RAM中调试是不限制断点数量的，而Flash中调试有硬件断点和软件断点之分

eric2013

地址：https://www.segger.com/products/debug-probes/j-link/technology/flash-breakpoints/
091016_Flash_breakpoints_IQ_magazine.pdf (3.55 MB, 下载次数: 138)

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How Breakpoints Work

There are basically 2 types of breakpoints in a computer system: Hardware breakpoints and software breakpoints. Hardware breakpoints require a dedicated hardware unit for every breakpoint. In other words, the hardware dictates how many hardware breakpoints can be set simultaneously. ARM7, ARM9, and some devices implemented with the Cortex-M0+ cores have 2 breakpoint units (called "watchpoint units" in ARM's documentation), allowing 2 hardware breakpoints to be set. Hardware breakpoints do not require modification of the program code. Software breakpoints are different: The debugger modifies the program and replaces the breakpointed instruction with a special value. Additional software breakpoints do not require additional hardware units in the processor, since instructions are replaced inside the code to indicate the breakpoint. This is a standard procedure that most debuggers are capable of, however, it requires the program to be located in RAM.

eric2013

liugang1986

过年好啊，过节也不休息吗？

eric2013

liugang1986 发表于 2018-2-18 18:05
过年好啊，过节也不休息吗？

休息了，差不多休息了5天

tianqi9112001

非常感谢。