8-way PWM function waveform output program can be controlled separately according to the script-EEWORLD

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Detailed production process: http://www.51hei.com/bbs/dpj-25725-1.html

Here is the source code:

#include

//#include

#define ONE_CYCLE_STEP 255

#ifdef AT89C2051_HEADER_FILE

#define PORT P1 //If using STC12C2052, use P1 as the output port

#else

#define PORT P0 //Otherwise use P0 port for output

#endif

#define LED_CNT 4 //Define the output port number 1-8 4 represents the use of 0-3 port output

#define SCRIPT_CNT 6 //Define the script number

//Firefly structure

struct Firefly{

unsigned int brightness; //maximum brightness value 0-255

unsigned int timeCell; //Time interval 0-65535

unsigned int count; //Run control variable: current count

unsigned char bn; //Run control variable: current brightness

};

//Define the execution script for each output port

// Each port will execute SCRIPT_CNT times, and then continue to execute in a loop

struct Firefly code fireFlyScript[][SCRIPT_CNT] = {

{{0,300,0,0},{255,400,0,0},{0,500,0,0},{100,600,0,0},{0,900,0,0},{0,500,0,0}},

{{255,300,0,0},{0,400,0,0},{0,500,0,0},{255,800,0,0},{0,700,0,0},{0,500,0,0}},

{{0,300,0,0},{0,400,0,0},{255,500,0,0},{50,1200,0,0},{0,300,0,0},{0,500,0,0}},

{{128,500,0,0},{255,300,0,0},{50,200,0,0},{0,1000,0,0},{255,1500,0,0},{50,100,0,0}},

{{0,900,0,0},{255,300,0,0},{50,200,0,0},{0,1000,0,0},{255,1500,0,0},{50,100,0,0}},

{{255,400,0,0},{255,300,0,0},{50,200,0,0},{0,1000,0,0},{255,1500,0,0},{50,100,0,0}},

{{0,200,0,0},{255,300,0,0},{50,200,0,0},{0,1000,0,0},{255,1500,0,0},{50,100,0,0}},

{{0,750,0,0},{255,300,0,0},{50,200,0,0},{0,1000,0,0},{255,1500,0,0},{50,100,0,0}}

};

//define LED_CNT only fireflies

struct Firefly fireFlies[LED_CNT];

//Script counter for each firefly

unsigned char ffScript[LED_CNT];

//Pre-calculated cosine function table, PWM output simulation function curve is better

unsigned char code cosValue[]={

0,0,0,0,0,0,0,0,1,1,1,2,2,3,3,4,4,5,6,6,7,8,

9,10,11,11,12,13,14,16,17,18,19,20,21,23,24,

25,27,28,29,31,32,34,35,37,39,40,42,44,45,47,

49,50,52,54,56,58,60,62,63,65,67,69,71,73,75,

77,80,82,84,86,88,90,92,94,97,99,101,103,105,

107,110,112,114,116,119,121,123,125,127,130,

132,134,136,139,141,143,145,148,150,152,154,

156,158,161,163,165,167,169,171,173,175,178,

180,182,184,186,188,190,191,193,195,197,199,

201,203,205,206,208,210,211,213,215,216,218,

220,221,223,224,226,227,228,230,231,232,234,

235,236,237,238,239,241,242,243,244,244,245,

246,247,248,249,249,250,251,251,252,252,253,

253,254,254,254,255,255,255,255,255,255,255,

255,255,255,255,255,255,255,255,254,254,254,

253,253,252,252,251,251,250,249,249,248,247,

246,245,244,244,243,242,241,239,238,237,236,

235,234,232,231,230,228,227,226,224,223,221,

220,218,216,215,213,211,210,208,206,205,203,

201,199,197,195,193,192,190,188,186,184,182,

180,178,175,173,171,169,167,165,163,161,158,

156,154,152,150,148,145,143,141,139,136,134,

132,130,128,125,123,121,119,116,114,112,110,

107,105,103,101,99,97,94,92,90,88,86,84,82,

80,77,75,73,71,69,67,65,64,62,60,58,56,54,52,

50,49,47,45,44,42,40,39,37,35,34,32,31,29,28,

27,25,24,23,21,20,19,18,17,16,14,13,12,11,11,

10,9,8,7,6,6,5,4,4,3,3,2,2,1,1,1,0,0,0,0,0,0,0,

};

//Timer interrupt count variable

unsigned int time0count_0;

//---------------------------------------

//Name: Timer 0 interrupt service routine

// ：Timer0

//parameter:

//return:

//---------------------------------------

void Timer0(void) interrupt 1

{

unsigned long cell; //temporary variable for calculation

unsigned char i,p;

TL0=0xE8; //Re-initialize TL0

TH0=0xFF; //Re-assign the initial value to TH0

//After a cycle ends, check the script and the duty cycle of the next cycle

if(++time0count_0>ONE_CYCLE_STEP)

{

time0count_0 = 0;

//N channels of signal processing

for(i = 0;i

{

//After one script is executed, load the next script

if(++fireFlies[i].count>fireFlies[i].timeCell)

{

ffScript[i]++;

ffScript[i] = ffScript[i] % SCRIPT_CNT;

fireFlies[i] = fireFlyScript[i][ffScript[i]];

}

//Calculate the duty cycle and brightness of the next cycle

cell = fireFlies[i].count;

cell *=360;

cell /= fireFlies[i].timeCell;

fireFlies[i].bn = (cosValue[cell]*fireFlies[i].brightness)/255;

//Prepare to light up an LED

p=1<

//If the brightness value is not 0, light up

if(fireFlies[i].bn != 0)

{

PORT |= p;

}

else

{

PORT &= ~p;

}

//After each output port reaches the duty cycle, it outputs a low level to turn off the LED

for(i = 0; i

{

p=1<

if(time0count_0==fireFlies[i].bn)PORT &= ~p;

}

void main()

{

unsigned i;

// Turn off all LEDs

PORT=0;

//Initialize all fireflies and execute scripts

for(i = 0; i

{

fireFlies[i] = fireFlyScript[i][0];

ffScript[i] = 0;

}

//***Timer 0 initialization***

TMOD&=0xF0; //Clear the lower 4 bits of TMOD timer 0 control part

TMOD|=0x01; //Set timer 0 to mode 1

TL0=0xE8; //Set the initial value of timer 0 to the lower 8 bits

TH0=0xFF; //Set the initial value of timer 0 high 8 bits

TR0=1; //Start timer 0

ET0=1; //Timer0 interrupt enabled

//***Open global interrupt settings****

//Timer Timer0 is set to enable interrupts, and global interrupts need to be enabled here

EA=1; //Open global interrupt

while(1); // infinite loop, after the microcontroller is initialized, it will keep running this infinite loop

}

Keywords：Script Reference address：8-way PWM function waveform output program can be controlled separately according to the script

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