drivers: display: Introduce SSD1331
Introduces driver for SSD1331 RGB OLED controller Signed-off-by: Camille BAUD <mail@massdriver.space>
This commit is contained in:
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commit
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5 changed files with 514 additions and 0 deletions
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@ -22,6 +22,7 @@ zephyr_library_sources_ifdef(CONFIG_SSD1306 ssd1306.c)
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zephyr_library_sources_ifdef(CONFIG_SSD1327 ssd1327.c)
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zephyr_library_sources_ifdef(CONFIG_SSD16XX ssd16xx.c)
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zephyr_library_sources_ifdef(CONFIG_SSD1322 ssd1322.c)
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zephyr_library_sources_ifdef(CONFIG_SSD1331 display_ssd1331.c)
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zephyr_library_sources_ifdef(CONFIG_ST75256 display_st75256.c)
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zephyr_library_sources_ifdef(CONFIG_ST7567 display_st7567.c)
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zephyr_library_sources_ifdef(CONFIG_ST7789V display_st7789v.c)
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@ -32,6 +32,7 @@ source "drivers/display/Kconfig.ssd1320"
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source "drivers/display/Kconfig.ssd1327"
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source "drivers/display/Kconfig.ssd16xx"
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source "drivers/display/Kconfig.ssd1322"
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source "drivers/display/Kconfig.ssd1331"
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source "drivers/display/Kconfig.st75256"
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source "drivers/display/Kconfig.st7567"
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source "drivers/display/Kconfig.st7735r"
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43
drivers/display/Kconfig.ssd1331
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43
drivers/display/Kconfig.ssd1331
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@ -0,0 +1,43 @@
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# SSD1331 display controller configuration options
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# Copyright (c) 2025 MASSDRIVER EI (massdriver.space)
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# SPDX-License-Identifier: Apache-2.0
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menuconfig SSD1331
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bool "SSD1331 display controller driver"
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default y
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depends on DT_HAS_SOLOMON_SSD1331_ENABLED
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select MIPI_DBI
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help
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Enable driver for SSD1331 display controller.
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if SSD1331
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config SSD1331_DEFAULT_CONTRAST
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int "SSD1331 default contrast"
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default 100
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range 0 255
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help
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SSD1331 default contrast.
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config SSD1331_CONTRASTA
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int "SSD1331 contrast multiplier for seg A"
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default 145
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range 0 255
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help
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Contrast multiplier for seg A
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config SSD1331_CONTRASTB
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int "SSD1331 contrast multiplier for seg B"
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default 80
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range 0 255
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help
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Contrast multiplier for seg B
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config SSD1331_CONTRASTC
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int "SSD1331 contrast multiplier for seg C"
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default 125
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range 0 255
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help
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Contrast multiplier for seg C
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endif # SSD1331
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373
drivers/display/display_ssd1331.c
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373
drivers/display/display_ssd1331.c
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@ -0,0 +1,373 @@
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/*
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* Copyright (c) 2025 MASSDRIVER EI (massdriver.space)
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr/logging/log.h>
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LOG_MODULE_REGISTER(ssd1331, CONFIG_DISPLAY_LOG_LEVEL);
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#include <string.h>
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#include <zephyr/device.h>
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#include <zephyr/init.h>
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#include <zephyr/drivers/display.h>
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#include <zephyr/drivers/gpio.h>
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#include <zephyr/drivers/mipi_dbi.h>
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#include <zephyr/kernel.h>
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#define SSD1331_DISPLAY_OFF 0xAE
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#define SSD1331_DISPLAY_ON 0xAF
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#define SSD1331_SET_NORMAL_DISPLAY 0xA4
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#define SSD1331_SET_REVERSE_DISPLAY 0xA7
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#define SSD1331_SET_COLUMN_ADDR 0x15
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#define SSD1331_SET_ROW_ADDR 0x75
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#define SSD1331_SET_DISPLAY_START_LINE 0xA1
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#define SSD1331_SET_DISPLAY_OFFSET 0xA2
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#define SSD1331_SET_MULTIPLEX_RATIO 0xA8
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#define SSD1331_SET_PHASE_LENGTH 0xB1
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#define SSD1331_SET_OSC_FREQ 0xB3
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#define SSD1331_SET_PRECHARGE_A 0x8A
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#define SSD1331_SET_PRECHARGE_B 0x8B
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#define SSD1331_SET_PRECHARGE_C 0x8C
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#define SSD1331_SET_PRECHARGE_V 0xBB
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#define SSD1331_SET_VCOMH 0xBE
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#define SSD1331_SET_CURRENT_ATT 0x87
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#define SSD1331_SET_REMAP 0xA0
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#define SSD1331_DISABLE_SCROLL 0x2E
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#define SSD1331_SET_EXTERNAL_SUPPLY 0xAD
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#define SSD1331_EXTERNAL_SUPPLY 0x8E
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#define SSD1331_SET_POWER_SAVE 0xB0
