95 lines
3.3 KiB
C
95 lines
3.3 KiB
C
/*
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Pretty LAYer for ChibiOS/RT - Copyright (C) 2015 Rocco Marco Guglielmi
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This file is part of PLAY for ChibiOS/RT.
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PLAY 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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PLAY 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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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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Special thanks to Giovanni Di Sirio for teachings, his moral support and
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friendship. Note that some or every piece of this file could be part of
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the ChibiOS project that is intellectual property of Giovanni Di Sirio.
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Please refer to ChibiOS/RT license before use this file.
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For suggestion or Bug report - roccomarco.guglielmi@playembedded.org
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*/
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/**
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* @file max7219.c
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* @brief MAX7219 display driver module code.
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*
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* @addtogroup max7219
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* @{
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*/
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#include "ch.h"
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#include "hal.h"
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#include "max7219.h"
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/*===========================================================================*/
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/* Driver local definitions. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver exported variables. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver local variables and types. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver local functions. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver exported functions. */
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/*===========================================================================*/
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/**
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* @brief Reads a generic register value.
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* @pre The SPI interface must be initialized and the driver started.
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*
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* @param[in] spip pointer to the SPI interface
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* @param[in] adr address number
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* @param[in] data data value.
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*/
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void max7219WriteRegister(SPIDriver *spip, uint16_t adr, uint8_t data) {
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switch (adr) {
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default:
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return;
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case MAX7219_AD_DIGIT_0:
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case MAX7219_AD_DIGIT_1:
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case MAX7219_AD_DIGIT_2:
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case MAX7219_AD_DIGIT_3:
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case MAX7219_AD_DIGIT_4:
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case MAX7219_AD_DIGIT_5:
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case MAX7219_AD_DIGIT_6:
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case MAX7219_AD_DIGIT_7:
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case MAX7219_AD_DECODE_MODE:
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case MAX7219_AD_INTENSITY:
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case MAX7219_AD_SCAN_LIMIT:
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case MAX7219_AD_SHUTDOWN:
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case MAX7219_AD_DISPLAY_TEST:
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spiSelect(spip);
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uint16_t txbuf = {adr | data};
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spiSend(spip, 1, &txbuf);
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spiUnselect(spip);
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}
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}
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/** @} */
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