Tag：interrupt
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Time：2021-9-15
Command introduction The mpstat (multi processor Statistics) command is used to display the status statistics of each available CPU. It is a real-time monitoring tool, similar to vmstat, but can only monitor the overall performance status of the CPU. [[email protected] ~]# mpstat -bash: mpstat: command not found [[email protected] ~]# yum install sysstat -y Syntax format […]
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Time：2021-9-14
This article was originally published by 123 RT thread forum users:https://club.rt-thread.org/as… Guide for use analysis and troubleshooting of RTT serial port V1 Version (I) sketch Whether novices who have just come into contact with RT thread or experienced Daniel, when they use RT thread, the most frequently and widely used peripherals must be serial devices. […]
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Time：2021-9-13
Series catalog Preface preparation BIOS boot to real mode GDT and protection mode On virtual memory Load and enter the kernel Display and print Global descriptor table GDT Interrupt processing Virtual memory perfection Implement heap and malloc First kernel thread Multithreading operation and switching Lock and multithreading synchronization Enter user status Process implementation system call […]
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Time：2021-9-10
This article was originally published by RT thread forum account 123:https://club.rt-thread.org/as… Guide for use analysis and troubleshooting of RTT serial port V1 Version (II) Analysis of serial port related problems UndertakeGuide for use analysis and troubleshooting of RTT serial port V1 Version (I)article. Combined with the feedback information during the use of serial port, this […]
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Time：2021-9-9
Series catalog Preface preparation BIOS boot to real mode GDT and protection mode On virtual memory Load and enter the kernel Display and print Global descriptor table GDT Interrupt processing Virtual memory perfection Implement heap and malloc First kernel thread Multithreading operation and switching Lock and multithreading synchronization Enter user status Process implementation system call […]
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Time：2021-9-8
This article was originally published by 123 users of RT thread forum. The original text is as follows:https://club.rt-thread.org/as…Serial port problem of application layer When the application layer uses the serial port, it needs to specify the way (polling, interrupt or DMA) to open the serial port, and then operate the serial port. This part of […]
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Time：2021-9-5
Hello, I’m ruffian Heng, a serious technical ruffian. What ruffian Heng introduced to you today isTaking the GPIO module of i.mxrt as an example, this paper discusses the standard flow of interrupt handler (irqhandler)。 In the old prose of ruffian HengDesign and implementation of serial port (UART) automatic baud rate identification program (interrupt)In, we use […]
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Time：2021-9-4
Hello, I’m ruffian Heng, a serious technical ruffian. What ruffian Heng introduced to you today isIn the example of serial port baud rate identification, gradually show the 18 martial arts to improve code execution performance on i.mxrt。 The NXP MCU se team has been working overtime to catch up with the SBL project (solving the […]
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Time：2021-8-28
Hello, I’m ruffian Heng, a serious technical ruffian. What ruffian Heng shared with you today isDesign of standard triple interrupt control in embedded MCU。 We know that the reason why the program code can complete the multi task parallel real-time processing function in MCU bare metal machine is mainly scheduled by interrupt. Without interrupt, the […]
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Time：2021-8-26
Hello, I’m ruffian Heng, a serious technical ruffian. What ruffian Heng shared with you today isThree implementations of critical zone protection in Cortex-M bare metal environment。 Embedded friends who have played RTOS must be interested in OS_ ENTER_ CRITICAL(）、OS_ EXIT_ Critical () is a familiar function code. In RTOS, there are often multitasking (process) processing. […]
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Time：2021-8-22
Hello, I’m ruffian Heng, a serious technical ruffian. What ruffian Heng shared with you today isPrinciple of Cortex-M interrupt vector table and its redirection method。 Follow the previous paragraphThree implementations of critical zone protection in embedded Cortex-M bare metal environmentContinue to talk. In embedded code design, sometimes some special operations (such as flash erasure and […]
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Time：2021-8-10
Do you know how serious the consequences of forced shutdown are! One day, I was happily writing a technical article. As a result, the computer snapped on the blue screen! Oh, it’s over. I wrote thousands of words and forgot to save it! I blindly guess that many students have this experience. Maybe because of […]