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#define SSD1331_POWER_SAVE 0x1A
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#define SSD1331_NOT_POWER_SAVE 0x0B
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#define SSD1331_CONTRASTA 0x81
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#define SSD1331_CONTRASTB 0x82
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#define SSD1331_CONTRASTC 0x83
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#define SSD1331_RESET_DELAY 10
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struct ssd1331_config {
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const struct device *mipi_dev;
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const struct mipi_dbi_config dbi_config;
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uint16_t height;
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uint16_t width;
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uint8_t start_line;
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uint8_t display_offset;
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uint8_t multiplex_ratio;
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uint8_t phase_length;
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uint8_t oscillator_freq;
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uint8_t precharge_time_a;
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uint8_t precharge_time_b;
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uint8_t precharge_time_c;
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uint8_t precharge_voltage;
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uint8_t vcomh_voltage;
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uint8_t current_att;
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uint8_t remap_value;
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bool power_save;
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bool color_inversion;
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};
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/* SSD1331 doesn't follow typical DBI behavior with D/C pin so we do this to make it fit in DBI */
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static inline int ssd1331_write_command(const struct device *dev, uint8_t cmd, const uint8_t *buf,
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size_t len)
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{
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const struct ssd1331_config *config = dev->config;
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int err;
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err = mipi_dbi_command_write(config->mipi_dev, &config->dbi_config, cmd, NULL, 0);
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if (err < 0) {
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return err;
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}
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for (int x = 0; x < len; x++) {
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err = mipi_dbi_command_write(config->mipi_dev, &config->dbi_config, buf[x], NULL,
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0);
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if (err < 0) {
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return err;
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}
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}
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return err;
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}
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static inline int ssd1331_set_hardware_config(const struct device *dev)
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{
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const struct ssd1331_config *config = dev->config;
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int err;
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uint8_t tmp;
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err = ssd1331_write_command(dev, SSD1331_SET_REMAP, &config->remap_value, 1);
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if (err < 0) {
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return err;
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}
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err = ssd1331_write_command(dev, SSD1331_SET_DISPLAY_START_LINE, &config->start_line, 1);
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if (err < 0) {
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return err;
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}
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err = ssd1331_write_command(dev, SSD1331_SET_DISPLAY_OFFSET, &config->display_offset, 1);
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if (err < 0) {
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return err;
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}
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err = ssd1331_write_command(dev, SSD1331_SET_MULTIPLEX_RATIO, &config->multiplex_ratio, 1);
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if (err < 0) {
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return err;
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}
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tmp = SSD1331_EXTERNAL_SUPPLY;
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err = ssd1331_write_command(dev, SSD1331_SET_EXTERNAL_SUPPLY, &tmp, 1);
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if (err < 0) {
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return err;
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}
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tmp = config->power_save ? SSD1331_POWER_SAVE : SSD1331_NOT_POWER_SAVE;
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err = ssd1331_write_command(dev, SSD1331_SET_POWER_SAVE, &tmp, 1);
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if (err < 0) {
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return err;
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}
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err = ssd1331_write_command(dev, SSD1331_SET_PHASE_LENGTH, &config->phase_length, 1);
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if (err < 0) {
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return err;
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}
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err = ssd1331_write_command(dev, SSD1331_SET_OSC_FREQ, &config->oscillator_freq, 1);
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if (err < 0) {
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return err;
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}
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err = ssd1331_write_command(dev, SSD1331_SET_PRECHARGE_A, &config->precharge_time_a, 1);
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if (err < 0) {
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return err;
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}
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err = ssd1331_write_command(dev, SSD1331_SET_PRECHARGE_B, &config->precharge_time_b, 1);
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if (err < 0) {
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return err;
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}
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err = ssd1331_write_command(dev, SSD1331_SET_PRECHARGE_C, &config->precharge_time_c, 1);
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if (err < 0) {
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return err;
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}
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err = ssd1331_write_command(dev, SSD1331_SET_PRECHARGE_V, &config->precharge_voltage, 1);
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if (err < 0) {
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return err;
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}
