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下载下来需要 许可证，免费的许可证在哪里找？
IAR是不免费的，有代码大小限制的试用版
CCS是免费的
https://software-dl.ti.com/ccs/esd/documents/ccs_downloads.html
IAR，代码大小限制的试用版 在哪里下？
在您上图给出的地方就有
a size-limited Kickstart license without any time limit
