CN105094886A - Device and method for burning serial number to lower computer containing RS (Recommended Standard) 485 bus from PC (Personal Computer) machine - Google Patents

The invention provides a device and a method for burning a serial number to a lower computer containing an RS (Recommended Standard) 485 bus from a PC (Personal Computer). The device comprises the PC, a burner and a lower computer, wherein the PC is provided with a burning unit and a USB (Universal Serial Bus) port; the burner comprises a USB/UART (Universal Asynchronous Receiver/Transmitter) conversion unit, a checkout unit and a first UART/RS485 conversion unit, wherein the USB/UART conversion unit, the checkout unit and the first UART/RS485 conversion unit are successively connected; the USB/UART conversion unit of the burner is connected with the USB port of the PC through a USB bus; the lower computer comprises a second UART/RS485 conversion unit and a serial number read-write unit with an I2C (Inter-Integrated Circuit) interface, wherein the UART/RS485 conversion unit and the serial number read-write unit are mutually connected; the second UART/RS485 conversion unit of the lower computer is connected with the first UART/RS485 conversion unit of the burner through the RS485 bus; and the I2C interface of the serial number read-write unit is connected with an EEPROM (Electrically Erasable Programmable Read-Only Memory) through an I2C bus. The device can burn the serial number to the lower computer containing the RS485 bus to the PC and can effectively verify whether burning is successful or not since the device is provided with a checkout program.

A kind of from PC burning sequence number to the apparatus and method of the slave computer containing RS485 bus

Technical field

The invention belongs to burning program technical field, be specifically related to a kind of from PC burning sequence number to the apparatus and method of the slave computer containing RS485 bus.

Background technology

For storage class semiconductor components and devices, usually need to utilize computing machine, by serial, parallel or USB connects and the program that certain tool of arranging in pairs or groups will be write writes, and the tool used in this process is exactly CD writers or is programmable device.Such as adopt the electronic product of RS485 bus then directly can not pass through the USB port of PC directly to the electronic product burning sequence number adopting RS485 bus, because RS485 bus cannot directly communicate with the usb bus of PC, how directly could pass through the USB port of PC to the electronic product burning sequence number adopting RS485 bus, become a urgent problem.

Summary of the invention

The present invention is directed to PC directly to the problem of the slave computer burning program containing RS485 bus, to provide a kind of from PC burning sequence number to the device of the slave computer containing RS485 bus, comprising:

PC, is provided with burning unit and USB port;

Cd-rom recorder, comprise the USB/UART converting unit, verification unit and the UART/RS485 converting unit that connect successively, the USB/UART converting unit of cd-rom recorder is connected with the USB port of PC by usb bus;

Slave computer, comprise interconnective 2nd UART/RS485 converting unit and the sequence number read-write cell with I2C interface, 2nd UART/RS485 converting unit of slave computer is connected with a UART/RS485 converting unit of cd-rom recorder by RS485 bus, and the I2C interface of sequence number read-write cell is connected with EEPROM by I2C bus.

Preferably, described USB/UART converting unit adopts USB/UART conversion chip, verification unit adopts single-chip microcomputer, one UART/RS485 converting unit adopts UART/RS485 conversion chip, the UART signal that USB/UART conversion chip exports verifies through single-chip microcomputer, meet agreed specifications, be forwarded to UART/RS485 conversion chip.

Further preferably, described USB/UART converting unit adopts CP2102, and a UART/RS485 converting unit adopts MAX3485.

Preferably, the 2nd UART/RS485 converting unit adopts UART/RS485 conversion chip, and sequence number read-write cell adopts single-chip microcomputer.

Further preferably, the 2nd described UART/RS485 converting unit adopts MAX3485.

In order to solve the problem, the present invention also provides a kind of from PC burning sequence number to the method for the slave computer containing RS485 bus, and the method comprises burning program, and concrete steps are:

The sequence number of pre-burning imports in burning unit by PC;

Sequence number is transferred to the USB/UART converting unit of cd-rom recorder by burning unit in the mode of usb signal by usb bus from USB port;

USB/UART converting unit is sent to verification unit after converting usb signal to UART signal; Verification unit receives the UART signal of USB/UART converting unit, verification, the UART signal meeting agreed specifications is forwarded to a UART/RS485 converting unit, and converts RS485 signal to, then passes through the two UART/RS485 converting unit of RS485 bus transfer to slave computer; The UART signal not meeting agreed specifications does not then forward, and verification unit continues the next UART signal of wait-receiving mode;

2nd UART/RS485 converting unit is sent to sequence number read-write cell after converting RS485 signal to UART signal, and sequence number read-write cell passes through I2C bus to EEPROM writing sequence number.

The method also comprises check program, and concrete steps are:

Sequence number read-write cell reads the sequence number of EEPROM write by I2C bus, and being sent to the 2nd UART/RS485 converting unit with the form of UART signal, the 2nd UART/RS485 converting unit is back to a UART/RS485 converting unit of cd-rom recorder after converting UART signal to RS485 signal;

One UART/RS485 converting unit of cd-rom recorder is forwarded to USB/UART converting unit through verification unit after just RS485 signal converts UART signal to, and USB/UART converting unit is back to the burning unit of PC after converting UART signal to usb signal;

The sequence number of passback and the sequence number sent verify by burning unit, data consistent, display burning success; Data are inconsistent, and display burning failure also points out burning again.

