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This is arduino demo code for KC868-A8S board, you can use for any KC868-A series board just have RS485 interface.
The function is press 6 digital input trigger relay output and feedback relay state to switch panel's LEDs. When press the switch panel buttons, will control KC868-A8S relay output.
arduino code download link:
KC868-HA-A8S-Demo.zip (Size: 1.79 KB / Downloads: 225)
Code: #include "Arduino.h"
#include "PCF8574.h"
#include "CRC16.h"
#include "CRC.h"
#define RS485Address 0x01
#define USB_TX_PIN 1
#define USB_RX_PIN 3
#define M485_TX_PIN 33
#define M485_RX_PIN 32
// Set i2c address
PCF8574 pcf8574o(0x24,4,5);
PCF8574 pcf8574i(0x22,4,5);
unsigned long switch_32_1_state = 0;
uint16_t CRC16_Data = 0;
uint8_t CRC16_Data_H = 0;
uint8_t CRC16_Data_L = 0;
unsigned char Rs485_Str[30] = {0};
String indata="";
String val="";
String outdata="";
void setup()
{
// Serial 0 with USB
Serial.begin(9600,SERIAL_8N1,USB_RX_PIN,USB_TX_PIN);
// Serial 2 with 485
Serial2.begin(9600,SERIAL_8N1,M485_RX_PIN,M485_TX_PIN);
Serial.println();
// Set pinMode to OUTPUT
pcf8574o.pinMode(P0, OUTPUT);
pcf8574o.pinMode(P1, OUTPUT);
pcf8574o.pinMode(P2, OUTPUT);
pcf8574o.pinMode(P3, OUTPUT);
pcf8574o.pinMode(P4, OUTPUT);
pcf8574o.pinMode(P5, OUTPUT);
pcf8574o.pinMode(P6, OUTPUT);
pcf8574o.pinMode(P7, OUTPUT);
Serial.print("Init pcf8574o...");
if (pcf8574o.begin()){
Serial.println("OK");
}else{
Serial.println("KO");
}
pcf8574i.pinMode(P0, INPUT);
pcf8574i.pinMode(P1, INPUT);
pcf8574i.pinMode(P2, INPUT);
pcf8574i.pinMode(P3, INPUT);
pcf8574i.pinMode(P4, INPUT);
pcf8574i.pinMode(P5, INPUT);
pcf8574i.pinMode(P6, INPUT);
pcf8574i.pinMode(P7, INPUT);
Serial.print("Init pcf8574i...");
if (pcf8574i.begin()){
Serial.println("OK");
}else{
Serial.println("KO");
}
pcf8574o.digitalWrite(P0, HIGH);
pcf8574o.digitalWrite(P1, HIGH);
pcf8574o.digitalWrite(P2, HIGH);
pcf8574o.digitalWrite(P3, HIGH);
pcf8574o.digitalWrite(P4, HIGH);
pcf8574o.digitalWrite(P5, HIGH);
pcf8574o.digitalWrite(P6, HIGH);
pcf8574o.digitalWrite(P7, HIGH);
}
void loop()
{
//------------------------------------
//sample IO
PCF8574::DigitalInput di = pcf8574i.digitalReadAll();
if(!((di.p0)&&(di.p1)&&(di.p2)&&(di.p3)&&(di.p4)&&(di.p5)&&(di.p6)&&(di.p7)))
{
if(di.p0==0)
{
if(((switch_32_1_state&0x01)?1:0) == 0 )
{
pcf8574o.digitalWrite(P0, LOW);
switch_32_1_state = switch_32_1_state | (1<<(1-1));
}
else
{
pcf8574o.digitalWrite(P0, HIGH);
switch_32_1_state = switch_32_1_state & (~(1<<(1-1)));
}
}
if(di.p1==0)
{
if(((switch_32_1_state&0x02)?1:0) == 0 )
{
pcf8574o.digitalWrite(P1, LOW);
switch_32_1_state = switch_32_1_state | (1<<(2-1));
