我最近从RadioShack购买了RGB LED Light Strip并找到了Arduino的example sketch。我可以理解它的一部分，但有很多我也不理解。例如，DATA_1，DATA_0和STRIP_PINOUT定义了什么？那么__asm__()函数在做什么，为什么这么多次被调用？ pgm_read_dword_near()函数正在做什么？
基本上我想做的是创建一个允许我按值设置每组LED的功能（条带上有十组三个LED）。所以我想创建一个这样的函数：
setLedGroup(int groupIndex, float redValue, float greenValue, float blueValue)
示例代码发布在下面：
/***************************************************************************/
// Hardware: RadioShack Tricolor LED Strip
// Arduino IDE: Arduino-1.0
// Date: April 17, 2013
// Copyright© 2013 RadioShack Corporation
//
// This library 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 2.1 of the License, or (at your option) any later version.
//
// This library 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 this library; if not, see <http://www.gnu.org/licenses/>
//
/*****************************************************************************/
#include <avr/pgmspace.h>
// ******** DEBUG ==== should auto config to adapt different mother board *********
//#define DATA_1 (PORTF |= 0X01) // DATA 1 // for ATMEGA
//#define DATA_0 (PORTF &= 0XFE) // DATA 0 // for ATMEGA
//#define STRIP_PINOUT DDRF=0xFF // for ATMEGA
#define DATA_1 (PORTC |= 0X01) // DATA 1 // for UNO
#define DATA_0 (PORTC &= 0XFE) // DATA 0 // for UNO
#define STRIP_PINOUT (DDRC=0xFF) // for UNO
PROGMEM const unsigned long pattern_test_red[10][10]={
{0xff0000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000},
{0x000000,0xff0000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000},
{0x000000,0x000000,0xff0000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000},
{0x000000,0x000000,0x000000,0xff0000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000},
{0x000000,0x000000,0x000000,0x000000,0xff0000,0x000000,0x000000,0x000000,0x000000,0x000000},
{0x000000,0x000000,0x000000,0x000000,0x000000,0xff0000,0x000000,0x000000,0x000000,0x000000},
{0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0xff0000,0x000000,0x000000,0x000000},
{0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0xff0000,0x000000,0x000000},
{0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0xff0000,0x000000},
{0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0xff0000},
};
PROGMEM const unsigned long pattern_test_blue[10][10]={
{0x00ff00,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000},
{0x000000,0x00ff00,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000},
{0x000000,0x000000,0x00ff00,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000},
{0x000000,0x000000,0x000000,0x00ff00,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000},
{0x000000,0x000000,0x000000,0x000000,0x00ff00,0x000000,0x000000,0x000000,0x000000,0x000000},
{0x000000,0x000000,0x000000,0x000000,0x000000,0x00ff00,0x000000,0x000000,0x000000,0x000000},
{0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x00ff00,0x000000,0x000000,0x000000},
{0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x00ff00,0x000000,0x000000},
{0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x00ff00,0x000000},
{0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x00ff00},
};
PROGMEM const unsigned long pattern_test_green[10][10]={
{0x0000ff,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000},
{0x000000,0x0000ff,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000},
{0x000000,0x000000,0x0000ff,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000},
{0x000000,0x000000,0x000000,0x0000ff,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000},
{0x000000,0x000000,0x000000,0x000000,0x0000ff,0x000000,0x000000,0x000000,0x000000,0x000000},
{0x000000,0x000000,0x000000,0x000000,0x000000,0x0000ff,0x000000,0x000000,0x000000,0x000000},
{0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x0000ff,0x000000,0x000000,0x000000},
{0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x0000ff,0x000000,0x000000},
{0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x0000ff,0x000000},
{0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x0000ff},
};
PROGMEM const unsigned long pattern_test_white[10][10]={
{0xffffff,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000},
{0x000000,0xffffff,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000},
{0x000000,0x000000,0xffffff,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000},
{0x000000,0x000000,0x000000,0xffffff,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000},
{0x000000,0x000000,0x000000,0x000000,0xffffff,0x000000,0x000000,0x000000,0x000000,0x000000},
