c - 我如何将这个为单个 LED 制作的代码转换为我在 arduino 上的 LED 灯条？
问题描述
所以我的项目是用 rgb 条制作一个 LED 风扇，我发现了一些非常相似的东西，但我在一周内尝试使用 fastLED 库更改代码以喜欢转换它，但我请求帮助。[类似的代码，但与POV 领导的 arduino 项目中的 digitalWrite 类似：
// bit shift through the byte and output it to the pin
for (int j=0; j<charHeight; j++) {
digitalWrite(LEDpins[j], !!(b & (1 << j)));
（我不能用 LED 灯条做“digitalWrite”）] 2
所以我想知道是否有人在代码方面可以给我一些更正。
我有一个 arduino nano，它可以让 7 个 LED（我想在原型的侧面写一条消息）闪烁以通过视网膜持久性来写一条消息。 我想要做的是当我在序列中收到一条消息时（我制作了一个蓝牙应用程序给我发送一个单词），我希望它在他旋转时显示在我的原型上。因此，如果我想在原型的侧面显示一个字母，我必须像我手动制作的那样写它，但它太长了：
// la lettre A :
leds[24] = CRGB::Red;
leds[23] = CRGB::Red;
leds[22] = CRGB::Red;
leds[21] = CRGB::Red;
leds[20] = CRGB::Red;
leds[19] = CRGB::Red;
leds[18] = CRGB::Black;
FastLED.show();
delay(Pause);
leds[24] = CRGB::Black;
leds[23] = CRGB::Black;
leds[22] = CRGB::Black;
leds[21] = CRGB::Red;
leds[20] = CRGB::Black;
leds[19] = CRGB::Black;
leds[18] = CRGB::Red;
FastLED.show();
delay(Pause);
leds[24] = CRGB::Black;
leds[23] = CRGB::Black;
leds[22] = CRGB::Black;
leds[21] = CRGB::Red;
leds[20] = CRGB::Black;
leds[19] = CRGB::Black;
leds[18] = CRGB::Red;
FastLED.show();
delay(Pause);
leds[24] = CRGB::Black;
leds[23] = CRGB::Black;
leds[22] = CRGB::Black;
leds[21] = CRGB::Red;
leds[20] = CRGB::Black;
leds[19] = CRGB::Black;
leds[18] = CRGB::Red;
FastLED.show();
delay(Pause);
leds[24] = CRGB::Red;
leds[23] = CRGB::Red;
leds[22] = CRGB::Red;
leds[21] = CRGB::Red;
leds[20] = CRGB::Red;
leds[19] = CRGB::Black;
FastLED.show();
delay(Pause);
leds[24] = CRGB::Black;
leds[23] = CRGB::Black;
leds[22] = CRGB::Black;
leds[21] = CRGB::Black;
leds[20] = CRGB::Black;
leds[19] = CRGB::Black;
FastLED.show();
delay(Pause);
所以从技术上讲它很好用，但是当我发送例如“困难”时，我想用一个函数或类似的东西来做。（我可以看到它是如何工作的，但现在我无法做到）。
请帮我，
如果您想了解更多信息，可以告诉我。
伊万·巴罗佐
解决方案
因此，如果我想在原型的侧面显示一个字母，我必须像我手动制作的那样写它，但它太长了
可以理解的是，您不想手动写下每个单独的字母列序列。这是一个使用字符图像表的示例程序（类似于字符 ROM）；它演示了 ANSI 终端上的输出，但您可以轻松地将其调整到您的 LED 灯条上。
/* cc -std=c99 */
// glyphs taken from https://github.com/uffejakobsen/sysvbanner/blob/master/banner.c
char glyphs[7*(0x7F-' '+1)/8][7*8] =
{ // 7 x 7 pixels for each of our displayable characters (8 side by side)
" ### ### ### # # ##### ### # ## ### ",
" ### ### ### # # # # ## # # # # ### ",
" ### # # ######## # ### # ## # ",
" # # # ##### # ### # ",
" ####### # # # #### # # ",
" ### # # # # # # # ## # ",
" ### # # ##### # ### #### # ",
" ## ## #",
" # # # # # # ",
" # # # # # # ",
" # # ### ### ##### ### ##### # ",
" # # # # # ### ### # ",
" # # # # # # ### # ",
" ## ## # ### # ",
" ### # ##### ##### # ####### ##### #######",
" # # ## # ## ## # # # ## # ",
"# # # # # # ## # # # # ",
"# # # # ##### ##### ####### ##### ###### # ",
"# # # # # # # ## # # ",
