JPH0248912B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pattern generation device that generates a dot pattern obtained by rotating a dot pattern expressed in a matrix by, for example, 90 degrees.

[Description of Prior Art and its Problems] Conventionally, in order to rotate a pattern, a method of performing matrix calculation using software is used. This method required a lot of processing and did not allow rapid rotation of the dot pattern.

In addition, in character display devices, character dot patterns are often stored with directionality (horizontal or vertical writing), and in character display devices that can perform both horizontal and vertical writing, character dot patterns for horizontal writing are It is necessary to prepare two types: a character dot pattern for vertical writing, and a character dot pattern for vertical writing. Therefore, twice the memory capacity is required, and in a system that allows character display in both horizontal and vertical writing, the memory increases and becomes uneconomical.

Furthermore, some conventional character processing devices rotate dot patterns using hardware, but this requires extra peripheral circuits and poses problems in terms of cost and processing speed. Ta.

[Means and effects for solving the problem] The present invention rotates the pattern data stored in the storage means by controlling the readout order, thereby simplifying the peripheral circuitry for special rotation processing. The purpose of the present invention is to provide an inexpensive pattern generating device that can be

The present invention can quickly perform dot pattern rotation processing, and can also convert, for example, the orientation of character dot patterns arranged and stored for horizontal (vertical) writing into character dot patterns that can be written vertically (horizontal). The present invention aims to provide a pattern generator.

[Example] An embodiment of the present invention will be described below with reference to the drawings.

Figure 1 shows the method of dividing a dot pattern according to the present invention, in which a dot pattern of one character is divided into M lines and N lines.
It is divided into a unit matrix group _AMN of columns, and the unit matrix Amn is further divided into elements Aij corresponding to each dot as shown in FIG.

Each element aij of the unit matrix Amn is sequentially arranged as shown in FIG. 2 and stored in a (i.j) bit one word memory. For example, if i = j = 4, it may be stored in a memory with 16 bits per word, or if the memory is 8 bits per word, two sets of memory elements may be prepared and these two sets of memories can be accessed at the same time. Just leave it there. In the case of memory with 4 bits per word, 4 sets, 1
Naturally, in the case of a 1-bit word, it is sufficient to prepare 16 sets. What is important here is that (i and j) bits can be accessed simultaneously.

If (M·N) such memories are prepared, all the dots of the dot pattern can be stored.

When a pattern is generated using a memory in which the dot pattern is divided in this way, A ₁₁ , A ₁₂ ,
The memory is accessed in the order of A ₁₃ ,...A _MN , and the output data, i.e., aij, is a 11 , a ₁₁ , as shown in Figure 3.
A normal pattern can be obtained by using a ₁₂ and a ₁₃ in this order as a video signal for a pattern generator.

Also, access to memory is A _M1 , A _(M-1)1 ,...,
Switch the order of A ₁₁ , A _M2 , A _(M-1)2 , ..., A _MN , ..., A _1N and output data aij as ai ₁ ,
If the sequence a _(i-1)1 , ...a ₂₁ , a ₁₁ is used as a video signal for a pattern generator, a pattern rotated 90 degrees to the right can be obtained.

Similarly, A _M,N , A _M(N-1) , ...A _M2 , A _M1 , ...A _(M-1)2 ,
A _(M-1)1 …A ₁

Claims (1)

[Claims] 1. Pattern data consisting of M (rows) xi (dots) and N (columns) xj (dots) in the horizontal and vertical directions, respectively, into MxN unit matrices in the horizontal and vertical directions, respectively. storage means for dividing and storing the pattern data in the storage means; counting means for counting the pattern data in the storage means in dot units in the column direction and the row direction; and in response to the count by the counting means, the pattern data in the storage means The normal arrangement of the unit matrices constituting A ₁₁ , A ₁₂ , ..., A _1N , A ₂₁ , A ₂₂ , ...
…, A _M1 , …, A _MN (however, A _no is the unit matrix of m row and n column that constitutes the pattern data), when rotated 90 degrees clockwise.
A _M1 , A _(M-1)1 , ..., A ₁₁ , A _M2 , A _(M-1)2 , ...,
A _MN , ..., A _1N , when rotated 180 degrees clockwise
A _MN , A _M(N-1) , ..., A _M1 , A _(M-1)N , A _(M-1)(N-1) ,
..., A _1N , ..., A ₁₁ , when rotated 270 degrees clockwise, A _1N , A _2N , ..., A _MN , A _1(N-1) , A _2(N-1) ,...
..., A ₁₁ , ...A _M1 from the storage means in the order of i (dot) xj.
When each unit matrix consisting of (dots) is read out from the storage means in a normal arrangement, the dot data forming each unit matrix is read out in the normal arrangement a ₁₁ , a ₁₂ , ..., a _1j , a ₂₁ , a ₂₂ , ..., a _i1 ...
..., a _ij (where a _rs is the dot data of the r row and the s column constituting each unit matrix), and the data lines are selected to be output in the order in which each unit matrix is rotated by 90 degrees. , the dot data constituting each unit matrix is a _i1 , a _(i-1)1 , ...,
Select the data lines to be output in the order of a ₁₁ , a _i2 , a _(i-1)2 , ..., a _ij , ..., a _1j and check that each unit matrix is
When read out in the order of 180 degree rotation, the dot data constituting each unit matrix is a _ij ,
a _i(j-1) , ..., a _i1 , a _(i-1)j , a _(i-1)(j-1) , ..., a _1
j ,
When the data lines to be output are selected in the order of ..., a ₁₁ , and each unit matrix is read out in the order of rotation by 270 degrees, the dot data forming each unit matrix is a _1j , a _2j , ... , a _ij , a _1(j-1) , a _2(j-1) ,…
..., a ₁₁ , ..., a _i1 , the switch means being switched in response to the count of the counting means, and the pattern data stored in the storage means being 0
A pattern generator characterized by outputting patterns rotated by 90 degrees, 90 degrees, 180 degrees, and 270 degrees. (However, M, N, i, and j are integers of 2 or more.) 2. The number of unit matrices of rows and columns of pattern data stored in the storage means is M=N=p.
(p is an integer of 2 or more), and the number of dot data in the rows and columns of each unit matrix is i =
2. The pattern generating device according to claim 1, wherein j=q (q is an integer of 2 or more).