【发布时间】：2014-06-03 02:01:05
【问题描述】：
这是回答我最初问题here的人的交叉帖子。
我不确定如何执行我所追求的 3 个功能（以及将来引入甚至更多的功能）。
我只是尝试淡化/闪烁 RGB LED 的选定颜色（将来可能会引入更多功能），其 RGB 数据从 iOS 返回并发送到RFDuino BLE module。
向 Arduino 端 RFduinoBLE_onReceive (char *data, int len) 拾取的模块发送一个“fade”字符串。
- (IBAction)fadeButtonPressed:(id)sender {
[rfduino send:[@"fade" dataUsingEncoding:NSUTF8StringEncoding]];
}
- (IBAction)blinkButtonPressed:(id)sender {
[rfduino send:[@"blink" dataUsingEncoding:NSUTF8StringEncoding]];
}
所选颜色：
- (void)setColor
{
NSLog(@"colors: RGB %f %f %f", red, green, blue);
UIColor *color = [UIColor colorWithRed:red green:green blue:blue alpha:1.0];
[colorSwatch setHighlighted:YES];
[colorSwatch setTintColor:color];
uint8_t tx[3] = { red * 255, green * 255, blue * 255 };
NSData *data = [NSData dataWithBytes:(void*)&tx length:3];
[rfduino send:data];
}
这是我最初设置 RGB 颜色的方式：
void RFduinoBLE_onReceive (char *data, int len) {
if (len >= 3) {
// Get the RGB values.
uint8_t red = data[0];
uint8_t green = data[1];
uint8_t blue = data[2];
// Set PWM for each LED.
analogWrite(rgb2_pin, red);
analogWrite(rgb3_pin, green);
analogWrite(rgb4_pin, blue);
}
}
这是现在在 Arduino 上编译的提供的答案，但我不知道如何实际执行我的函数以及在哪里执行？
#include <RFduinoBLE.h>
int state;
char command;
String hexstring;
// RGB pins.
int redPin = 2;
int grnPin = 3;
int bluPin = 4;
void setup () {
state = 1;
pinMode(redPin, OUTPUT);
pinMode(grnPin, OUTPUT);
pinMode(bluPin, OUTPUT);
// This is the data we want to appear in the advertisement
// (the deviceName length plus the advertisement length must be <= 18 bytes.
RFduinoBLE.deviceName = "iOS";
RFduinoBLE.advertisementInterval = MILLISECONDS(300);
RFduinoBLE.txPowerLevel = -20;
RFduinoBLE.advertisementData = "rgb";
// Start the BLE stack.
RFduinoBLE.begin();
}
void loop () {
//RFduino_ULPDelay(INFINITE);
}
void processCommand (int command, String hex) {
// hex ?
// command ?
}
void RFduinoBLE_onReceive (char *data, int len) {
for (int i = 0; i < len; i++) {
stateMachine(data[i]);
}
}
void stateMachine (char data) {
switch (state) {
case 1:
if (data == 1) {
state = 2;
}
break;
case 2:
if (data == 'b' || data == 'f' || data == 'c') {
command = data;
hexstring = "";
state = 3;
} else if (data != 1) { // Stay in state 2 if we received another 0x01.
state = 1;
}
break;
case 3:
if ((data >= 'a' && data <= 'z') || (data >= '0' && data <= '9')) {
hexstring = hexstring + data;
if (hexstring.length() == 6) {
state = 4;
}
} else if (data == 1) {
state = 2;
} else {
state = 1;
}
break;
case 4:
if (data == 3) {
processCommand(command, hexstring);
state = 1;
} else if (data == 1) {
state = 2;
} else {
state = 1;
}
break;
}
}
编辑：最终代码
#include <RFduinoBLE.h>
// State properties.
int state = 1;
char command;
String hexstring;
// RGB pins.
int redPin = 2;
int grnPin = 3;
int bluPin = 4;
// Setup function to set RGB pins to OUTPUT pins.
void setup () {
pinMode(redPin, OUTPUT);
pinMode(grnPin, OUTPUT);
pinMode(bluPin, OUTPUT);
// This is the data we want to appear in the advertisement
// (the deviceName length plus the advertisement length must be <= 18 bytes.
RFduinoBLE.deviceName = "iOS";
RFduinoBLE.advertisementInterval = MILLISECONDS(300);
RFduinoBLE.txPowerLevel = -20;
RFduinoBLE.advertisementData = "rgb";
// Start the BLE stack.
RFduinoBLE.begin();
}
void loop () {
switch (command) {
case 1:
// Blink.
break;
case 2:
// Fade.
break;
}
//RFduino_ULPDelay(INFINITE);
}
// Converts HEX as a String to actual HEX values.
// This is needed to properly convert the ASCII value to the hex
// value of each character.
byte getVal (char c) {
if (c >= '0' && c <= '9') return (byte)(c - '0');
else return (byte)(c - 'a' + 10);
}
// Process each function/command.
void processCommand (int command, String hex) {
switch (command) {
case 'b':
command = 1; // Set blink mode.
break;
case 'f':
command = 2; // Set fade mode.
break;
case 'c':
// We put together 2 characters as is
// done with HEX notation and set the color.
byte red = getVal(hex.charAt(1)) + (getVal(hex.charAt(0)) << 4);
byte green = getVal(hex.charAt(3)) + (getVal(hex.charAt(2)) << 4);
byte blue = getVal(hex.charAt(5)) + (getVal(hex.charAt(4)) << 4);
// Set the color.
setColor (red, green, blue);
break;
}
}
// Sets the color of each RGB pin.
void setColor (byte red, byte green, byte blue) {
analogWrite(redPin, red);
analogWrite(grnPin, green);
analogWrite(bluPin, blue);
}
// This function returns data from the radio.
void RFduinoBLE_onReceive (char *data, int len) {
for (int i = 0; i < len; i++) {
stateMachine(data[i]);
}
}
// Main state machine function, which processes
// data depending on the bytes received.
void stateMachine (char data) {
switch (state) {
case 1:
if (data == 1) {
state = 2;
}
break;
case 2:
if (data == 'b' || data == 'f' || data == 'c') {
command = data;
hexstring = "";
state = 3;
} else if (data != 1) { // Stay in state 2 if we received another 0x01.
state = 1;
}
break;
case 3:
if ((data >= 'a' && data <= 'z') || (data >= '0' && data <= '9')) {
hexstring = hexstring + data;
if (hexstring.length() == 6) {
state = 4;
}
} else if (data == 1) {
state = 2;
} else {
state = 1;
}
break;
case 4:
if (data == 3) {
processCommand(command, hexstring);
state = 1;
} else if (data == 1) {
state = 2;
} else {
state = 1;
}
break;
}
}
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标签： objective-c arduino rgb led