问题描述
我有以下数组:
PROGMEM prog_uint16_t show_hide_info[] = { 4216, 8900, 4380, 580, 500, 600, 500, 580, 1620, 580, 500, 600, 500, 580, 500, 600, 480, 600, 500, 580, 1620, 580, 1620, 600, 500, 580, 1620, 580, 1620, 600, 1600, 600, 1620, 580, 1620, 600, 500, 580, 1620, 580, 500, 600, 1600, 600, 500, 580, 1620, 580, 500, 600, 1620, 580, 1620, 600, 480, 600, 1620, 580, 500, 600, 1600, 600, 500, 580, 1620, 580, 500, 600, 39300, 8860, 2160, 580, 0 };
我希望能够遍历这个数组并相应地执行以下方法:
I'd like to be able to loop through this array and execute the following methods accordingly:
pulseIR(4216);
delayMicroseconds(8900);
pulseIR(4380);
delayMicroseconds(580);
...
这是我到目前为止,这显然是方式偏离了轨道:
This is what I have so far, which is obviously way off track:
unsigned int* get(prog_uint16_t code[]) {
unsigned int c;
while ((c = pgm_read_word(code++))) {
//pulseIR(c); ??
//delayMicroseconds(c+1); ??
}
}
不太清楚,我意思是用操作ç
是诚实的。
由于睡眠不足,我不能为我的生活做出以下文档感对 PROGMEM
:
Due to lack of sleep, I can't for the life of me make sense of the following documentation on PROGMEM
:
推荐答案
首先,您需要一些短期的手找到了数组的末尾。如果其值的固定数量,那么编译器可以计算这种方式找到INT16值的计数:
First you'll need some short hand to find the end of the array. If its a fixed number of values, then the compiler can calculate it this way to find the count of int16 values:
PROGMEM prog_uint16_t show_hide_info[] = { 4216, 8900, 4380, 580, ....etc
int arraySize = sizeof(show_hide_info) / sizeof(prog_uint16_t);
然后,如果你想有一个去通过你的阵列只是一次函数,该函数可以这样声明:
Then if you want to have a function that goes thru your array just once, the function can be declared this way:
void cycleThruArrayOnce(prog_uint16_t *pInArray, int nLimit) {
for (int i=0;i<nLimit;i=i+2) {
pulseIR(pgm_read_word(pInArray++));
delayMicroseconds(pgm_read_word(pInArray+));
}
}
和它可以从你的主程序调用这种方式:
And it can be called from your main program this way:
cycleThruArrayOnce(show_hide_info, arraySize);
这篇关于Arduino的 - 到C数组迭代效率的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!