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ADC port simulation multi-IO-port key input device, television-system and method

An input device and button technology, which is applied to the components of TV systems, TVs, color TVs, etc., can solve the problems of occupying MCU resources and increasing power consumption, and achieve the effects of reducing power consumption, expanding sampling intervals, and saving MCU resources

Inactive Publication Date: 2014-03-26
LE SHI ZHI ZIN ELECTRONIC TECHNOLOGY (TIANJIN) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But even if the button does not have any action, the MCU of the prior art still needs to scan the IO port all the time, which takes up a lot of MCU resources and increases power consumption.

Method used

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  • ADC port simulation multi-IO-port key input device, television-system and method
  • ADC port simulation multi-IO-port key input device, television-system and method
  • ADC port simulation multi-IO-port key input device, television-system and method

Examples

Experimental program
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Effect test

Embodiment 1

[0035] see figure 2 The present invention provides an ADC port analog multi-IO port key input device 2 . The device 2 includes four analog button modules 21 connected in parallel between the power supply module and the ADC input port of the MCU module, and each analog button module 21 includes an electric button 211 and a grounding resistor 212 connected in series.

[0036] If any of the electric keys 211 in the analog key module 21 is triggered, that is, the electric key 211 is pressed, the electric key 211 is in a closed state. The power module and the analog button module 21 with the electric key 211 in a closed state form a closed loop. After the power module passes through the closed loop, a voltage drop will occur, and the voltage received by the ADC input port sent by the power module to the MCU module will decrease. The magnitude of the voltage drop generated by the power module passing through the closed loop is determined by the resistance value of the grounding re...

Embodiment 2

[0040] see figure 2 , further, when the electric key in the analog key module 21 is triggered, the interrupt input port of the MCU module receives an interrupt signal. When the interrupt input port of the MCU module receives an interrupt signal lower than a preset voltage value, the MCU module responds to the interrupt signal. The MCU module responds to the interrupt signal, and the MCU module reads the key action information of the analog key module 21 sampled through the ADC input port of the MCU module.

[0041]If any of the electric keys 211 in the analog key module 21 is triggered, that is, the electric key 211 is pressed, the electric key 211 is in a closed state. The power module and the analog button module 21 in which the electric key 211 is closed form a closed loop. After the power module passes through the closed loop, a voltage drop will occur, and the voltage received by the interrupt input port sent by the power module to the MCU module will also decrease. Be...

Embodiment 3

[0044] see image 3 , the present invention also provides an ADC port analog multi-IO port key input device 3 . The device 3 includes four analog button modules 31 connected in parallel between the power supply module and the ADC input port of the MCU module, and each analog button module 31 includes an electric button 311 and a resistor 312 connected in series.

[0045] If the electric key 311 in any analog key module 31 is triggered, that is, the electric key 311 is pressed, the electric key 311 is in a closed state. The power module and the analog button module 31 in the closed state of the electric key 311 form a closed loop. After the power module passes through the closed loop, a voltage drop will occur, and the voltage received by the ADC input port sent by the power module to the MCU module will decrease. The magnitude of the voltage drop generated by the power module passing through the closed loop is determined by the resistance value of the resistor 312 in each ana...

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Abstract

The invention provides an ADC port simulation multi-IO-port key input device, television-system and method. The device comprises at least one simulation key module. The input end of every simulation key module is connected with a power module; the output end of every simulation key module is connected with an ADC input port of a MCU module. Each simulation key module comprises a key and a resistor which are connected in series. The power module is connected to an interrupt input port of the MCU module through the simulation key modules. When triggered, the keys of the simulation key modules send interrupt signals to the MCU module. After receiving the interrupt signals through the interrupt input port of the MCU module, the MCU module responds to the interrupt signals and reads key actions which are done by the simulation key modules and which are sampled by the ADC input port of the MCU module. Scanning IO ports constantly is not required, MCU resources are saved, and power consumption is reduced.

Description

technical field [0001] The invention relates to the technical field of IO (input-output) port key input, in particular to an ADC port analog multi-IO port key input device, a television system and a method. Background technique [0002] At present, the button control used in the existing electrical equipment, that is, the switch state of the button is realized through the high and low levels of the IO port, or the high and low levels are converted into ADC (analog-to-digital conversion) voltages and sent to the MCU, MCU ( Microprocessor) judges the type and state of the button according to the high or low state of the level or the magnitude of the voltage. However, one ADC input port of the MCU can only simulate one IO port key input, resulting in insufficient IO port resources of the MCU. [0003] The patent CN2704982 whose publication date is June 15, 2005 discloses a TV circuit in which the ADC input port simulates a plurality of IO port button inputs, see figure 1 , wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/44H04N5/63G06F13/24
CPCY02D10/00
Inventor 阚伟生
Owner LE SHI ZHI ZIN ELECTRONIC TECHNOLOGY (TIANJIN) LTD
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