For most embedded CPU architecture implementations, the JTAG port is used by the debugger to interface the chip for debugging one or more cores. The normal user will probably not need to know details of the JTAG implementation unless there is a need…

New version released ! V2.45 (Check version list for details) This construction is based on HappyJTAG Idea, to implement JTAG interface into target avr system and debug it remotly via USB, without specific JTAGICE hardware. All job is done by PC soft…

// 文章首发于 https://zhuanlan.zhihu.com/p/28762429 // 但是不知道为什么搜索引擎还没有收录,便在博客再次发布. 0. 引言 意法半导体生产的 SH4 架构的 ST40 CPU 被广泛地用于机顶盒中. 对于DIY家庭硬件来说,救砖途径十分重要,尤其是在 FLASH 由于误操作被清空时,不能使用 u-boot 之类的 bootloader,JTAG 几乎就成了唯一较方便的救转方式. (当然还可以用编程器直接写 FLASH,不过贴片的 FLASH 芯片用烙铁…

JTAG Finder Figuring out the JTAG Pinouts on a Device is usually the most time-consuming and frustrating process and Finding the pinouts for these ports allows you to access with correct JTAG Devices likeGPG ORT,  and JTAG Finder helps you to get sta…

用户在调试内嵌可综合内核的 CPU 如 ARM7TDMI-S 时,需要通过打开仿真器的自适应时钟功能. 此时,ARM仿真器根据 RTCK 时钟信号的频率,产生可用于 CPU 内核当前时钟主频的最快的 TCK 时钟. 即 ARM 内核的时钟主频变化,引起 RTCK 变化, 仿真器根据 RTCK 的变化,产生合适的最快的 TCK 时钟. 如果没有有效的 RTCK 信号,用户不能使用自适应时钟功能.这种情况下,用户可以设置 TCK 为比较低的频率. 当用户确认 CPU 运行在比较高的频率的情况下,可以…

PSoC 5 supports programming through the serial wire debug (SWD) interface. There are two signals in SWD interface: data signal (SWDIO) and a clock for data signal (SWDCK). The host programmer always drives the clock line, whereas either the programme…

JTAG Simplified So the other day, I explored the JTAG bus interface which is frequently found in CPLDs/FPGAs and is most of the times the sole method of programming and debugging them. It is a powerful interface and very easy to use. I intend to writ…

This document provides you with interesting background information about the technology that underpins XJTAG. You do not need to know any of this however to be able to use the XJTAG development system as XJTAG tests are developed in a high-level prog…

Implementation of Serial Wire JTAG flash programming in ARM Cortex M3 Processors The goal of the project was to use the Serial Wire JTAG protocol implemented in the ARM cortex processors for programming the flash memory of it. JTAG was actually imple…

http://www.ethernut.de/en/hardware/turtelizer/ Introducing Turtelizer 2 Overview Turtelizer 2 had been developed to provide JTAG Flash programming and debugging of ARM based boards via USB. Typical target boards are Ethernut 3 , the Elektor Internet…