160 lines
4.8 KiB
C
160 lines
4.8 KiB
C
/****************************************************************************
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* boards/arm/sam34/flipnclick-sam3x/src/sam_ssd1306.c
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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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/* SSD1306 OLED
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*
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* The HiletGo is a 128x64 OLED that can be driven either via SPI or I2C
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* (SPI is the default and is what is used here).
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* I have mounted the OLED on a proto click board.
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* The OLED is connected as follows:
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*
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* OLED ALIAS DESCRIPTION PROTO CLICK
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* ----- ----------- ------------- -----------------
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* GND Ground GND
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* VCC Power Supply 5V (3-5V)
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* D0 SCL,CLK,SCK Clock SCK
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* D1 SDA,MOSI Data MOSI,SDI
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* RES RST,RESET Reset RST (GPIO OUTPUT)
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* DC AO Data/Command INT (GPIO OUTPUT)
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* CS Chip Select CS (GPIO OUTPUT)
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*/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <debug.h>
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#include <nuttx/board.h>
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#include <nuttx/spi/spi.h>
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#include <nuttx/lcd/lcd.h>
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#include <nuttx/lcd/ssd1306.h>
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#if defined(CONFIG_VIDEO_FB) && defined(CONFIG_LCD_FRAMEBUFFER)
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# include <nuttx/video/fb.h>
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#endif
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#include "sam_gpio.h"
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#include "sam_spi.h"
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#include "flipnclick-sam3x.h"
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#ifdef HAVE_SSD1306
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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#ifndef CONFIG_SPI_CMDDATA
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# error "The OLED driver requires CONFIG_SPI_CMDDATA in the configuration"
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#endif
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: sam_graphics_setup
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*
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* Description:
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* Called by either NX initialization logic (via board_graphics_setup) or
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* directly from the board bring-up logic in order to configure the
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* SSD1306 OLED.
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*
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****************************************************************************/
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struct lcd_dev_s *sam_graphics_setup(unsigned int devno)
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{
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struct spi_dev_s *spi;
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struct lcd_dev_s *dev;
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/* Configure the OLED GPIOs. This initial configuration is RESET low,
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* putting the OLED into reset state.
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*/
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sam_configgpio(GPIO_SSD1306_RST);
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/* Wait a bit then release the OLED from the reset state */
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up_mdelay(20);
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sam_gpiowrite(GPIO_SSD1306_RST, true);
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/* Get the SPI1 port interface */
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spi = sam_spibus_initialize(GPIO_SSD1306_CS);
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if (!spi)
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{
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lcderr("ERROR: Failed to initialize SPI port 1\n");
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}
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else
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{
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/* Bind the SPI port to the OLED */
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dev = ssd1306_initialize(spi, NULL, devno);
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if (!dev)
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{
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lcderr("ERROR: Failed to bind SPI port 1 to OLED %d\n", devno);
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}
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else
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{
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lcdinfo("Bound SPI port 1 to OLED %d\n", devno);
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/* And turn the OLED on */
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dev->setpower(dev, CONFIG_LCD_MAXPOWER);
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#if defined(CONFIG_VIDEO_FB) && defined(CONFIG_LCD_FRAMEBUFFER)
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/* Initialize and register the simulated framebuffer driver */
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ret = fb_register(0, 0);
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if (ret < 0)
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{
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syslog(LOG_ERR, "ERROR: fb_register() failed: %d\n", ret);
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}
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#endif
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return dev;
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}
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}
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return NULL;
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}
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/****************************************************************************
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* Name: board_graphics_setup
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*
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* Description:
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* Called by NX initialization logic to configure the OLED.
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*
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****************************************************************************/
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#ifdef CONFIG_NXSTART_EXTERNINIT
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struct lcd_dev_s *board_graphics_setup(unsigned int devno)
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{
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return sam_graphics_setup(devno);
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}
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#endif
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#endif /* HAVE_SSD1306 */
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