Revision 0:d322a5241da8, committed 2009-12-16
- Comitter:
- Kaikestu
- Date:
- Wed Dec 16 12:04:23 2009 +0000
- Commit message:
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/ADC_setup.cpp Wed Dec 16 12:04:23 2009 +0000
@@ -0,0 +1,48 @@
+// ADC_setup.cpp
+
+#include "header.h"
+/*****************************************************
+ variables and defines
+ ****************************************************/
+
+int ADC_channel=1; // ADC channel 1
+
+/*****************************************************
+ subroutines
+*****************************************************/
+void ADC_init(){
+
+ PINSEL1=0x00010000; //set AD0.1 pin to 0000 0000 0000 0001 0000 0000 0000 0000 = ADC
+ PCONP |= (1 << 12); // enable ADC clock
+ AD0CR = (1 << ADC_channel) // channel 1
+ | (4 << 8) // This gives us 3MHz
+ | (0 << 16) // BURST = 0, software control
+ | (0 << 17) // CLKS = 0 (11-bits)
+ | (1 << 21) // PDN = 1
+ | (0 << 22) // TEST1:0 = 00
+ | (1 << 24) // START = 1 start A/D conversion
+ | (0 << 27); // EDGE = 0 (CAP/MAT singal falling,trigger A/D conversion)
+}
+float ADC_read() {
+
+ int data;
+
+ // start A/D conversion on channel
+ AD0CR &= (AD0CR & 0xFFFFFF00);
+ AD0CR |= (1 << ADC_channel) | (1 << 24);
+
+ delay_l();
+
+ // wait for it to finish by polling the ADC DONE bit
+ while((AD0GDR & 0x80000000) == 0)
+ {
+ }
+
+ // get the data and stop the adc
+ data = AD0GDR;
+ AD0CR &= 0xF8FFFFFF;
+
+ // shift data and mask to give 8-bit ADC value
+ data=(data>>8)&0x00000FF;
+ return data;
+ }
\ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/LCD_setup.cpp Wed Dec 16 12:04:23 2009 +0000
@@ -0,0 +1,113 @@
+// LCD_setup.cpp
+
+#include "header.h"
+/*****************************************************
+ subroutines
+*****************************************************/
+/****initialise LCD function ****/
+void LCD_init(void){
+ delay_l();
+ FIO2DIR0=0xFF; /* set port 2 byte 0 (ctrl) to output */
+ FIO2PIN0=0x00; //clear Port 2 byte 0
+ //FIO2PIN bit0=R/W (read/write)
+ //FIO2PIN bit1=RS (register select)
+ //FIO2PIN bit2=E (enable)
+ //all initialised low
+
+ // set Port 0 and 1 to operate as fast registers
+ SCS |= 0x00000001; // by setting the GPIOM bit of the SCS register
+ FIO0DIR2=0xFF; // set port 0 byte 2 (data) to output
+ FIO0PIN2=0x00; // clear Port 0 byte 2
+
+ /* RS already initialised to 'instruction' (low) */
+
+ /**** Function set*/
+ FIO0PIN2=0x38; /* 2-line mode, 7 dot characters */
+ toggle_enable();
+
+ /**** Display on/off*/
+ FIO0PIN2=0x0C; /* display on, cursor off, blink off */
+ toggle_enable();
+
+ /**** Clear display */
+ FIO0PIN2=0x01; /* clear */
+ toggle_enable();
+
+ /**** Set entry mode */
+ FIO0PIN2=0x06; /* increment cursor, shift off */
+ toggle_enable();
+
+}
+
+
+/**** LCD Display 'Voltmeter' */
+void LCD_displayV(){
+ FIO2CLR0=0x02; /* set RS to 'control' */
+ FIO0PIN2=0x01; /* clear display*/
+ toggle_enable();
+ FIO2SET0=0x02; /* set RS to 'data' */
+
+ FIO0PIN2=_sp; // process and display character
+ toggle_enable();
+ FIO0PIN2=_sp;
+ toggle_enable();
+ FIO0PIN2=_sp;
+ toggle_enable();
