topic Re: How to use the K64 pit to design the delay function？ in Kinetis Microcontrollers

How to use the K64 pit to design the delay function？

zhailing — Tue, 07 Mar 2017 10:48:00 GMT

I want to design a precise delay time；

for example：the stm32；

1.config the register directly

void delay_ms(uint16_t ms) {  TIM6->PSC=35999;  TIM6->ARR=ms*2;  TIM6->CR1|=(1<<3);  TIM6->CR1|=0x1;  while((TIM6->SR&0X1)==0);  TIM6->SR=0; }

2.config the sdk
void TIM6_Delay_ms(uint16_t ms) {  /* 定义一个定时器基本定时初始化结构体变量 */  TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;    /* 时钟预分频数为36000，在主频72M时，计数器每500us加1*/  TIM_TimeBaseInitStruct.TIM_Prescaler= 35999;    /* 自动重装载寄存器值 */  TIM_TimeBaseInitStruct.TIM_Period=ms*2;    /* 把上面的值配置到寄存器 */  TIM_TimeBaseInit(TIM6, &TIM_TimeBaseInitStruct);    /* 设置定时时间到了以后停止定时器计数 */  TIM_SelectOnePulseMode(TIM6, TIM_OPMode_Single);    /* 清除SR中的UIF标志 */  TIM_ClearFlag(TIM6, TIM_IT_Update);    /* 打开定时器6 */  TIM_Cmd(TIM6, ENABLE);    /* 检测定时时间是否到来 */  while(TIM_GetFlagStatus(TIM6, TIM_IT_Update)==RESET);   /* 软件清除更新标志 */  TIM_ClearFlag(TIM6, TIM_IT_Update); }

How to config the register of k64？

Thangks and best regards

zhai

Re: How to use the K64 pit to design the delay function？

kerryzhou — Wed, 08 Mar 2017 03:10:50 GMT

Hi Zhai ling,

About the K64 pit usage, please refer to our K64 sample code, which can be download from this link:

Welcome to Kinetis Expert | Kinetis Expert

Click build an SDK, then select the board as FRDM-K64F120M, generate the code and download it, you can find the PIT code in folder:

SDK_2.0_FRDM-K64F\boards\frdmk64f\driver_examples\pit

The code in red frame can realize 1S PIT delay.

Wish it helps you!

If you still have question, please let me know!

Have a great day,
Kerry

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Re: How to use the K64 pit to design the delay function？

zhailing — Fri, 10 Mar 2017 06:48:17 GMT

Hi Kerry

I have solute the qustion！

Thanks very much！

zhai

Re: How to use the K64 pit to design the delay function？

kerryzhou — Mon, 13 Mar 2017 10:26:01 GMT

Hi Zhai ling,

If your question is solved, please help to mark the correct answer to close this question.

Thank you and have a nice day!

Have a great day,
Kerry