468 lines
12 KiB
C
468 lines
12 KiB
C
/*
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* Copyright (c) 2018 PHYTEC Messtechnik GmbH
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#define LOG_LEVEL CONFIG_DISPLAY_LOG_LEVEL
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#include <logging/log.h>
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LOG_MODULE_REGISTER(ssd1306);
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#include <string.h>
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#include <device.h>
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#include <init.h>
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#include <gpio.h>
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#include <i2c.h>
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#include "ssd1306_regs.h"
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#include <display/cfb.h>
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#if DT_SOLOMON_SSD1306FB_0_SEGMENT_REMAP == 1
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#define SSD1306_PANEL_SEGMENT_REMAP true
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#else
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#define SSD1306_PANEL_SEGMENT_REMAP false
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#endif
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#if DT_SOLOMON_SSD1306FB_0_COM_INVDIR == 1
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#define SSD1306_PANEL_COM_INVDIR true
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#else
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#define SSD1306_PANEL_COM_INVDIR false
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#endif
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#define SSD1306_PANEL_NUMOF_PAGES (DT_SOLOMON_SSD1306FB_0_HEIGHT / 8)
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#define SSD1306_CLOCK_DIV_RATIO 0x0
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#define SSD1306_CLOCK_FREQUENCY 0x8
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#define SSD1306_PANEL_MUX_RATIO 63
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#define SSD1306_PANEL_VCOM_DESEL_LEVEL 0x20
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#define SSD1306_PANEL_PUMP_VOLTAGE SSD1306_SET_PUMP_VOLTAGE_90
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#if defined(CONFIG_SSD1306_SH1106_COMPATIBLE)
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#define SSD1306_PANEL_NUMOF_COLUMS 132
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#else
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#define SSD1306_PANEL_NUMOF_COLUMS 128
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#endif
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#ifndef SSD1306_ADDRESSING_MODE
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#define SSD1306_ADDRESSING_MODE (SSD1306_SET_MEM_ADDRESSING_HORIZONTAL)
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#endif
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struct ssd1306_data {
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struct device *reset;
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struct device *i2c;
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u8_t contrast;
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u8_t scan_mode;
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};
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static inline int ssd1306_reg_read(struct ssd1306_data *driver,
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u8_t reg, u8_t * const val)
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{
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return i2c_reg_read_byte(driver->i2c, DT_SOLOMON_SSD1306FB_0_BASE_ADDRESS,
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reg, val);
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}
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static inline int ssd1306_reg_write(struct ssd1306_data *driver,
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u8_t reg, u8_t val)
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{
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return i2c_reg_write_byte(driver->i2c, DT_SOLOMON_SSD1306FB_0_BASE_ADDRESS,
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reg, val);
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}
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static inline int ssd1306_reg_update(struct ssd1306_data *driver, u8_t reg,
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u8_t mask, u8_t val)
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{
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return i2c_reg_update_byte(driver->i2c, DT_SOLOMON_SSD1306FB_0_BASE_ADDRESS,
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reg, mask, val);
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}
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static inline int ssd1306_set_panel_orientation(struct device *dev)
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{
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struct ssd1306_data *driver = dev->driver_data;
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u8_t cmd_buf[] = {
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SSD1306_CONTROL_BYTE_CMD,
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(SSD1306_PANEL_SEGMENT_REMAP ?
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SSD1306_SET_SEGMENT_MAP_REMAPED :
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SSD1306_SET_SEGMENT_MAP_NORMAL),
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SSD1306_CONTROL_LAST_BYTE_CMD,
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(SSD1306_PANEL_COM_INVDIR ?
