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Program updating method of single chip processor

A program upgrade and single-chip microcomputer technology, applied in the computer field, can solve problems such as cost increase, long cycle, and cost increase, and achieve the effect of reducing hardware costs and facilitating software upgrades

Inactive Publication Date: 2007-01-10
SICHUAN CHANGHONG ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this case, it is only necessary to determine whether there is an upgrade request after the MCU is powered on, and then communicate with the outside through such as I2C (or IIC, I2C). 2 C) A type of communication method to obtain new programs. The advantage of this method is that it is safe and reliable, that is, if an abnormal situation such as power failure occurs during the upgrade process, the software can still be upgraded after power on again, and there is no great risk , the disadvantage is that the program of the internal Loader part needs to be masked in advance, and the cost will increase. In addition, if the internal program needs to be changed, it needs to be re-masked, which not only takes a long time but also continues to increase the cost

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  • Program updating method of single chip processor
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  • Program updating method of single chip processor

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Embodiment Construction

[0013] Such as figure 2 , taking the rear-projection TV as an example, to realize the software upgrade, the external LOADER completes the communication between the computer and the rear-projection TV through the adapter, and the internal LOADER completes the upgrading work in the MCU.

[0014] Such as image 3 , the program upgrade includes the following steps:

[0015] a. Load the upgrade program into the external SDRAM;

[0016] b. Copy the internal LOADER to the MCU on-chip RAM;

[0017] c. Erase the original content of FLASH, and copy the upgrade program from the external SDRAM to FLASH.

[0018] Before step a, first check the existing program to determine whether it needs to be upgraded, and if so, go to step a. Before step a, read and display the existing program version information. The external computer pours the new program into the SDRAM through the IIC mode through the MCU and the decoder (DECODER), and then tests the new program in the SDRAM. If the new progr...

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Abstract

The invention discloses an approach of updating single chip machine program. It relates to computer technology, esp. single chip machine technology. Its steps are as follows: a. using outside LOADER to load program needed updating into outside SDRAM; b. copying inside LOADER to RAM inside MCU; c. erasing original data in FLASH and copying update program from outside SDRAM to FLASH. The invention can update software conveniently. It needn't open case to update software of RPTV adopting this invention. With merits of low cost and erasable program, products are more competitive.

Description

technical field [0001] The present invention relates to computer technology, in particular to single-chip microcomputer technology. Background technique [0002] At present, MCU is widely used in electrical products, but the program upgrade of MCU without on-chip ROM is quite complicated. Take rear-projection TV as an example. As a popular and best-selling product recently, its functions are changing with each passing day. There are more and more software requirements, and the software version is also constantly updated. At present, the upgrade of the software needs to open the case for operation, so the user needs to send it to the repair station for repair and upgrade or the after-sales service personnel to provide on-site service. However, after the complete machine leaves the factory, sending it to a maintenance station for maintenance and upgrading or after-sales service personnel to provide door-to-door service will increase costs and cause inconvenience to users. If...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F9/445
Inventor 刘东施薇
Owner SICHUAN CHANGHONG ELECTRIC CO LTD