#include <stm32f1xx_ll_bus.h>
#include <stm32f1xx_ll_gpio.h>
#include <stm32f1xx_ll_utils.h>
#include <stdio.h>
#include <string.h>

char buffer[10];
char *bufferp;

int main(void)
{
    LL_InitTick(8000000, 1000);

    //Warning: if the line below triggers an error, GPIOC is not connected to a AHB1 (Group 1) on this device.
    //In this case, please search the stm32xxxx_ll_bus.h file for 'PERIPH_GPIOC' to find out the correct
    //macro name and use it to replace LL_AHB1_GRP1_PERIPH_$$com.sysprogs.examples.lBedblink.LEDPORT$$ and LL_AHB1_GRP1_EnableClock() below.
    LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_GPIOC);
    LL_GPIO_SetPinMode(GPIOC, LL_GPIO_PIN_13, LL_GPIO_MODE_OUTPUT);
    LL_GPIO_SetPinOutputType(GPIOC, LL_GPIO_PIN_13, LL_GPIO_OUTPUT_PUSHPULL);
    LL_GPIO_SetPinSpeed(GPIOC, LL_GPIO_PIN_13, LL_GPIO_SPEED_FREQ_LOW);
    LL_GPIO_SetOutputPin(GPIOC, LL_GPIO_PIN_13);

    bufferp = buffer;

    for (;;)
    {
        LL_GPIO_SetOutputPin(GPIOC, LL_GPIO_PIN_13);
        strcpy(bufferp, "Hello");
        //printf("led off\n");
        LL_mDelay(500);
        LL_GPIO_ResetOutputPin(GPIOC, LL_GPIO_PIN_13);
        strcpy(bufferp, "World");
        //printf("led on\n");
        LL_mDelay(500);
    }
}