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SSD1306_SET_COM_OUTPUT_SCAN_FLIPPED :
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SSD1306_SET_COM_OUTPUT_SCAN_NORMAL)
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};
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return i2c_write(driver->i2c, cmd_buf, sizeof(cmd_buf),
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DT_SOLOMON_SSD1306FB_0_BASE_ADDRESS);
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}
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static inline int ssd1306_set_timing_setting(struct device *dev)
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{
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struct ssd1306_data *driver = dev->driver_data;
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u8_t cmd_buf[] = {
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SSD1306_CONTROL_BYTE_CMD,
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SSD1306_SET_CLOCK_DIV_RATIO,
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SSD1306_CONTROL_BYTE_CMD,
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(SSD1306_CLOCK_FREQUENCY << 4) | SSD1306_CLOCK_DIV_RATIO,
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SSD1306_CONTROL_BYTE_CMD,
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SSD1306_SET_CHARGE_PERIOD,
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SSD1306_CONTROL_BYTE_CMD,
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DT_SOLOMON_SSD1306FB_0_PRECHARGEP,
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SSD1306_CONTROL_BYTE_CMD,
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SSD1306_SET_VCOM_DESELECT_LEVEL,
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SSD1306_CONTROL_LAST_BYTE_CMD,
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SSD1306_PANEL_VCOM_DESEL_LEVEL
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};
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return i2c_write(driver->i2c, cmd_buf, sizeof(cmd_buf),
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DT_SOLOMON_SSD1306FB_0_BASE_ADDRESS);
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}
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static inline int ssd1306_set_hardware_config(struct device *dev)
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{
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struct ssd1306_data *driver = dev->driver_data;
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u8_t cmd_buf[] = {
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SSD1306_CONTROL_BYTE_CMD,
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SSD1306_SET_START_LINE,
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SSD1306_CONTROL_BYTE_CMD,
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SSD1306_SET_DISPLAY_OFFSET,
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SSD1306_CONTROL_BYTE_CMD,
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DT_SOLOMON_SSD1306FB_0_DISPLAY_OFFSET,
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SSD1306_CONTROL_BYTE_CMD,
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SSD1306_SET_PADS_HW_CONFIG,
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SSD1306_CONTROL_BYTE_CMD,
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SSD1306_SET_PADS_HW_ALTERNATIVE,
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SSD1306_CONTROL_BYTE_CMD,
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SSD1306_SET_MULTIPLEX_RATIO,
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SSD1306_CONTROL_LAST_BYTE_CMD,
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SSD1306_PANEL_MUX_RATIO
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};
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return i2c_write(driver->i2c, cmd_buf, sizeof(cmd_buf),
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DT_SOLOMON_SSD1306FB_0_BASE_ADDRESS);
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}
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static inline int ssd1306_set_charge_pump(const struct device *dev)
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{
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struct ssd1306_data *driver = dev->driver_data;
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u8_t cmd_buf[] = {
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#if defined(CONFIG_SSD1306_DEFAULT)
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SSD1306_CONTROL_BYTE_CMD,
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SSD1306_SET_CHARGE_PUMP_ON,
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SSD1306_CONTROL_BYTE_CMD,
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SSD1306_SET_CHARGE_PUMP_ON_ENABLED,
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#endif
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#if defined(CONFIG_SSD1306_SH1106_COMPATIBLE)
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SSD1306_CONTROL_BYTE_CMD,
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SH1106_SET_DCDC_MODE,
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SSD1306_CONTROL_BYTE_CMD,
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SH1106_SET_DCDC_ENABLED,
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#endif
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SSD1306_CONTROL_LAST_BYTE_CMD,
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SSD1306_PANEL_PUMP_VOLTAGE,
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};
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return i2c_write(driver->i2c, cmd_buf, sizeof(cmd_buf),
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DT_SOLOMON_SSD1306FB_0_BASE_ADDRESS);
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}
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int ssd1306_resume(const struct device *dev)
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{
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struct ssd1306_data *driver = dev->driver_data;
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/* set display on */
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return ssd1306_reg_write(driver, SSD1306_CONTROL_LAST_BYTE_CMD,
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SSD1306_DISPLAY_ON);
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}
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int ssd1306_suspend(const struct device *dev)
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{
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struct ssd1306_data *driver = dev->driver_data;
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/* set display on */
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return ssd1306_reg_write(driver, SSD1306_CONTROL_LAST_BYTE_CMD,
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SSD1306_DISPLAY_OFF);
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}
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int ssd1306_write_page(const struct device *dev, u8_t page, void const *data,
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size_t length)
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{
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struct ssd1306_data *driver = dev->driver_data;
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u8_t cmd_buf[] = {
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#ifdef OLED_PANEL_CONTROLLER_SSD1306
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SSD1306_CONTROL_BYTE_CMD,
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SSD1306_SET_MEM_ADDRESSING_MODE,
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SSD1306_CONTROL_BYTE_CMD,
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SSD1306_SET_MEM_ADDRESSING_PAGE,
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#endif
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SSD1306_CONTROL_BYTE_CMD,
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SSD1306_SET_LOWER_COL_ADDRESS |
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(DT_SOLOMON_SSD1306FB_0_SEGMENT_OFFSET &
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SSD1306_SET_LOWER_COL_ADDRESS_MASK),
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SSD1306_CONTROL_BYTE_CMD,
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SSD1306_SET_HIGHER_COL_ADDRESS |
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((DT_SOLOMON_SSD1306FB_0_SEGMENT_OFFSET >> 4) &
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SSD1306_SET_LOWER_COL_ADDRESS_MASK),
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SSD1306_CONTROL_LAST_BYTE_CMD,
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SSD1306_SET_PAGE_START_ADDRESS | page
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};
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if (page >= SSD1306_PANEL_NUMOF_PAGES) {
