timers.c

ADSP-BF537Display部分的代码

/*=============================================================================
=
= Name:     QVGA Display and Timer Verification and Example Code
=
===============================================================================
=
= (C) Copyright 2006 - Analog Devices, Inc.  All rights reserved.
=
= File Name :   timers.c
=
= Date      :   12/21/06
=
= Target    :   ADSP-BF537
=
= Version   :   1.0
=
= Purpose   :   Test the display with a bitmap
=
=
=
==============================================================================*/

#include <services/services.h>
#include <services/tmr/adi_tmr.h>
#include "debug.h"
#include "timers.h"

#define DCLKS_PER_FRAME		(FREQ_PPI_CLK/FRAMES_PER_SEC)   // 6*1000*1000/60=100000
#define DCLKS_PER_LINE		(DCLKS_PER_FRAME/(320+START_LINES+U_LINES)) // 303/329=

// LCD Timers
#define BF537_EZKIT_TMR_LP_LCD		ADI_TMR_GP_TIMER_6
#define BF537_EZKIT_TMR_SPS_LCD		ADI_TMR_GP_TIMER_1
#define BF537_EZKIT_TMR_PS_LCD		ADI_TMR_GP_TIMER_7
#define BF537_EZKIT_TMR_REV_LCD		ADI_TMR_GP_TIMER_5
#define BF537_EZKIT_TMR_SP_LCD		ADI_TMR_GP_TIMER_0
#define BF537_EZKIT_NUM_TIMERS_FOR_LCD			5

#define BF537_EZKIT_TMR_HSYNC		BF537_EZKIT_TMR_SP_LCD
#define BF537_EZKIT_TMR_VSYNC		BF537_EZKIT_TMR_SPS_LCD

// Macro for readibility
#define CHECK(X)	ret = X;										\
					if (ret != ADI_TMR_RESULT_SUCCESS)				\
						BF537_EZKIT_Throw ("adi_tmr_GPControl error\n");
						
						
void InitTimers (void)
{
	// Initialize the timer services
	int ret = adi_tmr_Init (NULL);
	if (ret != 0) 
		BF537_EZKIT_Throw ("adi_tmr_Init error\n");
	ret = adi_ports_Init (NULL);
	if (ret != 0) 
		BF537_EZKIT_Throw ("adi_ports_Init error\n");
}

