPI read
// A burst read of all three axis is required to guarantee all measurements correspond to same sample time
digitalWrite(slaveSelectPin, LOW);
SPI.transfer(0x0B); // read instruction
SPI.transfer(XL362_XDATA_L); // Start at XData Reg
XData = SPI.transfer(0x00);
XData = XData + ((short)SPI.transfer(0x00) << 8);
YData = SPI.transfer(0x00);
YData = YData + ((short)SPI.transfer(0x00) << 8);
ZData = SPI.transfer(0x00);
ZData = ZData + ((short)SPI.transfer(0x00) << 8);
short RawTemperature = SPI.transfer(0x00);
RawTemperature = RawTemperature + ((short)SPI.transfer(0x00) << 8);
Temperature = (float)RawTemperature * 0.065;
digitalWrite(slaveSelectPin, HIGH);
#ifdef ADXL362_DEBUG
Serial.print( "XDATA = "); Serial.print(XData);
Serial.print( "\tYDATA = "); Serial.print(YData);
Serial.print( "\tZDATA = "); Serial.print(ZData);
Serial.println( "\tTemperature = "); Serial.println(Temperature);
#endif
}
void ADXL362::readXYZmg(int &X, int &Y, int &Z){
// burst SPI read
// A burst read of all three axis is required to guarantee all measurements correspond to same sample time
digitalWrite(slaveSelectPin, LOW);
SPI.transfer(0x0B); // read instruction
SPI.transfer(XL362_XDATA_L); // Start at XData Reg
short XData = SPI.transfer(0x00);
XData = XData + ((short)SPI.transfer(0x00) << 8);
short YData = SPI.transfer(0x00);
YData = YData + ((short)SPI.transfer(0x00) << 8);
short ZData = SPI.transfer(0x00);
ZData = ZData + ((short)SPI.transfer(0x00) << 8);
digitalWrite(slaveSelectPin, HIGH);
X = (int)XData * mgperLSB;
Y = (int)YData * mgperLSB;
Z = (int)ZData * mgperLSB;
#ifdef ADXL362_DEBUG
Serial.print( "x = "); Serial.print(X);
Serial.print( "\ty = "); Serial.print(Y);
Serial.println( "\tz = "); Serial.print(Z);
#endif
}
void ADXL362::XYZmgtoRPT(int X, int Y, int Z, float &Rho, float &Phi, float &Theta){
Rho = atan2(float(X), sqrt(pow(float(Y),2)+pow(float(Z),2)));
Rho *= 180/M_PI;
Phi = atan2(float(Y), sqrt(pow(float(X),2)+pow(float(Z),2)));
Phi *= 180/M_PI;
Theta = atan2(sqrt(pow(float(X),2)+pow(float(Y),2)),float(Z));
Theta *= 180/M_PI;
}
void ADXL362::checkAllControlRegs(){
//uint8_t filterCntlReg = SPIreadOneRegister(0x2C);
//uint8_t ODR = filterCntlReg & 0x07; Serial.print("ODR = "); Serial.println(ODR, HEX);
//uint8_t ACT_INACT_CTL_Reg = SPIreadOneRegister(0x27); Serial.print("ACT_INACT_CTL_Reg = "); Serial.println(ACT_INACT_CTL_Reg, HEX);
digitalWrite(slaveSelectPin, LOW);
SPI.transfer(0x0B); // read instruction
SPI.transfer(0x20); // Start burst read at Reg 20
Serial.println("Start Burst Read of all Control Regs - Library version 6-24-2012:");
Serial.print("Reg XL362_THRESH_ACT_L = B"); Serial.println(SPI.transfer(0x00), BIN);
Serial.print("Reg XL362_THRESH_ACT_H = B"); Serial.println(SPI.transfer(0x00), BIN);
Serial.print("Reg XL362_TIME_ACT = B"); Serial.println(SPI.transfer(0x00), BIN);
