基于寄存器分时复用的DSP串口扩展设计与实现

Design and Implementation of DSP Serial Port Expansion Based on Register Time-division Multiplexing

针对控制系统核心处理芯片DSP异步串口资源不足,提出了一种基于DSP寄存器分时复用的串口扩展方法。对基于TMS320F28335型DSP的串口资源进行了研究,对串口扩展的硬件电路设计和软件设计进行了阐述,并搭建平台对其扩展功能进行了测试验证。测试结果表明,此扩展方法可靠、简捷、硬件开销小,有效提升了DSP自身异步串口资源的利用率,对于多外设控制系统设计有较高的参考价值。

Aiming at the lack of asynchronous serial port resources of the core processing chip DSP in the control system,a serial port expansion method based on time-division multiplexing of DSP registers is proposed.The serial port resource based on TMS320F28335 DSP is studied,the hardware circuit design and software program design are expounded,and a platform is built to test and verify its extended function.The test results show that this extension method is reliable,simple,and has low hardware overhead,which effectively improves the utilization rate of the asynchronous serial port resources of the DSP itself,and has a high reference value for the design of multi-peripheral control systems.