MDK-79525 凑字数

官网下载速度极慢，分享一下 Legacy support for Arm7, Arm9 & Cortex-R devices。 MDK Version 5 uses Software Packs to support a microcontroller device and to use middleware. To maintain backward compatibility with MDK Version 4 you may install Legacy Support. This might be necessary for two reasons: To maintain projects created with MDK Version 4 without migrating to Software Packs. To use older devices that are not supported by a Device Family Pack.