Serial.print("Reg XL362_THRESH_INACT_L = B"); Serial.println(SPI.transfer(0x00), BIN);
Serial.print("Reg XL362_THRESH_INACT_H = B"); Serial.println(SPI.transfer(0x00), BIN);
Serial.print("Reg XL362_TIME_INACT_L = B"); Serial.println(SPI.transfer(0x00), BIN);
Serial.print("Reg XL362_TIME_INACT_H = B"); Serial.println(SPI.transfer(0x00), BIN);
Serial.print("Reg XL362_ACT_INACT_CTL = B"); Serial.println(SPI.transfer(0x00), BIN);
Serial.print("Reg XL362_FIFO_CONTROL = B"); Serial.println(SPI.transfer(0x00), BIN);
Serial.print("Reg XL362_FIFO_SAMPLES = B"); Serial.println(SPI.transfer(0x00), BIN);
Serial.print("Reg XL362_INTMAP1 = B"); Serial.println(SPI.transfer(0x00), BIN);
Serial.print("Reg XL362_INTMAP2 = B"); Serial.println(SPI.transfer(0x00), BIN);
Serial.print("Reg XL362_FILTER_CTL = B"); Serial.println(SPI.transfer(0x00), BIN);
Serial.print("Reg XL362_POWER_CTL = B"); Serial.println(SPI.transfer(0x00), BIN);
Serial.print("Reg XL362_SELF_TEST = B"); Serial.println(SPI.transfer(0x00), BIN);
digitalWrite(slaveSelectPin, HIGH);
}
void ADXL362::setRange(uint8_t Range){
// Modify range (+-2g +-4g +-8g - ADXL362 Datasheep Page 33
// Choose RangeFlag between XL362_FILTER_FLAG_2G (default), XL362_FILTER_FLAG_4G, XL362_FILTER_FLAG_8G
uint8_t temp = SPIreadOneRegister(XL362_FILTER_CTL); // read Reg XL362_FILTER_CTL before modifying
#ifdef ADXL362_DEBUG
Serial.print( "Setting Measurement Range - Reg XL362_FILTER_CTL before = ");
Serial.print(temp);
#endif
switch ( Range ) { // Range affects converting LSB to mg
case XL362_FILTER_FLAG_2G:
mgperLSB = 1;
break;
case XL362_FILTER_FLAG_4G:
mgperLSB = 2;
break;
case XL362_FILTER_FLAG_8G:
mgperLSB = 4;
break;
default:
// YOU SHOULDN'T BE HERE !
mgperLSB = 1;
break;
}
temp = temp & 0b00111111 | Range;
SPIwriteOneRegister(XL362_FILTER_CTL, temp); // Write to XL362_FILTER_CTL
delay(10);
#ifdef ADXL362_DEBUG
temp = SPIreadOneRegister(XL362_FILTER_CTL);
Serial.print( ", Reg after = ");
Serial.println(temp);
#endif
}
void ADXL362::setBandwidth(uint8_t BandWidth){
// modify Bandwidth - ADXL362 Datasheep Page 33
// Choose Bandwidth between XL362_FILTER_FLAG_HBW (default), XL362_FILTER_FLAG_FBW
uint8_t temp = SPIreadOneRegister(XL362_FILTER_CTL); // read Reg XL362_FILTER_CTL before modifying
#ifdef ADXL362_DEBUG
Serial.print( "Setting BandWidth - Reg XL362_FILTER_CTL before = ");
Serial.print(temp);
#endif
temp = temp & 0b11101111 | BandWidth;
SPIwriteOneRegister(XL362_FILTER_CTL, temp); // Write to XL362_FILTER_CTL
delay(10);
#ifdef ADXL362_DEBUG
temp = SPIreadOneRegister(XL362_FILTER_CTL);
Serial.print( ", Reg after = ");
Serial.println(temp);
#endif
}
void ADXL362::setOutputDatarate(uint8_t ODR){
// modify Output Data Rate - ADXL362 Datasheep Page 33
