“TIM Linux driver”的版本间的差异

来自百问网嵌入式Linux wiki
 
（未显示同一用户的6个中间版本）
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== Short description ==
 
== Short description ==
−
The ''TIM''<ref name="TIM internal peripheral"/> Linux driver (kernel space) is based on the [[PWM overview|PWM]] and [[IIO overview|IIO]] frameworks. It provides several functionalities:
+
Linux驱动程序（内核空间）“ TIM” <ref name="TIM internal peripheral"/> 基于 [[PWM overview|PWM]] 和 [[IIO overview|IIO]] 框架。 它提供了几种功能：
  
−
'''MFD driver''':
+
'''MFD驱动程序''':
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* handles registers, clock and DMA<ref name="DMA internal peripheral">[[DMA_internal_peripheral]]</ref> resources
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* 处理寄存器，时钟和DMA<ref name="DMA internal peripheral">[[DMA_internal_peripheral]]</ref>资源
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* detects the TIM counter resolution, e.g. 16 or 32 bits.
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* 检测TIM计数器分辨率，例如 16或32位。
−
'''PWM driver''':
+
'''PWM驱动器''':
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* detects the number of TIM channels.
+
* 检测TIM通道数。
−
* handles '''PWM output''' channels.
+
* 处理'''PWM输出'''通道。
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* handles '''PWM capture''' channels (input). Note that the PWM capture relies on DMA, which is handled by the MFD core.
+
*处理'''PWM捕捉'''通道（输入）。 请注意，PWM捕获依赖于由MFD内核处理的DMA。
−
'''IIO driver''':
+
'''IIO 驱动程序''':
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* handles hardware '''trigger sources''' (synchronously with PWM) for other internal peripherals such as ADC<ref name="adc_internal">[[ADC internal peripheral]]</ref>, DAC<ref name="dac_internal">[[DAC internal peripheral]]</ref>, DFSDM<ref name="dfsdm_internal">[[DFSDM internal peripheral]]</ref>.
+
* 处理其他内部外围设备的硬件''触发源''(与PWM同步)，例如ADC <ref name="adc_internal">[[ADC internal peripheral]]</ref>, DAC<ref name="dac_internal">[[DAC internal peripheral]]</ref>, DFSDM<ref name="dfsdm_internal">[[DFSDM internal peripheral]]</ref>.
−
* handles the '''quadrature encoder''' interface<ref>[https://en.wikipedia.org/wiki/Rotary_encoder#Incremental_encoder Incremental encoder] Incremental encoder overview</ref>.
+
* 处理‘正交编码器'''quadrature encoder''' interface<ref>[https://en.wikipedia.org/wiki/Rotary_encoder#Incremental_encoder Incremental encoder] Incremental encoder overview</ref>.
  
 
== Configuration ==
 
== Configuration ==
 
=== Kernel configuration ===
 
=== Kernel configuration ===
−
Activate the TIM<ref name="TIM internal peripheral"/> Linux driver in the kernel configuration using the Linux Menuconfig tool: [[Menuconfig or how to configure kernel]].
+
使用Linux Menuconfig工具在内核配置中激活TIM驱动程序<ref name="TIM internal peripheral"/> [[Menuconfig or how to configure kernel]].
  
−
Enable the following configurations (and their dependencies):
+
启用以下配置（及其依赖项）
 
* CONFIG_MFD_STM32_TIMERS
 
* CONFIG_MFD_STM32_TIMERS
 
* CONFIG_PWM_STM32
 
* CONFIG_PWM_STM32
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=== Device tree ===
 
=== Device tree ===
−
Refer to the [[TIM device tree configuration]] article when configuring the TIM Linux kernel driver.
+
配置TIM Linux内核驱动程序时，请参阅[[TIM device tree configuration]] 文章。
  
 
== How to use ==
 
== How to use ==
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== How to trace and debug ==
 
== How to trace and debug ==
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The ''TIM''<ref name="TIM internal peripheral"/> Linux driver can access the timer registers through REGMAP.
+
Linux驱动程序“ TIM”<ref name="TIM internal peripheral"/> 可以通过REGMAP访问定时器寄存器。
 +
 
 +
它带有debugfs <ref name="debugfs">[[Debugfs]]</ref>条目，这些条目允许转储寄存器：
 +
 
  
−
It comes with debugfs<ref name="debugfs">[[Debugfs]]</ref> entries, which allow dumping registers:
 
−
$ cd /sys/kernel/debug/regmap
 
 
  $ ls
 
  $ ls
 
  40004000.timer  44000000.timer
 
  40004000.timer  44000000.timer
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  ...
 
  ...
  
