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/* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <>.
/** library to drive vacuum fluorescent display using supertex HV518 shift register VFD drivers (API)
* @details the current configuration is for a VFD extracted from a Samsung SER-6500 cash register
* @file vfd_hv518.h
* @author King Kévin <>
* @date 2016
* @note peripherals used: USART @ref usart
/** number HV518 VFD drivers */
#define VFD_DRIVERS 3
/** number of digits blocks on SER-6500 VFD */
#define VFD_DIGITS 10
/** number of dot matrix blocks on SER-6500 VFD */
#define VFD_MATRIX 12
/** set character to digit block
* @param[in] nb digit block to set
* @param[in] c ASCII character to set
* @note use the MSB of @p nb to enable the dot
void vfd_digit(uint8_t nb, char c);
/** set character to matrix block
* @param[in] nb matrix block to set
* @param[in] c ASCII character to set
* @note on ASCII characters are used for pictures
void vfd_matrix(uint8_t nb, char c);
/** clear VFD display */
void vfd_clear(void);
/** test VFD display (light up all segments) */
void vfd_test(void);
/** switch VFD on */
void vfd_on(void);
/** switch VFD display off */
void vfd_off(void);
/** setup VFD */
void vfd_setup(void);