[Solved]6 Develop 8051 Based System Detecting Keypress Array 8 Pushbutton Switchesconnected Thc Po Q37193758
6. Develop an 8051-based system for detecting the keypress of an array of 8 pushbutton switches.connected to thc port pins P1.0 to Pl.7 of the microcontroller. Using an AND gate generate an external interrupt signal when an one of the push buttion switch is depressed Identify which push buttion is depressed by scanning the status the push button connected port pins, in the interupt service routine for the external interrupt. The port pins are scanned in the arder Pl.0 to Pl.7. Even if multiple push buttions are depressed, the first identified push button switch is recognised as the valid keypress Uses hardware key de-hounce circuthMC for implementing the key de-bouncing for all push buttons. An 8 ohm speaker is connected to port pin P2.0. Generate different tones (by varying the frequency (say 100Hz, 200Hz, 3008z, 500Hz, etc) of the pulse generated af the port pin in which the speaker is coanected, corresponding to each push button press. Use BCS47 transistor based driver circuit driving the speaker Show transcribed image text 6. Develop an 8051-based system for detecting the keypress of an array of 8 pushbutton switches.connected to thc port pins P1.0 to Pl.7 of the microcontroller. Using an AND gate generate an external interrupt signal when an one of the push buttion switch is depressed Identify which push buttion is depressed by scanning the status the push button connected port pins, in the interupt service routine for the external interrupt. The port pins are scanned in the arder Pl.0 to Pl.7. Even if multiple push buttions are depressed, the first identified push button switch is recognised as the valid keypress Uses hardware key de-hounce circuthMC for implementing the key de-bouncing for all push buttons. An 8 ohm speaker is connected to port pin P2.0. Generate different tones (by varying the frequency (say 100Hz, 200Hz, 3008z, 500Hz, etc) of the pulse generated af the port pin in which the speaker is coanected, corresponding to each push button press. Use BCS47 transistor based driver circuit driving the speaker
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