Commit f7e8fced authored by Birte Kristina Friesel's avatar Birte Kristina Friesel
Browse files

Add SSD1306 OLED display driver

parent e585d524

Makefile

+9 −0
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@@ -108,6 +108,10 @@ ifneq ($(findstring sharp96,${drivers}), ) 
	CONFIG_driver_sharp96 = y

endif



ifneq ($(findstring ssd1306,${drivers}), )

	CONFIG_driver_ssd1306 = y

endif



ifneq ($(findstring tsl2591,${drivers}), )

	CONFIG_driver_tsl2591 = y

endif
@@ -251,6 +255,11 @@ ifdef CONFIG_driver_sharp96 
	COMMON_FLAGS += -DSHARP96_CS_PIN=GPIO::${sharp96_cs_pin}

endif



ifdef CONFIG_driver_ssd1306

	CXX_TARGETS += src/driver/ssd1306.cc

	COMMON_FLAGS += -DDRIVER_SSD1306 -DSSD1306_WIDTH=${CONFIG_driver_ssd1306_width} -DSSD1306_HEIGHT=${CONFIG_driver_ssd1306_height}

endif



ifdef CONFIG_driver_resistive_load

	CXX_TARGETS += src/driver/resistive_load.cc

	resistor1_pin ?= p3_0

include/driver/ssd1306.h

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/*

 * Copyright 2021 Daniel Friesel

 *

 * SPDX-License-Identifier: BSD-2-Clause

 */

#ifndef SSD1306_H

#define SSD1306_H



#define SSD1306_SET_CONTRAST 0x81

#define SSD1306_SET_ENTIRE_ON 0xa4

#define SSD1306_SET_NORM_INV 0xa6

#define SSD1306_SET_DISP 0xae

#define SSD1306_SET_MEM_ADDR 0x20

#define SSD1306_SET_COL_ADDR 0x21

#define SSD1306_SET_PAGE_ADDR 0x22

#define SSD1306_SET_DISP_START_LINE 0x40

#define SSD1306_SET_SEG_REMAP 0xa0

#define SSD1306_SET_MUX_RATIO 0xa8

#define SSD1306_SET_COM_OUT_DIR 0xc0

#define SSD1306_SET_DISP_OFFSET 0xd3

#define SSD1306_SET_COM_PIN_CFG 0xda

#define SSD1306_SET_DISP_CLK_DIV 0xd5

#define SSD1306_SET_PRECHARGE 0xd9

#define SSD1306_SET_VCOM_DESEL 0xdb

#define SSD1306_SET_CHARGE_PUMP 0x8d



#include <stdint.h>

#include <stddef.h>



class SSD1306 {

	private:

		const uint8_t width = SSD1306_WIDTH;

		const uint8_t height = SSD1306_HEIGHT;

		SSD1306(const SSD1306 &copy);



		unsigned char const address = 0x3c;



		unsigned char txbuf[130];

		unsigned char rxbuf[2];



		const unsigned char init1[6] = {

			SSD1306_SET_DISP | 0x00,

			SSD1306_SET_MEM_ADDR, 0x00,

			SSD1306_SET_DISP_START_LINE | 0x00,

			SSD1306_SET_SEG_REMAP | 0x01,

			SSD1306_SET_MUX_RATIO

		};

		// height

		const unsigned char init2[4] = {

			SSD1306_SET_COM_OUT_DIR | 0x08,

			SSD1306_SET_DISP_OFFSET, 0x00,

			SSD1306_SET_COM_PIN_CFG

		};

		// height == 32? 0x02 : 0x12

		const unsigned char init3[13] = {

			SSD1306_SET_DISP_CLK_DIV, 0x80,

			SSD1306_SET_PRECHARGE, 0xf1,

			SSD1306_SET_VCOM_DESEL, 0x30,

			SSD1306_SET_CONTRAST, 0xff,

			SSD1306_SET_ENTIRE_ON,

			SSD1306_SET_NORM_INV,

			SSD1306_SET_CHARGE_PUMP, 0x14,

			SSD1306_SET_DISP | 0x01

		};



		void writeCommand(uint8_t command);

		void writeData(unsigned char* data);



	public:

		SSD1306() {}



		void init();

		void showImage(unsigned char* data, uint16_t length);

};



extern SSD1306 ssd1306;



#endif

src/driver/Kconfig

+14 −0
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@@ -80,6 +80,20 @@ config driver_sharp96 
bool "sharp LS013B4DN 96x96px Transflective LC Display"

depends on ( arch_msp430fr5969lp || arch_msp430fr5994lp ) && meta_driver_spi



config driver_ssd1306

bool "SSD1306 I2C OLED display"

depends on meta_driver_i2c



config driver_ssd1306_width

int "Display width"

default 128

depends on driver_ssd1306



config driver_ssd1306_height

int "Display height"

default 64

depends on driver_ssd1306



config driver_softi2c

bool "Software I2C"

#depends on !driver_i2c

src/driver/ssd1306.cc

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/*

 * Copyright 2021 Daniel Friesel

 *

 * SPDX-License-Identifier: BSD-2-Clause

 */

#include "driver/ssd1306.h"

#include "driver/i2c.h"

#include "driver/soft_i2c.h"



void SSD1306::writeCommand(uint8_t command)

{

	txbuf[0] = 0x80;

	txbuf[1] = command;

	i2c.xmit(address, 2, txbuf, 0, rxbuf);

}



void SSD1306::init()

{

	unsigned char i;

	for (i = 0; i < sizeof(init1); i++) {

		writeCommand(init1[i]);

	}

	writeCommand(height - 1);

	for (i = 0; i < sizeof(init2); i++) {

		writeCommand(init2[i]);

	}

	writeCommand(height == 32 ? 0x02 : 0x12);

	for (i = 0; i < sizeof(init3); i++) {

		writeCommand(init3[i]);

	}

}



void SSD1306::showImage(unsigned char* data, uint16_t length)

{

	uint8_t i;

	uint8_t j;

	txbuf[0] = 0x40;

	for (i = 0; i < length / 128; i++) {

		for (j = 0; j < 128; j++) {

			txbuf[j+1] = data[(uint16_t)i*128 + j];

		}

		i2c.xmit(address, 129, txbuf, 0, rxbuf);

	}

	if (length % 128) {

		for (j = 0; j < length % 128; j++) {

			txbuf[j+1] = data[(uint16_t)i*128 + j];

		}

		i2c.xmit(address, (length % 128) + 1, txbuf, 0, rxbuf);

	}

}



SSD1306 ssd1306;