“At present, the development of embedded systems is very rapid, and the development of various applications based on ARM processors is in full swing. This is mainly due to the high cost performance and short development cycle of embedded systems, and can be implemented in a variety of application systems . This article introduces a measurement and monitoring system based on Samsung’s ARM9 embedded chip S3C2410. The ARM chip is used as the main CPU to achieve AC and DC voltage and current measurements. The measurement results are stored in the local MIB database. Realize remote access monitoring through IP network protocol.
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Introduction: At present, the development of embedded systems is very rapid, and the development of various applications based on ARM processors is in full swing. This is mainly due to the high cost performance and short development cycle of embedded systems, and can be implemented in a variety of applications In the system. This article introduces a measurement and monitoring system based on Samsung’s ARM9 embedded chip S3C2410. The ARM chip is used as the main CPU to achieve AC and DC voltage and current measurements. The measurement results are stored in the local MIB database. Realize remote access monitoring through IP network protocol.
1 Overview
At present, the development of embedded systems is very rapid, and the development of various applications based on ARM processors is in full swing. This is mainly due to the high cost performance and short development cycle of embedded systems, and can be implemented in a variety of application systems . This article introduces a measurement and monitoring system based on Samsung’s ARM9 embedded chip S3C2410. The ARM chip is used as the main CPU to achieve AC and DC voltage and current measurements, local and nearby temperature measurements, and light sensitivity measurements. The measurement results are stored in the local MIB database, and remote access monitoring is realized through the IP network protocol. The system design scheme is advanced, the integration level is high, and it has been widely used in practice.
2. Introduction to Embedded ARM9 S3C2410X
S3C2410X is a 32-bit RISC processor based on ARM920T core provided by Samsung. Its low power consumption, low price, high performance design is especially suitable for handheld devices and general embedded applications. In order to reduce the cost of the entire system, it provides Abundant internal devices, including separate 16KB instruction Cache and 16KB data Cache, MMU virtual memory management, maximum 16M color TFT LCD controller in 24bbp mode, system manager supporting NAND Flash system boot, chip selection logic and dram controller, 3-channel UART, 4-channel DMA, 4-channel PWM timer, 117 general-purpose IO ports and 24-channel external interrupt source, RTC with calendar function, 8-channel 10-bit ADC and touch screen interface, IIC, IIS interface, USB master and slave device , SD&MMC card interface, 2-channel SPI and PLL clock multiplier. It uses the AMBA new microcontroller bus structure, which greatly improves the transmission speed of data and instructions. Its enhanced ARM architecture MMU can be used for the porting of operating systems such as WinCE and Linux, and supports a variety of low-cost, large-capacity NOR/NAND Flash or EEPROM boot. The highest operating frequency reaches 266MHz and is based on a small package 272FBGA. The ARM core has a standard JTAG structure, which provides a convenient debugging tool for application system development. At present, there are many general development tools on the market that can be used for debugging and development of S3C2410X.
Because S3C2410X has a wealth of interfaces and embedded hardware controllers, most of the functions of the application system can be realized by using its simplest system. The simplest system is shown in Figure 1, which only includes S3C2410X ARM9 chip, 32-bit sdram, and low-cost large-capacity Nand Flash. In order to realize the communication between the serial port and the network port, it is necessary to increase the serial port level conversion chip MAX232 and the network MAC and PHY chip DM9000 (or LAN9115). Other modules in the system are used to realize various parameter measurement and sensing functions.
3. Embedded measurement and monitoring system design
This system needs to measure, collect and store the parameters of the voltage, current or temperature, illuminance, etc. of the equipment under test, such as power equipment or solar energy, and realize remote monitoring. The data storage format is SNMP MIB database. The database can be accessed and accessed by the remote operator’s SNMP control platform through the system’s NMP agent. The transmission protocol is the IP protocol of Ethernet. Information can be displayed by local operations at the same time, so the local serial interface is attached. Based on the above application requirements, the system block diagram is shown in Figure 1 below.
This system needs to collect remote and local temperature detection, one illuminance detection, three DC 8-130V voltage detection, three DC DC [email protected]