// Choose ODR between XL362_FILTER_FLAG_ODR12, XL362_FILTER_FLAG_ODR25, XL362_FILTER_FLAG_ODR50, XL362_FILTER_FLAG_ODR100 (default), XL362_FILTER_FLAG_ODR200 , XL362_FILTER_FLAG_ODR400
uint8_t temp = SPIreadOneRegister(XL362_FILTER_CTL); // read Reg XL362_FILTER_CTL before modifying
#ifdef ADXL362_DEBUG
Serial.print( "Setting Output Data Rate - Reg XL362_FILTER_CTL before = ");
Serial.print(temp);
#endif
temp = temp & 0b11111000 | ODR;
SPIwriteOneRegister(XL362_FILTER_CTL, temp); // Write to XL362_FILTER_CTL
delay(10);
#ifdef ADXL362_DEBUG
temp = SPIreadOneRegister(XL362_FILTER_CTL);
Serial.print( ", Reg after = ");
Serial.println(temp);
#endif
}
void ADXL362::setNoiseLevel(uint8_t NoiseLevel){
// modify Noise Level - ADXL362 Datasheep Page 34
// Choose NoiseLevel between XL362_POWER_FLAG_NOISE_NORMAL (default), XL362_POWER_FLAG_NOISE_LOW, XL362_POWER_FLAG_NOISE_ULTRALOW
uint8_t temp = SPIreadOneRegister(XL362_POWER_CTL); // read Reg XL362_FILTER_CTL before modifying
#ifdef ADXL362_DEBUG
Serial.print( "Setting Output Data Rate - Reg XL362_POWER_CTL before = ");
Serial.print(temp);
#endif
temp = temp & 0b11001111 | NoiseLevel;
SPIwriteOneRegister(XL362_POWER_CTL, temp); // Write to XL362_FILTER_CTL
delay(10);
#ifdef ADXL362_DEBUG
temp = SPIreadOneRegister(XL362_POWER_CTL);
Serial.print( ", Reg after = ");
Serial.println(temp);
#endif
}
// Basic SPI routines to simplify code
// read and write one register
uint8_t ADXL362::SPIreadOneRegister(uint8_t regAddress){
uint8_t regValue = 0;
digitalWrite(slaveSelectPin, LOW);
SPI.transfer(0x0B); // read instruction
SPI.transfer(regAddress);
regValue = SPI.transfer(0x00);
digitalWrite(slaveSelectPin, HIGH);
return regValue;
}
void ADXL362::SPIwriteOneRegister(uint8_t regAddress, uint8_t regValue){
digitalWrite(slaveSelectPin, LOW);
SPI.transfer(0x0A); // write instruction
SPI.transfer(regAddress);
SPI.transfer(regValue);
digitalWrite(slaveSelectPin, HIGH);
}
int ADXL362::SPIreadTwoRegisters(uint8_t regAddress){
int twoRegValue = 0;
digitalWrite(slaveSelectPin, LOW);
SPI.transfer(0x0B); // read instruction
SPI.transfer(regAddress);
twoRegValue = SPI.transfer(0x00);
twoRegValue = twoRegValue + (SPI.transfer(0x00) << 8);
digitalWrite(slaveSelectPin, HIGH);
return twoRegValue;
}
void ADXL362::SPIwriteTwoRegisters(uint8_t regAddress, int twoRegValue){
uint8_t twoRegValueH = twoRegValue >> 8;
uint8_t twoRegValueL = twoRegValue;
digitalWrite(slaveSelectPin, LOW);
SPI.transfer(0x0A); // write instruction
SPI.transfer(regAddress);
SPI.transfer(twoRegValueL);
SPI.transfer(twoRegValueH);
digitalWrite(slaveSelectPin, HIGH);
}
//----------------- LED Handling ------------------------//
/*-------------------------------------------------------------------------
Spark Core library to control WS2811/WS2812 based RGB
LED devices such as Adafruit NeoPixel strips.
