用Arduino在LED矩阵上显示HEX值数组

Question

所以我在Processing中编写了一个脚本，它可以将任何给定图像的每个像素的HEX值输出到数组中。我试图让这个FastLED库读取数组和我得到这么多不同的错误。我试着将HEX的字符串改为FF和0x头的字符串。似乎没有任何工作。现在它一直说十六进制值没有在范围内声明。如果我将字符串更改为字符串，我会收到一个函数错误，告诉我他们不是叮咬。我在智慧结束。这是代码。

#include <FastLED.h> 

#include <LEDMatrix.h> 
#include <string.h> 
// Change the next 6 defines to match your matrix type and size 

#define LED_PIN  7 
#define COLOR_ORDER GRB 
#define CHIPSET  WS2811 

#define MATRIX_WIDTH 32 // Set this negative if physical led 0 is opposite to where you want logical 0 
#define MATRIX_HEIGHT 8 // Set this negative if physical led 0 is opposite to where you want logical 0 
#define MATRIX_TYPE VERTICAL_ZIGZAG_MATRIX // See top of LEDMatrix.h for matrix wiring types 


cLEDMatrix<MATRIX_WIDTH, MATRIX_HEIGHT, MATRIX_TYPE> leds; 

char pixs [] = {{FFCE2131}, 
{FFCE1929}, 
{FFCE1929}, 
{FFCE1929}, 
{FFCE1929}, 
{FFCE1929}, 
{FFCE1929}, 
{FFCE2131}, 
{FFC50821}, 
{FFC50821}, 
{FFC50821}, 
{FFC50821}, 
{FFC50821}, 
{FFC50821}, 
{FFC50821}, 
{FFC50821}, 
{FFCE1929}, 
{FFC50821}, 
{FFC50821}, 
{FFC50821}, 
{FFC50821}, 
{FFC50821}, 
{FFC50821}, 
{FFCE1929}, 
{FFCE1929}, 
{FFC50821}, 
{FFC50821}, 
{FFC50821}, 
{FFC50821}, 
{FFC50821}, 
{FFC50821}, 
{FFCE1929}, 
{FFCE1929}, 
{FFC50821}, 
{FFC50821}, 
{FFC50821}, 
{FFC50821}, 
{FFC50821}, 
{FFC50821}, 
{FFCE1929}, 
{FFCE1929}, 
{FFC50821}, 
{FFC50821}, 
{FFC50821}, 
{FFC50821}, 
{FFC50821}, 
{FFC50821}, 
{FFCE1929}, 
{FFCE1929}}; 



void setup() 
{ 
    FastLED.addLeds<CHIPSET, LED_PIN, COLOR_ORDER>(leds[0], leds.Size()); 
    FastLED.setBrightness(15); 
    FastLED.clear(true); 
    delay(500); 
    FastLED.clear(true); 
    Serial.begin(9600); 

} 

void loop() { 



leds(0,0) = 0xCE2131; 
leds(31,0) = CRGB::White; 
leds(0,7) = CRGB::Green; 
leds(31,7) = CRGB::Yellow; 
FastLED.show(); 
delay(2000); 
FastLED.clear(true); 
delay(1000); 

int i; 
for (i = 0; i < length.pixs ; i ++){ 
    leds(0,0) = pixs[i]; 
    FastLED.show(); 
} 

} 

Answer 1

进化花了约40亿年，这是一个很好的迹象表明，随机突变编程不是一个好主意。我没有arduino，而且我没有硬件设置来测试代码，并且您的描述不足以准确猜测您将要执行的操作。这就是说：

你有什么期望

length.pixs 

可能意味着或做？ C++习惯用法建议使用std :: array我想，这将使您能够优雅地获取条目数。因为你坚持C数组，长度将通过

sizeof(pixs)/sizeof(*pixs) 

来计算阵列结构是有缺陷的，在您的代码访问阵列是一维和你的类型也表示1维的。所以它应该是

unsigned long pixs [] = {0xCE2131, 0xCE1929, 0xCE1929} 

而不是你的双支撑列表。 Hex文字通过使用0x给出，没有别的。 0xCE1929而不是FFCE1929它没有任何意义（尽管它是您的代码中没有意义的标识符）

以下版本的代码至少在语法上是正确的，应为您的进一步探索提供基础。

#include <LEDMatrix.h> 
#include <string.h> 

#define MATRIX_WIDTH 32 // Set this negative if physical led 0 is opposite to where you want logical 0 
#define MATRIX_HEIGHT 8 // Set this negative if physical led 0 is opposite to where you want logical 0 
#define MATRIX_TYPE VERTICAL_ZIGZAG_MATRIX // See top of LEDMatrix.h for matrix wiring types 


cLEDMatrix<MATRIX_WIDTH, MATRIX_HEIGHT, MATRIX_TYPE> leds; 

unsigned long pixs [] = {0xCE2131, 
    0xCE1929,0xCE1929,0xCE1929,0xCE1929, 
    0xCE1929,0xCE1929,0xCE2131,0xC50821, 
    0xC50821,0xC50821,0xC50821,0xC50821, 
    0xC50821,0xC50821,0xC50821,0xCE1929, 
    0xC50821,0xC50821,0xC50821,0xC50821, 
    0xC50821,0xC50821,0xCE1929,0xCE1929, 
    0xC50821,0xC50821,0xC50821,0xC50821, 
    0xC50821,0xC50821,0xCE1929,0xCE1929, 
    0xC50821,0xC50821,0xC50821,0xC50821, 
    0xC50821,0xC50821,0xCE1929,0xCE1929, 
    0xC50821,0xC50821,0xC50821,0xC50821, 
    0xC50821,0xC50821,0xCE1929,0xCE1929}; 



void setup() 
{ 
    FastLED.addLeds<CHIPSET, LED_PIN, COLOR_ORDER>(leds[0], leds.Size()); 
    FastLED.setBrightness(15); 
    FastLED.clear(true); 
    delay(500); 
    FastLED.clear(true); 
    Serial.begin(9600); 
} 

void loop() { 
    leds(0,0) = 0xCE2131; 
    leds(31,0) = CRGB::White; 
    leds(0,7) = CRGB::Green; 
    leds(31,7) = CRGB::Yellow; 
    FastLED.show(); 
    delay(2000); 
    FastLED.clear(true); 
    delay(1000); 

    for (int i = 0; i < sizeof(pixs)/sizeof(*pixs) ; i ++){ 
     leds(0,0) = pixs[i]; 
     FastLED.show(); 
    } 

}