{0x000000,0x000000,0x000000,0x000000,0x000000,0xffffff,0x000000,0x000000,0x000000,0x000000},
{0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0xffffff,0x000000,0x000000,0x000000},
{0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0xffffff,0x000000,0x000000},
{0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0xffffff,0x000000},
{0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0xffffff},
};
PROGMEM const unsigned long pattern_test_comet1[][10]={
{0xffffff,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000},
{0x444444,0xffffff,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000},
{0x111111,0x444444,0xffffff,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000},
{0x000000,0x111111,0x444444,0xffffff,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000},
{0x000000,0x000000,0x111111,0x444444,0xffffff,0x000000,0x000000,0x000000,0x000000,0x000000},
{0x000000,0x000000,0x000000,0x111111,0x444444,0xffffff,0x000000,0x000000,0x000000,0x000000},
{0x000000,0x000000,0x000000,0x000000,0x111111,0x444444,0xffffff,0x000000,0x000000,0x000000},
{0x000000,0x000000,0x000000,0x000000,0x000000,0x111111,0x444444,0xffffff,0x000000,0x000000},
{0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x111111,0x444444,0xffffff,0x000000},
{0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x111111,0x444444,0xffffff},
};
PROGMEM const unsigned long pattern_test_comet2[][10]={
{0xffffff,0x000000,0x000000,0x111111,0x444444,0xffffff,0x000000,0x000000,0x000000,0x000000},
{0x444444,0xffffff,0x000000,0x000000,0x111111,0x444444,0xffffff,0x000000,0x000000,0x000000},
{0x111111,0x444444,0xffffff,0x000000,0x000000,0x111111,0x444444,0xffffff,0x000000,0x000000},
{0x000000,0x111111,0x444444,0xffffff,0x000000,0x000000,0x111111,0x444444,0xffffff,0x000000},
{0x000000,0x000000,0x111111,0x444444,0xffffff,0x000000,0x000000,0x111111,0x444444,0xffffff},
{0xffffff,0x000000,0x000000,0x111111,0x444444,0xffffff,0x000000,0x000000,0x000000,0x000000},
{0x444444,0xffffff,0x000000,0x000000,0x111111,0x444444,0xffffff,0x000000,0x000000,0x000000},
{0x111111,0x444444,0xffffff,0x000000,0x000000,0x111111,0x444444,0xffffff,0x000000,0x000000},
{0x000000,0x111111,0x444444,0xffffff,0x000000,0x000000,0x111111,0x444444,0xffffff,0x000000},
{0x000000,0x000000,0x111111,0x444444,0xffffff,0x000000,0x000000,0x111111,0x444444,0xffffff},
};
PROGMEM const unsigned long pattern_test_comet3[][10]={
{0xffffff,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0xffffff},
{0x444444,0xffffff,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0xffffff,0x444444},
{0x111111,0x444444,0xffffff,0x000000,0x000000,0x000000,0x000000,0xffffff,0x444444,0x111111},
{0x000000,0x111111,0x444444,0xffffff,0x000000,0x000000,0xffffff,0x444444,0x111111,0x000000},
{0x000000,0x000000,0x111111,0x444444,0xffffff,0xffffff,0x444444,0x111111,0x000000,0x000000},
{0x000000,0x000000,0x111111,0x444444,0xffffff,0xffffff,0x444444,0x111111,0x000000,0x000000},
{0x000000,0x000000,0x000000,0xffffff,0x444444,0x444444,0xffffff,0x000000,0x000000,0x000000},
{0x000000,0x000000,0xffffff,0x444444,0x111111,0x111111,0x444444,0xffffff,0x000000,0x000000},
{0x000000,0xffffff,0x444444,0x111111,0x000000,0x000000,0x111111,0x444444,0xffffff,0x000000},
{0xffffff,0x444444,0x111111,0x000000,0x000000,0x000000,0x000000,0x111111,0x444444,0xffffff},
};
PROGMEM const unsigned long pattern_test_rainbow[10][10]={
{0xff0000,0xff7f00,0xffff00,0x00ff00,0x0000ff,0x6f00ff,0x8f00ff,0x000000,0x000000,0x000000},
{0x000000,0xff0000,0xff7f00,0xffff00,0x00ff00,0x0000ff,0x6f00ff,0x8f00ff,0x000000,0x000000},
{0x000000,0x000000,0xff0000,0xff7f00,0xffff00,0x00ff00,0x0000ff,0x6f00ff,0x8f00ff,0x000000},
{0x000000,0x000000,0x000000,0xff0000,0xff7f00,0xffff00,0x00ff00,0x0000ff,0x6f00ff,0x8f00ff},
{0x8f00ff,0x000000,0x000000,0x000000,0xff0000,0xff7f00,0xffff00,0x00ff00,0x0000ff,0x6f00ff},
{0x6f00ff,0x8f00ff,0x000000,0x000000,0x000000,0xff0000,0xff7f00,0xffff00,0x00ff00,0x0000ff},
{0x0000ff,0x6f00ff,0x8f00ff,0x000000,0x000000,0x000000,0xff0000,0xff7f00,0xffff00,0x00ff00},
{0x00ff00,0x0000ff,0x6f00ff,0x8f00ff,0x000000,0x000000,0x000000,0xff0000,0xff7f00,0xffff00},
{0xffff00,0x00ff00,0x0000ff,0x6f00ff,0x8f00ff,0x000000,0x000000,0x000000,0xff0000,0xff7f00},
{0xff7f00,0xffff00,0x00ff00,0x0000ff,0x6f00ff,0x8f00ff,0x000000,0x000000,0x000000,0xff0000},
};
// ***********************************************************************************************************
// *
// * Power Up Init.