Currently handles 800 KHz and 400kHz bitstream on Spark Core,
WS2812, WS2812B and WS2811.
Also supports Radio Shack Tri-Color Strip with TM1803 controller
400kHz bitstream.
Written by Phil Burgess / Paint Your Dragon for Adafruit Industries.
Modified to work with Spark Core by Technobly.
Modified to work with Spark Button by jenesaisdiq.
Contributions by PJRC and other members of the open source community.
Adafruit invests time and resources providing this open source code,
please support Adafruit and open-source hardware by purchasing products
from Adafruit!
--------------------------------------------------------------------*/
/* ======================= Adafruit_NeoPixel.cpp ======================= */
/*-------------------------------------------------------------------------
This file is part of the Adafruit NeoPixel library.
NeoPixel is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation, either version 3 of
the License, or (at your option) any later version.
NeoPixel is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with NeoPixel. If not, see
<http://www.gnu.org/licenses/>.
-------------------------------------------------------------------------*/
#if PLATFORM_ID == 0 // Core
#define pinLO(_pin) (PIN_MAP[_pin].gpio_peripheral->BRR = PIN_MAP[_pin].gpio_pin)
#define pinHI(_pin) (PIN_MAP[_pin].gpio_peripheral->BSRR = PIN_MAP[_pin].gpio_pin)
#elif PLATFORM_ID == 6 // Photon
//#include "pinmap_impl.h"
STM32_Pin_Info* PIN_MAP2 = HAL_Pin_Map(); // Pointer required for highest access speed
#define pinLO(_pin) (PIN_MAP2[_pin].gpio_peripheral->BSRRH = PIN_MAP2[_pin].gpio_pin)
#define pinHI(_pin) (PIN_MAP2[_pin].gpio_peripheral->BSRRL = PIN_MAP2[_pin].gpio_pin)
#else
#error "*** PLATFORM_ID not supported by this library. PLATFORM should be Core or Photon ***"
#endif
// fast pin access
#define pinSet(_pin, _hilo) (_hilo ? pinHI(_pin) : pinLO(_pin))
Adafruit_NeoPixel::Adafruit_NeoPixel(uint16_t n, uint8_t p, uint8_t t) :
numLEDs(n), numBytes(n*3), brightness(0), pixels(NULL), type(t), endTime(0)
{
if((pixels = (uint8_t *)malloc(numBytes))) {
memset(pixels, 0, numBytes);
}
}
Adafruit_NeoPixel::~Adafruit_NeoPixel() {
if(pixels) free(pixels);
pinMode(pin, INPUT);
}
void Adafruit_NeoPixel::begin(void) {
pinMode(pin, OUTPUT);
digitalWrite(pin, LOW);
}
void Adafruit_NeoPixel::show(void) {
if(!pixels) return;
// Data latch = 24 or 50 microsecond pause in the output stream. Rather than
// put a delay at the end of the function, the ending time is noted and
// the function will simply hold off (if needed) on issuing the
// subsequent round of data until the latch time has elapsed. This
// allows the mainline code to start generating the next frame of data
// rather than stalling for the latch.
uint32_t wait_time; // wait time in microseconds.
switch(type) {
case TM1803: // TM1803 = 24us reset pulse
wait_time = 24L;
break;
case TM1829: // TM1829 = 500us reset pulse
wait_time = 500L;
break;
case WS2812B: // WS2812 & WS2812B = 50us reset pulse
case WS2812B2:
case WS2811: // WS2811 = 50us reset pulse
default: // default = 50us reset pulse
wait_time = 50L;
break;
}
while((micros() - endTime) < wait_time);
// endTime is a private member (rather than global var) so that multiple
// instances on different pins can be quickly issued in succession (each
// instance doesn't delay the next).