+ FIO0PIN2=_V;
+ toggle_enable();
+ FIO0PIN2=_O;
+ toggle_enable();
+ FIO0PIN2=_L;
+ toggle_enable();
+ FIO0PIN2=_T;
+ toggle_enable();
+ FIO0PIN2=_M;
+ toggle_enable();
+ FIO0PIN2=_E;
+ toggle_enable();
+ FIO0PIN2=_T;
+ toggle_enable();
+ FIO0PIN2=_E;
+ toggle_enable();
+ FIO0PIN2=_R;
+ toggle_enable();
+
+ /* start of line 2 */
+ FIO2CLR0=0x02; /* set RS to 'instruction' */
+ FIO0PIN2=0xC6; /* set address to line 2 */
+ toggle_enable();
+ FIO2SET0=0x02; /* set RS to 'data' */
+
+ FIO0PIN2=_0;
+ toggle_enable();
+ FIO0PIN2=0x2e;
+ toggle_enable();
+ FIO0PIN2=_0;
+ toggle_enable();
+ FIO0PIN2=_V;
+ toggle_enable();
+}
+
+/*** toggle_enable */
+void toggle_enable(void){
+ FIO2SET0=0x04; // Toggle enable flag on */
+ delay_s();
+ FIO2CLR0=0x04; /* Toggle enable flag off */
+ delay_s();
+}
+
+/**************************************************************************
+* DEM16217 LCD connected to mbed as follows:
+**************************************************************************
+RW = Read/Write = LCD pin05 = mbed pin16 = LPC pin75 = GPIO P2.0 (Port2,byte0,bit0)
+RS = RegisterSelect = LCD pin04 = mbed pin15 = LPC pin74 = GPIO P2.1 (0,1)
+E = Enable = LCD pin06 = mbed pin14 = LPC pin73 = GPIO P2.2 (0,2)
+DB0 = Data Bit 0 = LCD pin07 = mbed pin10 = LPC pin63 = GPIO P0.16 (Port0,byte2,bit0)
+DB1 = Data Bit 1 = LCD pin08 = mbed pin08 = LPC pin61 = GPIO P0.17 (2,1)
+DB2 = Data Bit 2 = LCD pin09 = mbed pin07 = LPC pin60 = GPIO P0.18 (2,2)
+DB3 = Data Bit 3 = LCD pin10 = mbed pin06 = LPC pin59 = GPIO P0.19 (2,3)
+DB4 = Data Bit 4 = LCD pin11 = mbed pin05 = LPC pin58 = GPIO P0.20 (2,4)
+DB5 = Data Bit 5 = LCD pin12 = mbed pin04 = LPC pin57 = GPIO P0.21 (2,5)
+DB6 = Data Bit 6 = LCD pin13 = mbed pin03 = LPC pin56 = GPIO P0.22 (2,6)
+DB7 = Data Bit 7 = LCD pin14 = mbed pin36 = LPC pin09 = GPIO P0.23 (2,7)
+**************************************************************************/
\ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/header.h Wed Dec 16 12:04:23 2009 +0000
@@ -0,0 +1,125 @@
+/* header.h header file */
+
+/*******************************************************/
+/* function prototypes */
+/*******************************************************/
+
+/* main.cpp prototypes */
+
+/* ADC_setup.cpp prototypes */
+void ADC_init(void);
+float ADC_read(void);
+
+/* LDC_setup.cpp prototypes */
+void LCD_init(void);
+void LCD_displayV(void);
+void toggle_enable(void);
+
+/* mbed_functions.cpp prototypes*/
+void delay_s(void);
+void delay_l(void);
+
+/********************************************************/
+/* #defines */
+/********************************************************/
+
+// *** mc9s12dp256 register addresses
+
+ // Pin Assignment
+ #define PINSEL_BASE_ADDR 0xE002C000
+ //PINSEL1
+ #define PINSEL1 (*(volatile unsigned long *)(PINSEL_BASE_ADDR + 0x04))
+
+ //SCS - System Controls and Status, & Power Control */
+ #define SCB_BASE_ADDR 0xE01FC000
+ #define SCS (*(volatile unsigned long *)(SCB_BASE_ADDR + 0x1A0))
+ #define PCONP (*(volatile unsigned long *)(SCB_BASE_ADDR + 0x0C4))
+
+ // Digital IO registers
