- #include "stdio.h"
- #include "NuMicro.h"
-
-
- static void SYS_Init(void)
- {
- /* Unlock protected registers */
- SYS_UnlockReg();
-
- /* Enable HIRC */
- CLK_EnableXtalRC(CLK_PWRCTL_HIRCEN_Msk);
-
- /* Waiting for HIRC clock ready */
- CLK_WaitClockReady(CLK_STATUS_HIRCSTB_Msk);
-
- /* Switch HCLK clock source to HIRC */
- CLK_SetHCLK(CLK_CLKSEL0_HCLKSEL_HIRC, CLK_CLKDIV0_HCLK(1));
-
- /* Set both PCLK0 and PCLK1 as HCLK/2 */
- CLK->PCLKDIV = (CLK_PCLKDIV_APB0DIV_DIV2 | CLK_PCLKDIV_APB1DIV_DIV2);
-
- /* Update System Core Clock */
- /* User can use SystemCoreClockUpdate() to calculate PllClock, SystemCoreClock and CycylesPerUs automatically. */
- SystemCoreClockUpdate();
-
- /* Lock protected registers */
- SYS_LockReg();
- }
-
-
- static void delay_ms(uint16_t nDelay)
- {
- uint16_t nIndex;
- for(nIndex = 0; nIndex < nDelay; nIndex++)
- {
- CLK_SysTickDelay(1000);//delay one ms
- }
- }
-
- int32_t main(void)
- {
-
- /* Init System, IP clock and multi-function I/O. */
- SYS_Init();
-
- GPIO_SetMode(PB,BIT14,GPIO_MODE_OUTPUT);
- while(1){
- PB14 = 1;
- delay_ms(1000);
- PB14 = 0;
- delay_ms(1000);
- }
- }
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