TW460837B - Device and method for downloading the digital signal processor code - Google Patents

Abstract

It is a device for downloading the digital signal processor (DSP) code, which is used to download the DSP code from the rewritable read only memory (ROM) into the buffer memory. The device for downloading the DSP code includes a rewritable ROM reader for downloading the DSP code form the above-mentioned rewritable ROM, a download procedural controller connected to the rewritable ROM reader, and a buffer memory reader connected to the download procedural controller for accessing the buffer memory.

Description

& 6083 7 Fifth, description of the invention (1) The present invention relates to a digital signal processor (D i gi ta 1 Signal Processor, hereinafter referred to as DSP) device and method for downloading (code) code (download) In particular, the invention relates to a method for downloading from a rewritable read-only flash memory through a DSP code download device to a DSP memory for ten years to a temporary memory storing the DSP code. FIG. 1 is a structural diagram illustrating a conventional D s p unit in a control chip. Generally, the DSP unit in the control chip is used to process faster digital signal processing, such as mathematical operations such as floating point operations and matrices. This can be applied to, for example, Compact Disk Read Only Memory (hereinafter referred to as CD-ROM). ) Or a digital multi-function disc (Digital Versatile t 丄 hereinafter referred to as DVD), which needs to be faster to process digital signals, such as two D ςρ Λ please refer to Figure 1, the traditional method is to control the chip 10

The DSP code required by Me is burned into the Read Only Memory (Read Only I is simply ROM) 12. After the control chip U leaves the factory, the DSP code recorded on _ 12 is processed to process this control. = Digital data of the components controlled by the daily film 10. This association is lower, but the disadvantage is that the benefits of this type of Dsp become a newer DSP into μ π. One * Program 1 has a bug or a version with a private code 'because of R 〇M12 on ,,,,, so you have to redo the control chip, and the inventory can not be struck, but = 12 !!! Defective control chip heat / £ Jia out 'and increase the cost The main purpose of the present invention is to provide a DSP program & that will be stored in a rewritable read-only memory such as a code download device.

Download the code to-temporarily save the flying object if it is randomly stored with = memory of DSP. Dagger Memory (Rarniom Face

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460837 V. Description of the invention (2)

Access Memory, RAM). In this case, when updating the Dsp code, it is only necessary to print the Dsp code stored in the rewritable read-only memory by updating, without re-making the entire control chip. In addition, according to The device and method for downloading the DSP code of the present invention use hardware circuits to complete the purpose of downloading m / code. When the power is turned on, the code is effectively transferred to the temporary memory to complete the initialization of the device. • In accordance with the purpose of the present invention, a digital signal processor (DSP) code download package is proposed to download a DSP code from a rewritable read-only memory to a 'body': this DSP The code downloading device includes: a rewritable read-only memory reader for downloading Dsp code from the rewritable read-only memory, downloading a program controller, and connecting to the rewritable read-only memory to read Fetcher; temporary memory accessor connected to the download program controller to access the memory. Towel M has another purpose of temporarily storing a W Ϊ ^ ί Ϊ f, and proposes a control chip connected to the number: f H read memory 'stomach can overwrite read-only memory storage-digital carcass, connected to the DSP; And a DSP code to save the memory and recall the DSP code to the temporary memory ^ 1 Download according to the re-invention of Feng Feng, (digital signal such as a digital signal processor using the following 鄱 Sor 'DSP) code below The starting address and length of the planting code of the Fang Muchuan mine; then, take the two 4 formulas

460837 V. Description of the invention (3) Download_decrypt. Calculate the checksum (readsum); then, read the DSP code after it has been downloaded and encrypted, and calculate a write check " Value, and finally 'store the read check value and write check value. In order to make the above-mentioned objects, features, and advantages of the present invention more obvious and easy to understand, "a better understanding" is given below in conjunction with the accompanying drawings, which are described in detail as follows: Brief description of the drawings: Figure 1 A block diagram showing the structure of a conventional DSP in a control chip. FIG. 2 is a block diagram showing a system structure of a d S P code download device according to a preferred embodiment of the present invention. Fig. 3 is a block diagram showing the structure of the DSP code download device shown in Fig. 2. FIG. 4 shows a flowchart of a method for downloading DSP code according to a preferred embodiment of the present invention. FIG. 5 is a block diagram showing the structure of another example of a device for downloading a DS code according to a preferred embodiment of the present invention. Label description:

10, 2 0 0: Control chip 12: ROM

14 '220: DSP 210: RAM 23 0, 23 0: Flash memory 240, 240: DSP code download device 310: Download program controller 3 2 0: RAM reader 3 3 0: Flash memory read Fetcher

