Yann Garcia / Mbed 2 deprecated MCP23017App

Test application for the library MCP23017_I2C

Dependencies:   DebugLibrary MCP23017_I2C mbed

main.cpp@2:83b9df729e73, 2015-01-09 (annotated)

Committer:
Yann
Date:
Fri Jan 09 15:36:08 2015 +0000
Revision:
2:83b9df729e73
Parent:
1:e981573db063
Child:
3:3f23faf5f7eb
Bug fixed in read method; Add bus support

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Yann 0:1d91b4046326 1 #include <string>
Yann 0:1d91b4046326 2 #include <iostream>
Yann 0:1d91b4046326 3 #include <iomanip>
Yann 0:1d91b4046326 4
Yann 0:1d91b4046326 5 #include "MCP23017_I2C.h"
Yann 0:1d91b4046326 6
Yann 0:1d91b4046326 7 /*
Yann 0:1d91b4046326 8 * Declare functions
Yann 0:1d91b4046326 9 */
Yann 0:1d91b4046326 10 void AvailableIndicator(); // LED1 flashing for program while program is alive
Yann 0:1d91b4046326 11 DigitalOut g_availableLed(LED1); // To verify if program in running
Yann 0:1d91b4046326 12 Ticker g_available; // LED1 will flash with a period of 2s
Yann 0:1d91b4046326 13 char DisplayMenuAndGetChoice();
Yann 1:e981573db063 14 void GpioAIntr(); // Interrupt on GPIOA
Yann 0:1d91b4046326 15
Yann 0:1d91b4046326 16 static CMCP23017_I2C g_gpioExp(p9, p10, 0x27, p15, p16, p17);
Yann 0:1d91b4046326 17
Yann 0:1d91b4046326 18 int main() {
Yann 0:1d91b4046326 19 // Launch available indicator
Yann 0:1d91b4046326 20 g_available.attach(&AvailableIndicator, 2.0);
Yann 0:1d91b4046326 21
Yann 1:e981573db063 22 g_gpioExp.Initialize(0x01); // GpioA<0> as input port, no interrupt mirroring, Active low
Yann 1:e981573db063 23 g_gpioExp.setupInterruptPin(GPA0, AbstractGpioExpender::OnFalling); // A switch with pull-up is connected to GPIOA<0>, interrupt on falling mode
Yann 1:e981573db063 24 g_gpioExp.setIntrACallback(GpioAIntr); // Set callback for interrup on GPIOA<0>
Yann 0:1d91b4046326 25
Yann 0:1d91b4046326 26 while(true) {
Yann 0:1d91b4046326 27 switch (DisplayMenuAndGetChoice()) {
Yann 0:1d91b4046326 28 case 'a':
Yann 0:1d91b4046326 29 g_gpioExp.write(GPB0, 1);
Yann 0:1d91b4046326 30 break;
Yann 0:1d91b4046326 31 case 'b':
Yann 0:1d91b4046326 32 g_gpioExp.write(GPB0, 0);
Yann 0:1d91b4046326 33 break;
Yann 0:1d91b4046326 34 case 'c':
Yann 0:1d91b4046326 35 g_gpioExp.write(GPB2, 1);
Yann 0:1d91b4046326 36 break;
Yann 0:1d91b4046326 37 case 'd':
Yann 0:1d91b4046326 38 g_gpioExp.write(GPB2, 0);
Yann 0:1d91b4046326 39 break;
Yann 1:e981573db063 40 case 'e':
Yann 1:e981573db063 41 g_gpioExp.write(GPB3, 1);
Yann 1:e981573db063 42 break;
Yann 1:e981573db063 43 case 'f':
Yann 1:e981573db063 44 g_gpioExp.write(GPB3, 0);
Yann 1:e981573db063 45 break;
Yann 1:e981573db063 46 case 'g':
Yann 1:e981573db063 47 g_gpioExp.write(GPB7, 1);
Yann 1:e981573db063 48 break;
Yann 1:e981573db063 49 case 'h':
Yann 1:e981573db063 50 g_gpioExp.write(GPB7, 0);
Yann 1:e981573db063 51 break;
Yann 2:83b9df729e73 52 case 'i': {
