怎么使用STM32驱动这个串口扩展芯片。并演示一个用CH438发送一段MODBUS码给电脑,电脑发给STM32的数据数据也回显示到电脑上.CH438我用的是44管脚的LQFP44封装。实际的电路是这样的：...
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摘要STM32单片机都带有ROM和RAM，其中STM32根据自身的ROM(Flash)可以分为小容量产品、中容量产品、大容量产品根据FLASH容量可以分为：小容量：0-
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