__disable_irq(); // Need 100% focus on instruction timing
volatile uint32_t
c, // 24-bit pixel color
mask; // 8-bit mask
volatile uint16_t i = numBytes; // Output loop counter
volatile uint8_t
j, // 8-bit inner loop counter
*ptr = pixels, // Pointer to next byte
g, // Current green byte value
r, // Current red byte value
b; // Current blue byte value
if(type == WS2812B) { // same as WS2812, 800 KHz bitstream
while(i) { // While bytes left... (3 bytes = 1 pixel)
mask = 0x800000; // reset the mask
i = i-3; // decrement bytes remaining
g = *ptr++; // Next green byte value
r = *ptr++; // Next red byte value
b = *ptr++; // Next blue byte value
c = ((uint32_t)g << 16) | ((uint32_t)r << 8) | b; // Pack the next 3 bytes to keep timing tight
j = 0; // reset the 24-bit counter
do {
pinSet(pin, HIGH); // HIGH
if (c & mask) { // if masked bit is high
// WS2812 spec 700ns HIGH
// Adafruit on Arduino (meas. 812ns)
// This lib on Spark Core (meas. 790ns)
// This lib on Photon (meas. 792ns)
asm volatile(
"mov r0, r0" "\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"
"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"
"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"
"nop" "\n\t" "nop" "\n\t" "nop" "\n\t" "nop" "\n\t" "nop" "\n\t"
"nop" "\n\t" "nop" "\n\t"
#if PLATFORM_ID == 6 // Photon
"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"
"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"
"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"
"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"
#endif
::: "r0", "cc", "memory");
// WS2812 spec 600ns LOW
// Adafruit on Arduino (meas. 436ns)
// This lib on Spark Core (meas. 445ns)
// This lib on Photon (meas. 434ns)
pinSet(pin, LOW); // LOW
asm volatile(
"mov r0, r0" "\n\t"
#if PLATFORM_ID == 6 // Photon
"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"
"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"
"nop" "\n\t" "nop" "\n\t" "nop" "\n\t" "nop" "\n\t" "nop" "\n\t"
"nop" "\n\t" "nop" "\n\t"
#endif
::: "r0", "cc", "memory");
}
else { // else masked bit is low
// WS2812 spec 350ns HIGH
// Adafruit on Arduino (meas. 312ns)
// This lib on Spark Core (meas. 318ns)
// This lib on Photon (meas. 308ns)
asm volatile(
"mov r0, r0" "\n\t" "nop" "\n\t" "nop" "\n\t" "nop" "\n\t"
#if PLATFORM_ID == 6 // Photon
"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"
"nop" "\n\t" "nop" "\n\t" "nop" "\n\t" "nop" "\n\t" "nop" "\n\t"
#endif
::: "r0", "cc", "memory");
// WS2812 spec 800ns LOW
// Adafruit on Arduino (meas. 938ns)
// This lib on Spark Core (meas. 946ns)
// This lib on Photon (meas. 934ns)
pinSet(pin, LOW); // LOW
asm volatile(
"mov r0, r0" "\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"
"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"
"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"
"nop" "\n\t" "nop" "\n\t" "nop" "\n\t"
#if PLATFORM_ID == 6 // Photon
"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"
"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"
"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"
"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"
"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"
"nop" "\n\t" "nop" "\n\t"
#endif
::: "r0", "cc", "memory");
}
mask >>= 1;
} while ( ++j < 24 ); // ... pixel done
} // end while(i) ... no more pixels
}
else if(type == WS2812B2) { // WS2812B with DWT timer
#if PLATFORM_ID == 6 // Photon
#define CYCLES_800_T0H 25 // 312ns (meas. 300ns)
#define CYCLES_800_T0L 70 // 938ns (meas. 940ns)
#define CYCLES_800_T1H 80 // 812ns (meas. 792ns)
#define CYCLES_800_T1L 8 // 436ns (meas. 425ns)
volatile uint32_t cyc;
while(i) { // While bytes left... (3 bytes = 1 pixel)