Yann 2:83b9df729e73 53 std::list<unsigned char> lcdBus;
Yann 2:83b9df729e73 54 lcdBus.push_back(GPA7);
Yann 2:83b9df729e73 55 lcdBus.push_back(GPA6);
Yann 2:83b9df729e73 56 lcdBus.push_back(GPA5);
Yann 2:83b9df729e73 57 lcdBus.push_back(GPA4);
Yann 2:83b9df729e73 58 unsigned char busId = g_gpioExp.createBus(lcdBus);
Yann 2:83b9df729e73 59 g_gpioExp.busWrite(busId, 0x000A); // GPA7=1, GPA6=0, GPA5=1, GPA4=0
Yann 2:83b9df729e73 60 g_gpioExp.deleteBus(busId);
Yann 2:83b9df729e73 61 }
Yann 2:83b9df729e73 62 break;
Yann 0:1d91b4046326 63 case 'r':
Yann 0:1d91b4046326 64 g_gpioExp.reset();
Yann 0:1d91b4046326 65 break;
Yann 0:1d91b4046326 66 default:
Yann 0:1d91b4046326 67 std::cout << "Invalid user choice\r" << std::endl;
Yann 0:1d91b4046326 68 break;
Yann 0:1d91b4046326 69 } // End of 'switch' statement
Yann 0:1d91b4046326 70
Yann 0:1d91b4046326 71 } // End of 'while' loop
Yann 0:1d91b4046326 72 }
Yann 0:1d91b4046326 73
Yann 0:1d91b4046326 74 void AvailableIndicator()
Yann 0:1d91b4046326 75 {
Yann 0:1d91b4046326 76 g_availableLed = !g_availableLed;
Yann 0:1d91b4046326 77 } // End of AvailableIndicator
Yann 0:1d91b4046326 78
Yann 0:1d91b4046326 79 char DisplayMenuAndGetChoice()
Yann 0:1d91b4046326 80 {
Yann 0:1d91b4046326 81 char value;
Yann 0:1d91b4046326 82 std::cout << "\r" << std::endl << "\r" << std::endl << "MCP23017_I2C v0.1\r" << std::endl;
Yann 0:1d91b4046326 83 std::cout << "\tSet PortB-0 :\t\ta\r" << std::endl;
Yann 0:1d91b4046326 84 std::cout << "\tUnset PortB-0 :\t\tb\r" << std::endl;
Yann 1:e981573db063 85 std::cout << "\tSet PortB-2 :\t\tc\r" << std::endl;
Yann 0:1d91b4046326 86 std::cout << "\tUnset PortB-2 :\t\td\r" << std::endl;
Yann 1:e981573db063 87 std::cout << "\tSet PortB-3 :\t\te\r" << std::endl;
Yann 1:e981573db063 88 std::cout << "\tUnset PortB-3 :\t\tf\r" << std::endl;
Yann 1:e981573db063 89 std::cout << "\tSet PortB-7 :\t\tg\r" << std::endl;
Yann 1:e981573db063 90 std::cout << "\tUnset PortB-7 :\t\th\r" << std::endl;
Yann 0:1d91b4046326 91 std::cout << "\tReset device :\t\tr\r" << std::endl;
Yann 0:1d91b4046326 92 std::cout << "Enter your choice: " << std::flush;
Yann 0:1d91b4046326 93 value = getchar();
Yann 0:1d91b4046326 94 std::cout << "\r" << std::endl;
Yann 0:1d91b4046326 95 return value;
Yann 0:1d91b4046326 96 }
Yann 1:e981573db063 97
Yann 1:e981573db063 98 void GpioAIntr() {
Yann 1:e981573db063 99 unsigned char gpioId, gpioValue;
Yann 1:e981573db063 100 wait(0.6); // Debounce timer
Yann 1:e981573db063 101 g_gpioExp.getLastInterruptPin(&gpioId, &gpioValue); // Get interrupt info and clear it
Yann 1:e981573db063 102 std::cout << "\r" << std::endl << "GpioAIntr: interrupt on pin #" << std::hex << std::setw(2) << std::setfill('0') << static_cast<unsigned int>(gpioId) << " - value: " << static_cast<unsigned int>(gpioValue) << "\r" << std::endl;
Yann 1:e981573db063 103 }
Yann 1:e981573db063 104