rabbit80 发表于 2016-7-23 15:20:35

stm32F207 APB1输出最大时钟给TIMER3问题,求大神解决

大家好,本人最近在编写F207定时器时(使用timer3,采用APB1总线).
问题描述:
(1)寄存器配置情况:
即此进,我对RCC_CFGR,不做任何配置(APB1:即PPRE1为“000”。AHB:即HPRE,PLL作为系统时钟输出为120M)
(2)现象:
配置TIMER3,
120分频,溢出中断次数为1000,中断产生周期是1ms(APB1,未分频)。
(3)疑问:
按照芯片手册
data:image/png;base64,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

PLLCLK = 120M; AHB 未分频;APBX未分频,从APBX出来的结果应该是120M,但由于APB1最大为30M,那么其输出到定时器最大时钟
应该最多为60M?
可是我查看溢出中断的波形分明为1ms,计数1000次,120分频计算的结果是120M.
请问如何达到120M, 给APB1 TIMER???

Dylan疾风闪电 发表于 2016-7-25 09:02:15

本帖最后由 Dylan疾风闪电 于 2016-7-25 09:05 编辑

先上图,借cube模拟一个时钟配置:
从图中可以看到,APB1总线定时器的最高时钟频率为60MHz,即TIMx_CLK(max)=60MHz。
那么接下来就是TIMx_PSC分频后会产生一个 n * TIMx_CLK。

Dylan疾风闪电 发表于 2016-7-25 09:09:37

接2楼,APB1 Timer 时钟取最高60MHz,TIMER3120分频,溢出中断次数为1000。

F=(60M*2)/(119+1)/(999+1)=1kHz

:)

乞丐工程师 发表于 2016-7-25 09:19:14

学习了:lol:lol:lol

wenyangzeng 发表于 2016-7-25 11:01:43

PLLCLK = 120M,一个上升沿,一个下降沿,应该要2个时钟周期了吧。

rabbit80 发表于 2016-7-25 11:08:25

Dylan疾风闪电 发表于 2016-7-25 09:02
先上图,借cube模拟一个时钟配置:
从图中可以看到,APB1总线定时器的最高时钟频率为60MHz,即TIMx_CLK(ma ...

非常感谢您的回复,因为我司网络屏蔽了上传功能,无法上传图片。
您的这张图非常详细,再次感谢:
       在图解中可以看到APB1总线出来的最高频率为30MHZ,2倍以后,最大为60MZ,图示明确指出APB1定时器的最高输入时钟频率为60M。这一点我们的理解是一样的。
       我的重点问题是:根据我的调试计算,APB1的定时器时钟最高可达120M,与最大60M(30M*2=60M)相矛盾。此外,您说X2倍=120M,其实,从APB1出来的30M已经X2了,所以此处依然令人困扰,烦请解释呀。多谢谢了。

rabbit80 发表于 2016-7-25 11:39:08

Dylan疾风闪电 发表于 2016-7-25 09:09
接2楼,APB1 Timer 时钟取最高60MHz,TIMER3120分频,溢出中断次数为1000。

F=(60M*2)/(119+1)/(999+1 ...

TIMx_PSC=120;这个是预分频参数;重计数周期为1000,根据输出波形发现是1ms;
根据计算公式如下:
Tout=((arr+1)*(psc+1))/Tclk 得出Tclk = 120M;

看您的回复中
F=(60M*2)/(119+1)/(999+1 ...
我有点不明白60M为什么还要再乘以2;因为系统乘2,在APB1输出到TIMER3的时候,已经做过了。

huaiqiao 发表于 2016-7-25 21:50:39

如果对这个时钟不太清楚的话,我建议你去用CubeMX的那个时钟配置界面去配置。或者ST官方的有一个Excel+pdf的时钟配置工具,您可以看看呢。

rabbit80 发表于 2016-7-26 10:33:34

huaiqiao 发表于 2016-7-25 21:50
如果对这个时钟不太清楚的话,我建议你去用CubeMX的那个时钟配置界面去配置。或者ST官方的有一个Excel+pdf ...

谢谢指点,不过,我的疑问仅在于最大输出为60M,到了TIM3后,为何TIM3

rabbit80 发表于 2016-7-26 10:33:53

huaiqiao 发表于 2016-7-25 21:50
如果对这个时钟不太清楚的话,我建议你去用CubeMX的那个时钟配置界面去配置。或者ST官方的有一个Excel+pdf ...

谢谢指点,不过,我的疑问仅在于最大输出为60M,到了TIM3后,为何TIM3的时钟源变成了120M???
页: [1] 2
查看完整版本: stm32F207 APB1输出最大时钟给TIMER3问题,求大神解决