40 lines
1.5 KiB
C
40 lines
1.5 KiB
C
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/* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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/* Copyright (c) 2016 King Kévin <kingkevin@cuvoodoo.info> */
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/* this library is used to drive the vacuum fluorescent display extracted from a Samsung SER-6500 cash register
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* it uses three chained supertex HV518 shift register VFD drivers */
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/* the number of blocks available on the VFD */
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#define VFD_DRIVERS 3
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#define VFD_DIGITS 10
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#define VFD_MATRIX 12
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/* set digit <nb> to ASCII character <c>
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* use the MSB of <c> to enable the dot */
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void vfd_digit(uint8_t nb, char c);
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/* set dot matrix <nb> to ASCII character <c>
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* non ASCII characters are used for pictures */
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void vfd_matrix(uint8_t nb, char c);
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/* clear VFD display */
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void vfd_clear(void);
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/* test VFD display (light up all anodes) */
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void vfd_test(void);
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/* transmit every digit and matrix */
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void vfd_on(void);
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/* switch VFD display off */
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void vfd_off(void);
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/* setup VFD */
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void vfd_setup(void);
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