" # # # # # # # # ## # # ",
" ### ##### ####### ##### # ##### ##### # ",
" ##### ##### # ### # # ##### ",
"# ## # # # ### # # # #",
"# ## # # # ##### # #",
" ##### ###### ### # # ## ",
"# # # # ### # ##### # # ",
"# ## # # # # # # ",
" ##### ##### # # # # # ",
" ##### # ###### ##### ###### ############## ##### ",
"# # # # # ## ## ## # # #",
"# ### # # # # ## # ## # # ",
"# # # ## ####### # # ###### ##### # ####",
"# #### ######## ## # ## # # #",
"# ## ## ## ## ## # # #",
" ##### # ####### ##### ###### ######## ##### ",
"# # ### ## # # # ## ########",
"# # # ## # # ## #### ## #",
"# # # ## # # # # # ## # ## #",
"####### # #### # # # ## # ## #",
"# # # # ## # # # ## # ## #",
"# # # # ## # # # ## ### #",
"# # ### ##### # # ######## ## ########",
"###### ##### ###### ##### ######## ## ## #",
"# ## ## ## # # # ## ## # #",
"# ## ## ## # # ## ## # #",
"###### # ####### ##### # # ## ## # #",
"# # # ## # # # # # # # # # #",
"# # # # # # # # # # # # # # #",
"# #### ## # ##### # ##### # ## ## ",
"# ## ######## ##### # ##### # ",
" # # # # # # # # # # ",
" # # # # # # # # # # ",
" # # # # # # ",
" # # # # # # # ",
" # # # # # # # ",
"# # # ####### ##### # ##### #######",
" ### ",
" ### ## ##### #### ##### ###### ###### #### ",
" # # # # # # # # # # # # #",
" # # # ##### # # # ##### ##### # ",
" ###### # # # # # # # # ###",
" # # # # # # # # # # # #",
" # # ##### #### ##### ###### # #### ",
" ",
" # # # # # # # # # # # #### ",
" # # # # # # # ## ## ## # # #",
" ###### # # #### # # ## # # # # # #",
" # # # # # # # # # # # # # #",
" # # # # # # # # # # # ## # #",
" # # # #### # # ###### # # # # #### ",
" ",
" ##### #### ##### #### ##### # # # # # #",
" # # # # # # # # # # # # # #",
" # # # # # # #### # # # # # # #",
" ##### # # # ##### # # # # # # # ## #",
" # # # # # # # # # # # # ## ##",
" # ### # # # #### # #### ## # #",
" ### # ### ## # # # #",
" # # # # ###### # # # # # # # # # ",
" # # # # # # # # ## # # # #",
" ## # # ## ## # # # ",
" ## # # # # # # # # #",
" # # # # # # # # # # ",
" # # # ###### ### # ### # # # #"};
#define delay(p) sleep(1)
#include <stdio.h>
#include <unistd.h>
char led[25];
void show()
{
printf("\e[A\e[A\e[A\e[A\e[A\e[A\e[A");
for (int i = 18; i <= 24; ++i)
printf("%c\e[B\e[D", led[i] ? '#' : ' ');
printf("\e[C");
fflush(stdout);
}
int main(int argc, char *argv[])
{
if (argc < 2) return 1;
char c = *argv[1];
enum { Black, Red };
if (c < ' ' || 0x7F < c) return 1;
int i = c-' ';
puts("\n\n\n\n\n\n");
for (int col = 0; col < 7; ++col)
{
for (int row = 0; row < 7; ++row)
led[18+row] = glyphs[i/8*7+row][i%8*7+col] == ' ' ? Black : Red;
show();
delay(Pause);
}
puts("");
}
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