/******************************************************************************/ /* BLINKY.C: LED Flasher */ /******************************************************************************/ /* This file is part of the uVision/ARM development tools. */ /* Copyright (c) 2005-2006 Keil Software. All rights reserved. */ /* This software may only be used under the terms of a valid, current, */ /* end user licence from KEIL for a compatible version of KEIL software */ /* development tools. Nothing else gives you the right to use this software. */ /******************************************************************************/
#include <stdio.h> #include <LPC23xx.H> /* LPC23xx definitions */ #include "LCD.h" /* Graphic LCD function prototypes */ /* Function that initializes LEDs */ void LED_Init(void) { PINSEL10 = 0; /* Disable ETM interface, enable LEDs */ FIO2DIR = 0x000000FF; /* P2.0..7 defined as Outputs */ FIO2MASK = 0x00000000; } /* Function that turns on requested LEd*/ void LED_On (unsigned int num) { FIO2SET = (1 << num); } /* Function that turns off requested LED */ void LED_Off (unsigned int num) { FIO2CLR = (1 << num); } /* Function that outputs value to LEDs*/ void LED_Out(unsigned int value) { FIO2CLR = 0xFF; /* Turn off all LEDs */ FIO2SET = (value & 0xFF); /* Turn on requested LEDs */ } /* Function for displaying bargraph on the LCD display */ void Disp_Bargraph(int pos_x, int pos_y, int value) { int i; set_cursor (pos_x, pos_y); for (i = 0; i < 16; i++) { if (value > 5) { lcd_putchar (0x05); value -= 5; } else { lcd_putchar (value); value = 0; } } } /* Import external IRQ handlers from IRQ.c file */ extern __irq void T0_IRQHandler (void); extern __irq void ADC_IRQHandler (void); /* Import external functions from Serial.c file */ extern void init_serial(void); /* Import external variables from IRQ.c file*/ extern short AD_last; extern unsigned char clock_1s;
int main (void) { int i; short AD_old, AD_value, AD_print;
LED_Init(); /* LED Initialization */
/* Enable and setup timer interrupt, start timer */ T0MR0 = 14399; /* 1msec = 14400-1 at 14.4 MHz */ T0MCR = 3; /* Interrupt and Reset on MR0 */ T0TCR = 1; /* Timer0 Enable */ VICVectAddr4 = (unsigned long)T0_IRQHandler;/* Set Interrupt Vector */ VICVectCntl4 = 15; /* use it for Timer0 Interrupt */ VICIntEnable = (1 << 4); /* Enable Timer0 Interrupt */
/* Power enable, Setup pin, enable and setup AD converter interrupt */ PCONP |= (1 << 12); /* Enable power to AD block */ PINSEL1 = 0x4000; /* AD0.0 pin function select */ AD0INTEN = (1 << 0); /* CH0 enable interrupt */ VICVectAddr18 = (unsigned long)ADC_IRQHandler;/* Set Interrupt Vector */ VICVectCntl18 = 14; /* use it for ADC Interrupt */ VICIntEnable = (1 << 18); /* Enable ADC Interrupt */
init_serial(); /* Init UART */
lcd_init(); lcd_clear(); lcd_print (" LPC2378-EK "); set_cursor (0, 1); lcd_print (" ">http://www.po-star.com");
for (i = 0; i < 20000000; i++); /* Wait for initial display */ //================================ lcd_init(); lcd_clear(); lcd_print (" ADC DEMO "); //================================ while (1) { /* Loop forever */ AD_value = AD_last; /* Read AD_last value */ if (AD_value != AD_last) /* Make sure that AD interrupt did */ AD_value = AD_last; /* not interfere with value reading */ AD_print = AD_value; /* Get unscaled value for printout */ AD_value /= 13; /* Scale to AD_Value to 0 - 78 */ if (AD_old != AD_value) { /* If AD value has changed */ AD_old = AD_value; Disp_Bargraph(0, 1, AD_value); /* Display bargraph according to AD */ } if (clock_1s) { clock_1s = 0; printf ("AD value = 0x%03x\n\r", AD_print); } } }