Serial Wire Debug (SWD) provides a debug port for severely pin limited packages, often the case for small package microcontrollers but also complex ASICs where limiting pin-count is critical and can be the controlling factor in device costs. SWD repl…

Serial Wire Debugging the STM32 via the Bus Pirate 2 October 2010 Step 1 - The Bus Pirate Step 2 - Debug Port Communications Step 3 - Access Port Communications Step 4 - Processor State Step 5 - Programming the Flash Step 6 - Optimizing Conclusion So…

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…

Being able to display values for counters, sensors and other debugging information is an important part of software development for microcontrollers.  Writing software for PCs is much easier in this regard as there is already a monitor to which you c…

1 Debug Interface Overview 1.1 Serial Wire Debug Serial Wire Debug (SWD) is a two-wire protocol for accessing the ARM debug interface. It is part of the ARM Debug Interface Specification v5 and is an alternative to JTAG. The physical layer of SWD con…

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…

SW-DP (Serial Wire Debug Port) Analyzer plugin for the Saleae Logic The SW-DP protocol is described by the following publicly available documents: DDI 0316 CoreSight™ DAP-Lite Technical Reference Manual Programming Internal Flash Over the Serial Wire…

KL46 custom board SWD reset is never asserted Hi everybody, I'm trying to program a custom board based on the KL46. However the reset signal for the SWD port is stuck at logic LOW. My programmer is a P&E Multilink FX. I can successfully program my te…

1.ST官方正式出版了两种仿真器:ST-LINK.ST-LINK/V2,其他型号(ST-LINK II,ST-LINK III,…)要么是国内公司生产,要么是开发板自带的:2.在ST官网ST-LINK的状态为NRND(not recommended for new designs),官方已经不建议在新产品设计中使用该产品:3.ST-LINK/V2是官方最新主推的STM8.STM32仿真器,内部电路.接口保护均作了改进: 还有一个支持隔离的ST-LINK/V2版本,order code是ST-Li…

JTAG was the traditional mechanism for debug connections for ARM7/9 parts, but with the Cortex-M family, ARM introduced the Serial Wire Debug (SWD) Interface. SWD is designed to reduce the pin count required for debug from the 5 used by JTAG (includi…