/* *	main_entry.c -- the C_Entry for program *	 *	Author: 	lumit-admin <admin@lumit.org> *	Date:		2004-8-26 *	Copyright:	http://www.lumit.org */ #include <stdio.h>//#define SYSCFG		(0x03ff0000)#define UART0_BASE	(SYSCFG + 0xD000)#define UART1_BASE 	(SYSCFG + 0xE000)/* * Serial settings....................... */	#define	ULCON	0x00 #define	UCON	0x04#define	USTAT	0x08#define	UTXBUF	0x0C#define	URXBUF	0x10#define	UBRDIV	0x14/* * Line control register bits............ */ #define	ULCR8bits		(3)#define	ULCRS1StopBit	(0)#define	ULCRNoParity	(0)/* * UART Control Register bits............ */ #define 	UCRRxM	(1)#define 	UCRRxSI	(1 << 2)#define 	UCRTxM	(1 << 3)#define 	UCRLPB	(1 << 7)/* * UART Status Register bits */ #define USROverrun     	(1 << 0)#define	USRParity      	(1 << 1)#define	USRFraming     	(1 << 2)#define	USRBreak       	(1 << 3)#define	USRDTR			(1 << 4)#define	USRRxData      	(1 << 5) #define	USRTxHoldEmpty 	(1 << 6)#define	USRTxEmpty     	(1 << 7)#define GET_STATUS(p)	(*(volatile unsigned  *)((p) + USTAT))#define RX_DATA(s)     	((s) & USRRxData)#define GET_CHAR(p)		(*(volatile unsigned  *)((p) + URXBUF))#define TX_READY(s)    	((s) & USRTxHoldEmpty)#define PUT_CHAR(p,c)  	(*(unsigned  *)((p) + UTXBUF) = (unsigned )(c))#define IRQVector	((unsigned *)0x18)extern int  Angel_IRQ_Address;extern void handler_irq(void);#define SYSCFG	0x03ff0000#define INTPND							((volatile unsigned *)(SYSCFG+0x4004))#define INTMSK							((volatile unsigned *)(SYSCFG+0x4008))#define INT_GLOBAL						(21)#define TMOD				((volatile unsigned *)(SYSCFG+0x6000))  // timer mode register#define TDATA0				((volatile unsigned *)(SYSCFG+0x6004))#define TCNT0				((volatile unsigned *)(SYSCFG+0x600c))int putchar_uart0(int ch){    /* Place your implementation of fputc here     */    /* e.g. write a character to a UART, or to the */    /* debugger console with SWI WriteC            */   	while ( TX_READY(GET_STATUS(UART0_BASE))==0);	    PUT_CHAR(UART0_BASE, ch);	       return ch;}struct __FILE { int handle;   /* Add whatever you need here */};FILE __stdout;int fputc(int ch, FILE *f){    /* Place your implementation of fputc here     */    /* e.g. write a character to a UART, or to the */    /* debugger console with SWI WriteC            */      putchar_uart0( ch );	       return ch;}int ferror(FILE *f){    /* Your implementation of ferror */    return EOF;}#define COUNTDOWN	0x01effff0;static int counter = 0;void  timer_irq (void) { 	// *TMOD	= 0; 	*INTPND	= 1 << 10;	*TDATA0	= COUNTDOWN; // reset interrupt   // -- toggle the LED D4 to show timer interrupt...       printf( "\r\n^ time-ticks = %d !\r\n", counter );    counter = counter + 1;	// -- re-enable interrupts ...	// *TMOD	= 1;	 *(volatile int*)INTMSK &= ~((1 << INT_GLOBAL) | (1 <<10) | (1<<0));	 } void install_irqhandler(void * isr){	/* ARM irq exception vector addr is 0x00000018  */	unsigned int * irq_vec_addr = ( unsigned int * ) 0x18;	/* this is isr entry address, could be another address like 0x3c, 0x58... */	unsigned int * isr_entry_addr = ( unsigned int * ) 0x38;	unsigned int instruction;		/* set the ISR entry at 0x38  */	*isr_entry_addr = (unsigned int)isr;		/* make an instruction: it is machine-code for "ldr  pc, [pc, #(38-18-8)]"  */	instruction = ((unsigned int) isr_entry_addr  - (unsigned int)irq_vec_addr - 0x08) | 0xe59ff000;		/* set this instruction at 0x18  */	*irq_vec_addr = instruction;	}void timer_init (void){  *TMOD		= 0;  *INTPND 	= 0x00000000; 	// Clear pending interrupts .............}void timer_start (void){	  *TDATA0		 = COUNTDOWN;	// reload CT .......................  *TMOD 		|= 0x1;			// enable interval interrupt ...................    *(volatile int*)INTMSK &= ~((1 << INT_GLOBAL) | (1 <<10) | (1<<0));}#include "includes.h"void OSTickISR(void);void Sleep(INT16U uSec){	OSTimeDly((INT16U) (uSec));}void Task1(void * pParam){	timer_init();	timer_start();		while(1)		{		printf( "@\r\n" );		printf( "@\r\n" );		printf( "@ task 1 running ... \r\n" );		printf( "@    Q__Q    \r\n" );		printf( "@   /____\\   \r\n" );		printf( "@   \\____/   \r\n" );		printf( "@    /\\/\\    \r\n" );		printf( "@ __(\\\\//)__ \r\n" );		printf( "@ >__/ww\\__< \r\n" );		printf( "@\r\n" );		printf( "@ go to sleep 5 time-ticks\r\n" );		printf( "@\r\n" );		printf( "@\r\n" );		Sleep(5);	}}/* Task2 print_user_input */void Task2(void * pParam){	while(1)		{		printf( "+++ \r\n" );		printf( "+++ \r\n" );		printf( "+++  task 2 running ... \r\n" );		printf( "+++  ╭︿︿︿╮ \r\n" );		printf( "+++ {/　o　o　\\} \r\n" );		printf( "+++  (　(oo)　) \r\n" );		printf( "+++      ︶ \r\n" );		printf( "+++ \r\n" );		printf( "+++  go to sleep 2 time-ticks\r\n" );		printf( "+++ \r\n" );		printf( "+++ \r\n" );		Sleep(2);	}}#define	N_TASKS			3	// Number of tasks#define	TASK_STK_SIZE	1024		// Stack size, in sizeof OS_STK, or int 32bitOS_STK	TaskStk[N_TASKS][TASK_STK_SIZE];	// Tasks stacksvoid C_Entry( void ){	int	task_1 = 0;	int	task_2 = 1;	counter = 0;	printf( "start kernel ok!\r\n" );	install_irqhandler( (void *)OSTickISR );		OSInit();		OSTaskCreate(Task1, &task_1, &TaskStk[0][TASK_STK_SIZE-1], 0);	OSTaskCreate(Task2, &task_2, &TaskStk[1][TASK_STK_SIZE-1], 1);		OSStart();}