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err = ssd1331_write_command(dev, SSD1331_SET_VCOMH, &config->vcomh_voltage, 1);
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if (err < 0) {
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return err;
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}
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err = ssd1331_write_command(dev, SSD1331_SET_CURRENT_ATT, &config->current_att, 1);
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if (err < 0) {
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return err;
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}
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return ssd1331_write_command(dev, SSD1331_DISABLE_SCROLL, NULL, 0);
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}
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static int ssd1331_resume(const struct device *dev)
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{
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const struct ssd1331_config *config = dev->config;
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int err;
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err = ssd1331_write_command(dev, SSD1331_DISPLAY_ON, NULL, 0);
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if (err < 0) {
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return err;
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}
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return mipi_dbi_release(config->mipi_dev, &config->dbi_config);
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}
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static int ssd1331_suspend(const struct device *dev)
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{
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const struct ssd1331_config *config = dev->config;
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int err;
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err = ssd1331_write_command(dev, SSD1331_DISPLAY_OFF, NULL, 0);
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if (err < 0) {
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return err;
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}
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return mipi_dbi_release(config->mipi_dev, &config->dbi_config);
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}
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static int ssd1331_write(const struct device *dev, const uint16_t x, const uint16_t y,
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const struct display_buffer_descriptor *desc, const void *buf)
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{
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const struct ssd1331_config *config = dev->config;
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int err;
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size_t buf_len;
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struct display_buffer_descriptor mipi_desc = *desc;
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uint8_t x_position[] = {x, x + desc->width - 1};
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uint8_t y_position[] = {y, y + desc->height - 1};
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if (desc->pitch != desc->width) {
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LOG_ERR("Pitch is not width");
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return -EINVAL;
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}
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/* Following the datasheet, two segment are split in one register */
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buf_len = MIN(desc->buf_size, desc->height * desc->width * 2);
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if (buf == NULL || buf_len == 0U) {
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LOG_ERR("Display buffer is not available");
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return -EINVAL;
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}
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LOG_DBG("x %u, y %u, pitch %u, width %u, height %u, buf_len %u", x, y, desc->pitch,
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desc->width, desc->height, buf_len);
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err = ssd1331_write_command(dev, SSD1331_SET_COLUMN_ADDR, x_position, 2);
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if (err < 0) {
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return err;
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}
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err = ssd1331_write_command(dev, SSD1331_SET_ROW_ADDR, y_position, 2);
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if (err < 0) {
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return err;
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}
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err = mipi_dbi_write_display(config->mipi_dev, &config->dbi_config, buf, &mipi_desc,
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PIXEL_FORMAT_RGB_565);
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if (err < 0) {
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return err;
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}
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return mipi_dbi_release(config->mipi_dev, &config->dbi_config);
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}
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static int ssd1331_set_contrast(const struct device *dev, const uint8_t contrast)
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{
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int err;
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uint8_t tmp;
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tmp = (contrast * CONFIG_SSD1331_CONTRASTA) / 0xFF;
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err = ssd1331_write_command(dev, SSD1331_CONTRASTA, &tmp, 1);
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if (err < 0) {
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return err;
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}
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tmp = (contrast * CONFIG_SSD1331_CONTRASTB) / 0xFF;
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err = ssd1331_write_command(dev, SSD1331_CONTRASTB, &tmp, 1);
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if (err < 0) {
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return err;
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}
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tmp = (contrast * CONFIG_SSD1331_CONTRASTC) / 0xFF;
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return ssd1331_write_command(dev, SSD1331_CONTRASTC, &tmp, 1);
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}
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static void ssd1331_get_capabilities(const struct device *dev, struct display_capabilities *caps)
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{
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const struct ssd1331_config *config = dev->config;
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memset(caps, 0, sizeof(struct display_capabilities));
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caps->x_resolution = config->width;
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caps->y_resolution = config->height;
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caps->supported_pixel_formats = PIXEL_FORMAT_RGB_565;
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caps->current_pixel_format = PIXEL_FORMAT_RGB_565;
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caps->screen_info = 0;
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}
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static int ssd1331_set_pixel_format(const struct device *dev, const enum display_pixel_format pf)
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{
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if (pf == PIXEL_FORMAT_RGB_565) {