−
It also comes with tracepoints<ref name="ftrace">[[Ftrace]]</ref>:
+
它还带有tracepoints <ref name="ftrace">[[Ftrace]]</ref>:
 
  $ cd /sys/kernel/debug/tracing
 
  $ cd /sys/kernel/debug/tracing
 
  $ cat available_events | grep regmap
 
  $ cat available_events | grep regmap
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== Source code location ==
 
== Source code location ==
−
The TIM Linux driver source code is composed of:
+
TIM Linux驱动程序源代码包括：
−
* {{CodeSource | Linux kernel | drivers/mfd/stm32-timers.c | stm32-timers.c MFD driver}} to handle common resources: registers, clock, dmas.
+
* {{CodeSource | Linux kernel | drivers/mfd/stm32-timers.c | stm32-timers.c MFD driver}} 处理常见资源：寄存器，时钟，dmas。
−
* {{CodeSource | Linux kernel | drivers/pwm/pwm-stm32.c | pwm-stm32.c PWM driver}} to handle PWM channel(s).
+
* {{CodeSource | Linux kernel | drivers/pwm/pwm-stm32.c | pwm-stm32.c PWM driver}} 要处理PWM通道，请执行以下操作.
−
* {{CodeSource | Linux kernel | drivers/iio/trigger/stm32-timer-trigger.c | stm32-timer-trigger.c IIO driver}} to handle trigger source for other internal peripherals and quadrature encoder interface.
+
* {{CodeSource | Linux kernel | drivers/iio/trigger/stm32-timer-trigger.c | stm32-timer-trigger.c IIO driver}} 来处理其他内部外设和正交编码器接口的触发源。
−
* {{CodeSource | Linux kernel | include/linux/mfd/stm32-timers.h}} and {{CodeSource | Linux kernel | include/linux/iio/timer/stm32-timer-trigger.h}} header files
+
* {{CodeSource | Linux kernel | include/linux/mfd/stm32-timers.h}} and {{CodeSource | Linux kernel | include/linux/iio/timer/stm32-timer-trigger.h}} 头文件
  
 
==References==
 
==References==
 
<references />
 
<references />
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−
<noinclude>
 
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[[Category:Timers]]
 
−
[[Category:IIO]]
 
−
{{PublicationRequestId | 9233 | 2018-10-15 | AnneJ}}
 
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{{ArticleBasedOnModel | Linux driver article model}}
 
−
</noinclude>
 

2020年11月10日 (二) 10:41的最新版本

Article purpose

本文介绍了用于TIM内部外围设备的TIM Linux® 驱动程序[1]:

  • 驱动程序支持哪些TIM功能
  • 如何配置，使用和调试驱动程序
  • 驱动程序的结构是什么，以及在哪里可以找到源代码。

Short description

Linux驱动程序（内核空间）“ TIM” [1] 基于 PWM 和 IIO 框架。 它提供了几种功能：

MFD驱动程序:

  • 处理寄存器，时钟和DMA[2]资源
  • 检测TIM计数器分辨率，例如 16或32位。

PWM驱动器:

  • 检测TIM通道数。
  • 处理PWM输出通道。
  • 处理PWM捕捉通道（输入）。 请注意，PWM捕获依赖于由MFD内核处理的DMA。

IIO 驱动程序:

  • 处理其他内部外围设备的硬件触发源(与PWM同步)，例如ADC [3], DAC[4], DFSDM[5].
  • 处理‘正交编码器quadrature encoder interface[6].

Configuration

Kernel configuration

使用Linux Menuconfig工具在内核配置中激活TIM驱动程序[1]Menuconfig or how to configure kernel.

启用以下配置（及其依赖项）

  • CONFIG_MFD_STM32_TIMERS
  • CONFIG_PWM_STM32
  • CONFIG_IIO_STM32_TIMER_TRIGGER
Device Drivers  --->
  -> Multifunction device drivers  --->
     <*> Support for STM32 Timers
  -> Pulse-width modulation (PWM) support  --->
     <*> STMicroelectronics STM32 PWM
  -> Industrial I/O support  --->
     -> Triggers - standalone  --->
        <*> STM32 timer trigger

Device tree

配置TIM Linux内核驱动程序时，请参阅TIM device tree configuration 文章。

How to use

How to use PWM with sysfs interface

How to set up a TIM or LPTIM trigger using the sysfs interface

How to use the quadrature encoder with the sysfs interface

How to trace and debug

Linux驱动程序“ TIM”[1] 可以通过REGMAP访问定时器寄存器。

它带有debugfs [7]条目，这些条目允许转储寄存器： 


$ ls
40004000.timer  44000000.timer

$ cd 44000000.timer
$ cat registers
000: 00000081
004: 00000000
008: 00000000
00c: 00000000
...

它还带有tracepoints [8]: 

$ cd /sys/kernel/debug/tracing
$ cat available_events | grep regmap
...
regmap:regmap_reg_read
regmap:regmap_reg_write

Source code location

TIM Linux驱动程序源代码包括：

References

  1. ↑ 1.01.11.21.3 TIM internal peripheral
  2. ↑ DMA_internal_peripheral
  3. ↑ ADC internal peripheral
  4. ↑ DAC internal peripheral
  5. ↑ DFSDM internal peripheral
  6. ↑ Incremental encoder Incremental encoder overview
  7. ↑ 调试文件系统(debugfs)
  8. ↑ Ftrace
取自“http://wiki.100ask.org/index.php?title=TIM_Linux_driver&oldid=7774”