+ #define FIO_BASE_ADDR 0x3FFFC000
+ //FIO2DIR0
+ #define FIO2DIR0 (*(volatile unsigned char *)(FIO_BASE_ADDR + 0x40))
+ //FIO2PIN0
+ #define FIO2PIN0 (*(volatile unsigned char *)(FIO_BASE_ADDR + 0x54))
+ //FIO2CLR0
+ #define FIO2CLR0 (*(volatile unsigned char *)(FIO_BASE_ADDR + 0x5C))
+ //FIO2SET0
+ #define FIO2SET0 (*(volatile unsigned char *)(FIO_BASE_ADDR + 0x58))
+ //FIO0DIR2
+ #define FIO0DIR2 (*(volatile unsigned char *)(FIO_BASE_ADDR + 0x02))
+ //FIO0PIN2
+ #define FIO0PIN2 (*(volatile unsigned char *)(FIO_BASE_ADDR + 0x16))
+
+ // ADC registers
+ #define AD0_BASE_ADDR 0xE0034000
+ //AD0CR
+ #define AD0CR (*(volatile unsigned long *)(AD0_BASE_ADDR + 0x00))
+ //AD0GDR
+ #define AD0GDR (*(volatile unsigned long *)(AD0_BASE_ADDR + 0x04))
+
+
+/* LCD display constants */
+#define _sp 0x20 /* space */
+#define _eq 0x3d /* = sign */
+#define _0 0x30
+#define _1 0x31
+#define _2 0x32
+#define _3 0x33
+#define _4 0x34
+#define _5 0x35
+#define _6 0x36
+#define _7 0x37
+#define _8 0x38
+#define _9 0x39
+#define _A 0x41
+#define _B 0x42
+#define _C 0x43
+#define _D 0x44
+#define _E 0x45
+#define _F 0x46
+#define _G 0x47
+#define _H 0x48
+#define _I 0x49
+#define _J 0x4a
+#define _K 0x4b
+#define _L 0x4c
+#define _M 0x4d
+#define _N 0x4e
+#define _O 0x4f
+#define _P 0x50
+#define _Q 0x51
+#define _R 0x52
+#define _S 0x53
+#define _T 0x54
+#define _U 0x55
+#define _V 0x56
+#define _W 0x57
+#define _X 0x58
+#define _Y 0x59
+#define _Z 0x5a
+#define _a 0x61
+#define _b 0x62
+#define _c 0x63
+#define _d 0x64
+#define _e 0x65
+#define _f 0x66
+#define _g 0x67
+#define _h 0x68
+#define _i 0x69
+#define _j 0x6a
+#define _k 0x6b
+#define _l 0x6c
+#define _m 0x6d
+#define _n 0x6e
+#define _o 0x6f
+#define _p 0x70
+#define _q 0x71
+#define _r 0x72
+#define _s 0x73
+#define _t 0x74
+#define _u 0x75
+#define _v 0x76
+#define _w 0x77
+#define _x 0x78
+#define _y 0x79
+#define _z 0x7a
\ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Wed Dec 16 12:04:23 2009 +0000
@@ -0,0 +1,122 @@
+//main.cpp
+/****************************************************************
+* Include files
+****************************************************************/
+#include "header.h"
+
+/****************************************************************
+* data values
+****************************************************************/
+#define cal -200 // calibration value
+
+int A2D_in; /* input variable */
+int V_in; /* input voltage */
+int V_unit; /* voltage units value */
+int V_unit_old; // previous unit value
+int V_in_dec; /* input voltage decimal value */
+int V_dec; /* voltage decimal value */
+int V_dec_old; // previous decimal value
+float x;
+
+/****************************************************************
+* Main part of the program
+****************************************************************/
+int main()
+{
+
+ ADC_init();
+ LCD_init();
+ LCD_displayV();
+
+while(1){ /* infinite loop */
+
+ A2D_in=ADC_read();
+ V_in=A2D_in*33; /* calculate voltage from 8-bit ADC input 0xFF = 3.3V */
+ // all voltage values multiplied by 10 to allow integer manipulation
+
