Diff: Main/main.cpp

Revision:

0:fabfe08aee13

Child:

1:9359b8534c79

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Main/main.cpp	Wed Nov 01 09:44:56 2017 +0000
@@ -0,0 +1,163 @@
+#include "main.h"
+
+// objects defined here with pin numbers
+DigitalIn button_a(p29);
+DigitalIn button_b(p28);
+DigitalIn button_c(p27);
+DigitalIn button_d(p26);
+
+AnalogIn ldr(p15);
+BusOut leds(LED4,LED3,LED2,LED1);
+Tone speaker(p18);
+
+BusOut rgb_led(p24,p23,p22);
+
+AnalogIn tmp36(p16);
+
+AnalogIn pot_0(p20);
+AnalogIn pot_1(p19);
+AnalogIn pot_2(p17);
+
+N5110 lcd(p8,p9,p10,p11,p13,p21);
+ShiftReg shift;
+
+int seven_seg_array[] = {
+    0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x67
+};
+// array that stores the colors R, G and B
+int rgd_led_array[] = {
+    0b011,0b101,0b110
+};
+
+int led_val = 0;
+
+void init();
+void test_7seg();
+void test_buttons();
+void test_leds();
+void test_ldr();
+void test_tmp();
+void test_pots();
+
+int main()
+{
+    // initialise peripherals
+    init();
+
+    // test the constant outputs
+    test_7seg();
+    leds = 0x0F;  // on-board LEDs
+    speaker.play(1000.0,2.0);
+
+    // loop forever
+    while(1) {
+
+        // clear LCD at beginning of each 'frame'
+        lcd.clear();
+        lcd.printString("Test",0,0);
+
+        // test inputs and outputs that can change
+
+        test_buttons();
+        test_leds();
+        test_ldr();
+        test_tmp();
+        test_pots();
+
+        // print everything on the screen
+        lcd.refresh();
+        // small delay before next frame is drawn
+        wait(1.0/4);
+    }
+
+}
+
+void init()
+{
+    shift.write(0x00);
+
+    lcd.init();
+
+    speaker.init();
+
+    // PCB has external pull-down resistors so turn the internal ones off
+    // (default for DigitalIn)
+    button_a.mode(PullNone);
+    button_b.mode(PullNone);
+    button_c.mode(PullNone);
+    button_d.mode(PullNone);
+}
+
+void test_7seg()
+{
+    shift.write(0xFF);
+}
+
+void test_buttons()
+{
+    // check each button, and print character on screen
+    if ( button_a.read() == 1) {
+        lcd.printChar('A',0,1);
+    }
+    if ( button_b.read() == 1) {
+        lcd.printChar('B',8,1);
+    }
+    if ( button_c.read() == 1) {
+        lcd.printChar('C',16,1);
+    }
+    if ( button_d.read() == 1) {
+        lcd.printChar('D',24,1);
+    }
+}
+
+void test_leds()
+{
+
+    // set RGB to current val
+    rgb_led = rgd_led_array[led_val];
+
+    // increment the val (i.e. change colour combination)
+    led_val++;
+
+    // once we've got to end of array, go back to beginning
+    if (led_val == 3) {
+        led_val = 0;
+    }
+
+}
+
+void test_ldr()
+{
+    float value = ldr.read();  // read in the LDR value in range 0.0 to 1.0
+    char buffer[14];  
+    
+    sprintf(buffer,"LDR=%.2f",value); // print formatted data to buffer
+    lcd.printString(buffer,0,2);           // display on screen
+}
+
+void test_tmp()
+{
+    float value = 3.3*tmp36.read();  // read in the TMP36 value in range 0.0 to 1.0
+    float temperature = 100.0f*value - 50.0f;
+    char buffer[14];  
+    
+    sprintf(buffer,"T=%.4f C",temperature); // print formatted data to buffer
+    lcd.printString(buffer,0,3);           // display on screen
+}
+
+void test_pots() {
+    
+    char buffer[14];  
+
+    float val = pot_0.read();
+    sprintf(buffer,"%.2f",val); // print formatted data to buffer
+    lcd.printString(buffer,0,5);           // display on screen
+
+    val = pot_1.read();
+    sprintf(buffer,"%.2f",val); // print formatted data to buffer
+    lcd.printString(buffer,28,5);           // display on screen
+    
+    val = pot_2.read();
+    sprintf(buffer,"%.2f",val); // print formatted data to buffer
+    lcd.printString(buffer,56,5);           // display on screen
+}
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