LPC2132 fiq setup branches to prefetch_abort_irq

rons — Sun, 27 Nov 2016 20:57:09 GMT

Issue with LPC2132FBD64: unable to get fiq to work.

My main program calls TIMER1_Init() and I get kicked into the prefetch_abort_irq().

I have also tried the vectored irq method (not shown but the changes are minimal) and I get kicked into the software_irq().

If the timer is not enabled to interrupt on match the processor (T1MCR_MR0I) the while loop displays the timer counter register. I know it is counting correctly.

I have worked with the lpc2148 and lpc1768 with no problems. I was wondering if the notations in the manual about the LPC2132/01 being a upgrade to the LPC2132 would matter. It looks like the date code on my LPC2132 is "07".

-------------------------------------------------------------------------------------

_start:
b reset /* reset */
b undef_instruction_irq /* undefined instruction */
b software_irq /* software interrupt */
b prefetch_abort_irq /* prefetch abort */
b data_abort_irq /* data abort */
nop /* reserved for the bootloader checksum */
ldr pc, [pc, #-0x0ff0] /* IRQ */
b fiq_irq /* FIQ */

-------------------------------------------------------------------------------------

#define T1IR_MR0_INTERRUPT 0x01

void fiq_irq(void)
{
timer1_ticks++;
T1IR = T1IR_MR0_INTERRUPT;
}

-------------------------------------------------------------------------------------

void software_irq(void)
{
LED_Blink(0x02);
}

-------------------------------------------------------------------------------------

void prefetch_abort_irq(void)
{
LED_Blink(0x03);
}

-------------------------------------------------------------------------------------

#define MEMMAP_MAP_INT_VECTORS_IN_FLASH 0x01

void MEMMAP_Init(void)
{
MEMMAP = MEMMAP_MAP_INT_VECTORS_IN_FLASH;
}

-------------------------------------------------------------------------------------

#define SCS_GPIO0M_HIGH_SPEED 0x00000001
#define SCS_GPIO1M_HIGH_SPEED 0x00000002

void GPIO_Init(void)
{
/* Enable high speed GPIO on port 0 & 1 */
SCS = SCS_GPIO1M_HIGH_SPEED | SCS_GPIO0M_HIGH_SPEED;
}

-------------------------------------------------------------------------------------

void LED_Write(uint8_t num)
{
FIO0PIN0 = ~num;
}

void LED_Blink(uint8_t num)
{
     while(1)
     {
         LED_Write(num);
         delay(250);
         LED_Write(0);
         delay(250);
     }
}

void LED_Init(void)
{
FIO0DIR0 = 0xFF;
FIO0SET0 = 0xFF;
}

-------------------------------------------------------------------------------------

#define REG8(x)     (*((volatile uint8_t*) (x)))
#define REG16(x)   (*((volatile uint16_t*) (x)))
#define REG32(x)   (*((volatile uint32_t*) (x)))

#define PCONP_PCTIM1 0x00000004

#define CCLK 60000000

#define TIMER1_RATE 100

#define T1CTCR_MODE_TIMER 0x00

#define T1MCR_MR0I 0x0001
#define T1MCR_MR0R 0x0002

#define VICIntSelect_TIMER1 0x00000020

#define T1TCR_COUNTER_ENABLE 0x01

#define T1TC REG32(0xE0008008)

#define T1PR     REG32(0xE000800C)
#define T1PC     REG32(0xE0008010)
#define T1MCR REG16(0xE0008014)
#define T1MR0   REG32(0xE0008018)

#define T1CTCR REG8(0xE0008070)

#define VICIntSelect REG32(0xFFFFF00C)

void TIMER1_Init(void)
{
/* Turn on power to timer */
PCONP |= PCONP_PCTIM1;

    /* Clear counters */
     T1PR = 0;
     T1PC = 0;
     T1MR0 = CCLK / TIMER1_RATE;
     T1CTCR = T1CTCR_MODE_TIMER; /* timer mode */
     T1MCR = T1MCR_MR0I | T1MCR_MR0R; /* interrupt on match */
     VICIntSelect |= VICIntSelect_TIMER1; /* FIRQ category */
     T1TCR = T1TCR_COUNTER_ENABLE; /* enable for counting */
}

-------------------------------------------------------------------------------------

int main(void)
{

uint8_t count;

    MEMMAP_Init();
    GPIO_Init();
    LED_Init();
    TIMER1_Init();

while (1)
{

        for (count = 0; count < 0x100; count++)
        {
         LED_Write(T1TC);
         delay(100);

}

}
}

Re: LPC2132 fiq setup branches to prefetch_abort_irq

rons — Fri, 09 Dec 2016 18:49:24 GMT

Got it solved. Modified Makefile so that fiq_irq is not compiled with "-mthumb -mthumb-interwork".

Re: LPC2132 fiq setup branches to prefetch_abort_irq

CarlosCasillas — Wed, 14 Dec 2016 21:41:57 GMT

Hi Sudjian,

Thanks for sharing your solution with the Community!

Best regards!

/Carlos

topic Re: LPC2132 fiq setup branches to prefetch_abort_irq in LPC Microcontrollers

LPC2132 fiq setup branches to prefetch_abort_irq

Re: LPC2132 fiq setup branches to prefetch_abort_irq

Re: LPC2132 fiq setup branches to prefetch_abort_irq