Method for using information of synchronous serial interface output and asynchronous serial port debugging on DSP

Abstract

The invention discloses a method for outputting asynchronous serial port debugging information by using a synchronous serial port on a DSP, using the corresponding relationship between the data frame structure of the synchronous serial port and the asynchronous serial port, and the corresponding relationship between the bit clock of the synchronous serial port and the baud rate of the asynchronous serial port , to construct an asynchronous serial port data frame; at the same time, perform logical AND operation on the frame synchronization and sending data pins of the synchronous serial port on the DSP, and expand its output value to make it conform to the asynchronous serial port timing, and output the asynchronous serial port debugging information. Compared with the existing technology, it overcomes the disadvantage of no debugging information output channel in the actual process of DSP, and provides a stable and reliable debugging output channel; it has good timeliness and can capture the abnormal state of DSP and provide clues for locating problems; UART wave The baud rate can be changed for the convenience of users.

Description

technical field [0001] The present invention relates to a method for using a synchronous serial port to output asynchronous serial port debugging information on a DSP in the application field of a digital signal processor, and more particularly relates to a method for using a synchronous serial port McBsp (Multichannel Buffered Serial Port) on a DSP produced by TI Company. Interface) to build an asynchronous serial UART (Universal Asynchronous Receiver / Transmitter) and use it to output debugging information. Background technique [0002] In the development process of DSP (Digital Singnal Processor) chip, the output of its debugging information has always been a focus of attention, especially when reproducing and locating problems. In the early stage of DSP development, the emulator can be used to output debugging information through the jtag port. In the productization stage, the debugging information of the Host-Slave-master-slave mode DSP can be output by the host through ...

AI Technical Summary

Problems solved by technology

These two methods have obvious disadvantages: the former is limited by the host interface, and if the channel is abnormal, the debugging information cannot be output normally; the latter has poor effectiveness, and the log needs to be read out with an emulator afterwards

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