		
void OpenTimersForLCD (void)
{
/*    int ret;
 *   
 *	static ADI_TMR_GP_CMD_VALUE_PAIR GPTableTimerCommonCommands[] =
 *	{ 
 *		{ ADI_TMR_GP_CMD_SET_TIMER_MODE,			(void*) PWM_OUT			},
 *		{ ADI_TMR_GP_CMD_SET_COUNT_METHOD,			(void*) TRUE			},	// Count to end of period. Required by PWM_OUT
 *		{ ADI_TMR_GP_CMD_SET_INTERRUPT_ENABLE,		(void*) FALSE			},	// No timer interrupts
 *		{ ADI_TMR_GP_CMD_SET_INPUT_SELECT,			(void*) TRUE			},	// UART_RX or PPI_CLK (PPI_CLK)
 *		{ ADI_TMR_GP_CMD_SET_OUTPUT_PAD_DISABLE,	(void*) FALSE			},	// Enable the pin of TimerID
 *		{ ADI_TMR_GP_CMD_SET_CLOCK_SELECT,			(void*) TRUE			},	// Use PWM clock (PPI_CLK)
 *		{ ADI_TMR_GP_CMD_SET_TOGGLE_HI,				(void*) FALSE			},	// Do not toggle active high
 *		{ ADI_TMR_GP_CMD_RUN_DURING_EMULATION,		(void*) FALSE			},	// Keep running during emulator interrupts
 *		{ ADI_TMR_GP_CMD_END, NULL }
 *	};
 *	
 *	// Open and set the configuration values for each timer
 *	// Only for coherence with the device drivers model. See StartTimersForLCD for actual initialization
 *	adi_tmr_Open (BF537_EZKIT_TMR_VSYNC);		// SPS timer 1
 *	CHECK( adi_tmr_GPControl (BF537_EZKIT_TMR_VSYNC, ADI_TMR_GP_CMD_TABLE, GPTableTimerCommonCommands) );
 *	CHECK( adi_tmr_GPControl (BF537_EZKIT_TMR_VSYNC, ADI_TMR_GP_CMD_SET_PULSE_HI, (void*) TRUE) );
 *	CHECK( adi_tmr_GPControl (BF537_EZKIT_TMR_VSYNC, ADI_TMR_GP_CMD_SET_PERIOD, (void*) (DCLKS_PER_LINE*(320+START_LINES+U_LINES))) );		// 1 frame
 *	CHECK( adi_tmr_GPControl (BF537_EZKIT_TMR_VSYNC, ADI_TMR_GP_CMD_SET_WIDTH, (void*) (27)) );								// 1 frame - (7 lines - 4 PPI_CLK + 1 PPI_CLK)
 *
 *	adi_tmr_Open (BF537_EZKIT_TMR_PS_LCD);		// PS & CLS timer 7
 *	CHECK( adi_tmr_GPControl (BF537_EZKIT_TMR_PS_LCD, ADI_TMR_GP_CMD_TABLE, GPTableTimerCommonCommands) );
 *	CHECK( adi_tmr_GPControl (BF537_EZKIT_TMR_PS_LCD, ADI_TMR_GP_CMD_SET_PULSE_HI, (void*) TRUE) );
 *	CHECK( adi_tmr_GPControl (BF537_EZKIT_TMR_PS_LCD, ADI_TMR_GP_CMD_SET_PERIOD, (void*) (DCLKS_PER_LINE)) );					// 1 line
 *	CHECK( adi_tmr_GPControl (BF537_EZKIT_TMR_PS_LCD, ADI_TMR_GP_CMD_SET_WIDTH, (void*) (25)) );								// 1 line - ((21+PPI_X) + 4)	
 *
 *	adi_tmr_Open (BF537_EZKIT_TMR_REV_LCD);	// REV timer 5
 *	CHECK( adi_tmr_GPControl (BF537_EZKIT_TMR_REV_LCD, ADI_TMR_GP_CMD_TABLE, GPTableTimerCommonCommands) );
 *	CHECK( adi_tmr_GPControl (BF537_EZKIT_TMR_REV_LCD, ADI_TMR_GP_CMD_SET_PULSE_HI, (void*) TRUE) );
 *	CHECK( adi_tmr_GPControl (BF537_EZKIT_TMR_REV_LCD, ADI_TMR_GP_CMD_SET_PERIOD, (void*) (DCLKS_PER_LINE*2)) );				// 2 lines
 *	CHECK( adi_tmr_GPControl (BF537_EZKIT_TMR_REV_LCD, ADI_TMR_GP_CMD_SET_WIDTH, (void*) (DCLKS_PER_LINE)) );					// 1 line
 *
 *	adi_tmr_Open (BF537_EZKIT_TMR_LP_LCD);		// LP timer 6
 *	CHECK( adi_tmr_GPControl (BF537_EZKIT_TMR_LP_LCD, ADI_TMR_GP_CMD_TABLE, GPTableTimerCommonCommands) );
 *	CHECK( adi_tmr_GPControl (BF537_EZKIT_TMR_LP_LCD, ADI_TMR_GP_CMD_SET_PULSE_HI, (void*) TRUE) );
 *	CHECK( adi_tmr_GPControl (BF537_EZKIT_TMR_LP_LCD, ADI_TMR_GP_CMD_SET_PERIOD, (void*) (DCLKS_PER_LINE)) );					// 1 line
 *	CHECK( adi_tmr_GPControl (BF537_EZKIT_TMR_LP_LCD, ADI_TMR_GP_CMD_SET_WIDTH, (void*) (1)) );								// 1 PPI_CLK
 *		
 *	adi_tmr_Open (BF537_EZKIT_TMR_HSYNC);		// SP timer 0
 *	CHECK( adi_tmr_GPControl (BF537_EZKIT_TMR_HSYNC, ADI_TMR_GP_CMD_TABLE, GPTableTimerCommonCommands) );
 *	CHECK( adi_tmr_GPControl (BF537_EZKIT_TMR_HSYNC, ADI_TMR_GP_CMD_SET_PULSE_HI, (void*) TRUE) );
 *	CHECK( adi_tmr_GPControl (BF537_EZKIT_TMR_HSYNC, ADI_TMR_GP_CMD_SET_PERIOD, (void*) (DCLKS_PER_LINE)) );					// 1 line
 *	CHECK( adi_tmr_GPControl (BF537_EZKIT_TMR_HSYNC, ADI_TMR_GP_CMD_SET_WIDTH, (void*) (1)) );									// 1 line - 1 PPI_CLK
 */
}

