Incorrect 1ms delay at GD32VF103 - c

Question

I use GD32VF103C_START kit from GigaDevice and try LED blinking sample project. I found this project in the Internet and it compiles just fine (I've only changed from 500ms to 1000ms=1s).
main.c:
#include "gd32vf103.h"
#include "gd32vf103c_start.h"
#include "systick.h"
int main(void)
{
/* enable the LED clock */
rcu_periph_clock_enable(RCU_GPIOA);
/* configure LED GPIO port */
gpio_init(GPIOA, GPIO_MODE_OUT_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_7);
gpio_bit_reset(GPIOA, GPIO_PIN_7);
while(1){
/* insert 1s delay */
delay_1ms(1000);
/* toggle the LED */
gpio_bit_write(GPIOA, GPIO_PIN_7, (bit_status)(1-gpio_input_bit_get(GPIOA, GPIO_PIN_7)));
/* insert 1s delay */
delay_1ms(1000);
gpio_bit_write(GPIOA, GPIO_PIN_7, (bit_status)(1-gpio_input_bit_get(GPIOA, GPIO_PIN_7)));
}
}
systick.c:
#include "gd32vf103.h"
#include "systick.h"
void delay_1ms(uint32_t count)
{
uint64_t start_mtime, delta_mtime;
/* don't start measuruing until we see an mtime tick */
uint64_t tmp = get_timer_value();
do{
start_mtime = get_timer_value();
}while(start_mtime == tmp);
do{
delta_mtime = get_timer_value() - start_mtime;
}while(delta_mtime <(SystemCoreClock/4000.0 *count));
}
But instead of 1s delay it delays like for 13s. Where is mistake?

Answer 1

Problem is non in main.c, neither in systick.c, it's in system_gd32vf103.c.
There are:
/* system frequency define */
#define __IRC8M (IRC8M_VALUE) /* internal 8 MHz RC oscillator frequency */
#define __HXTAL (HXTAL_VALUE) /* high speed crystal oscillator frequency */
#define __SYS_OSC_CLK (__IRC8M) /* main oscillator frequency */
/* select a system clock by uncommenting the following line */
/* use IRC8M */
//#define __SYSTEM_CLOCK_48M_PLL_IRC8M (uint32_t)(48000000)
//#define __SYSTEM_CLOCK_72M_PLL_IRC8M (uint32_t)(72000000)
//#define __SYSTEM_CLOCK_108M_PLL_IRC8M (uint32_t)(108000000)
/********************************************************************/
//#define __SYSTEM_CLOCK_HXTAL (HXTAL_VALUE)
//#define __SYSTEM_CLOCK_24M_PLL_HXTAL (uint32_t)(24000000)
/********************************************************************/
//#define __SYSTEM_CLOCK_36M_PLL_HXTAL (uint32_t)(36000000)
//#define __SYSTEM_CLOCK_48M_PLL_HXTAL (uint32_t)(48000000)
//#define __SYSTEM_CLOCK_56M_PLL_HXTAL (uint32_t)(56000000)
//#define __SYSTEM_CLOCK_72M_PLL_HXTAL (uint32_t)(72000000)
//#define __SYSTEM_CLOCK_96M_PLL_HXTAL (uint32_t)(96000000)
#define __SYSTEM_CLOCK_108M_PLL_HXTAL (uint32_t)(108000000)
and you need uncomment #define __SYSTEM_CLOCK_HXTAL (HXTAL_VALUE) line. That's it.