mask = 0x800000; // reset the mask
i = i-3; // decrement bytes remaining
g = *ptr++; // Next green byte value
r = *ptr++; // Next red byte value
b = *ptr++; // Next blue byte value
c = ((uint32_t)g << 16) | ((uint32_t)r << 8) | b; // Pack the next 3 bytes to keep timing tight
j = 0; // reset the 24-bit counter
do {
cyc = DWT->CYCCNT;
pinSet(pin, HIGH); // HIGH
if (c & mask) { // if masked bit is high
while(DWT->CYCCNT - cyc < CYCLES_800_T1H);
pinSet(pin, LOW);
cyc = DWT->CYCCNT;
while(DWT->CYCCNT - cyc < CYCLES_800_T1L);
}
else { // else masked bit is low
while(DWT->CYCCNT - cyc < CYCLES_800_T0H);
pinSet(pin, LOW);
cyc = DWT->CYCCNT;
while(DWT->CYCCNT - cyc < CYCLES_800_T0L);
}
mask >>= 1;
} while ( ++j < 24 ); // ... pixel done
} // end while(i) ... no more pixels
#endif
}
else if(type == WS2811) { // WS2811, 400 KHz bitstream
while(i) { // While bytes left... (3 bytes = 1 pixel)
mask = 0x800000; // reset the mask
i = i-3; // decrement bytes remaining
r = *ptr++; // Next red byte value
g = *ptr++; // Next green byte value
b = *ptr++; // Next blue byte value
c = ((uint32_t)r << 16) | ((uint32_t)g << 8) | b; // Pack the next 3 bytes to keep timing tight
j = 0; // reset the 24-bit counter
do {
pinSet(pin, HIGH); // HIGH
if (c & mask) { // if masked bit is high
// WS2811 spec 1.20us HIGH
// Adafruit on Arduino (meas. 1.25us)
// This lib on Spark Core (meas. 1.25us)
asm volatile(
"mov r0, r0" "\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"
"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"
"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"
"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"
"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"
"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"
"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"
::: "r0", "cc", "memory");
// WS2811 spec 1.30us LOW
// Adafruit on Arduino (meas. 1.25us)
// This lib on Spark Core (meas. 1.24us)
pinSet(pin, LOW); // LOW
asm volatile(
"mov r0, r0" "\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"
"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"
"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"
"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"
"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"
"nop" "\n\t" "nop" "\n\t" "nop" "\n\t" "nop" "\n\t" "nop" "\n\t"
"nop" "\n\t" "nop" "\n\t"
::: "r0", "cc", "memory");
}
else { // else masked bit is low
// WS2811 spec 500ns HIGH
// Adafruit on Arduino (meas. 500ns)
// This lib on Spark Core (meas. 500ns)
asm volatile(
"mov r0, r0" "\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"
"nop" "\n\t" "nop" "\n\t" "nop" "\n\t" "nop" "\n\t" "nop" "\n\t"
"nop" "\n\t" "nop" "\n\t"
::: "r0", "cc", "memory");
// WS2811 spec 2.000us LOW
// Adafruit on Arduino (meas. 2.000us)
// This lib on Spark Core (meas. 2.000us)
pinSet(pin, LOW); // LOW
asm volatile(
"mov r0, r0" "\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"
"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"
"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"
"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"
"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"
"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"
"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"
"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"
"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"
"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"
"nop" "\n\t" "nop" "\n\t" "nop" "\n\t" "nop" "\n\t" "nop" "\n\t"
"nop" "\n\t" "nop" "\n\t" "nop" "\n\t"
::: "r0", "cc", "memory");
}
mask >>= 1;
} while ( ++j < 24 ); // ... pixel done