Revision 0:5852cc92df20, committed 2014-03-07

Comitter:

gcarmonar

Date:

Fri Mar 07 22:51:03 2014 +0000

Commit message:

Documento ejemplo para los alumnos de inform?tica industrial.

Changed in this revision

diff -r 000000000000 -r 5852cc92df20 main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Mar 07 22:51:03 2014 +0000
@@ -0,0 +1,188 @@
+/* ----------------------------------------------------------
+Informatica Industrial - Timers Avanzado
+
+Programa donde se realizan 3 tareas por piertos:
+   1) Incrementar un contador en un display de 7 segmentos
+   2) Parpadear un led a cierta frecuencia
+   3) Leer datos de un puerto analogico y calcular promedio
+Además realiza las siguientes actividades cuando se presenta
+un evento:
+   1) Leer el estado de un boton y una bandera que evita que
+      se manden a imprimir muchos datos y saturar la
+      comunicacion serie
+   2) Leer el estado de un boton y una bandera que hacen 
+      cambiar el modo de operacion entre un voltimetro y un
+      ohmetro.
+
+Autor: Gerardo Carmona
+Fecha: 28 / Febrero / 2014
+Versión: 1.0
+
+----------------------------------------------------------- */
+
+#include "mbed.h"
+
+//--- O/I Pins ----------------------------------------------
+DigitalOut led_status(D13);  //Just for fun
+                   //A,  B,  C,  D,  E,  F,  G
+BusOut seven_segment(D2, D3, D4, D5, D6, D7, D8);
+DigitalIn select(D9);
+DigitalIn send_data(D10);
+AnalogIn read_voltage(A0);
+AnalogIn read_resistor(A2);
+Timer timer;
+Serial pc(USBTX, USBRX); // tx, rx
+
+//--- Constants ---------------------------------------------
+#define MAX_COUNT 15            //Max count for display
+#define MIN_COUNT 0             //Min count for display
+#define INCREMENT_TIME_MS 1000  //Increment display time
+#define BLINK_LED_TIME_MS 250   //Blink LED
+#define READ_DATA_TIME_MS 500   //Read and convert data
+#define SEND_DATA_TIME_MS 500   //Time to send data to PC
+
+//--- Variables ---------------------------------------------
+int actual_time = 0;
+int last_time = 0;
+int count = 0;
+int mode = 0;   // 0 - Read Voltaje, 1 - Read Resistence
+int mili_volts[10] = {0,0,0,0,0,0,0,0,0,0};
+int resistor_ohms[10] = {0,0,0,0,0,0,0,0,0,0};
+int data = 0;
+int reading_number = 0;
+int array_index = 0;
+
+//--- Functions Declarations --------------------------------
+void increment_display(int c);
+int multimeter(int flag);
+
+//--- Main Program ------------------------------------------
+int main() {
+    timer.start();
+    while(1) {
+        actual_time = timer.read_ms();
+        if (actual_time % INCREMENT_TIME_MS == 0){
+            pc.printf("count: %i\n", count);
+            increment_display(count);
+            if (count < MAX_COUNT){
+                count++;
+            }else{
+                count = MIN_COUNT;
+            }
+        }
+        
+        if (actual_time % BLINK_LED_TIME_MS == 0){
+            led_status = !led_status;
+        }
+        
+        if (actual_time % READ_DATA_TIME_MS == 0){
+            data = multimeter(mode);
+        }
+        
+        
+        if (send_data == 1 && actual_time >= (last_time + SEND_DATA_TIME_MS)){
+            if (mode == 0){
+                pc.printf("Voltaje: %d mV\n", data);
+            }else{
+                pc.printf("no hay infomacion disponible\n");
+            }
+            last_time = actual_time;
+        }
+        
+        if (select == 1 && actual_time >= (last_time + SEND_DATA_TIME_MS)){
+            mode = !mode;
+            last_time = actual_time;
+        }
+        
+            
+    }
+}
+
+//--- Functions --------------------------------------------
+void increment_display(int c){
+    switch (c){
+        case 0:
+            seven_segment = 63; 
+            break;
+        case 1:
+            seven_segment = 6; 
+            break;
+        case 2:
+            seven_segment = 91; 
+            break;
+        case 3:
+            seven_segment = 79; 
+            break;
+        case 4:
+            seven_segment = 102; 
+            break;
+        case 5:
+            seven_segment = 109; 
+            break;
+        case 6:
+            seven_segment = 125; 
+            break;
+        case 7:
+            seven_segment = 7; 
+            break;
+        case 8:
+            seven_segment = 127; 
+            break;
+        case 9:
+            seven_segment = 111; 
+            break;
+        case 10:
+            seven_segment = 119; 
+            break;
+        case 11:
+            seven_segment = 124; 
+            break;
+        case 12:
+            seven_segment = 57; 
+            break;
+        case 13:
+            seven_segment = 94; 
+            break;
+        case 14:
+            seven_segment = 121; 
+            break;
+        case 15:
+            seven_segment = 113; 
+            break;
+        default:
+            seven_segment = 64;
+    }
+}
+
+int multimeter(int flag){
+    int average = 0;
+    float temp = 0;
+    if (flag == 0){
+        temp = read_voltage*36300;  //36300 = 1000(convert to mV) * 3.3(convert to volts) * 11(ratio)
+        mili_volts[array_index] = int(temp);
+        
+        for (int i = 0; i <= reading_number; i++){
+            average += mili_volts[i]; //sum all the values
+        }
+        average = average/(reading_number+1); //calulate the average
+        
+        /* debugging purposes
+        pc.printf("index: %i, ", array_index);
+        pc.printf("actual: %i, promedio: %i, ", mili_volts[array_index], average);
+        pc.printf("reading number: %i\n", reading_number); */
+        
+        array_index++;
+        if (reading_number < 9){
+            reading_number++;       //max number is 9
+        }
+        if (array_index > 9){
+            array_index = 0;        //reset array index
+        }
+        
+    }else{
+        pc.printf("falta hacer la lectura\n");
+    }
+    
+    return average;
+}
+

diff -r 000000000000 -r 5852cc92df20 mbed.bld
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Fri Mar 07 22:51:03 2014 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/8e73be2a2ac1
\ No newline at end of file