This discussion has been locked.

You can no longer post new replies to this discussion. If you have a question you can start a new discussion

nested interrupts

hi,
Am using LPC2366.From the keil sample software i took two macros IENABLE and IDISABLE and their definitions,used in ISR routine as in sample code.But my software hangs at PAbt_Addr DCD PAbt_Handler.what is the reason?

Parents

0 keshan g over 17 years ago in reply to keshan g

sorry for previous one

#define I_Bit                   0x80
#define F_Bit                   0x40
#define SYS32Mode               0x1F
#define IRQ32Mode               0x12
#define FIQ32Mode               0x11
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 }

this results in hanging

Reply

0 keshan g over 17 years ago in reply to keshan g

sorry for previous one

#define I_Bit                   0x80
#define F_Bit                   0x40
#define SYS32Mode               0x1F
#define IRQ32Mode               0x12
#define FIQ32Mode               0x11
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 }

this results in hanging

Children

No data