STM32-USB之Buffer Description Table

時間 2021-01-11

原文原文鏈接

一. stm32的USB接口每個端點對應兩個分組緩衝區，其地址與範圍位於分組存儲區。從STM32的數據手冊中存儲器映像->寄存器組起始地址看到： (注意地址範圍大小爲1024，APB1按32BIT對齊訪問，但此SRAM是由256個16BIT字組成) 這512BYTE的SRAM便是分組存儲區；而Buffer Description Table（緩衝區描述表）則用於定位與劃分各個端點的緩衝區緩衝區

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