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return -1;
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}
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if (length > SSD1306_PANEL_NUMOF_COLUMS) {
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return -1;
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}
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if (i2c_write(driver->i2c, cmd_buf, sizeof(cmd_buf),
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DT_SOLOMON_SSD1306FB_0_BASE_ADDRESS)) {
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return -1;
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}
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return i2c_burst_write(driver->i2c, DT_SOLOMON_SSD1306FB_0_BASE_ADDRESS,
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SSD1306_CONTROL_LAST_BYTE_DATA,
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data, length);
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}
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int ssd1306_write(const struct device *dev, const u16_t x, const u16_t y,
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const struct display_buffer_descriptor *desc,
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const void *buf)
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{
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if (desc->pitch < desc->width) {
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LOG_ERR("Pitch is smaller then width");
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return -1;
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}
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if (buf == NULL || desc->buf_size == 0) {
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LOG_ERR("Display buffer is not available");
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return -1;
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}
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if (desc->pitch > desc->width) {
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LOG_ERR("Unsupported mode");
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return -1;
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}
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if (x != 0 && y != 0) {
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LOG_ERR("Unsupported origin");
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return -1;
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}
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#if defined(CONFIG_SSD1306_DEFAULT)
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struct ssd1306_data *driver = dev->driver_data;
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u8_t cmd_buf[] = {
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SSD1306_CONTROL_BYTE_CMD,
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SSD1306_SET_MEM_ADDRESSING_MODE,
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SSD1306_CONTROL_BYTE_CMD,
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SSD1306_ADDRESSING_MODE,
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SSD1306_CONTROL_BYTE_CMD,
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SSD1306_SET_COLUMN_ADDRESS,
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SSD1306_CONTROL_BYTE_CMD,
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0,
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SSD1306_CONTROL_BYTE_CMD,
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(SSD1306_PANEL_NUMOF_COLUMS - 1),
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SSD1306_CONTROL_BYTE_CMD,
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SSD1306_SET_PAGE_ADDRESS,
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SSD1306_CONTROL_BYTE_CMD,
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0,
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SSD1306_CONTROL_LAST_BYTE_CMD,
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(SSD1306_PANEL_NUMOF_PAGES - 1)
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};
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if (i2c_write(driver->i2c, cmd_buf, sizeof(cmd_buf),
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DT_SOLOMON_SSD1306FB_0_BASE_ADDRESS)) {
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LOG_ERR("Failed to write command");
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return -1;
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}
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return i2c_burst_write(driver->i2c, DT_SOLOMON_SSD1306FB_0_BASE_ADDRESS,
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SSD1306_CONTROL_LAST_BYTE_DATA,
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(u8_t *)buf, desc->buf_size);
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#elif defined(CONFIG_SSD1306_SH1106_COMPATIBLE)
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if (desc->buf_size !=
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(SSD1306_PANEL_NUMOF_PAGES * DT_SOLOMON_SSD1306FB_0_WIDTH)) {
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return -1;
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}
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for (size_t pidx = 0; pidx < SSD1306_PANEL_NUMOF_PAGES; pidx++) {
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if (ssd1306_write_page(dev, pidx, buf,
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DT_SOLOMON_SSD1306FB_0_WIDTH)) {
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return -1;
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}
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buf = (u8_t *)buf + DT_SOLOMON_SSD1306FB_0_WIDTH;
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}
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#endif
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return 0;
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}
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static int ssd1306_read(const struct device *dev, const u16_t x,
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const u16_t y,
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const struct display_buffer_descriptor *desc,
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void *buf)
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{
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LOG_ERR("Unsupported");
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return -ENOTSUP;
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}
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static void *ssd1306_get_framebuffer(const struct device *dev)
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{
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LOG_ERR("Unsupported");
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return NULL;
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}
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static int ssd1306_set_brightness(const struct device *dev,
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const u8_t brightness)
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{
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LOG_WRN("Unsupported");
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return -ENOTSUP;
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}
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int ssd1306_set_contrast(const struct device *dev, const u8_t contrast)
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{
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struct ssd1306_data *driver = dev->driver_data;
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u8_t cmd_buf[] = {
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SSD1306_CONTROL_BYTE_CMD,
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SSD1306_SET_CONTRAST_CTRL,
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SSD1306_CONTROL_LAST_BYTE_CMD,
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contrast,
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};
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return i2c_write(driver->i2c, cmd_buf, sizeof(cmd_buf),
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DT_SOLOMON_SSD1306FB_0_BASE_ADDRESS);
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}
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static void ssd1306_get_capabilities(const struct device *dev,
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struct display_capabilities *caps)
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{
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memset(caps, 0, sizeof(struct display_capabilities));
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caps->x_resolution = DT_SOLOMON_SSD1306FB_0_WIDTH;
