TMS320C54X DSP软件实现UART技术

Implementation of a Software UART on TMS320C54X

基于目前TMS320C54X高速DSP芯片缺少UART标准接口,与带UART的外设直接进行异步通信比较困难的问题.介绍了一种用软件模拟实现UART方法,该方案采用最少的外部硬件电路,简单方便,灵活可靠;根据实际经验,给出了利用示波器观察UART收发数据的波形,并根据观察的结果,提出了对UART进行调试的两种方法.

Now, the TMS320C54X are not used to communicate directly the external device with UART port, because it hasnot UART port. Now the method of the implementation of a software UART on TMS320C54X, which can solve the problem easily, has been provided in this paper. In this method, no additional hardware is used. So this method is simple flexible and reliable. According to the practical experience, the waveform of the UART receiving and dispatching data have been observed by the oscilloscope. With the results, the two methods have been proposed for debugging UART.