Owing to have employed technique scheme, the invention has the beneficial effects as follows:

Of the present invention a kind of from PC burning sequence number to the apparatus and method of the slave computer containing RS485 bus, can not only realize from PC to the slave computer burning program containing RS485 bus, checking procedure is provided with during burning program, can judge that whether sequence number is legal, whether the sequence number not meeting agreed specifications then can not be entered slave computer by burning, can also feed back in time after burning completes, number correct by the burning unit verification sequence of PC, make burning success ratio high, there will not be the phenomenon of omission.

Accompanying drawing explanation

Fig. 1 is of the present invention from PC burning sequence number to the apparatus structure block diagram of the slave computer containing RS485 bus.

Fig. 2 is of the present invention from PC burning sequence number to the burning program process flow diagram of method of the slave computer containing RS485 bus.

Fig. 3 is of the present invention from PC burning sequence number to the check program process flow diagram of method of the slave computer containing RS485 bus.

Reference numeral: 10-PC machine, 11-burning unit, 12-USB port, 20-USB bus, 30-cd-rom recorder, 31-USB/UART converting unit, 32-verification unit, 33-the one UART/RS485 converting unit, 40-RS485 bus, 50-slave computer, 51-the 2nd UART/RS485 converting unit, 52-sequence number read-write cell, 53-EEPROM.

Embodiment

With reference to Fig. 1, of the present invention a kind of from PC burning sequence number to the device of the slave computer containing RS485 bus, comprise PC 10, cd-rom recorder 30 and slave computer 50.Be provided with burning unit 11 and USB port 12 in PC 10, burning unit 11 is that a writable program obtains burn recording software.Cd-rom recorder 30 comprises the USB/UART converting unit 31, verification unit 32 and the UART/RS485 converting unit 33 that connect successively, and the USB/UART converting unit 31 of cd-rom recorder 30 is connected with the USB port 12 of PC 10 by usb bus 20.USB/UART converting unit 31 adopts USB/UART conversion chip, specifically CP2102 can be adopted, verification unit 32 adopts single-chip microcomputer, one UART/RS485 converting unit 33 adopts UART/RS485 conversion chip, specifically can adopt MAX3485, and the UART signal that USB/UART conversion chip exports verifies through single-chip microcomputer, meet agreed specifications, be forwarded to UART/RS485 conversion chip, do not meet predetermined specifications, then continue to wait for next instruction.

Slave computer 50 comprises interconnective 2nd UART/RS485 converting unit 51 and has the sequence number read-write cell 52 of I2C interface, 2nd UART/RS485 converting unit 51 of slave computer 50 is connected with a UART/RS485 converting unit 33 of cd-rom recorder 30 by RS485 bus 40, and the I2C interface of sequence number read-write cell 52 is connected with EEPROM53 by I2C bus.2nd UART/RS485 converting unit 51 adopts UART/RS485 conversion chip, and specifically can adopt MAX3485, sequence number read-write cell 52 adopts single-chip microcomputer.

With reference to Fig. 2, the present invention also provides a kind of from PC burning sequence number to the method for the slave computer containing RS485 bus, and the method comprises burning program, and concrete steps are:

The sequence number of pre-burning imports in burning unit 11 by PC 10.

Sequence number is transferred to the USB/UART converting unit 31 of cd-rom recorder 30 by burning unit 11 in the mode of usb signal by usb bus 20 from USB port 12.

USB/UART converting unit 31 is sent to verification unit 32 after converting usb signal to UART signal; Verification unit 32 receives the UART signal of USB/UART converting unit 31, verification, the UART signal meeting agreed specifications is forwarded to a UART/RS485 converting unit 33, and convert RS485 signal to, the 2nd UART/RS485 converting unit 51 of slave computer 50 is then transferred to by RS485 bus 40; The UART signal not meeting agreed specifications does not then forward, and verification unit 32 continues the next UART signal of wait-receiving mode.

2nd UART/RS485 converting unit 51 is sent to sequence number read-write cell 52 after converting RS485 signal to UART signal, and sequence number read-write cell 52 passes through I2C bus to EEPROM53 writing sequence number.

In order to check the program of burning successful, correctly whether whether, PC 10, while the order sending burning program, also returns order along with have issued.

After EEPROM53 burning sequence number, sequence number read-write cell 52 reads again the sequence number of EEPROM53 write at once by I2C bus, and the UART/RS485 converting unit 33 being back to cd-rom recorder 30 after the 2nd UART/RS485 converting unit the 51, two UART/RS485 converting unit 51 converts UART signal to RS485 signal is sent to the form of UART signal.

One UART/RS485 converting unit 33 of cd-rom recorder 30 is forwarded to through verification unit 32 the burning unit 11 being back to PC 10 after USB/UART converting unit 31, USB/UART converting unit 31 converts UART signal to usb signal after just RS485 signal converts UART signal to.

The sequence number of passback and the sequence number sent verify by burning unit 11, data consistent, display burning success; Data are inconsistent, and display burning failure also points out burning again.