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return 0;
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}
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LOG_ERR("Unsupported pixel format");
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return -ENOTSUP;
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}
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static int ssd1331_init_device(const struct device *dev)
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{
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const struct ssd1331_config *config = dev->config;
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int err;
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/* Turn display off */
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err = ssd1331_suspend(dev);
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if (err < 0) {
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return err;
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}
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err = ssd1331_set_hardware_config(dev);
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if (err < 0) {
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return err;
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}
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err = ssd1331_set_contrast(dev, CONFIG_SSD1331_DEFAULT_CONTRAST);
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if (err < 0) {
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return err;
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}
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err = ssd1331_write_command(dev,
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config->color_inversion ? SSD1331_SET_REVERSE_DISPLAY
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: SSD1331_SET_NORMAL_DISPLAY,
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NULL, 0);
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if (err < 0) {
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return err;
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}
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err = ssd1331_resume(dev);
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if (err < 0) {
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return err;
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}
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return mipi_dbi_release(config->mipi_dev, &config->dbi_config);
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}
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static int ssd1331_init(const struct device *dev)
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{
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const struct ssd1331_config *config = dev->config;
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int err;
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LOG_DBG("Initializing device");
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if (!device_is_ready(config->mipi_dev)) {
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LOG_ERR("MIPI Device not ready!");
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return -EINVAL;
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}
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err = mipi_dbi_reset(config->mipi_dev, SSD1331_RESET_DELAY);
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if (err < 0) {
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LOG_ERR("Failed to reset device!");
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return err;
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}
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err = ssd1331_init_device(dev);
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if (err < 0) {
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LOG_ERR("Failed to initialize device! %d", err);
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return err;
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}
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return 0;
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}
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static DEVICE_API(display, ssd1331_driver_api) = {
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.blanking_on = ssd1331_suspend,
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.blanking_off = ssd1331_resume,
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.write = ssd1331_write,
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.set_contrast = ssd1331_set_contrast,
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.get_capabilities = ssd1331_get_capabilities,
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.set_pixel_format = ssd1331_set_pixel_format,
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};
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#define SSD1331_WORD_SIZE(inst) \
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((DT_STRING_UPPER_TOKEN(inst, mipi_mode) == MIPI_DBI_MODE_SPI_4WIRE) ? SPI_WORD_SET(8) \
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: SPI_WORD_SET(9))
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#define SSD1331_DEFINE_MIPI(node_id) \
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static const struct ssd1331_config config##node_id = { \
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.mipi_dev = DEVICE_DT_GET(DT_PARENT(node_id)), \
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.dbi_config = MIPI_DBI_CONFIG_DT( \
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node_id, SSD1331_WORD_SIZE(node_id) | SPI_OP_MODE_MASTER, 0), \
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.height = DT_PROP(node_id, height), \
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.width = DT_PROP(node_id, width), \
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.display_offset = DT_PROP(node_id, display_offset), \
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.start_line = DT_PROP(node_id, start_line), \
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.multiplex_ratio = DT_PROP(node_id, multiplex_ratio), \
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.phase_length = DT_PROP(node_id, phase_length), \
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.oscillator_freq = DT_PROP(node_id, oscillator_freq), \
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.power_save = DT_PROP(node_id, power_save), \
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.precharge_time_a = DT_PROP(node_id, precharge_time_a), \
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.precharge_time_b = DT_PROP(node_id, precharge_time_b), \
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.precharge_time_c = DT_PROP(node_id, precharge_time_c), \
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.precharge_voltage = DT_PROP(node_id, precharge_voltage), \
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.vcomh_voltage = DT_PROP(node_id, vcomh_voltage), \
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.current_att = DT_PROP(node_id, current_att), \
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.color_inversion = DT_PROP(node_id, inversion_on), \
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.remap_value = DT_PROP(node_id, remap_value), \
|
||||
}; \
|
||||
\
|
||||
DEVICE_DT_DEFINE(node_id, ssd1331_init, NULL, NULL, &config##node_id, \
|
||||
POST_KERNEL, CONFIG_DISPLAY_INIT_PRIORITY, &ssd1331_driver_api);
|
||||
|
||||
DT_FOREACH_STATUS_OKAY(solomon_ssd1331, SSD1331_DEFINE_MIPI)
|
96
dts/bindings/display/solomon,ssd1331.yaml
Normal file
96
dts/bindings/display/solomon,ssd1331.yaml
Normal file
|
@ -0,0 +1,96 @@
|
|||
# Copyright (c) 2025 MASSDRIVER EI (massdriver.space)
|
||||
# SPDX-License-Identifier: Apache-2.0
|
||||
|
||||
description: SSD1331 display controller
|
||||
|
||||
compatible: "solomon,ssd1331"
|
||||
|
||||
include: [mipi-dbi-spi-device.yaml, display-controller.yaml]
|
||||
|
||||
properties:
|
||||
display-offset:
|
||||
type: int
|
||||
required: true
|
||||
description: Vertical offset by com from 0 ~ 63. Typically 64 - height.
