以mdm9x07为例 /sys/class/gpio # cat /sys/kernel/debug/gpio cat /sys/kernel/debug/gpio GPIOs 0-79, platform/1000000.pinctrl, 1000000.pinctrl: gpio0 : out 0 4mA no pull gpio1 : in 0 2mA pull down ...
以mdm9x07为例 /sys/class/gpio # cat /sys/kernel/debug/gpio cat /sys/kernel/debug/gpio GPIOs 0-79, platform/1000000.pinctrl, 1000000.pinctrl: gpio0 : out 0 4mA no pull gpio1 : in 0 2mA pull down ...
原有GPIO配置框架: 之前所有的gpio操作都是通过gpiolib来实现,常用的api包括: staticinline int gpio_request(unsigned gpio, const char *label); staticinline int gpio_direction_input(unsigned ...
Linux Pinctrl(Pin control) 是一个子系统,控制芯片的引脚复用、电气属性和其他和硬件相关的设置。本文将介绍 Linux Pinctrl 子系统的基本概念,架构和使用方法。基本概念学习内容作者。
一、pin control subsystem 的软件框架图 1、功能和接口概述 一般而言,学习复杂的软件组件或者软件模块是一个痛苦的过程。我们可以把我们要学习的那个软件 block 看成一个黑盒子,不论里面有多么复杂,第一步总是...
1.接口(此部分摘自http://www.wowotech.net/gpio_subsystem/pin-control-subsystem.html) (1)devm_pinctrl_get和pinctrl_get。devm_pinctrl_get是Resource managed版本的pinctrl_get,核心还是pinctrl_get函数。...
GPIO相关硬件有哪些差异嵌入式工程师总是要处理各种各样的target board,每个target board上的GPIO总是存在不同,例如: 1、和CPU的连接方式不同 对于ARM的嵌入式硬件平台,SOC本身可以提供大量的IO port,SOC上的...
PINCTRL (PIN CONTROL) subsystem This document outlines the pin control subsystem in Linux This subsystem deals with: - Enumerating and naming controllable pins - Multiplexing of pins, pads, finger....
* struct pinctrl_dev - pin control class device * @node: node to include this pin controller in the global pin controller list * @desc: the pin controller descriptor supplied when initializi
As a iOS engineer, you are asked to collect user's input for a pin code. How can we make it? You can simply use a UITextField to do that, but it doesn't make sense that user can enter any characters ...
控制流图 用于将英特尔 PIN 二进制可执行输出处理为图形表示的 Python 脚本
Recent advances of space-time-coding digital metasurfaces demonstrate powerful capabilities in the generation of nonlinear harmonics and the accurate control of the corresponding wavefronts....
测试机 IC S100 YTEC S50 V50
半导体生产商Rohm株式会社已开发了适用于汽车音响、汽车天线系统的AGC(Auto Gain Control)电路的PIN二极管RN771V、RN779F和RN779D,并于年7月开始样品出货(样品价格15日元/个),于年8月起以月产100万个的规模正式...