UFC911B106 3BHE037864R0106 3BHE037865P201 | ABB | programming optimization module

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UFC911B106 3BHE037864R0106 3BHE037865P201 | ABB | programming optimization module

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Embedded UFC911B106  is divided into two parts: algorithmic optimization and programming optimization. The optimization in programming can be divided into the following techniques:
·Optimization of memory usage – cache usage
Cache involves cache hit rate, cache consistency, write back, write through, etc. Global variable problem, common variable position problem, interlock problem.
·Parallel optimization
Parallel UFC911B106  mainly refers to the application of SIMT or SIMD technology, including the use of GPUs, NEON optimization, SSE optimization, etc. Parallelism can be divided into task parallelism and data parallelism, and task parallelism is the advantage of multi-core. Data parallelism is solved by GPU and NEON.
·Dependency issues

The dependency problem is mainly a pipeline problem, which can be efficiently used to avoid data dependencies. As for the optimization of this part, disassembly should be used to compare the differences caused by different writing methods.
5. Embedded drive cannot be bypassed
Many people have a technical plot for driver development, and the younger the engineer, the more so. The development of drivers is essentially configuring parameters for peripherals to work in the desired way. Driver development under Linux needs to follow the Linux driver framework, and bare metal driver development can simply configure registers.
Linux has a great philosophy that everything is a file. Linux abstracts peripherals into files, and there is no difference in operation between reading and writing peripherals and reading and writing files. Devices under Linux are divided into character devices, block devices, and network devices.

When registering drivers under Linux, device numbers and file names are mapped, and some functions in file_operation are implemented, such as write, read, and ioctl. Write and read are mainly used to read and write useful data from peripherals. Ioctl is mainly used to configure some parameters of peripherals to work in different modes or states.
6. Embedded UFC911B106  cannot do without operating systems
There are many types of embedded operating systems: vxworks, ucos, freertos, bios, Linux, ucLinux, nuttx, and so on. I personally feel that the choice of operating system depends on real-time performance and ecology. Ecology is very important, so when problems arise, we don’t feel hopeless and don’t feel like we’re fighting alone.
In fact, the emergence of operating systems is mainly to solve task scheduling and memory management, which are the essence of operating systems. If you are interested, you can read the source code. There are not many UCOS source codes, so you can start by looking at them.

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