}
else
{
pcf8574o.digitalWrite(P1, HIGH);
switch_32_1_state = switch_32_1_state & (~(1<<(2-1)));
}
}
if(di.p2==0)
{
if(((switch_32_1_state&0x04)?1:0) == 0 )
{
pcf8574o.digitalWrite(P2, LOW);
switch_32_1_state = switch_32_1_state | (1<<(3-1));
}
else
{
pcf8574o.digitalWrite(P2, HIGH);
switch_32_1_state = switch_32_1_state & (~(1<<(3-1)));
}
}
if(di.p3==0)
{
if(((switch_32_1_state&0x08)?1:0) == 0 )
{
pcf8574o.digitalWrite(P3, LOW);
switch_32_1_state = switch_32_1_state | (1<<(4-1));
}
else
{
pcf8574o.digitalWrite(P3, HIGH);
switch_32_1_state = switch_32_1_state & (~(1<<(4-1)));
}
}
if(di.p4==0)
{
if(((switch_32_1_state&0x10)?1:0) == 0 )
{
pcf8574o.digitalWrite(P4, LOW);
switch_32_1_state = switch_32_1_state | (1<<(5-1));
}
else
{
pcf8574o.digitalWrite(P4, HIGH);
switch_32_1_state = switch_32_1_state & (~(1<<(5-1)));
}
}
if(di.p5==0)
{
if(((switch_32_1_state&0x20)?1:0) == 0 )
{
pcf8574o.digitalWrite(P5, LOW);
switch_32_1_state = switch_32_1_state | (1<<(6-1));
}
else
{
pcf8574o.digitalWrite(P5, HIGH);
switch_32_1_state = switch_32_1_state & (~(1<<(6-1)));
}
}
if(di.p6==0)
{
if(((switch_32_1_state&0x40)?1:0) == 0 )
{
pcf8574o.digitalWrite(P6, LOW);
switch_32_1_state = switch_32_1_state | (1<<(7-1));
}
else
{
pcf8574o.digitalWrite(P6, HIGH);
switch_32_1_state = switch_32_1_state & (~(1<<(7-1)));
}
}
if(di.p7==0)
{
if(((switch_32_1_state&0x80)?1:0) == 0 )
{
pcf8574o.digitalWrite(P7, LOW);
switch_32_1_state = switch_32_1_state | (1<<(8-1));
}
else
{
pcf8574o.digitalWrite(P7, HIGH);
switch_32_1_state = switch_32_1_state & (~(1<<(8-1)));
}
}
rs485_feedback();
}
while(!((di.p0==1)&&(di.p1==1)&&(di.p2==1)&&(di.p3==1)&&(di.p4==1)&&(di.p5==1)&&(di.p6==1)&&(di.p7==1)))
{
di = pcf8574i.digitalReadAll();
}
//------------------------------------
//read RS485 data
while(Serial2.available()>0)
{
indata+=char(Serial2.read()); //read via 485
delay(2);
if(Serial2.available()<=0)
{
//Serial2.print(indata);
}
}
//------------------------------------
//deal with RS485 data
if(indata.length()>0)
{
val=indata; //
Serial.print(indata);
//----Key control relay command
if((val[0]==RS485Address)&&(val[1]==0x10)&&(val[2]==0x00)&&(val[3]==0x0A)&&(val[4]==0x00)&&(val[5]==0x06)&&(val[6]==0x0C))
{
val[7] = (((val[7]>>4) & 0x0F)*10)+(val[7]& 0x0F); //bcd to hex
val[8] = val[8] & 0x01;
switch_32_1_state = switch_32_1_state ^ (val[8]<<(val[7]-1));
val[9] = (((val[9]>>4) & 0x0F)*10)+(val[9]& 0x0F); //bcd to hex
val[10] = val[10] & 0x01;
switch_32_1_state = switch_32_1_state ^ (val[10]<<(val[9]-1));
val[11] = (((val[11]>>4) & 0x0F)*10)+(val[11]& 0x0F); //bcd to hex
val[12] = val[12] & 0x01;
