CN1661327A - Car borne geo information collector - Google Patents

The structure of an embodiment of the vehicle-mounted geographical information collection device of the present invention sees also Fig. 1.This vehicle-mounted geographical information collection device is directly installed in the automobile and by the automobile power supply, it comprises a microprocessor 1, an external data memory 2, a satellite positioning receiver 3, serial

4 as the communication interface converter, gather voice and be converted to digitally coded

5 for one, the switch 6 of a control voice collecting, one prevents that microprocessor 1 from entering the house dog 7 of endless loop, the

8 of a dc voltage conversion, the bi-colour LED 9 of an expression GPS acquisition state and expression are in the

10 of voice collecting.

Microprocessor 1 adopts 16 single-

11 of enhancement mode with 4 serial ports as central processing unit (CPU), and the ROM (read-only memory) of depositing

12 of configuration expansion and deposit the

13 of program run data is responsible for the processing computing of program.Procedure stores ROM (read-only memory) 12 adopts the Nor type FLASH storer of 4Mb capacity, and its Enable Pin connects first sheet choosing end CS0 of single-

11, the corresponding address/data lines A0-18 end that connects single-

11 of its address/data lines; Datarams

13 is to adopt the SRAM of 1Mb capacity, and its Enable Pin connects second sheet choosing end CS1 of single-

11, the corresponding address/data lines A0-16 end that connects single-

11 of its address/data lines.Two output terminals of the control I/O mouth of single-

11 connect bi-colour LED 9, and other has an output terminal to connect

10.

External data memory 2 is the high-capacity and high-speed flash memory Nand type Flash storer of 1Gb.Its input/output end port connects the I/O serial ports of single-

11.

The

31 of satellite positioning receiver 3 and

32 are the outsourcing standard component.

32 is placed on the position such as the automobile top that can directly face toward the sky receiving satellite signal; 31 of GPS modules are placed in the main frame, and its input/output end port connects first asynchronous serial port UART0 of single-

11.

Input/output end port in 4 pairs of the serial ports conversion chips connects second asynchronous serial port UART1 of single-

11, and external input/output end port can connect outer computer with rs-232 standard.

5 is made up of a voice coding module 51, microphone 52, a

53 and loudspeaker 54.Voice coding module 51 is accepted the analog voice signal that

52 gathers and is converted into digitally coded data to send single-

11 to through the 3rd asynchronous serial port UART2 of single-

11 and handle.Voice coding module 51 can also be decoded to the 3rd data that asynchronous serial port UART2 sends of single-

11, after converting simulating signal to and sending

53 to amplify, is play by

54.

Switch 6 is a toggle switch, its end ground connection, and the other end meets an input end INT0 of the control I/O mouth of single-

11.

The input end of house dog 7 connects the removing output terminal GSOUT of single-

11, and output terminal connects the RESET input of single-

11.

8 is that the DC voltage of 5V is to each above-mentioned parts power supply with the 12V direct supply voltage transformation of automobile.

Introduce the main software structure flow process of single-

11 operations below.The whole software system is an AM/BAM system, system all operates in background state under the idle condition, when interrupting arriving, system just jumps to the foreground, judge interrupt vector, jump to corresponding Interrupt Process subroutine then and carry out, after Interrupt Process was finished, system jumped back to the background state operation again.

Serial communication is the task of the bottom, to the application of

31 and voice coding module 51 and and host computer between communication all realize by serial ports.The serial ports of single-

11 interrupts dividing two kinds: receive and interrupt and send interrupting, both are independently, but can a shared Interrupt Process function.

The single-

11 that present embodiment adopted supports serial data to receive dma mode, serial port setting DMA working method, the buffer memory size and the overtime upper limit that serial ports DMA receives are set, serial ports DMA are set receive the interrupt handling routine inlet, serial ports is set sends the interrupt handling routine inlet.Because each serial ports all is independently, therefore must handle respectively each serial ports, when serial ports is received data or will be sent data, will jump to corresponding interrupt handling routine and carry out.

After the serial port setting DMA working method, when the data that certain serial ports receives arrive, data are transplanted in the DMA buffer zone of this serial ports at once, triggering a DMA interrupt notification single-

11 when data volume reaches buffer size fetches data, perhaps the overtime upper limit triggers the data that DMA interrupt notification single-

11 is got in the DMA buffer zone, can prevent loss of data like this.Transmission is data from a byte to the serial ports output register of single-

11 that write, and transmission can be controlled voluntarily, waits a byte to send to finish and sends next byte again, can not produce the phenomenon of covering.

Step 503, the data that this serial ports is received are written in the DMA buffer zone, whether the DMA buffer zone can meet the full or overtime upper limit of its down trigger condition DMA buffer zone that is provided with in advance according to the data received is given birth to DMA from movable property and interrupts, and notice single-

11 sends the data processing software interrupt request of this serial ports.Forward step 507 then to.

800, the DMA of first serial ports UART0 interrupts arriving, the beginning Interrupt Process.

Step 803 judges whether the data significance bit in this frame gps data is " A ", represents during for " A " that

31 located success, these frame data are effective,

804 to, the control I/O mouth of single-

11 is sent out gating pulse, makes bi-colour LED 9 flickers green; If the data significance bit is then represented

31 no-fix still for " V ", these frame data are invalid,

807 to.

807, the control I/O mouth of single-

11 is sent out gating pulse, makes bi-colour LED 9 flash red.

808, the end interrupt operation turns back to the background program operation.

