main.c

做的是LCD液晶显示实验

/*
 **********************************************************
 *  main.c
 *  Copyright(C) 2001-2002 Triscend Corporation. All Rights Reserved.
 *  This file is licensed under the terms of Triscend SDK License Agreement.
 **********************************************************
 */

#include <a7hal.h>
#include <stdio.h>
#include <stdlib.h>

#include "main.h"
#include "syy.h"
#include "grass.h"

#define keyctrl 	*( ( unsigned char * ) KEYCONTROLLINE )
#define keystat  	*( ( unsigned char * ) KEYSTATUSLINE )

#define mseqrst  	*( ( unsigned char * ) mseqreset )
#define pwmcnt  	*( ( unsigned char * ) PWMCOUNT )


#define lcden	  	*( ( unsigned char * ) lcdenable )
#define lcdrst	 	*( ( unsigned char * ) lcdreset )


#define	DMA_SEL_REG_LCD		*( ( unsigned long * ) DMATFTLCD )
#define DMA_IRQ_LCD		A7HAL_INT_LVL_DMA1
#define	DMA_CHANNEL_LCD     	1
#define MAX_DESCRIPTORS		4

#define DMA1_CONTRL_REG 	*( ( unsigned long * )  0xD1010840)
#define DMA1_IN_ENABLE_REG 	*( ( unsigned long * )  0xD1010844)
#define DMA1_SRC_ADR_REG 	*( ( unsigned long * )  0xD1010854)
#define DMA1_DST_ADR_REG 	*( ( unsigned long * )  0xD1010858)
#define DMA1_TRS_CNT_REG 	*( ( unsigned long * )  0xD101085c)

#define DMA0_CONTRL_DISEN 	0x00000000
#define DMA0_CONTRL_EN 		0x11111111
#define DMA1_CONTRL_DISEN 	0x22222222
#define DMA1_CONTRL_EN 		0x33333333
#define DMA2_CONTRL_DISEN 	0x44444444
#define DMA2_CONTRL_EN 		0x55555555
#define DMA3_CONTRL_DISEN 	0x66666666
#define DMA3_CONTRL_EN 		0x77777777

//Data definitions
static a7hal_dma_mem_to_io descriptors[3];

unsigned int LCDDataBuf[38400]; //0x25800 LENGTH IN BYTE

///changes for dubblebuffer///
unsigned int LCDDataBuf1[38400]; //0x25800 LENGTH IN BYTE
unsigned int *pLCDDataBuf;
unsigned char bLCDDataChange;
///changes for dubblebuffer///

//For DMA 
void initDescriptors( void );
void initDMA( int channel );
void StartDisplayDMA( void );
void DMA1TransferDone( unsigned long channel );



/*  Watchdog Interrupt Handler */
void watchdogISR( unsigned long param )
{
    a7hal_watchdog_clearInt(  );
}

/* *  Timer Interrupt Handler */
void timer0_ISR( unsigned long whichTimer )
{
    
    pwmcnt = 0x80;
    
    /*if(pwmcnt==255)
        pwmcnt = 0x01;
    else
        pwmcnt = pwmcnt+1;
    */
    	
    /*
    printf( "keyctrl = 0x%x \n" ,keyctrl);
    printf( "keystat = 0x%x \n" ,keystat);
    printf( "mseqrst = 0x%x \n" ,mseqrst);
    printf( "pwmcnt = 0x%x \n" ,pwmcnt);*/
    a7hal_timer_clearInt( whichTimer );
}

/* *  Timer1 Interrupt Handler */
void timer1_ISR( unsigned long whichTimer )
{
    a7hal_timer_clearInt( A7HAL_ICU_TIMER1 );
}

/* *  IRQ1 Interrupt Handler */
void irq0_ISR(  )
{
    //a7hal_led_write( a7hal_led_read(  ) + 1 );
    a7hal_timer_clearInt( A7HAL_ICU_CSL0 );
}

/* *  IRQ1 Interrupt Handler */
void irq1_ISR(  )
{
    //a7hal_led_write( a7hal_led_read(  ) + 1 );
    a7hal_timer_clearInt( A7HAL_ICU_CSL1 );
    printf( "keystat = 0x%x\n",keystat);
}

/* *  IRQ2 Interrupt Handler */
void irq2_ISR(  )
{
    a7hal_icu_intDisable( A7HAL_ICU_CSL2 );
    //a7hal_icu_intEnable( A7HAL_ICU_TIMER1 );
    //a7hal_timer_start( 0x50, 1, A7HAL_DIV_256 | A7HAL_PERIODIC );
}