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caps->y_resolution = DT_SOLOMON_SSD1306FB_0_HEIGHT;
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caps->supported_pixel_formats = PIXEL_FORMAT_MONO10;
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caps->current_pixel_format = PIXEL_FORMAT_MONO10;
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caps->screen_info = SCREEN_INFO_MONO_VTILED;
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}
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static int ssd1306_set_orientation(const struct device *dev,
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const enum display_orientation
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orientation)
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{
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LOG_ERR("Unsupported");
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return -ENOTSUP;
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}
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static int ssd1306_set_pixel_format(const struct device *dev,
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const enum display_pixel_format pf)
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{
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if (pf == PIXEL_FORMAT_MONO10) {
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return 0;
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}
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LOG_ERR("Unsupported");
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return -ENOTSUP;
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}
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static int ssd1306_init_device(struct device *dev)
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{
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struct ssd1306_data *driver = dev->driver_data;
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u8_t cmd_buf[] = {
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SSD1306_CONTROL_BYTE_CMD,
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SSD1306_SET_ENTIRE_DISPLAY_OFF,
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SSD1306_CONTROL_LAST_BYTE_CMD,
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SSD1306_SET_NORMAL_DISPLAY,
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};
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#ifdef DT_SOLOMON_SSD1306FB_0_RESET_GPIOS_CONTROLLER
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gpio_pin_write(driver->reset, DT_SOLOMON_SSD1306FB_0_RESET_GPIOS_PIN, 1);
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k_sleep(SSD1306_RESET_DELAY);
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gpio_pin_write(driver->reset, DT_SOLOMON_SSD1306FB_0_RESET_GPIOS_PIN, 0);
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k_sleep(SSD1306_RESET_DELAY);
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gpio_pin_write(driver->reset, DT_SOLOMON_SSD1306FB_0_RESET_GPIOS_PIN, 1);
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#endif
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/* Turn display off */
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if (ssd1306_reg_write(driver, SSD1306_CONTROL_LAST_BYTE_CMD,
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SSD1306_DISPLAY_OFF)) {
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return -EIO;
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}
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if (ssd1306_set_timing_setting(dev)) {
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return -EIO;
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}
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if (ssd1306_set_hardware_config(dev)) {
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return -EIO;
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}
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if (ssd1306_set_panel_orientation(dev)) {
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return -EIO;
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}
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if (ssd1306_set_charge_pump(dev)) {
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return -EIO;
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}
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if (i2c_write(driver->i2c, cmd_buf, sizeof(cmd_buf),
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DT_SOLOMON_SSD1306FB_0_BASE_ADDRESS)) {
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return -EIO;
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}
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if (ssd1306_set_contrast(dev, CONFIG_SSD1306_DEFAULT_CONTRAST)) {
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return -EIO;
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}
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ssd1306_resume(dev);
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return 0;
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}
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static int ssd1306_init(struct device *dev)
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{
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struct ssd1306_data *driver = dev->driver_data;
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LOG_DBG("");
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driver->i2c = device_get_binding(DT_SOLOMON_SSD1306FB_0_BUS_NAME);
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if (driver->i2c == NULL) {
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LOG_ERR("Failed to get pointer to %s device!",
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DT_SOLOMON_SSD1306FB_0_BUS_NAME);
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return -EINVAL;
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}
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#ifdef DT_SOLOMON_SSD1306FB_0_RESET_GPIOS_CONTROLLER
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driver->reset = device_get_binding(DT_SOLOMON_SSD1306FB_0_RESET_GPIOS_CONTROLLER);
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if (driver->reset == NULL) {
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LOG_ERR("Failed to get pointer to %s device!",
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DT_SOLOMON_SSD1306FB_0_RESET_GPIOS_CONTROLLER);
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return -EINVAL;
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}
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gpio_pin_configure(driver->reset, DT_SOLOMON_SSD1306FB_0_RESET_GPIOS_PIN,
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GPIO_DIR_OUT);
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#endif
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if (ssd1306_init_device(dev)) {
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LOG_ERR("Failed to initialize device!");
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return -EIO;
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}
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return 0;
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}
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static struct ssd1306_data ssd1306_driver;
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static struct display_driver_api ssd1306_driver_api = {
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.blanking_on = ssd1306_suspend,
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.blanking_off = ssd1306_resume,
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.write = ssd1306_write,
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.read = ssd1306_read,
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.get_framebuffer = ssd1306_get_framebuffer,
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.set_brightness = ssd1306_set_brightness,
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.set_contrast = ssd1306_set_contrast,
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.get_capabilities = ssd1306_get_capabilities,
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.set_pixel_format = ssd1306_set_pixel_format,
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.set_orientation = ssd1306_set_orientation,
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};
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DEVICE_AND_API_INIT(ssd1306, DT_SOLOMON_SSD1306FB_0_LABEL, ssd1306_init,
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&ssd1306_driver, NULL,
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POST_KERNEL, CONFIG_APPLICATION_INIT_PRIORITY,
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&ssd1306_driver_api);
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