460837 V. Description of the invention (4) A preferred embodiment. Example 1 Please refer to FIG. 2, which shows a digital signal processor (D i .gita 1 S, i gnal Processor) according to a preferred embodiment of the present invention. , DSP) ~ The structure diagram of the code download device system. As shown in the figure, the system for downloading the DSP code includes a control chip 2000 and a flash ROM 230 ′ connected to the control chip 200. The control chip 200 includes a DSP 220 and a RAM 210 connected to the DSP 22 0 and a DSP code download device 240 ′ connected to the DSP 2 2 0. The flash memory billion body 230 is used to store the data required by the control chip 2000. These data include the DSP code required by the DSP 220, and the DSP code is stored in the flash memory by means of fncryption. On the memory 23 to increase the security and confidentiality of Dsp code storage. In addition, the data stored on the fast 2 3 j even includes an index and a test stored at a fixed address. ^ The index is Store the starting address and length of the Dsp code, and the test value is to check whether there is 210 * ^ c ^ r〇m \ dvd during the download process. Let DSP 29Γ store the memory from the quick access memory 23 ( ) The downloaded code, the device's digits can be processed using the coffee code stored in RAM 2 1 °

220 Ϊ ^ ^ ^ ^ t ^ ^ T mDSP is a DSP code that is not loaded on 210, and this hardware circuit is the structure of the code download shown in Figure 2 and shown in Figure 2.

4 6083 7 V. Description of the invention (5) Block diagram, so for the same structure, as shown by j „, the DSP code download uses the same reference numerals. As shown in Figure 3, a RAM accessor 32 〇 ^ Q includes ^ A small program controller-such as a CD-ROM or DVD when it starts up, and a memory reader 330. When it is set up, it is first activated by the DSP code #: 氕 氕 式 Λ download device 24. That is Kai 3 1 0 reads the address and length of the program controller g 7 via flash memory. Then, § is stored in the initial position of flash memory 230: Captain ί The winner downloads the program controller 310, which is the root. Shanghai thumbs up the information to control the entire downloading program. And the flash memory reads the data from the code and calls it PU ... 'Two take two and the process will be equal to the reading check: value, this reading check value is Is there an error in the process of using Chengma? RnRAM access 2 = DSP program read from flash memory 2 3 0 and decrypted Dsp d 乂 It is recommended that the program written by '220 read into RAM 210 In the process, whether there is an error. 疋 It is used to verify that it is written in + 2 ΐ The fourth Λ, a flowchart illustrating the method of downloading the DSP code. 3 = Medium 'First Get the start address and length of the DSP code. In the next step, it is controlled by the downloading process of Figure 3: The start address of the DSP code in the index stored in the memory 2 3 0 and Long 'J: Read the DS to be downloaded via flash memory reader 33〇; program

^ 80837 V. Description of the invention (61 ^ ^ ~: ---- Jing Di H in step 42, download the DSP code, decrypt it and calculate ί =. This step is the download program controller in Figure 3. 31 〇1 Select the starting address of the DSP code to be downloaded and the length of the DSP program to control the entire process of downloading the Dsp code. During the DSP program, it will rely on the flash in Figure 3. On the memory 230, the code is read from the flash memory 3 3 0 in FIG. 3 by the d SP code on the flash «• hidden body 2 3 0 and decrypted, and then passed through R Α μ The accessor 32 0 stores the DSP program code on the RAM 210 in the second figure via the DSP > 22 0, and also calculates the read check value as a check to read from the flash memory 2 30 Check whether there is an error in the process of the DSP code. In step 44 'read the downloaded DSP code and calculate the write check.

value. In this step, the decrypted Dsp code stored in the RAM 21 in FIG. 2 is read out by the RAM reader 3 2 0 in FIG. 3 via the DSP 220 and then written into the memory. The check value is used to check whether an error occurred during the process of storing the decrypted DSp code in the RAM 21 in FIG. 2. Finally, in step 46, the read verification value and the write verification value are stored, and ^ is used for initialization verification, that is, the download process of the entire Dsp code is completed. In this step, as shown in FIG. 3 Originally, the check value of the DSP code was stored on the flash memory 2 30. This check value was also written into the RAM 21 0 in the second figure in step 42. Compare the calculated reading check value to find out whether an error occurred during the process of reading and decrypting the Dsp code from the fast memory 230. On the other hand, the 'check-check value' and the one calculated in step 44;

4 β Ο 8 3 * 7 I. V. Description of the invention (You can check whether the error occurred during the process of writing the decrypted DSP code into the RAM 210 in Figure 2 by comparing the input check value. If there is any An error occurs, that is, the initialization fails. If no error occurs, the initialization j) Sp 2 2 0 is successful, and the DSP 22 0 can start borrowing the DSP code in Ram 21 0 to operate. Example 2 Please refer to FIG. 5 'to explain another example of a device for downloading a Dsp program code according to a preferred embodiment of the present invention. As shown in the figure, the system of the DSP code downloading device includes a control chip 500 and a flash ROM 530 connected to the control chip 500. The control chip 500 includes a RAM 510 and a DSP 5200, which are connected to the RAM 510, a DSP code download device 54o, and directly connected to the RAM 51o. The flash memory 53 0 is used to store the data required by the control chip 500. These are the DSP code required for the DSP 52 0, and the Dsp program is stored in the flash memory 5. On 30, the security and confidentiality of the code stored with ί plus DSP. Note: According to the second embodiment of the preferred embodiment of the present invention, the Dsp downloading device 540 is directly connected to the RAM 51. This is different from the example-the function of the downloaded msp is' It is the same as the first example, so it is not important here to represent each block [invention effect] The device for downloading the code and the above-mentioned embodiment of the present invention and the disclosed DSp process

