system.h

一个基于ARM平台的触摸屏程序。

//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////
// cpsr/spsr
#define Mode_USR		0x10
#define Mode_FIQ		0x11
#define Mode_IRQ		0x12
#define Mode_SVC		0x13
#define Mode_ABT		0x17
#define Mode_UNDEF		0x1B
#define Mode_SYS		0x1F		
#define I_Bit			0x80
#define F_Bit			0x40

//////////////////////////////////////////////////////////////////////////////
// General
#define CR			0x0D
#define LF			0x0A
//////////////////////////////////////////////////////////////////////////////
// memory map
#define	DRAM_CONTROL		0x200b0000

#define	BASE_SYSTEM		0x20000000
#define BASE_UserRAM		0x10000000
	//---------------------------------- total size
	#define LEN_UserRam		0x100fffff
	//---------------------------------- stack offset
	#define LEN_SvcStack		0x10020000
	#define LEN_AbtStack	   	0x10010000
	#define LEN_UndefStack		0x10002000
	#define LEN_IrqStack		0x10020000
	#define LEN_FiqStack		0x10020000
	#define LEN_UsrStack		0x10020000

//Interrupt map
#define INT_Status		0x0014
#define INT_Unmask		0x0018
	#define 		FLASH_BIT	0x00000800
	#define 		SDRAM_BIT	0x00000400
	#define 		GPIO_TIMER_BIT	0x00000200
	#define 		M3G_BIT		0x00000100
	#define 		UART_BIT	0x00000080
	#define 		USB_BIT		0x00000040
	#define 		DSP_BIT		0x00000020
	#define 		LCD_BIT		0x00000010
	#define 		GRAPHICS_BIT	0x00000006
	#define 		IMAGE_BIT	0x00000004
	#define 		JPEG_BIT	0x00000002
	#define 		RESERED_BIT	0x00000001
	
//GPIO AND TIMER
#define	BASE_GPIO_TIMER		0x20090000		

	#define 	GPIO_DIR	0x0000
	#define 	GPIO_INTE	0x0004				
	#define 	GPIO_INTP	0x0008
	#define 	GPIO_IN		0x000C
	#define		GPIO_OUT 	0x0010
	#define		TIM_1		0x0014
	#define		GPIO_EDGE	0x0108
	#define		TIM1_ENAMBLE   0x80000000 @enable time1
	#define		TIM1_INT       0x40000000 @time1 interrupt status
	#define		TIM_2	0x0018
	#define		TIM2_ENAMBLE   0x80000000 @enable time2
	#define		TIM2_INT       0x40000000 @time2 interrupt status
	
	
//UART register mapping
#define URT_SERIAL1_BASE	0x20060000
#define URT_SERIAL2_BASE	0x20061000
#define UART_BASE	URT_SERIAL1_BASE
#define URT_BASE	UART_BASE
#define UAT_BASE	URT_SERIAL1_BASE

/*/These register holds the data to be sent and data to be recived*/
#define URT_XMIT_DATA	0x00
#define URT_RECV_DATA	0x00

/*/These register holds the lower and upper of 16 bit baud rate divisor*/
#define URT_BAUD_LO	0x04
#define URT_BAUD_HI	0x08


/*/the value of BAUD_REG*/
//*
#define BAUD_RATE_38400_LO		0x61
#define BAUD_RATE_38400_HI		0x00

#define XMIT_FIFO_FULL  0x4
#define URT_STAT	0x0c
#define XMIT_BUSY_MASK	0x0001	/*/this bit high means data is being sent over UART*/
#define RECV_AVAIL_MASK	0x0100	/*/this bit high means data is being recv by UART*/

/*/this register holds the mode of int*/
#define URT_INT_MODE		0x10
#define XMIT_MODE_MASK		0x0F
#define RECV_MODE_MASK		0XF0

/*/this register enable the UART interrupt*/
#define URT_INT_ENA	0x14
#define XMIT_ENA_MASK	0x01
#define RECV_ENA_MASK	0x02	

#define		SERIAL1_BASE	0x20060000
#define		SERIAL_BASE	SERIAL1_BASE
#define		SERIAL2_BASE	0x20061000


//data to transmitted, write only
#define		XMIT_DAT_REG 		0x00
//data	to receive , read only
#define		REC_DAT_REG	  	0x00
//band_rate register
/*
	Baud_rate_divisor =                sys_clk
					---------------
					(16*2*baud_rate)
	BAUD_REG_LO = Baud_rate_divisor % 256
	BAUD_REG_HI = (Baud_rate_divisor - BAUD_REG_LO)/2
	
*/

#define		SYS_CLOCL		0x7a1200 //8M

#define		BAUD_REG_LO	  	0x04
#define		BAUD_REG_HI	  	0x08
	
	#define BAUD_RATE_2400_LO		0x68
	#define BAUD_RATE_2400_HI		0x00
	#define BAUD_RATE_19200_LO		0x0c
	#define BAUD_RATE_19200_HI		0x00

#define		STAT_REG	 	0x0c
	#define	XMIT_EMPT	0x01         //can not trasmit
	#define REV_AVAIL	0x02         //have not received
		
#define		INT_STAT_REG		0x10
	#define STAT_XMIT_EMPT	0x01
	#define	STAT_REV_AVAIL  0x02
		
#define		INT_ENB_REG		0x14
	#define EN_XMIT_EMPT	0x01
	#define	EN_REV_AVAIL  0x02


//////////////////////////////////////////////////////////////////////////////
// end