@aqzj5354
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STM32F4-Discovery USB sound card.
使用stm32f103系列实现的异步声卡,增加了CPLD外部时钟源(不再更新)
add uart AT cmd protocol for external control
"Das U-Boot" Source Tree
Copying over the NXP demo code for the iMXRT1050
awtk books and manuals