Serial port transmitting method and device based on on-chip system

Abstract

The invention discloses a serial port transmitting method and device based on an on-chip system. The serial port transmitting method based on the on-chip system comprises the steps: acquiring a Baud rate and a delay machine period determined by a delay subprogram programmed by an assembly language, wherein the delay machine period is delay time for transmitting bit data; acquiring an analog serial port programmed by the assembly language; transmitting the output data of the on-chip system according to the delay machine period and the Baud rate by virtue of the analog serial port, wherein the analog serial port outputs the data according to a serial port data transmission rule. By adopting the method and device, the problems in the prior art that the data outputted in the debugging of Soc is incorrect can be solved, and an effect of accurately outputting data can be achieved.

Description

technical field [0001] The invention relates to the field of serial ports, in particular to a method and device for sending serial ports based on a system on chip. Background technique [0002] In the system on chip (Soc: System on chip), in order to reduce cost and power consumption, some unnecessary modules, such as the serial port communication module for debugging, are deleted; even some Socs also support the serial port function, but due to Restricted by the baud rate timer precision, crystal clock frequency and other reasons, it does not support higher baud rates, which increases the difficulty of debugging the software and hardware of the Soc. [0003] In the prior art, the C language is used to simulate the serial port for Soc data transmission. The inventors found that when compiling the C language, the timing will be misaligned, resulting in inaccurate output data and affecting the debugging of the Soc. [0004] For the problem of inaccurate data output when debug...

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a serial port transmission method and device based on the system on chip, to solve the problem of inaccurate data output when debugging the SOC in the prior art

Images