irq.h

i2s usb audio demo lpc2138

/******************************************************************************
 *   irq.h:  Interrupt related Header file for NXP LPC230x Family 
 *   Microprocessors
 *
 *   Copyright(C) 2006, NXP Semiconductor
 *   All rights reserved.
 *
 *   History
 *   2006.09.01  ver 1.00    Prelimnary version, first Release
 *
******************************************************************************/
#ifndef __IRQ_H 
#define __IRQ_H

#define I_Bit			0x80
#define F_Bit			0x40

#define SYS32Mode		0x1F
#define IRQ32Mode		0x12
#define FIQ32Mode		0x11

#define HIGHEST_PRIORITY	0x01
#define LOWEST_PRIORITY		0x0F

#define SET_VIC_PRIORITY_0	0x00	/* highest priority is 0 */
#define SET_VIC_PRIORITY_1	0x01
#define SET_VIC_PRIORITY_2	0x02
#define SET_VIC_PRIORITY_3	0x03
#define SET_VIC_PRIORITY_4	0x04
#define SET_VIC_PRIORITY_5	0x05
#define SET_VIC_PRIORITY_6	0x06
#define SET_VIC_PRIORITY_7	0x07
#define SET_VIC_PRIORITY_8	0x08
#define SET_VIC_PRIORITY_9	0x09
#define SET_VIC_PRIORITY_10	0x0A
#define SET_VIC_PRIORITY_11	0x0B
#define SET_VIC_PRIORITY_12	0x0C
#define SET_VIC_PRIORITY_13	0x0D
#define SET_VIC_PRIORITY_14	0x0E
#define SET_VIC_PRIORITY_15	0x0F	 /* lowest priority is 0x0F */

#define	WDT_INT			0
#define SWI_INT			1
#define ARM_CORE0_INT		2
#define	ARM_CORE1_INT		3
#define	TIMER0_INT		4
#define TIMER1_INT		5
#define UART0_INT		6
#define	UART1_INT		7
#define	PWM0_1_INT		8
#define I2C0_INT		9
#define SPI0_INT		10			/* SPI and SSP0 share VIC slot */
#define SSP0_INT		10
#define	SSP1_INT		11
#define	PLL_INT			12
#define RTC_INT			13
#define EINT0_INT		14
#define EINT1_INT		15
#define EINT2_INT		16
#define EINT3_INT		17
#define	ADC0_INT		18
#define I2C1_INT		19
#define BOD_INT			20
#define EMAC_INT		21
#define USB_INT			22
#define CAN_INT			23
#define MCI_INT			24
#define GPDMA_INT		25
#define TIMER2_INT		26
#define TIMER3_INT		27
#define UART2_INT		28
#define UART3_INT		29
#define I2C2_INT		30
#define I2S_INT			31

#define VIC_SIZE		32

#define VECT_ADDR_INDEX	0x100
#define VECT_CNTL_INDEX 0x200

/* Be aware that, from compiler to compiler, nested interrupt will have to
be handled differently. More details can be found in Philips LPC2000
family app-note AN10381 */
 
/* unlike Keil CARM Compiler, in ARM's RealView compiler, don't save and 
restore registers into the stack in RVD as the compiler does that for you. 
See RVD ARM compiler Inline and embedded assemblers, "Rules for 
using __asm and asm keywords. */
static DWORD sysreg;		/* used as LR register */
#define IENABLE __asm { MRS sysreg, SPSR; MSR CPSR_c, #SYS32Mode }
#define IDISABLE __asm { MSR CPSR_c, #(IRQ32Mode|I_Bit); MSR SPSR_cxsf, sysreg }

extern void init_VIC( void );
extern DWORD install_irq( DWORD IntNumber, void *HandlerAddr, DWORD Priority );
extern void enable_VIC_irq(DWORD IntNumber);
extern void disable_VIC_irq(DWORD IntNumber);

#endif /* end __IRQ_H */

/******************************************************************************
**                            End Of File
******************************************************************************/