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- void delay_us(uint32_t nus)
- {
- uint32_t temp;
- SysTick->LOAD = 72000000/1000000/8*nus;
- SysTick->VAL=0X00;
- SysTick->CTRL=0X01;
- do
- {
- temp=SysTick->CTRL;
- }while((temp&0x01)&&(!(temp&(1<<16))));
- SysTick->CTRL=0x00;
- SysTick->VAL =0X00;
- }
- void delay_ms(uint16_t nms)
- {
- uint32_t temp;
- SysTick->LOAD = 72000000/1000/8*nms;
- SysTick->VAL=0X00;
- SysTick->CTRL=0X01;
- do
- {
- temp=SysTick->CTRL;
- }while((temp&0x01)&&(!(temp&(1<<16))));
- SysTick->CTRL=0x00;
- SysTick->VAL =0X00;
- }
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