+
+ //****************** calculate voltage unit = 0-5V ******************************
+ if(V_in >= 50*255) // if greater than 5V then unit to display = 5
+ {
+ V_unit = 0x05;
+ V_in_dec = 0; // if unit = 5 then decimal must be 0 (5.0V=max)
+ }
+ else if(V_in > 40*255) // else if greater than 4V then unit to display = 4
+ {
+ V_unit = 0x04;
+ V_in_dec = V_in-40*256; // calculate remainder for decimal processing
+ }
+ else if(V_in > 30*255) // else if greater than 3V then unit to display = 3
+ {
+ V_unit = 0x03;
+ V_in_dec = V_in-30*256;
+ }
+ else if(V_in > 20*255) // else if greater than 2V then unit to display = 2
+ {
+ V_unit = 0x02;
+ V_in_dec = V_in-20*256;
+ }
+ else if(V_in > 10*255) // else if greater than 1V then unit to display = 1
+ {
+ V_unit = 0x01;
+ V_in_dec = V_in-10*256;
+ }
+ else // else unit to display = 0
+ {
+ V_unit = 0x00;
+ V_in_dec = V_in;
+ }
+
+ // if unit has changed, then display the new unit on the screen
+ if (V_unit!= V_unit_old){
+
+ // start of line 2
+ FIO2CLR0=0x02; /* set RS to 'instruction' */
+ FIO0PIN2=0xC6; /* set address to line 2 units position*/
+ toggle_enable();
+ FIO2SET0=0x02; /* set RS to 'data' */
+
+ FIO0PIN2=(0x30+V_unit); // display unit value on screen
+ toggle_enable();
+ V_unit_old=V_unit;
+ }
+
+
+ //****************** calculate decimal value = .0 - .9 ******************************
+ if(V_in_dec <=260+cal)
+ V_dec = 0x00;
+ if(V_in_dec > 260+cal) // decimal value must be between 0 and 2550 (ie 255*10)
+ V_dec = 0x01;
+ if(V_in_dec > 510+cal) // calibration value allows an amount of simple tuning
+ V_dec = 0x02; // any error should be linear, but maybe with an offset
+ if(V_in_dec > 770+cal) // a complete look-up table would be better though!
+ V_dec = 0x03;
+ if(V_in_dec > 1120+cal)
+ V_dec = 0x04;
+ if(V_in_dec > 1280+cal)
+ V_dec = 0x05;
+ if(V_in_dec > 1530+cal)
+ V_dec = 0x06;
+ if(V_in_dec > 1780+cal)
+ V_dec = 0x07;
+ if(V_in_dec > 2040+cal)
+ V_dec = 0x08;
+ if(V_in_dec > 2300+cal)
+ V_dec = 0x09;
+
+ // if decimal value has changed then update display
+ if (V_dec!= V_dec_old){
+
+ // start of line 2 */
+ FIO2CLR0=0x02; /* set RS to 'instruction' */
+ FIO0PIN2=0xC8; /* set address to line 2 */
+ toggle_enable();
+ FIO2SET0=0x02; /* set RS to 'data' */
+
+ FIO0PIN2=(0x30+V_dec);
+ toggle_enable();
+ V_dec_old=V_dec;
+ }
+ }
+
+} /* end main() */
\ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld Wed Dec 16 12:04:23 2009 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/00a04e5cd407
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed_functions.cpp Wed Dec 16 12:04:23 2009 +0000
@@ -0,0 +1,23 @@
+// mbed_functions.cpp
+
+#include "header.h"
+/*****************************************************
+ subroutines - commonly used functions
+*****************************************************/
+
+/*** short delay */
+void delay_s(void){
+ int j; /* loop variable */
+
+ for(j=0;j<2000;j++){
+ asm("NOP");
+ }
+}
+/*** long delay */
+void delay_l(void){
+ int i; /* loop variable */
+
+ for(i=0;i<500;i++){
+ delay_s();
+ }
+}
\ No newline at end of file
David Buck