Update ADC module.

update adc module ,add ads7830.

Libs/C-Libs/ADCDevice/ADCDevice.cpp

@@ -0,0 +1,68 @@
+/**********************************************************************
+* Filename    : ADCDevice.cpp
+* Description : Freenove ADC Module library.
+* Author      : www.freenove.com
+* modification: 2020/03/06
+**********************************************************************/
+#include "ADCDevice.hpp"
+
+ADCDevice::ADCDevice(){
+    address = 0;
+    wiringPiSetup(); //Initialize wiringPi.
+}
+
+int ADCDevice::detectI2C(int addr){
+    _fd = wiringPiI2CSetup (addr);   
+    if (_fd < 0){		
+	printf("Error address : 0x%x \n",addr);
+	return 0 ;
+    } 
+    else{	
+	if(wiringPiI2CWrite(_fd,0) < 0){
+	    printf("Not found device in address 0x%x \n",addr);
+	    return 0;
+	}
+	else{
+	    printf("Found device in address 0x%x \n",addr);
+	    return 1 ;
+	}
+    }
+}
+
+int ADCDevice::analogRead(int chn){
+    printf("Implemented in subclass! \n");
+    return 0;
+}
+
+
+PCF8591::PCF8591(int addr)
+{
+    address = addr;
+    cmd = 0x40;		//The default command for PCF8591 is 0x40.
+    wiringPiSetup();
+    detectI2C(address);
+    printf("PCF8591 setup successful! \n");
+}
+int PCF8591::analogRead(int chn){
+    wiringPiI2CWrite(_fd, cmd+chn);
+    wiringPiI2CRead(_fd);
+    wiringPiI2CWrite(_fd, cmd+chn);
+    return wiringPiI2CRead(_fd);
+}
+int PCF8591::analogWrite(int value){
+    return wiringPiI2CWriteReg8(_fd, cmd, value);
+}
+
+ADS7830::ADS7830(int addr)
+{
+    address = addr;
+    cmd = 0x84;
+    wiringPiSetup();
+    detectI2C(address);
+    printf("ADS7830 setup successful! \n");
+}
+
+int ADS7830::analogRead(int chn){
+    wiringPiI2CWrite(_fd, cmd|(((chn<<2 | chn>>1)&0x07)<<4));
+    return wiringPiI2CRead(_fd);
+}

Libs/C-Libs/ADCDevice/ADCDevice.hpp

@@ -0,0 +1,37 @@
+/**********************************************************************
+* Filename    : ADCDevice.hpp
+* Description : Header file of Freenove ADC Module library.
+* Author      : www.freenove.com
+* modification: 2020/03/06
+**********************************************************************/
+#include <wiringPi.h>
+#include <wiringPiI2C.h>
+#include <stdio.h>
+
+class ADCDevice{
+        
+    protected:
+        int _fd;
+    public:
+        int address;
+        int cmd;
+        
+        ADCDevice();
+        virtual ~ADCDevice(){};
+        int detectI2C(int addr);
+        virtual int analogRead(int chn);
+        //~ADCDevice(){printf("Destructor ... \n");}
+};
+
+class PCF8591:public ADCDevice{
+    public:        
+        PCF8591(int addr = 0x48);  //0x48 is the default i2c address for PCF8591 Module.
+        int analogRead(int chn);     //PCF8591 has 4 ADC input pins, chn:0,1,2,3
+        int analogWrite(int value); //PCF8591 has DAC function
+};
+
+class ADS7830:public ADCDevice{
+    public:        
+        ADS7830(int addr = 0x4b);  //0x4b is the default i2c address for ADS7830 Module.
+        int analogRead(int chn); //ADS7830 has 8 ADC input pins, chn:0,1,2,3,4,5,6,7
+};

Libs/C-Libs/ADCDevice/build.sh

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+#!/bin/sh
+
+current_file=$0
+cd "$(dirname "$current_file")"
+
+g++ -c ADCDevice.cpp
+g++ -shared -fPIC -o libADCDevice.so ADCDevice.o
+sudo cp ADCDevice.hpp /usr/include/
+sudo cp libADCDevice.so /usr/lib
+sudo ldconfig
+
+echo "build completed!"