RE: NRF51 simple vector deflection function?

Hung Bui — Tue, 02 May 2017 13:34:29 GMT

Hi Xiao,

You meant you couldn't enter SPI interrupt when in the bootloader or when in the application ? You set Bootloader_active = 1 when you are in bootloader and set it to 0 when you exit the bootloader before you jump to your application.

You can simply add a break point inside BranchIntHandler() and check what happens there when you receive a SPI interrupt.

RE: NRF51 simple vector deflection function?

xiao — Tue, 02 May 2017 09:56:02 GMT

hi , The last time that the example does not work, do you have a simple way to achieve? My entire circuit framework is as follows.

2、I use the SPI interface, but has been unable to enter the SPI interrupt. My application starts with 0x0000C000. Bootloader_active = 1 at the beginning of the program; can you help me to see why?

__asm void BranchIntHandler(void) {
            MRS    R0, PSR ;
            /* Mask the interrupt number only */
            MOVS   R1, #0x3F  ; 
            ANDS   R0, R1     ; /*R0 keeps the interrupt number*/
            extern bootloader_active;
            LDR R1 , =bootloader_active;
            LDR R2, [R1];
            CMP R2,#1;
            BEQ bootload;
            LDR     R2, =0x0000C000;
            /* Irq address position = IRQ No * 4 */
            LSLS   R0, R0, #2 ;
            /* Fetch the user vector offset */
            LDR    R0, [R0, R2];
            /* Jump to user interrupt vector */
            BX     R0  ;
            
bootload 
            CMP R0, #0x24;
            BEQ swi0
            CMP R0, #0x21;
            BEQ rtc1
            CMP R0, #0x16;
            BEQ gpiote
            CMP R0, #0x12;
            BEQ uart0
						CMP R0, #0x14;
            BEQ spi1
            //RETURN code needed
swi0            
            EXTERN SWI0_IRQHandler_Bootloader[WEAK]
            LDR    R0,=SWI0_IRQHandler_Bootloader
            B execute ;    
            
rtc1            
            EXTERN  RTC1_IRQHandler_Bootloader[WEAK] 
            LDR    R0,=RTC1_IRQHandler_Bootloader
            B execute ;
						
spi1            
            EXTERN  SPI1_TWI1_IRQHandler_Bootloader[WEAK] 
            LDR    R0,=SPI1_TWI1_IRQHandler_Bootloader
            B execute ;
            
uart0
            EXTERN  UART0_IRQHandler_Bootloader[WEAK]     
            LDR    R0,=UART0_IRQHandler_Bootloader
            B execute ;            
gpiote            
            EXTERN  GPIOTE_IRQHandler_Bootloader[WEAK]     
            LDR    R0,=GPIOTE_IRQHandler_Bootloader
                                 
execute            
            BX     R0  ;
            
}

RE: NRF51 simple vector deflection function?

Hung Bui — Mon, 24 Apr 2017 14:18:42 GMT

@Xiao: We have an example and some explanation here.