How to replace the single chip microcomputer, and how to replace the string in the C language microc

Hello, the Mitsubishi microcontroller you mentioned should have long belonged to a part of Renesas microcontroller, and those models that started with M in Renesas microcontroller were inherited from Mitsubishi, but I didn't find the M37531M4FP you said, I only found the M37534M4-FP, I don't know if only the capacity is different, anyway, the attached picture is for your reference. If you need the full manual, please download it from the official link below**.

I think it's a bit difficult to replace the one you mentioned,The encryption of the Japanese single-chip microcomputer is relatively strong,It's not easy to read the original**,Unless you have fully mastered the timing behavior of the original single-chip microcomputer,If there is a way, welcome to advise。

Can be replaced with patches.

51 MCU is a collective term for all MCUs compatible with the Intel 8031 command system. The ancestor of this series of single-chip microcomputer is Intel's 8031 single-chip microcomputer, and later with the development of flash ROM technology, 8031 single-chip microcomputer has made great progress, becoming one of the most widely used 8-bit single-chip microcomputer, its representative model is ATMEL's AT89 series, which is widely used in industrial measurement and control systems. Many companies have launched compatible models of the 51 series, which will have a large market for a long time to come.

51 single-chip microcomputer is a basic entry single-chip microcomputer, or the most widely used one. It should be noted that the 52 series microcontrollers generally do not have self-programming capabilities.

According to the pin function, you can change any single-chip microcomputer.

It's easy to replace, how can you get the ** inside???

It can be used with sscanf and sprintf.

First, define a string of cache sender numbers.

char no[3];

sscanf(str_get, "set %s ", no);

After executing this sentence, it is in no"02"

then char str rec buf[20];

This is used to generate commands.

sprintf(str_rec_buf, "rec %s %d", no, str_len);

Then str rec buf is all you need.

But str len is not 3 as you say, but strlen(str get) = 9

If you want to calculate the length of 678, then you need to take this out as well.

Do you want to change to this model or 51 cores to a more xx bull? I don't understand the problem!

Replace with a pin-compatible microcontroller.

There are many 32-bit ARM cores (STM32, TI 430 series, etc.), and many ready-made development boards with monitors and touch screens are sold.

W77E058, W77E516, DS89C450 can all be replaced, of course, DS89C450 is the best.

Wouldn't you buy it without it? **There are more sold on it.。。。 7 yuan a piece...

Using the 232 port of the PC, through 232 to 485, the 485 bus is provided to connect with multiple lower computers or PLCs.

There are a lot of ready-made industrial control software modules available on the PC.

If you want to use the PC to directly replace the PLC, then you need a data acquisition card, and more analog and switching quantities for collection; If control is also required, then a component that can output signals such as PWM is also required.

There is a PCI board plus a virtual instrument for the desktop. There is a serial port 232 or 485 plus a bit computer vc++. There are also network cards plus host VC++, or board cards plus configuration king, wincc, etc.

There are many kinds depending on which one you choose, consider speed, reliability, **, etc.

The computer is best used if it is running in a complex industrial environment.

How complicated is the calculation of industrial control?

PLC is a product built on a single-chip microcomputer, which is an integrated circuit, and the two are not comparable.

MCU can constitute a variety of application systems, from micro, small to medium, large, PLC is a special case of single-chip microcomputer application system.

PLCs of different manufacturers have the same working principle, similar functions and indicators, have a certain interchangeability, quality, and programming software is moving towards standardization. This is the basis for the widespread use of PLCs. The single-chip microcomputer application system is the eight immortals across the sea, each showing its own magical powers, the function is very different, the quality is uneven, and it is difficult to learn, use and maintain.

In some cases, the single-chip microcomputer can replace the PLC, the IO port of the single-chip microcomputer plus the optocoupler can constitute the input of the switch, the IO port plus the relay or transistor constitutes the output, and the program constitutes the PLC. Moreover, it has a cost advantage in places with large quantities, but it requires certain R&D capabilities. However, small PLCs have no advantage in large quantities due to their high usage, and are generally used in large systems or places with small usage.

Take a look at ** to know if it's okay, and you have to see what specific functions are implemented.