- #Lua read write serial port how to#
- #Lua read write serial port serial#
- #Lua read write serial port driver#
#Lua read write serial port serial#
This layer will see the configuration of the serial port hardware, read-write registers, interrupt operations, etc. This layer calls rt_hw_serial_register()The function registers the serial port device to the operating system, which is also the medium for directly dealing with the serial port hardware.
#Lua read write serial port driver#
Then the serial device driver (the source code is located in bsp/xxx/drivers/drv_usart.c）The serial device driver is responsible for instantiating the serial device. The second is UART device driver framework (the source code is located in components\drivers\serial\serial.c）, the serial device driver framework implements the interface of the operation method of the device framework rt_serial_open/close/read/write/control()。 For example, the device framework rt_device_open()Interface is to open a device object, and corresponding to the serial port framework, it is docked to rt_serial_open() 。 This article does not do in-depth discussion, just understand. When users (application layer) use the serial port, they operate according to the model in the following figure:įirst, you need to use the device framework (the source code is located in src/device.cWhat is the device framework, such as the one used rt_device_open/close/read/write/control()And other API operation interfaces are the interfaces of the device framework used. The serial port process analysis is divided into two parts: one is the serial port driver and the other is the serial port framework. So don’t talk more nonsense, open the whole. So, This paper aims to summarize the problems encountered in the use of serial port and analyze the execution process of serial port, if you need detailed serial port process analysis, you can move step by step Document center serial port chapter, or search the Internet by yourself. Since the serial port V1 version has been developed and iterated for many years, and has been compiled by most developers and widely circulated, if this paper makes a detailed analysis of it, it is obviously a waste of your valuable time. It’s my purpose to distinguish Serial port V2 versionThe temporary name, of course, will be introduced in the serial port V2 version later, which is constantly updated) (it needs to be explained here, Serial port V1 versionThis name is unofficial.
#Lua read write serial port how to#
This paper will first analyze and explain the serial port V1 version on the platform of STM32 (Part I), and summarize how to solve the serial port problems (Part II). This is also the main work of this article. Since the serial port equipment is so important, the audience is so large, and the scope of use is so wide, it is necessary to take care of the serial port framework, summarize the problems, and point out the direction to solve the problems for the majority of developers. Therefore, as the most frequently used and widely covered serial port device, if you understand it, it will be even more powerful in your project development, or you will have a deeper understanding of embedded system. It is also the component most frequently used by developers.Īnother example is ulog component, at component, ymodem component and RT_ Link components, whose underlying data streams have traces of serial ports. As follows: \ | /įor example, fish component, which realizes the function of human-computer interaction in the way of command line, plays an important role in project development and debugging. If the output is successful, it basically means that the migration is successful. Recall that when you transplant a new BSP or chip, how do you verify whether the transplantation is successful? Yes, there is a wave of RTT logo information in the MSH console window. Whether novices who have just come into contact with RT thread or experienced Daniel, when they use RT thread, the most frequently and widely used peripherals must be serial devices. This article was originally published by 123 RT thread forum users: … Guide for use analysis and troubleshooting of RTT serial port V1 Version (I) sketch
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