hehexi
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请大家帮忙看看有什么问题? #include <reg52.h> #define uchar unsigned char #define uint unsigned int sbit test = P1^0; uchar x;//256时100Hz;1时24.25KHz; uint H,L; uchar flag; void Initurat() { TMOD=0X20; TH0 = 0Xfd; TL0 = 0Xfd; TR1 = 1; SM0=0; SM1=1; REN=1; PCON|=0x00;//SMOD=0; EA = 1; ES = 1; } void receive() interrupt 4 { if(RI) { RI = 0; x = SBUF; ES = 0; flag = 1; } } void init() { EA = 1; ET1 = 1; TMOD=0x10; x = 65536 - x*18; H = x / 256; L = x % 256; TH1 = H; TL1 = L; TR1 = 1; } main() { init(); while(1); } void interrupt_() interrupt 3 { TH1 = H; TL1 = L; P1 = ~P1; IE1 = 0; }
在LED软灯带中只知道我要的每一米有多大的功率,供电电压,灯珠的电压、电流,那么在这灯带上该贴个多大的电阻?灯带有很多类型(例如3灯1电阻、3灯2电阻,3灯3电阻,6灯2电阻,6灯4电阻),这些灯带中的电阻该怎么算?怎么选用呢?
HTTP/1.1 200 OK Date: Sun 24 Nov 2019 08:05:03 GMT Content-Type: application/json Content-Length: 21 {"status": "success"} 这是发送http后收到的数据,应该怎样去除head,只保留json格式的body呢