/* *  UART0 Receive Interrupt Handler */
void uart0_ISR( unsigned long whichTimer )
{
    //a7hal_icu_clearInt( A7HAL_ICU_SERIAL0 );
    char ch;
    //a7hal_uart_setRxInt (0,  OFF); 
    ch = a7hal_uart_getChar (0);
    //a7hal_uart_putChar (0, ch);
    a7hal_timer_clearInt( A7HAL_ICU_SERIAL0 );
    printf( "received\n");
}

/* *  UART0 Receive Interrupt Handler */
void uart1_ISR( unsigned long whichTimer )
{
    //a7hal_icu_clearInt( A7HAL_ICU_SERIAL1 );
    char ch;    
    ch = a7hal_uart_getChar (1);
    //a7hal_uart_putChar (1, ch);
    printf( "%c",ch);
}

int main(  )
{	
    long lcdtmp;
    long i;
    unsigned char *imagedata;
    unsigned char data1,data2,data3,data4;
    char *src;
    

    /* Enable the uart1 interrupt  */
    a7hal_uart_init ();
    //a7hal_uart_setBaud (0, 9600);
    //a7hal_uart_setBaud (1, 9600);
    a7hal_uart_setFIFO (1, A7HAL_FIFO_1_BYTE );
    a7hal_uart_setRxInt (1,  ON); 
    a7hal_icu_intConnect( uart1_ISR, A7HAL_ICU_SERIAL1 , 0 );
    a7hal_icu_intEnable( A7HAL_ICU_SERIAL1 );
    printf( "\n\rHello Chen Li Feng !\n" );
    printf( "Uart Init Finished .\n" );

    //for(i=0;     i<600 ; i++){	LCDDataBuf[i] = 0xffffffff; }//white
    for(i=0; i<9600; i++){	LCDDataBuf[i] = 0x00000000; }//black
    for(i=9600;  i<19200; i++){	LCDDataBuf[i] = 0xf800f800; }//blue
    for(i=19200; i<28800; i++){	LCDDataBuf[i] = 0x07e007e0; }//green
    for(i=28800; i<38400; i++){	LCDDataBuf[i] = 0x001f001f; }//red
    
///changes for dubblebuffer///
    for(i=0;     i<38400; i++){	LCDDataBuf1[i] = image[i]; }//image
	pLCDDataBuf = &(LCDDataBuf[0]);
	bLCDDataChange = 0;
///changes for dubblebuffer///

    /* Enable the irq1 interrupt  */
    a7hal_icu_intConnect( irq0_ISR, A7HAL_ICU_CSL0, 0 );
    a7hal_icu_intEnable( A7HAL_ICU_CSL0 );
    printf( "Irq0 Init Finished .\n" ); 
    
    /* Enable the irq1 interrupt  */
    a7hal_icu_intConnect( irq1_ISR, A7HAL_ICU_CSL1, 0 );
    a7hal_icu_intEnable( A7HAL_ICU_CSL1 );
    printf( "Irq1 Init Finished .\n" ); 
    
    /* Enable the irq2 interrupt  */
    a7hal_icu_intConnect( irq2_ISR, A7HAL_ICU_CSL2, 0 );
    a7hal_icu_intEnable( A7HAL_ICU_CSL2 );
    printf( "Irq2 Init Finished .\n" );
    
    /* Connect an ISR for the FIQ */
    a7hal_icu_intSteer( A7HAL_INT_LVL_TIMER0 );
    a7hal_icu_intConnect( timer0_ISR, A7HAL_INT_LVL_FIQ, 0 );
    /* Enable the timer interrupt and the FIQ */
    a7hal_icu_intEnable( A7HAL_INT_LVL_TIMER0 );
    a7hal_icu_intEnable( A7HAL_INT_LVL_FIQ );
    /* Start the timer */
    a7hal_timer_start( 0x8000, 0, A7HAL_DIV_256 | A7HAL_PERIODIC );
    a7hal_timer_stop( 0 );

    /* Enable the timer1 interrupt  */
    a7hal_icu_intConnect( timer1_ISR, A7HAL_ICU_TIMER1, 0 );
    //a7hal_icu_intEnable( A7HAL_ICU_TIMER1 );
    printf( "Timer Init Finished .\n" );    
       