The voice coding module 51 that present embodiment adopts is XF2S01E voice modules that the University of Science and Technology news fly company, and it has four kinds of duties: free time, coding, decoding, phonetic synthesis.We are provided with a module status unit and represent current module status, as: 1 expression is idle, 2 presentation codes, 3 expression decodings, 4 expression phonetic syntheses.As, when encoding the module status unit being changed to encoding state, the end-of-encode postposition is an idle condition.A global variable is set in addition: sound-type, when sending software interruption, indicate the job category that requires voice coding module 51 to operate, as: 2 expressions are encoded to the voice signal of

52, the data decode that 3 expressions are sent serial ports UART2 converts voice signal to, 4 expressions are carried out phonetic synthesis to the text data that serial ports UART2 sends, and finish the conversion of greeting and signal language.When voice coding module 51 is carried out each encoding operation, all to start an overtime timer, then stop this timer after being finished.If surpass the schedule time, then force to finish encoding operation, with the time of restriction sign point voice typing.

Step 705, send to instruct to make voice coding module 51 enter encoding state, start overtime timer, the voice signal that the

52 that the automatic collection of voice coding module 51 meetings this moment is attached thereto is transmitted, form binary coding then in real time, send to continuous serial ports UART2.

Step 706, send instruction to make voice coding module 51 enter decoded state, this moment, 51 meetings of voice coding module waited for that serial ports UART2 sends the binary data file of prescribed form here, the binary data that voice coding module 51 can provide this document in real time is converted into sound, plays out sound by the

54 that are attached thereto then.

Step 707, send instruction to make voice coding module 51 enter the phonetic synthesis state, this moment, voice coding module 51 can be sent anthropomorphic sound " hello " by the

54 that are attached thereto as long as send text data as " hello " to voice coding module 51, and this function is mainly used in voice suggestion.

Step 301 is set each I/O mouth of single-

11 by the function that illustrates previously, and the inner timer of definition.Call serial port initialization process subroutine shown in Figure 4, the asynchronous serial port UART0 that links to each other with

31 of initialization, the communication that links to each other with serial

4 are with asynchronous serial port UART1 and the asynchronous serial port UART2 that links to each other with

5 successively, the working method that they are set is the DMA working method, and the baud rate of each serial communication is set respectively.。

Step 302 is set interrupt vector and the correlated variables that the exterior storage software interruption is handled subroutine entry to external data memory 2, and open this interruption.

5 is carried out voice coding module 51 reset, set its running parameter, it is idle making current state, sets the interrupt vector that the voice module software interruption is handled subroutine entry, and open this

31 working methods, data layout, data acquisition are set at interval, set the interrupt vector of GPS module software Interrupt Process subroutine entry, and open this interruption.

Step 304, judge that the foundation whether

31 locatees is: whether the data significance bit in the last frame gps data that keeps in the current location temporary storage location of internal memory is " A ", represents during for " A " that

31 located success, these frame data are effective.This step goes to check its positioning states exactly, judges that whether GPS locatees.

Step 305 detects

31 and successfully locatees, and send control level to the control I/O mouth output terminal that connects

10,

10, and prompting operation person can carry out the speech typing.

Step 306, the longitude and the latitude data of taking-up current location from the current location temporary storage location of internal memory, the positional information of this point will form a complete monumented point packet with ensuing voice messaging.The variable sound-type is set at coded system, call the voice module software interruption and handle subroutine, make voice coding module 51 be set at coded system, by

52 typing voice in voice coding module 51, voice coding module 51 is speech conversion a binary data stream in real time, send to the 3rd asynchronous serial port UART2, so just, can trigger the DMA hardware interrupts that UART2 receives data, this DMA hardware interrupts deposits in the special data area in the internal memory leaving speech data in the DMA buffer zone in.

Step 307 to this End of Tape, changes the control level of the control I/O mouth output terminal that connects

10, extinguishes

10, and the typing of prompting operation person's speech stops, please with switch 6 open circuits.

Step 310, the data significance bit in the last frame gps data that keeps in the current location temporary storage location of internal memory are " V ", the success of

31 no-fix, and these frame data are invalid.The variable sound-type is set at the phonetic synthesis mode, call the voice module software interruption and handle subroutine, making voice coding module 51 be set at the phonetic synthesis mode works, send the success of anthropomorphic sound prompting operation

31 no-fix by

54, need wait for a moment, just can carry out the voice of monumented point and describe.

Geographical information collection device main frame is fixed on certain position in the car, power supply and ground wire respectively with automobile on the positive pole of ignition with on negative pole is connected,

32 be placed on can be directly facing to the position such as the automobile top of sky receiving satellite signal.Start up the car, then entire equipment powers on and starts working, and this moment, bi-colour LED 9 flash red and

54 broadcast voice suggestion equipment began to carry out work.

Wait for that the green expression of bi-colour LED 9 flickers GPS locates successfully, equipment can be along the trend of road, the longitude of timing extraction vehicle location and latitude data, and deposit the vehicle position data of extraction in the external data memory 2 path file.Automobile is through certain when can be used as landmark on map such as during certain mansion, press and gather switch 6,

10 bright promptings begin recording, equipment can obtain the location coordinate information of this point earlier, start the voice coding function then, the operator says about the relevent information of this building such as title etc., and

10 extinguishes the expression End of Tape then.The passengers inside the car that voice

5 is gathered are to the phonetic coding data of this geographical sign point illustration, and the monumented point file that deposits the vehicle current location data and the phonetic coding data of extraction in external data memory 2.

As much as possible all streets are run one time in certain city according to this operating process, all information that finally collect are by path file and the monumented point file of

4 in 2 storages of outer computer transmission external data memory.Upper outer computer can utilize path file and monumented point file to be shown as path locus, and the map edit producer couples together track and carries out some processing, will form an electronic chart.Behind automobile flameout, equipment also just is stopped and has powered, and can not influence automobile power source and use.