main.cpp

00001 #include <string>
00002 #include <iostream>
00003 #include <iomanip>
00004 #include <mbed.h>
00005 #include <math.h>
00006 /**
00007  * Tests were done with schema proposed here: DS11195C-page 11 FIGURE 2-25: Potentiometer Divider Non-Linearity Error Test Circuit (DNL, INL)
00008  */
00009 #include "MCP4xxxx_SPI.h"
00010 
00011 struct UserChoice {
00012     char choice;
00013     unsigned char moduleId;
00014 };
00015 
00016 /*
00017  * Declare functions
00018  */
00019 void AvailableIndicator(); // LED1 flashing for program while program is alive
00020 UserChoice DisplayMenuAndGetChoice(); // Display and get the user choice
00021 
00022 /*
00023  * Declare statics
00024  */
00025 
00026 DigitalOut chipSelect[] = {p8,p9,p10};    // c -  MAIS SIGNIFICATIVO
00027 
00028 
00029 
00030 CMCP4xxxx_SPI g_digitalPot(p5, p6, p7, NC, NC, NC); // Create an instance of the class CMCP4xxxx_SPI, p5/p6/p7: SPI#1, /CS managed by library, /RESET input not connected, , /SHDN input not connected
00031 
00032 int main() {
00033 
00034     //unsigned int potLevel1 = 0x0; // Initial digital potentiometer value
00035     //unsigned int potLevel2 = 0x0; // Initial digital potentiometer value
00036     
00037     int value = 0;
00038     int num_pot = 0;
00039 
00040     while (true) 
00041     {
00042         do {
00043         
00044         printf("\r\nDigite o numero do potenciometro (1 a 8):");
00045         scanf("%d", &num_pot);
00046         }while(num_pot < 1 || num_pot > 12);
00047     
00048         do {
00049         
00050         printf("\r\nDigite o valor do volume (0 a 8):");
00051         scanf("%d", &value);
00052         }while(value < 0 || value >255);
00053         
00054         
00055            
00056         chipSelect[0].write(((num_pot-1) >> 2) & 0x1);
00057         chipSelect[1].write(((num_pot-1) >> 1) & 0x1);
00058         chipSelect[2].write(((num_pot-1) >> 0) & 0x1);
00059         
00060         int value2 = 256 - (pow((double)2,(double)value));
00061         printf("Value = %d", value2);
00062         
00063         g_digitalPot.Write(CMCP4xxxx_SPI::WriteToPot1, value2);
00064         
00065         
00066         
00067         chipSelect[0].write(1);
00068         chipSelect[1].write(1);
00069         chipSelect[2].write(1);
00070 /*
00071 
00072         g_chipSelect1.write(0);
00073         
00074         g_digitalPot.Write(CMCP4xxxx_SPI::WriteToPot1, potLevel1);
00075 
00076         
00077         g_chipSelect1.write(1);
00078         
00079         
00080         g_chipSelect2.write(0);
00081         
00082         g_digitalPot.Write(CMCP4xxxx_SPI::WriteToPot1, potLevel2);
00083 
00084         
00085         g_chipSelect2.write(1);
00086         
00087         potLevel1+=1;
00088         potLevel2-=1;
00089         
00090         g_chipSelect2.write(0);        
00091         g_digitalPot.Write(CMCP4xxxx_SPI::WriteToPot1, potLevel2);
00092         g_chipSelect2.write(1);*/
00093     
00094     }
00095 
00096             
00097 }
00098 
00099