8位数码管 电路图及代码..
在网上找到的一个例子要8个74H595 !
还可以往后最叠加更多...
// # Editor : Lauren from DFRobot
// # Date : 30.12.2011
// # Update the library and sketch to compatible with IDE V1.0 and earlier
// #
// # Editor : Lauren from DFRobot
// # Date : 17.01.2012
// # Product name: SPI lED Module(Arduino Compatible)
// # Product SKU : DFR0090
// # Version : 1.0
//Pin connected to latch pin (ST_CP) of 74HC595
const int latchPin = 8;
//Pin connected to clock pin (SH_CP) of 74HC595
const int clockPin = 3;
////Pin connected to Data in (DS) of 74HC595
const int dataPin = 9;
byte Tab[]={
0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xff};
void setup() {
//set pins to output because they are addressed in the main loop
pinMode(latchPin, OUTPUT);
pinMode(dataPin, OUTPUT);
pinMode(clockPin, OUTPUT);
Serial.begin(9600);
Serial.println("reset");
for(int i = 0;i < 10; i++){
digitalWrite(latchPin, LOW);
shiftOut(dataPin, clockPin, MSBFIRST, Tab);
digitalWrite(latchPin, HIGH);
delay(500);
}
}
void loop() {
if (Serial.available() > 0) {
// ASCII '0' through '9' characters are
// represented by the values 48 through 57.
// so if the user types a number from 0 through 9 in ASCII,
// you can subtract 48 to get the actual value:
int bitToSet = Serial.read() - 48;
// write to the shift register with the correct bit set high:
digitalWrite(latchPin, LOW);
// shift the bits out:
shiftOut(dataPin, clockPin, MSBFIRST, Tab);
// turn on the output so the LEDs can light up:
digitalWrite(latchPin, HIGH);
}
}
手头上有一个用2个595 控制8位数码管，
由于接线不一样，
试了N个代码，
显示出来也是乱码~~！
{:soso_e127:} 本帖最后由 pww999 于 2012-10-21 01:34 编辑
4位数码管 引脚图 只找到AVRM16 的代码~
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