    /*LCD init*/
    lcden = 0;
    lcden = 1;
    lcdrst = 1;
    
    /*LCD DMA init*/
    initDMA( DMA_CHANNEL_LCD );
    initDescriptors(  );
    StartDisplayDMA(  );
    
/*
    DMA1_CONTRL_REG = 0x02803;	//0010 1000 0010 0011
    DMA_SEL_REG_LCD = 0x33333333;
    DMA1_CONTRL_REG = 0x02802;	//0010 1000 0010 0010
    DMA1_IN_ENABLE_REG = 0x00;
    DMA1_SRC_ADR_REG = ( unsigned long )(&LCDDataBuf[2]);	// set transfer source address
    DMA1_TRS_CNT_REG = 0xfff8;	//set the number of bytes to transfer minus one
    DMA1_CONTRL_REG |= 0x004;	//initialize a tansfer
    printf( "LCD DMA Init Finished .\n" );
*/    
    /*Init Finished*/    
    pwmcnt = 0x80;
    mseqrst = 0xff;
    src = ( char * ) malloc( 128 );
    mseqrst = 0x00;
    
    printf( "Turn on back light.\n" );
    
    printf( " TFT lcd witn DMA start working ...\n" );
    lcdrst = 0;

    keyctrl = 0;
    
    for ( ;; )
    {    	
	    printf( " Press any key to continue ...\n" );
	    gets( src );
///changes for dubblebuffer///
		if(	bLCDDataChange == 1)
		{
			bLCDDataChange = 0;
			pLCDDataBuf = &(LCDDataBuf1[0]);
		}
		else
		{
			bLCDDataChange = 1;
			pLCDDataBuf = &(LCDDataBufl[0]);
		}
///changes for dubblebuffer///
    }    
    
    for ( ;; )
    {
	//DMAx_CUR_TRANS_CNT_REG -- specify the number remaining to transfer
	//DMAx_CUR_DEST_ADDR_REG -- current trasfer destination address	
	//wait until the previous transfer have started.
	//DMAx INIT Bit is auto cleared by hard ware
/*	while( (DMA1_CONTRL_REG & 0x04) != 0 ) ;
 	DMA1_SRC_ADR_REG = (( unsigned long )(&LCDDataBuf[0x4000]));
 	DMA1_TRS_CNT_REG = 0xffff;
 	DMA1_CONTRL_REG |= 0x004;	//initialize a tansfer
 	
	while( (DMA1_CONTRL_REG & 0x04) != 0 ) ;
 	DMA1_SRC_ADR_REG = (( unsigned long )(&LCDDataBuf[0x8000]));
 	DMA1_TRS_CNT_REG = 0x57ff;
 	DMA1_CONTRL_REG |= 0x004;	//initialize a tansfer
 	
    while( (DMA1_CONTRL_REG & 0x04) != 0 ) ;
	DMA1_SRC_ADR_REG = ( unsigned long )(&LCDDataBuf[0]);
 	DMA1_TRS_CNT_REG = 0xffff;
 	DMA1_CONTRL_REG |= 0x004;	//initialize a tansfer
*/
	//DMA_SEL_REG_LCD = 0x22222222;	//close DMA	
    }    
}

void Delay(int period)
{
	int i,j;
	long value;
	for(i=0;i<period;i++)
	{
		for(j=0;j<period;j++)
		{
			value = i*j;
		}
	}
}

void initDescriptors( void )
{//0x25800 LENGTH IN BYTE
    //memset( &descriptors[0], 0, sizeof( descriptors ) );

///changes for dubblebuffer///
    
    printf( "descriptors address = 0x%x \n", (&descriptors[0]));
    //Start a transfer using the next descriptor in the descriptor table.
    descriptors[0].control = A7HAL_DMA_NEW;
    descriptors[0].addr = ( unsigned long )(&pLCDDataBuf[0x000]);//0x00000
    descriptors[0].count = 0xffff;
    descriptors[0].control &= ~A7HAL_DMA_INTERRUPT;
    descriptors[0].control |= A7HAL_DMA_BUFFER_FULL;
    descriptors[0].control &= ~A7HAL_DMA_CONTINUOUS;
    
