Diff: main.cpp

Revision:

0:284a85288653

Child:

2:50b3bd9af686

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Apr 05 13:36:35 2013 +0000
@@ -0,0 +1,145 @@
+#include <string>
+#include <iostream>
+#include <iomanip>
+
+#include "MCP4xxxx_SPI.h" // Use SPI module #1 and /CS mapped on pin 8
+#include "MCP320x_SPI.h" // Use SPI module #1 and /CS mapped on pin 9
+
+struct UserChoice {
+    char choice;
+    unsigned char potId;
+    unsigned char adcId;
+};
+
+/*
+ * Declare functions
+ */
+void AvailableIndicator(); // LED1 flashing for program while program is alive
+UserChoice DisplayMenuAndGetChoice(); // Display and get the user choice
+
+/*
+ * Declare statics
+ */
+DigitalOut g_availableLed(LED1); // To verify if program in running
+Ticker g_available; // LED1 will flash with a period of 2s
+CMCP4xxxx_SPI g_digitalPot(p5, p6, p7);
+CMCP320x_SPI *g_adc = NULL;
+DigitalOut g_cs3201(p9);  // /CS mapped on pin 8 for MCP3201
+DigitalOut g_cs3208(p10); // /CS mapped on pin 10 for MCP3208
+DigitalOut g_cs42100(p8); // /CS mapped on pin 8 for MCP421pp
+DigitalOut g_cs41050(p11); // /CS mapped on pin 11 for MCP41050
+DigitalOut *g_csCurrentAdc = NULL;
+
+UserChoice g_userChoice; // Used to store user choice from displayed menu
+
+int main() {
+    // Deactivate all SPI devices
+    g_cs3201 = 1;
+    g_cs3208 = 1;
+    g_cs42100 = 1;
+    g_cs41050 = 1;
+
+    unsigned char potLevel = 0x80; // Initial digital potentiometer value
+    
+    // Launch available indicator
+    g_available.attach(&AvailableIndicator, 2.0);
+    
+    while (true) {
+        // Retrieve user choices 
+        g_userChoice = DisplayMenuAndGetChoice();
+        // Set the pot. value
+        //      1. Enable de right digipot
+        switch (g_userChoice.potId) {
+            case 'a':
+                g_cs42100 = 0;
+                break;
+            default:
+                g_cs41050 = 0;
+                break;
+        } // End of 'switch' statement
+        //      2. Apply user action
+        switch (g_userChoice.choice) {
+            case 'a':
+                potLevel += 1;
+                g_digitalPot.Write(CMCP4xxxx_SPI::WriteToPot1, potLevel);
+                break;
+            case 'b':
+                potLevel -= 1;
+                g_digitalPot.Write(CMCP4xxxx_SPI::WriteToPot1, potLevel);
+                break;
+            case 'c':
+                potLevel -= 1;
+                g_digitalPot.Write(CMCP4xxxx_SPI::ShutdownPot1);
+                break;
+            case 'd':
+                //g_digitalPot->Reset();
+                potLevel = 0x80;
+                break;
+            default:
+                std::cout << "Invalid user choice\r" << std::endl;
+                break;
+        } // End of 'switch' statement
+        //      3. Disable de right digipot
+        switch (g_userChoice.potId) {
+            case 'a':
+                g_cs42100 = 1;
+                break;
+            default:
+                g_cs41050 = 1;
+                break;
+        } // End of 'switch' statement
+        
+        // Set adc to use
+        switch (g_userChoice.adcId) {
+            case 'a': // MCP3201
+                g_adc = new CMCP320x_SPI(p5, p6, p7);
+                g_csCurrentAdc = &g_cs3201;
+                break;
+            case 'b': // MCP3208
+                g_adc = new CMCP320x_SPI(p5, p6, p7, NC, CMCP320x_SPI::_3208);
+                g_csCurrentAdc = &g_cs3208;
+                break;
+        } // End of 'switch' statement
+        g_csCurrentAdc->write(0);
+        float sample = g_adc->Read(CMCP320x_SPI::CH3);
+        g_csCurrentAdc->write(1);
+        std::cout << "Voltage at PW0: " << setprecision(5) << sample << "\r" << std::endl;
+        delete g_adc;
+        g_csCurrentAdc = NULL;
+    } // End of 'while' statement
+} // End of program - nerver reached
+
+void AvailableIndicator() {
+    g_availableLed = !g_availableLed;
+} // End of AvailableIndicator
+
+UserChoice DisplayMenuAndGetChoice() {
+    static UserChoice userChoice;
+
+    // Display the title
+    std::cout << "\r" << std::endl << "MCP320x_SPI v0.2\r" << std::endl;
+
+    // Display the pot selection menu
+    std::cout << "\tUse pot #1:\t\t\ta\r" << std::endl;
+    std::cout << "\tUse pot #2:\t\t\tb\r" << std::endl;
+    std::cout << "Enter your choice: " << std::flush;
+    userChoice.potId = getchar();
+    std::cout << "\r" << std::endl << std::flush;
+
+    // Display the adc selection menu
+    std::cout << "\tUse adc 3201:\t\t\ta\r" << std::endl;
+    std::cout << "\tUse adc 3208:\t\t\tb\r" << std::endl;
+    std::cout << "Enter your choice: " << std::flush;
+    userChoice.adcId = getchar();
+    std::cout << "\r" << std::endl << std::flush;
+    
+    // Display the menu
+    std::cout << "\tIncrease level of pot:\t\t\ta\r" << std::endl;
+    std::cout << "\tDecrease level of pot:\t\t\tb\r" << std::endl;
+    std::cout << "\tShutdown pot         :\t\t\tc\r" << std::endl;
+    std::cout << "\tReset pot            :\t\t\td\r" << std::endl;
+    std::cout << "Enter your choice: " << std::flush;
+    userChoice.choice = getchar();
+    std::cout << "\r" << std::endl << std::flush;
+    return userChoice;
+}