Revision 0:9f02a450001f, committed 2017-10-01

Comitter:

conehead

Date:

Sun Oct 01 07:04:57 2017 +0000

Commit message:

V1;

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sun Oct 01 07:04:57 2017 +0000
@@ -0,0 +1,197 @@
+// Damon Hill - 14234098 - 159.270
+// Assignment 3 - Counters and LCD
+
+#include "mbed.h"
+#define LCD_DATA 1
+#define LCD_INSTRUCTION 0
+
+static void lcdSetRS(int mode);         // LCD functions 
+static void lcdPulseEN(void);           
+void lcdCommand(unsigned char command);     
+void lcdPutChar(unsigned char c);      
+void lcdString(char *s);              
+int waitButton(unsigned int n);     // wait for button press or timeout function
+void bin(void);     // binary counter function
+void dec(void);     // decimal counter function
+void hex(void);     // hexidecimal counter function
+                                                                   
+DigitalOut lcdD4(A2), lcdD5(A3), lcdD6(A4), lcdD7(A5);     // LCD outputs
+DigitalOut lcdEN(A1), lcdRS(A0);
+DigitalIn button (USER_BUTTON);     // button input
+
+Timer t;
+
+int main()
+{
+    lcdEN.write(0); //-- GPIO_WriteBit(GPIOC, LCD_EN, Bit_RESET);
+    wait_us(15000); //-- delay for >15msec second after power on
+    lcdCommand(0x28); // 4bit mode, dual line
+    lcdCommand(0x01); //-- display clear
+    wait_us(2000); // 2msec delay for screen to react
+    lcdCommand(0x06); //-- cursor increments
+    lcdCommand(0x0c); //-- display on, cursor off
+    
+    unsigned short int b = 0;       // variable for wait function output, 1 if button was pressed within time
+
+while(1) {      // two second count loop
+    lcdString("Binary");
+    b = waitButton(2000);       // waits for 2 sec
+    if (b == 1) {   // if button is pressed within time
+        bin();      // count in binary
+        }
+    lcdString("Decimal");
+    b = waitButton(2000);
+    if (b == 1) {
+        dec();
+        }
+    lcdString("Hexideicmal");
+    b = waitButton(2000);
+     if (b == 1) {
+        hex();
+        }
+    }
+}
+
+void lcdString(char *s)  // from serial slides
+{
+    lcdCommand(0x01);       // clear the screen
+    wait_ms(2);
+    
+    register unsigned short int i = 0;
+    while (s[i] != '\0') {      // go through all char until it reaches the end null char 
+        lcdPutChar(s[i]);       // send individually
+        i++;                    // do next one
+    }   
+}
+
+int waitButton(unsigned int n) 
+{
+    t.reset();          // reset timer
+    if (n > 0) {
+        t.start();      // if the time is not 0, start the timer
+        }
+
+    while (button == 0) {       // Waits for user to release the button before program continues
+        }        
+
+    while (t.read_ms() <= n) {
+        if (button == 0) {          // if button is pressed
+            t.stop();       // stop timer
+            return(1);      // return 1, indicating button pressed within the time elapsed
+        }
+        wait_ms(10);        // wait a little bit 
+    }
+    t.stop();       // stop timer
+    return(0);      // return 0, indicating NO button pressed within the time elapsed
+}
+
+void bin() 
+{
+    unsigned int i,n,c,f;       // initilize all local var
+    
+    for (i = 0; i < 16; i++) {      // creates a 0-15 count loop 
+        lcdCommand(0x01);       // clear the screen
+        wait_ms(2);
+        c = 8;          // MSB decimal value
+        n = i;          // temp variable to edit the count number
+        f = 0;          // restart bit counter
+        while (f < 4) {     // for the 4 bits
+            if (n >= c) {       // if the count is equal or more than the current bit (power of two)
+                lcdPutChar('1');        // print 1
+                n = n-c;        // minus the power from the count
+            }
+            else {
+                lcdPutChar('0');        // else print a 0
+            }
+            c = c/2;        // get next power of 2
+            f++;        // do next bit
+            }
+        waitButton(0);      // wait forever till a button is pressed
+    }
+}
+    
+void dec() 
+{
+    unsigned short int i;
+
+    for (i = 0; i < 16; i++) {
+        lcdCommand(0x01);       // clear the screen
+        wait_ms(2);   
+        if (i > 9) {        // for count greater than 9
+            lcdPutChar('1');        // print 1 (for the 10s)
+            lcdPutChar(i-10+ '0');      // print 1s value. 
+            }
+        else {
+            lcdPutChar(i + '0');        // ASCII '0' + an integer, will give the ASCII value of an integer from 0-9  
+            }
+        waitButton(0);      // wait forever till a button is pressed 
+    }
+}
+    
+void hex() 
+{
+    unsigned short int i;
+    
+    for (i = 0; i < 16; i++) {
+        lcdCommand(0x01);       // clear the screen
+        wait_ms(2);
+        if (i > 9) {        // for count greater than 9
+            lcdPutChar(i+7+ '0');       // get the ASCII value for A-F
+            }
+        else {
+            lcdPutChar(i + '0');
+            }
+        waitButton(0);      // wait forever till a button is pressed 
+    }
+}
+
+
+//====[Almost unchanged sample code from lecture slides]======
+//     ||       ||      ||
+//     \/       \/      \/
+static void lcdSetRS(int mode)
+{
+    lcdRS.write(mode);
+}
+static void lcdPulseEN(void)
+{
+    lcdEN.write(1);
+    wait_us(1); //-- enable pulse must be >450ns
+    lcdEN.write(0);
+    wait_us(1);
+}
+
+void lcdCommand(unsigned char command)
+{
+    lcdSetRS(LCD_INSTRUCTION);
+    lcdD4.write((command>>4) & 0x01);
+    lcdD5.write((command>>5) & 0x01);
+    lcdD6.write((command>>6) & 0x01);
+    lcdD7.write((command>>7) & 0x01);
+    lcdPulseEN(); //-- this can't be too slow or it will time out
+    lcdD4.write(command & 0x01);
+    lcdD5.write((command>>1) & 0x01);
+    lcdD6.write((command>>2) & 0x01);
+    lcdD7.write((command>>3) & 0x01);
+    lcdPulseEN();
+    wait_us(37); //-- let it work on the data
+}
+
+void lcdPutChar(unsigned char c)
+{
+    lcdSetRS(LCD_DATA);
+    lcdD4.write((c>>4) & 0x01);
+    lcdD5.write((c>>5) & 0x01);
+    lcdD6.write((c>>6) & 0x01);
+    lcdD7.write((c>>7) & 0x01);
+    lcdPulseEN(); //-- this can't be too slow or it will time out
+    lcdD4.write(c & 0x01);
+    lcdD5.write((c>>1) & 0x01);
+    lcdD6.write((c>>2) & 0x01);
+    lcdD7.write((c>>3) & 0x01);
+    lcdPulseEN();
+    wait_us(37); //-- let it work on the data
+}
+
+
+    

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Sun Oct 01 07:04:57 2017 +0000
@@ -0,0 +1,1 @@
+https://mbed.org/users/mbed_official/code/mbed/builds/e2bfab296f20
\ No newline at end of file