UPDATE DEVICE FOR USB TO RS232 ADAPTER

Abstract

An exemplary device for USB to RS232 adapter includes a computer with a code update software stored therein, a connector, and a voltage converter coupled to the connector. The computer is configured to connect to one end of the USB to RS232 adapter. The connector is configured to connect to an opposite end of the USB to RS232 adapter for receiving a low voltage signal from the computer via the RS232 adapter. The voltage converter is for receiving the low voltage signal and converting the low voltage signal to a high voltage signal to be transmitted to the computer via the connector and the USB to RS232 adapter, so that the computer starts the code update software to update the USB to RS232 adapter.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a circuit diagram of a controller of an update device for a USB to RS232 adapter in accordance with a preferred embodiment of the present invention; and

FIG. 2 is a block diagram of the update device for a USB to RS232 adapter, together with a USB to RS232 adapter.

Claims

1. An update device for a USB to RS232 adapter, comprising: a computer with a code update software stored therein, configured to connect to one end of the USB to RS232 adapter;a connector configured to connect to an opposite end of the USB to RS232 adapter for receiving a low voltage signal from the computer via the RS232 adapter; anda voltage converter coupled to the connector for receiving the low voltage signal, and converting the low voltage signal to a high voltage signal to be transmitted to the computer via the connector and the USB to RS232 adapter so that results in the computer starts the code update software to update the USB to RS232 adapter.

2. The update device as claimed in claim 1, wherein the low voltage signal is a 5V voltage signal, the high voltage signal is a 12V voltage signal, and the voltage converter is a 5V to 12V voltage converter.

3. The update device as claimed in claim 2, wherein the connector comprises two signal pins and a power pin, the voltage converter comprises a power pin, an output pin, and a state pin, the output pin and the state pin of the voltage converter are coupled to the two signal pins of the connector respectively, the state pin is grounded, and the power pin of the connector is connected to the power pin of the voltage converter.

4. The update device as claimed in claim 3, wherein the voltage converter has a ground pin connected to ground.

5. The update device as claimed in claim 3, further comprising a light-emitting diode (LED) connected between the power pin of the connector and ground.

6. A method for updating a USB to RS232 adapter which has a RS232 connector at one end thereof connected to a controller and a USB end at an opposite end thereof connected to a computer with a code update software stored therein, the method comprising the steps of: sending a low voltage signal from the computer to the controller through the USB to RS232 adapter;converting the low voltage signal to a high voltage signal;sending the high voltage signal from the controller to the computer via the USB to RS232 adapter; andrunning the code update software to update the USB to RS232 adapter.

7. The method as claimed in claim 6, wherein the controller comprises a connector configured to connect to the RS232 end, and a voltage converter coupled to the connector and configured for converting the low voltage signal to the high voltage signal.

8. A controller adapted for updating an electronic device with a program IC chip, the electronic device connecting to a computer with a code update software stored therein, the controller comprising: a connector configured to connect to the electronic device, the connector comprising two signal pins, a power pin, and a ground pin being grounded; anda voltage converter coupled to the connector, comprising a power pin connected to the power pin of the connector for receiving a low voltage signal from the computer to be converted to a high voltage signal, an output pin connected to one of the two signal pins of the connector, for outputting the high voltage signal to the computer via the electronic device to start the code update software to update the IC chip, a state pin connected to the other signal pin of the connector, and a ground pin being grounded.

9. The controller as claimed in claim 8, further comprising a light-emitting diode (LED) connected between the power pin of the connector and ground.