zyh 206ce5121d [BSP][STM32F4xx-HAL]readme.md add figure 8 anni fa
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figure1.png 206ce5121d [BSP][STM32F4xx-HAL]readme.md add figure 8 anni fa
figure2.png 206ce5121d [BSP][STM32F4xx-HAL]readme.md add figure 8 anni fa