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docs/GD32F1x0_Firmware_Library_v3.1.0/Examples/ADC/Resolution/systick.c

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+/*!
+    \file  systick.c
+    \brief the systick configuration file
+*/
+
+/*
+    Copyright (C) 2017 GigaDevice
+
+    2014-12-26, V1.0.0, platform GD32F1x0(x=3,5)
+    2016-01-15, V2.0.0, platform GD32F1x0(x=3,5,7,9)
+    2016-04-30, V3.0.0, firmware update for GD32F1x0(x=3,5,7,9)
+    2017-06-19, V3.1.0, firmware update for GD32F1x0(x=3,5,7,9)
+*/
+
+#include "gd32f1x0.h"
+#include "systick.h"
+
+static uint32_t delay;
+
+/*!
+    \brief      configure systick
+    \param[in]  none
+    \param[out] none
+    \retval     none
+*/
+void systick_config(void)
+{
+    /* setup systick timer for 1000Hz interrupts */
+    if (SysTick_Config(SystemCoreClock / 1000)){
+        /* capture error */
+        while (1);
+    }
+    /* configure the systick handler priority */
+    NVIC_SetPriority(SysTick_IRQn, 0x00);
+}
+
+/*!
+    \brief      delay a time in milliseconds
+    \param[in]  count: count in milliseconds
+    \param[out] none
+    \retval     none
+*/
+void delay_1ms(uint32_t count)
+{
+    delay = count;
+
+    while(0 != delay);
+}
+
+/*!
+    \brief      delay decrement
+    \param[in]  none
+    \param[out] none
+    \retval     none
+*/
+void delay_decrement(void)
+{
+    if (0 != delay){
+        delay--;
+    }
+}