	
void StartTimersForLCD (void)
{
    u32 timer_ports_config[BF537_EZKIT_NUM_TIMERS_FOR_LCD] = { ADI_PORTS_DIR_TMR_6, ADI_PORTS_DIR_TMR_1, ADI_PORTS_DIR_TMR_7, ADI_PORTS_DIR_TMR_5, ADI_PORTS_DIR_TMR_0 };
    int ret;
    
	adi_ports_EnableTimer (timer_ports_config, BF537_EZKIT_NUM_TIMERS_FOR_LCD, TRUE);
	
    *pTIMER1_CONFIG = PWM_OUT | PERIOD_CNT | TIN_SEL | CLK_SEL | PULSE_HI | EMU_RUN;
    *pTIMER1_PERIOD = DCLKS_PER_LINE*(320+START_LINES+U_LINES);
    *pTIMER1_WIDTH = 27+100;
      
    *pTIMER7_CONFIG = PWM_OUT | PERIOD_CNT | TIN_SEL | CLK_SEL | PULSE_HI | EMU_RUN;
    *pTIMER7_PERIOD = DCLKS_PER_LINE;
    *pTIMER7_WIDTH = 25+100;
      	
    *pTIMER5_CONFIG = PWM_OUT | PERIOD_CNT | TIN_SEL | CLK_SEL | PULSE_HI | EMU_RUN;
    *pTIMER5_PERIOD = DCLKS_PER_LINE*2;
    *pTIMER5_WIDTH = DCLKS_PER_LINE;
    
    *pTIMER6_CONFIG = PWM_OUT | PERIOD_CNT | TIN_SEL | CLK_SEL | PULSE_HI | EMU_RUN;
    *pTIMER6_PERIOD = DCLKS_PER_LINE;
    *pTIMER6_WIDTH = 1;
      
    *pTIMER0_CONFIG = PWM_OUT | PERIOD_CNT | TIN_SEL | CLK_SEL | PULSE_HI | EMU_RUN;
    *pTIMER0_PERIOD = DCLKS_PER_LINE;
    *pTIMER0_WIDTH = 1;
    
    // Enable HSYNC and VSYNC timers for the LCD
    CHECK( adi_tmr_GPGroupEnable (BF537_EZKIT_TMR_VSYNC, TRUE) );    
    // Precisely delay the start of the other timers
	while (*pTIMER1_COUNTER < 1);
	*pTIMER_ENABLE = TIMEN7;
	while (*pTIMER1_COUNTER < 9+100);
	*pTIMER_ENABLE = TIMEN5;
	while (*pTIMER1_COUNTER < 24+100);
	*pTIMER_ENABLE = TIMEN6;
	while (*pTIMER1_COUNTER < 26+100);
	*pTIMER_ENABLE = TIMEN0;
}


void CloseTimers (void)
{
    int ret;
    
	// Terminate all the timers
	ret = adi_tmr_Terminate ();
	ret = adi_ports_Terminate ();
}