Data transmission method for motor CPU (Central Processing Unit) and display control CPU of numerical control cutter
A data transmission method and display control technology, applied in the direction of digital control, electrical program control, electrical digital data processing, etc., can solve the problems of slow transmission speed, difficult equipment high-speed data transmission, etc., and achieve the effect of meeting the requirements of high-speed cutting
Active Publication Date: 2015-07-08
GUANGDONG RUIZHOU TECH
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Problems solved by technology
[0005] Because the highest interpolation frequency of CPU2 is about 250K, that is, the pulse period is about 4μS. If CPU2 interpolates at the highest frequency and sends data at the same time, CPU2 interpolates and at the same time sends a pulse greater than 1.5μS within half the pulse period (2μS). ST pulse is difficult to achieve, that is, only one ST data can be sent within 4μS, the transmission speed is slow, and it is difficult to meet the requirements of high-speed data transmission of equipment
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[0011] The present technology will be further described below with reference to the accompanying drawings.
[0012] In the data transmission method of the numerical control cutting machine motor CPU and the display control CPU of this embodiment, the motor CPU and the display control CPU are connected by a first XOR gate and a second XOR gate, and the 0-27FH of the dual-port RAM-IDT71V321 is connected. As the data area of CPU1 to CPU2, transfer 280H to 3AFH CPU2 to the data area of CPU2, after power-on initialization, the y=0 of the XOR gate, when CPU1 has data to CPU2, write the data to 0-27FH, in 3B0H and 3B1H write the data length of this transmission, and negate the input terminal a of the XOR gate, then y=1, CPU2 reads y=1, immediately reads the 3B0H data length, and starts to read the required data from 0 , after reading the data, the input b, y of the XOR gate is negated, and y = 0, so that both parties only need to execute 3 instructions to send and receive data, a...
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Provided are a data transmission method and a data transmission system, so as to transmit data between a first CPU and a second CPU. The method comprises the following steps: presetting an initial value of an output end of a first logic gate to a high level or a low level; step S1), making the first CPU transmit data to the second CPU, storing the data in a first data storage area, storing the length of the data in a first data length storage area, and negating an output value of a first output end of the first CPU; step 2) the second CPU reading the data length in the first data length storage area according to the current output value of the output end of the first logic gate, and reading data corresponding to the data length in the first data storage area; and step 3) negating the output value of the first output end of the second CPU, so as to negate an output value of the output end of the first logic gate. By means of the data transmission method, high-speed data transmission can be implemented.
Description
Technical field: [0001] The invention relates to a data transmission method of a numerical control cutting machine motor CPU and a display control CPU. Background technique: [0002] The automatic control of CNC cutting machine is divided into two parts, one part is some commonly used peripherals such as external keyboard, LCD screen, memory, serial port and Ethernet. The keyboard and LCD screen are mainly used to set machine parameters (such as speed, Tool depth, etc.) and display the running status of the machine. The memory includes FLASH memory and SRAM memory. The FLASH memory mainly stores the parameters of the machine and some commonly used data, and the SRAM memory mainly stores the pattern data sent from the PC. The above devices are connected in series through CPU1 Realized, the PC communicates with the CPU1 through the Ethernet control chip or through the serial port [0003] The motion control, that is to control the rotation of each motor, is controlled by CPU2...
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IPC IPC(8): G05B19/414
CPCG05B19/408G06F13/4269G06F13/1663G05B19/0421G05B2219/31418G05B2219/2224
Inventor 秦少锋郭华忠
Owner GUANGDONG RUIZHOU TECH