    //Start a transfer using the next descriptor in the descriptor table.
    descriptors[1].control = A7HAL_DMA_NEW;
    descriptors[1].addr = (( unsigned long )(&pLCDDataBuf[0x4000]));//0x10000
    descriptors[1].count = 0xffff;
    descriptors[1].control &= ~A7HAL_DMA_INTERRUPT;
    descriptors[1].control |= A7HAL_DMA_BUFFER_FULL;
    descriptors[1].control &= ~A7HAL_DMA_CONTINUOUS;

    //Start a transfer using the first descriptor in the descriptor table.
   // descriptors[2].control = A7HAL_DMA_START;
    descriptors[2].addr = (( unsigned long )(&pLCDDataBuf[0x8000]));//0x20000
    descriptors[2].count = 0x57ff;
    descriptors[2].control |= A7HAL_DMA_INTERRUPT;
    //descriptors[2].control &= ~A7HAL_DMA_INTERRUPT;
    descriptors[2].control |= A7HAL_DMA_BUFFER_FULL;
    //descriptors[2].control |=   A7HAL_DMA_RESTART;
    //Automatically continue to the next descriptor in the descriptor table 
    descriptors[2].control &= ~A7HAL_DMA_CONTINUOUS;
///changes for dubblebuffer///
}

void initDMA( int channel )
{
    /* Set up the DMA for a transfer to the PWM */
    DMA_SEL_REG_LCD = DMA1_CONTRL_EN;

    a7hal_dma_setProperty( A7HAL_DMA_ALL_BITS, 0, channel );
			   
    a7hal_dma_setProperty( 
    			   A7HAL_DMA_METHOD_BIT		//
    			 | A7HAL_DMA_DIRECTION_BIT	//
    			 | A7HAL_DMA_SIZE_BIT		//
    			 | A7HAL_DMA_SRC_MODE_BIT 
    			 | A7HAL_DMA_DST_MODE_BIT
    			 | A7HAL_DMA_BUFF_STAT_FREEZE_BIT ,
    			 
			   A7HAL_DMA_METHOD_DESCRIPTOR
			 | A7HAL_DMA_MEM_TO_DEV
			 | A7HAL_DMA_SIZE_WORD
			 | A7HAL_DMA_SRC_INC_DST_NONE
			 | A7HAL_DMA_BUFF_STAT_FREEZE,
			 
			   channel );

    //A7HAL_INT_DESC  Descriptor interrupt. 
    a7hal_dma_intEnable( DMA_CHANNEL_LCD, A7HAL_INT_DESC, A7HAL_INT_DESC );

    /* Setup and enable the DMA interrupt */
    a7hal_icu_intConnect( DMA1TransferDone, DMA_IRQ_LCD, DMA_CHANNEL_LCD );
    
    a7hal_icu_intEnable( DMA_IRQ_LCD );//DMA1_IN_ENABLE_REG = 0x00;
      
    //DMA1_CONTRL_REG |= A7HAL_DMA_BROADCAST_ENABLE;
    //printf( "LCD DMA Init Finished .\n" );
}

void StartDisplayDMA( void )
{
    printf( "\n Start LCD Data transfer\n" );

    a7hal_dma_abort( DMA_CHANNEL_LCD );
    a7hal_dma_setDescriptorAddress( DMA_CHANNEL_LCD, ( void * ) &descriptors[0] );
    a7hal_dma_enable( DMA_CHANNEL_LCD );    
    a7hal_dma_start( DMA_CHANNEL_LCD );//DMA1_CONTRL_REG |= 0x004;	//initialize dma
    //a7hal_dma_broadcast( DMA_CHANNEL_LCD );
}

void DMA1TransferDone( unsigned long channel )
{
    a7hal_dma_clearInt( channel, a7hal_dma_getIntStatus( channel ) );

///changes for dubblebuffer///
    descriptors[0].addr = ( unsigned long )(&pLCDDataBuf[0x000]);//0x00000
    descriptors[1].addr = ( unsigned long )(&pLCDDataBuf[0x4000]);//0x00000
    descriptors[2].addr = ( unsigned long )(&pLCDDataBuf[0x8000]);//0x00000
///changes for dubblebuffer///

    descriptors[0].control |= A7HAL_DMA_BUFFER_FULL;
    descriptors[1].control |= A7HAL_DMA_BUFFER_FULL;
    descriptors[2].control |= A7HAL_DMA_BUFFER_FULL;
    a7hal_dma_start( DMA_CHANNEL_LCD );//DMA1_CONTRL_REG |= 0x004;	//initialize dma
    //printf( "LCD DMA trasfer Finished .\n" );
}