4 6 0 83 7 V. Description of the invention (8) — method, using overwritable read-only memory, such as the code of fast DSP, when each female device is started, the body is stored ^ ώ ινςρ 入 入 Ρ Also prepare to start the method of downloading from the hardware circuit 'The DSP code download device will store the downloadable DSP code to the device's control chip'-C memory and encrypt it The way to ensure that the Dsp code is kept confidential when reading the memory is overwritable only. According to the present invention's method for downloading a program using the DSP code, when the DSP has a newer version of the code download and errors, a new private code version is required, or the DSP code is ancient. When the DSP code is wider, you can save the cost by updating the update of Yuki T stored in flash memory. However, it is not that the invention of 2 π Ϊ f f has been disclosed as the above-mentioned preferred embodiment. The spirit and g of the present invention are obvious to anyone who is familiar with the art without departing from the standard. Wai * is defined as the scope of the attached patent application as defined below

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Claims (1)

4 6083 7 VI. Scope of patent application 1. — A kind of digital signal processor (DSP) code downloading device for — ί: i tdsp · code to-the second memory, the Dsp code °; installation process, first code, memory reader, used to download the and a download program controller from the first memory, connected to the first memory reader; u 2 memory The memory accesser is connected to the downloading program to suppress $, H to access the second memory. Call the controller, use, 2 of which, as described in Λ please patent / circle the first DSP program to download and install the starting address and length of the code. I do n’t know if the DSP is 3 ^ under the DSp code described in item 1 of the patent application scope 4 if the application is: the direct memory also stores a checksum. The downloading and installation of the DSP code described in item 1 of the first Mingzhu H. The "卩 code" stored in the first memory is encrypted and processed, and the first memory system can be overwritten by downloading and downloading the DSP program stone horse as described in Fang Shenzhen's patent scope item 1. Write read-only memory. Jin Gan downloads and installs the DSP code as described in item 1 of the scope of the patent application, where the first memory system is a flash memory. It is set as the DSp program as described in the scope of patent application. Code to download and load the second memory-is a random access memory ("the teacher 460837 VI. Patent application scope (Access Memory, RAM) 〇 8. A control chip connected to a first memory, the first memory stores a digital signal processor (DSP) code, the control chip It includes: a digital signal processor (DSP); a second memory connected to the DSP; and a DSP code download device for downloading the DSP code to the second memory. 9. The control chip according to item 8 of the scope of the patent application, wherein the DSP code download device includes: a first memory reader for downloading the DSP program from the first memory; a download program A controller connected to the first memory reader; and a second memory accessor connected to the download program controller for accessing the second memory. 10. The control chip according to item 9 of the scope of patent application, wherein the second memory accessor directly accesses the second memory. 11. The control chip according to item 9 of the scope of patent application, wherein the second memory accessor accesses the second memory via the DSP. 12. The control chip as described in item 8 of the scope of patent application, wherein the data stored in the first memory further includes an indicator for storing the start address and length of the DSP code. 13. As described in the application of the control chip in item 8 of the patent C, the _ Page 13 4 6 0 83 7 Order Year & Month Correction / Correction / F6. Stored in the first memory of the patent application Fanyuan + 14. As in == < The data includes a checksum. ° The control chip described in item 8 of the first memory f patent scope, wherein let 15. 'If the DSP code is stored, it is encrypted. (1) Memory: The control chip described in item 8 of the patent scope, H. ’as described in the second T overwrite read-only memory. The first note is that the control chip described in item 8 of the patent scope, iV !: "Quick Flash Memory #. The control chip described in item 8 of the second memory system range, Processor is a processor (DiSital si_l A method for downloading a code download device from a first code to use a memory. The method includes the following J:: loading the -DSP code to -degree; a. Obtaining the DSp program from the first memory The starting address of the code and the long length are stored in the first-memory 19. If the scope of the patent application is flute! 8 words new, ten, evening ηςρ strokes, ... Sincerely; ^ stored in the 20. It drink and plant Among them, among which the DSP program has the second record i i unknown change L L ia item escape code-I party yan Yan Guang t step 13, including decrypting the DSP code and calculating Checksum. Different | year 21. If the DSP code described in item 19 of the patent application scope is W, whether it is allowed or not, η wins the day II 〇 of ** Read Page 14 460837 6. Method for applying for a patent, which further includes the following steps: c. Read the DSP code that has been decrypted and downloaded to the second memory, and calculate a write check value; and d. The read verification value and the write verification value are stored in the second memory. Page 15