139 lines
4.8 KiB
C
139 lines
4.8 KiB
C
/****************************************************************************
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* include/nuttx/lcd/st7567.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __INCLUDE_NUTTX_LCD_ST7567_H
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#define __INCLUDE_NUTTX_LCD_ST7567_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <stdbool.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* ST7567 Configuration Settings:
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*
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* CONFIG_ST7567_SPIMODE - Controls the SPI mode
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* CONFIG_ST7567_FREQUENCY - Define to use a different bus frequency
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* CONFIG_ST7567_NINTERFACES - Specifies the number of physical
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* ST7567 devices that will be supported. NOTE: At present, this
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* must be undefined or defined to be 1.
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* CONFIG_ST7567_POWER
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* If the hardware supports a controllable LCD a power supply, this
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* configuration should be defined. (See st7567_power() below).
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*
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* Required LCD driver settings:
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* CONFIG_LCD_ST7567 - Enable ST7567 support
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* CONFIG_LCD_MAXCONTRAST should be 255, but any value >0 and <=255 will be
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* accepted.
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* CONFIG_LCD_MAXPOWER should be 2: 0=off, 1=dim, 2=normal
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*
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* Required SPI driver settings:
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* CONFIG_SPI_CMDDATA - Include support for cmd/data selection.
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*/
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/* Some important "colors" */
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#define ST7567_Y1_BLACK 0
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#define ST7567_Y1_WHITE 1
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/* Only two power settings are supported: */
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#define ST7567_POWER_OFF 0
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#define ST7567_POWER_ON 1
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/****************************************************************************
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* Public Types
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****************************************************************************/
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/****************************************************************************
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* Public Data
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****************************************************************************/
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: st7567_initialize
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*
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* Description:
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* Initialize the ST7567 video hardware. The initial state of the
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* LCD is fully initialized, display memory cleared, and the LCD ready
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* to use, but with the power setting at 0 (full off == sleep mode).
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*
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* Input Parameters:
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*
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* spi - A reference to the SPI driver instance.
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* devno - A value in the range of 0 throst7567h
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* CONFIG_ST7567_NINTERFACES-1.
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* This allows support for multiple LCD devices.
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*
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* Returned Value:
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*
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* On success, this function returns a reference to the LCD object for
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* the specified LCD. NULL is returned on any failure.
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*
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****************************************************************************/
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struct lcd_dev_s; /* see nuttx/lcd.h */
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struct spi_dev_s; /* see nuttx/spi/spi.h */
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FAR struct lcd_dev_s *st7567_initialize(FAR struct spi_dev_s *spi,
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unsigned int devno);
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/****************************************************************************
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* Name: st7567_power
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*
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* Description:
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* If the hardware supports a controllable LCD a power supply, this
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* interface should be provided. It may be called by the driver to turn
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* the LCD power on and off as needed.
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*
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* Input Parameters:
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*
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* devno - A value in the range of 0 through CONFIG_ST7567_NINTERFACES-1.
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* This allows support for multiple LCD devices.
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* on - true:turn power on, false: turn power off.
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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#ifdef CONFIG_ST7567_POWER
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void st7567_power(unsigned int devno, bool on);
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#else
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# define st7567_power(a,b)
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* __INCLUDE_NUTTX_LCD_ST7567_H */
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