switch_32_1_state = switch_32_1_state ^ (val[12]<<(val[11]-1));
val[13] = (((val[13]>>4) & 0x0F)*10)+(val[13]& 0x0F); //bcd to hex
val[14] = val[14] & 0x01;
switch_32_1_state = switch_32_1_state ^ (val[14]<<(val[13]-1));
val[15] = (((val[15]>>4) & 0x0F)*10)+(val[15]& 0x0F); //bcd to hex
val[16] = val[16] & 0x01;
switch_32_1_state = switch_32_1_state ^ (val[16]<<(val[15]-1));
val[17] = (((val[17]>>4) & 0x0F)*10)+(val[17]& 0x0F); //bcd to hex
val[18] = val[18] & 0x01;
switch_32_1_state = switch_32_1_state ^ (val[18]<<(val[17]-1));
//switch_1_state
if(((switch_32_1_state&0x01)?1:0) == 0 )
{
pcf8574o.digitalWrite(P0, HIGH);
}
else
{
pcf8574o.digitalWrite(P0, LOW);
}
//switch_2_state
if(((switch_32_1_state&0x02)?1:0) == 0 )
{
pcf8574o.digitalWrite(P1, HIGH);
}
else
{
pcf8574o.digitalWrite(P1, LOW);
}
//switch_3_state
if(((switch_32_1_state&0x04)?1:0) == 0 )
{
pcf8574o.digitalWrite(P2, HIGH);
}
else
{
pcf8574o.digitalWrite(P2, LOW);
}
//switch_4_state
if(((switch_32_1_state&0x08)?1:0) == 0 )
{
pcf8574o.digitalWrite(P3, HIGH);
}
else
{
pcf8574o.digitalWrite(P3, LOW);
}
//switch_5_state
if(((switch_32_1_state&0x10)?1:0) == 0 )
{
pcf8574o.digitalWrite(P4, HIGH);
}
else
{
pcf8574o.digitalWrite(P4, LOW);
}
//switch_6_state
if(((switch_32_1_state&0x20)?1:0) == 0 )
{
pcf8574o.digitalWrite(P5, HIGH);
}
else
{
pcf8574o.digitalWrite(P5, LOW);
}
//switch_7_state
if(((switch_32_1_state&0x40)?1:0) == 0 )
{
pcf8574o.digitalWrite(P6, HIGH);
}
else
{
pcf8574o.digitalWrite(P6, LOW);
}
//switch_8_state
if(((switch_32_1_state&0x80)?1:0) == 0 )
{
pcf8574o.digitalWrite(P7, HIGH);
}
else
{
pcf8574o.digitalWrite(P7, LOW);
}
rs485_feedback();
}
}
indata=""; //clear indata
//--------------------------------------------------
delay(30);
}
void rs485_feedback(void)
{
Rs485_Str[0] = RS485Address;
Rs485_Str[1] = 0x03;
Rs485_Str[2] = 0x06;
Rs485_Str[3] = 0x55;
Rs485_Str[4] = 0xAA;
Rs485_Str[5] = (int)((switch_32_1_state >> 24) & 0xFF);
Rs485_Str[6] = (int)((switch_32_1_state >> 16) & 0xFF);
Rs485_Str[7] = (int)((switch_32_1_state >> 8) & 0xFF);
Rs485_Str[8] = (int)(switch_32_1_state & 0xFF);
outdata = "12345678901";
outdata[0] = Rs485_Str[0];
outdata[1] = Rs485_Str[1];
outdata[2] = Rs485_Str[2];
outdata[3] = Rs485_Str[3];
outdata[4] = Rs485_Str[4];
outdata[5] = Rs485_Str[5];
outdata[6] = Rs485_Str[6];
outdata[7] = Rs485_Str[7];
outdata[8] = Rs485_Str[8];
CRC16_Data = (crc16((uint8_t *) Rs485_Str, 9, 0x8005, 0xFFFF, 0, true, true));
CRC16_Data_H = CRC16_Data/256;
CRC16_Data_L = CRC16_Data%256;
outdata[9] = CRC16_Data_L;
outdata[10] = CRC16_Data_H;
Serial.print(outdata);
Serial2.print(outdata);
}
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