Difference: SevenSegmentDisplayAndKeypad (2 vs. 3)

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META TOPICPARENT	name="Exercises"

Seven Segment Display and Keypad

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Carefully read the data sheet.

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Write a driver implementing the serial protocol. Implement he driver as class TM1637 with the following methods:

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Write a driver implementing the serial protocol. Implement the driver as class TM1637 with the following methods:

start_transfer: implements the start sequence (dio going low when clk is high)
stop transfer: implements the "end of transfer" sequence (dio going high when clk is high)
write_bit: write a single bit: with clk low, set dio to the bit value, then send a pulse (high followed by low) on the clk pin
write byte: send 8 bits. After the eights bit, check the acknowledge signal. Switch dio to input, check acq, switch dio back to output after the falling edge of the nineth clock pulse
display on: switch the display on: start_transfer, send display_on command, stop transfer

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create a table with the led setting of the seven segments. dp means decimal point, which is only used on the second digit, where it controls the following colon.

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create a table with the led setting of the seven segments for all hex digits and a clear digit (all segments off). dp means decimal point, which is only used on the second digit, where it controls the following colon.

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