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Generating a 1ms heartbeat timer on XMC4500.

Hi all. Just as the title says, I am trying to generate a 1ms heartbeat timer on my XMC4500 hexagon board, but I am running into an error which you can see here: http://imgur.com/o5TGwms .

You can see there at the bottom in Build Output that I am getting the L6200E Error. Now, the reason it says .\Flash\Blinky.axf in front of the error is because I simply opened up the example Blinky project and deleted the contents of Source Files folder and replaced it with the sysTick.c code.

Any help is much appreciated.

Parents

0 Zoran M over 10 years ago in reply to ImPer Westermark

Per, so essentially what I have to do is:

1.) Set pin 3.7 to output in 'push pull' mode
2.) Set pad driver for pin 3.7 to 'strong'

So here is what I have now (builds with no errors/warnings):


#include "stdio.h"
#include "XMC4500.h"                                                                                                  //SFR declarations of the selected device
#include "xmc_gpio.h"
#include "xmc4_gpio.h"

uint32_t msTicks = 0;                                                                                                                                           /* Variable to store millisecond ticks */

void SysTick_Handler(void) {                                                                                                                    /* SysTick interrupt Handler.*/
        msTicks++;                                                                                                                                                                                      /*See startup file startup_XMC4500.s for SysTick vector */

// Set GPIO to alternate between HIGH/LOW
        if (msTicks & 1)                                                                                                                                                            // 2ms period, 500 Hz on scope
                PORT3->OMR = 0x00000080UL;                                                                                                           // 7 & 1 is 1; 8 & 1 is 0 -- bitwise operation, so basically we are just looking at the least
        else                                                                                                                                                                                                            // significant count to determine whether it's odd or even. If odd, signal to pin goes HIGH,
                PORT3->OMR = 0x00800000UL;                                                                                                           // if even, signal to pin goes LOW. This completes our 2ms/500Hz cycle.

}
int main (void) {
        uint32_t returnCode;

        PORT3->IOCR0 = 0x80UL << 0;                                                                                                                    // P3.7 output, push pull
        PORT3->PDR0 = 0x02UL << 0;                                                                                                                     // P3.7 pad driver strong

        returnCode = SysTick_Config(SystemCoreClock / 1000);            /* Configure SysTick to generate an interrupt every millisecond */
        if (returnCode != 0) {                                                                                                                                  /* Check return code for errors */
                // Error Handling
        }
        while(1);
}

I am still not sure how to go about error handling, but what do you think about what I have regarding my configurations of the GPIO?

Reply

0 Zoran M over 10 years ago in reply to ImPer Westermark

Per, so essentially what I have to do is:

1.) Set pin 3.7 to output in 'push pull' mode
2.) Set pad driver for pin 3.7 to 'strong'

So here is what I have now (builds with no errors/warnings):


#include "stdio.h"
#include "XMC4500.h"                                                                                                  //SFR declarations of the selected device
#include "xmc_gpio.h"
#include "xmc4_gpio.h"

uint32_t msTicks = 0;                                                                                                                                           /* Variable to store millisecond ticks */

void SysTick_Handler(void) {                                                                                                                    /* SysTick interrupt Handler.*/
        msTicks++;                                                                                                                                                                                      /*See startup file startup_XMC4500.s for SysTick vector */

// Set GPIO to alternate between HIGH/LOW
        if (msTicks & 1)                                                                                                                                                            // 2ms period, 500 Hz on scope
                PORT3->OMR = 0x00000080UL;                                                                                                           // 7 & 1 is 1; 8 & 1 is 0 -- bitwise operation, so basically we are just looking at the least
        else                                                                                                                                                                                                            // significant count to determine whether it's odd or even. If odd, signal to pin goes HIGH,
                PORT3->OMR = 0x00800000UL;                                                                                                           // if even, signal to pin goes LOW. This completes our 2ms/500Hz cycle.

}
int main (void) {
        uint32_t returnCode;

        PORT3->IOCR0 = 0x80UL << 0;                                                                                                                    // P3.7 output, push pull
        PORT3->PDR0 = 0x02UL << 0;                                                                                                                     // P3.7 pad driver strong

        returnCode = SysTick_Config(SystemCoreClock / 1000);            /* Configure SysTick to generate an interrupt every millisecond */
        if (returnCode != 0) {                                                                                                                                  /* Check return code for errors */
                // Error Handling
        }
        while(1);
}

I am still not sure how to go about error handling, but what do you think about what I have regarding my configurations of the GPIO?

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