Bus digit judgment method, device and equipment and readable storage medium

Abstract

The invention provides a bus bit number judgment method, device and equipment and a readable storage medium. The method comprises the steps: carrying out zero clearing on a plurality of shift registers in a head chip; inputting predetermined first data to each shift register, then inputting a predetermined number of 0 data, sampling an output signal of each shift register, and storing the output signal of each shift register; comparing the output signal of each shift register with the first data so as to acquire the shift register which exists effectively in the plurality of shift registers; and acquiring bus bits in the head chip according to an effective shift register. Based on the method, the data bus digit of the thermal printing head sheet can be simply and efficiently identified.

Description

technical field [0001] The invention relates to the field of buses, in particular to a method, device, equipment and readable storage medium for judging the number of bits of a bus. Background technique [0002] The control signal of the thermal print head includes clock clk, input data DIN, output data DOUT, latch Latch and heating Strobe signal. For different print heads, the number of bits of the data bus is different, for example, there are 1, 2, 4 For a product that needs to be compatible with multiple print heads, how to easily and efficiently identify the number of bits of the data bus of the head is very important. [0003] In the prior art, the type of the header can be identified by adding an electrical signal generated by a circuit on the board. During production or use, it must be adapted in advance according to the header matched with the board, and the process is cumbersome. [0004] In addition, it can also be controlled by matching different programs with di...

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, the type of header can be identified by adding electrical signals generated by the circuit on the board. When producing or using it, it must be adapted in advance according to the header matched with the board, and the process is cumbersome.

[0004] In addition, it can also be controlled by matching different programs with different headers, but this will lead to many maintenance versions, which is very difficult to maintain

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