|
||||
|
||||
start-line:
|
||||
type: int
|
||||
required: true
|
||||
description: Start line of display RAM to be displayed by selecting a value from 0 to 63.
|
||||
Typically 0.
|
||||
|
||||
multiplex-ratio:
|
||||
type: int
|
||||
required: true
|
||||
description: Multiplex ratio from 16MUX to 64MUX, ranges from 15 to 63.
|
||||
Typically same value as height - 1.
|
||||
|
||||
phase-length:
|
||||
type: int
|
||||
required: true
|
||||
description: Phase 2 Period (7:4) and Phase 1 Period (3:0).
|
||||
|
||||
oscillator-freq:
|
||||
type: int
|
||||
required: true
|
||||
description: Front clock divider (3:0) / oscillator frequency (7:4).
|
||||
If you get weird scanlines, increase oscillator frequency and play with phase length values,
|
||||
for example set this to 0xF0. Note this increases power consumption.
|
||||
|
||||
precharge-time-a:
|
||||
type: int
|
||||
required: true
|
||||
description: Set precharge time for segments A. Typically around 0x70.
|
||||
|
||||
precharge-time-b:
|
||||
type: int
|
||||
required: true
|
||||
description: Set precharge time for segments B. Typically around 0x70.
|
||||
|
||||
precharge-time-c:
|
||||
type: int
|
||||
required: true
|
||||
description: Set precharge time for segments C. Typically around 0x70.
|
||||
|
||||
precharge-voltage:
|
||||
type: int
|
||||
required: true
|
||||
description: Set precharge voltage. A[5:1], from 0 (0.10 x VCC) to 0x3E (0.5 x VCC)
|
||||
|
||||
vcomh-voltage:
|
||||
type: int
|
||||
required: true
|
||||
enum:
|
||||
- 0x0
|
||||
- 0x10
|
||||
- 0x20
|
||||
- 0x30
|
||||
- 0x3E
|
||||
description: Set COM deselect voltage. A[5:1]. 0.44, 0.52, 0.61, 0.71, 0.83 x VCC.
|
||||
|
||||
current-att:
|
||||
type: int
|
||||
required: true
|
||||
description: Set Master current attenuation. A[3:0], from 1/16 to 16/16.
|
||||
|
||||
remap-value:
|
||||
type: int
|
||||
required: true
|
||||
description: Remap register
|
||||
|
||||
Has multiple configurations (see each bit setting in the datasheet)
|
||||
- A[0] HTiled or VTiled. Must be 0 for this driver.
|
||||
- A[1] Invert segment order
|
||||
- A[2] Invert ABC segment order
|
||||
- A[3] Left-Right Swap COMs
|
||||
- A[4] Invert COM order
|
||||
- A[5] Stripped odd/even display
|
||||
- A[7:6] Set color format. Must be 0x1 for this driver.
|
||||
|
||||
power-save:
|
||||
type: boolean
|
||||
description: Enable Power Save mode
|
||||
|
||||
inversion-on:
|
||||
type: boolean
|
||||
description: Turn on display color inverting
|
Loading…
Add table
Add a link
Reference in a new issue