// *
// *
// ***********************************************************************************************************
void setup() {
STRIP_PINOUT; // set output pin - DEBUG: should auto detect which mother board for use
reset_strip();
//noInterrupts();
}
// ***********************************************************************************************************
// *
// * Main Loop
// *
// *
// ***********************************************************************************************************
void loop()
{
send_1M_pattern(pattern_test_red, 10, 500);
delay(500);
send_1M_pattern(pattern_test_blue, 10, 500);
delay(500);
send_1M_pattern(pattern_test_green, 10, 500);
delay(500);
send_1M_pattern(pattern_test_white, 10, 500);
delay(500);
send_1M_pattern(pattern_test_comet1, 10, 70);
delay(500);
send_1M_pattern(pattern_test_comet2, 10, 70);
delay(500);
send_1M_pattern(pattern_test_comet3, 10, 70);
delay(500);
while (1)
{
send_1M_pattern(pattern_test_rainbow, 10, 70);
}
/*
frame++;
if(frame<=10) LEDSTRIP_PATTERN_0();
if(10<frame<=20) LEDSTRIP_PATTERN_0();
if(20<frame<=30) LEDSTRIP_PATTERN_0();
if(frame>30) frame=1;
*/
//delay(1);
}
/*******************************************************************************
* Function Name : send_1M_pattern
* Description : Transmit pattern to whole 1 meter strip
*
* Input : pointer to ROM pattern; pattern length; frame rate
*
* Output : None
* Return : None
*******************************************************************************/
void send_1M_pattern(const unsigned long data[][10], int pattern_no, int frame_rate)
{
int i=0;
int j=0;
uint32_t temp_data;
for (i=0;i<pattern_no;i++)
{
noInterrupts();
for (j=0;j<10;j++)
{
temp_data=pgm_read_dword_near(&data[i][j]);
send_strip(temp_data);
}
interrupts();
delay(frame_rate);
}
}
/*******************************************************************************
* Function Name : send_strip
* Description : Transmit 24 pulse to LED strip
*
* Input : 24-bit data for the strip
*
* Output : None
* Return : None
*******************************************************************************/
void send_strip(uint32_t data)
{
int i;
unsigned long j=0x800000;
for (i=0;i<24;i++)
{
if (data & j)
{
DATA_1;
__asm__("nop\n\t");
__asm__("nop\n\t");
__asm__("nop\n\t");
__asm__("nop\n\t");
__asm__("nop\n\t");
__asm__("nop\n\t");
__asm__("nop\n\t");
__asm__("nop\n\t");
__asm__("nop\n\t");
__asm__("nop\n\t");
__asm__("nop\n\t");
__asm__("nop\n\t");
__asm__("nop\n\t");
__asm__("nop\n\t");
__asm__("nop\n\t");
__asm__("nop\n\t");
__asm__("nop\n\t");
__asm__("nop\n\t");
/*----------------------------*/
__asm__("nop\n\t");
__asm__("nop\n\t");
__asm__("nop\n\t");
__asm__("nop\n\t");
__asm__("nop\n\t");
__asm__("nop\n\t");
__asm__("nop\n\t");
__asm__("nop\n\t");
__asm__("nop\n\t");
__asm__("nop\n\t");
/*----------------------------*/
DATA_0;
}
else
{
DATA_1;
__asm__("nop\n\t");
__asm__("nop\n\t");
__asm__("nop\n\t");
__asm__("nop\n\t");
__asm__("nop\n\t");
__asm__("nop\n\t");
__asm__("nop\n\t");
__asm__("nop\n\t");
__asm__("nop\n\t");
DATA_0;
/*----------------------------*/
__asm__("nop\n\t");
__asm__("nop\n\t");
__asm__("nop\n\t");
/*----------------------------*/
}
j>>=1;
}
}
/*******************************************************************************
* Function Name : reset_strip
* Description : Send reset pulse to reset all color of the strip
*
* Input : None
*
* Output : None
* Return : None
*******************************************************************************/
void reset_strip()
{
DATA_0;
delayMicroseconds(20);
}
答案 0 :(得分：1)
来自Radio Shack的非常可怕的“示例”代码（他们显然仍然没有得到它：示例用于学习。令人惊讶的是他们仍然在做生意。）
我没有尝试过此代码，但请参阅此pololu示例集。它使用TM1804 LED驱动器 - Radio Shack使用TM1803。此外，在尝试计算出东西时，搜索芯片，传感器等名称+ Arduino总是很有用;通常有人已经去过那里，例如对"TM1803" arduino的搜索产生了许多有希望的命中。
答案 1 :(得分：0)
使用TOMATO建议的条款进行搜索，我找到了FastLED图书馆。这个库让你可以非常轻松地使用灯光。