added TextBoxDemo

TextBoxDemo/CMakeLists.txt

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+# The following lines of boilerplate have to be in your project's CMakeLists
+# in this exact order for cmake to work correctly
+cmake_minimum_required(VERSION 3.5)
+
+set(EXTRA_COMPONENT_DIRS ../components/ssd1306)
+
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+project(ssd1306)

TextBoxDemo/README.md

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+# TextBoxDemo for SSD1306
+
+This project uses an 8-dot font.   
+The maximum number of characters that can be displayed is 16 characters.   
+By using the ssd1306_display_text_box function, it is possible to display more than 16 characters.   
+
+

TextBoxDemo/main/CMakeLists.txt

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+set(COMPONENT_SRCS "main.c")
+set(COMPONENT_ADD_INCLUDEDIRS "")
+
+register_component()

TextBoxDemo/main/component.mk

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+#
+# Main component makefile.
+#
+# This Makefile can be left empty. By default, it will take the sources in the 
+# src/ directory, compile them and link them into lib(subdirectory_name).a 
+# in the build directory. This behaviour is entirely configurable,
+# please read the ESP-IDF documents if you need to do this.
+#

TextBoxDemo/main/main.c

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+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "esp_log.h"
+
+#include "ssd1306.h"
+#include "font8x8_basic.h"
+
+/*
+ You have to set this config value with menuconfig
+ CONFIG_INTERFACE
+
+ for i2c
+ CONFIG_MODEL
+ CONFIG_SDA_GPIO
+ CONFIG_SCL_GPIO
+ CONFIG_RESET_GPIO
+
+ for SPI
+ CONFIG_CS_GPIO
+ CONFIG_DC_GPIO
+ CONFIG_RESET_GPIO
+*/
+
+#define tag "SSD1306"
+
+void app_main(void)
+{
+	SSD1306_t dev;
+#if 0
+	int center, top, bottom;
+	char lineChar[20];
+#endif
+
+#if CONFIG_I2C_INTERFACE
+	ESP_LOGI(tag, "INTERFACE is i2c");
+	ESP_LOGI(tag, "CONFIG_SDA_GPIO=%d",CONFIG_SDA_GPIO);
+	ESP_LOGI(tag, "CONFIG_SCL_GPIO=%d",CONFIG_SCL_GPIO);
+	ESP_LOGI(tag, "CONFIG_RESET_GPIO=%d",CONFIG_RESET_GPIO);
+	i2c_master_init(&dev, CONFIG_SDA_GPIO, CONFIG_SCL_GPIO, CONFIG_RESET_GPIO);
+#endif // CONFIG_I2C_INTERFACE
+
+#if CONFIG_SPI_INTERFACE
+	ESP_LOGI(tag, "INTERFACE is SPI");
+	ESP_LOGI(tag, "CONFIG_MOSI_GPIO=%d",CONFIG_MOSI_GPIO);
+	ESP_LOGI(tag, "CONFIG_SCLK_GPIO=%d",CONFIG_SCLK_GPIO);
+	ESP_LOGI(tag, "CONFIG_CS_GPIO=%d",CONFIG_CS_GPIO);
+	ESP_LOGI(tag, "CONFIG_DC_GPIO=%d",CONFIG_DC_GPIO);
+	ESP_LOGI(tag, "CONFIG_RESET_GPIO=%d",CONFIG_RESET_GPIO);
+	spi_master_init(&dev, CONFIG_MOSI_GPIO, CONFIG_SCLK_GPIO, CONFIG_CS_GPIO, CONFIG_DC_GPIO, CONFIG_RESET_GPIO);
+#endif // CONFIG_SPI_INTERFACE
+
+#if CONFIG_FLIP
+	dev._flip = true;
+	ESP_LOGW(tag, "Flip upside down");
+#endif
+
+#if CONFIG_SSD1306_128x64
+	ESP_LOGI(tag, "Panel is 128x64");
+	ssd1306_init(&dev, 128, 64);
+#endif // CONFIG_SSD1306_128x64
+#if CONFIG_SSD1306_128x32
+	ESP_LOGI(tag, "Panel is 128x32");
+	ssd1306_init(&dev, 128, 32);
+#endif // CONFIG_SSD1306_128x32
+
+	while(1) {
+		ssd1306_clear_screen(&dev, false);
+		ssd1306_contrast(&dev, 0xff);
+		ssd1306_display_text_box1(&dev, 0, 48, "ABCDEFGHIJKLMNOPQRSTUVWXYZ", 4, 4, false, 100);
+		ssd1306_display_text_box1(&dev, 0, 48, "ABCDEFGHIJKLMNOPQRSTUVWXYZ", 4, 26, false, 2);
+		ssd1306_display_text_box1(&dev, 1, 32, "ABCDEFGHIJKLMNOPQRSTUVWXYZ", 8, 8, false, 100);
+		ssd1306_display_text_box1(&dev, 1, 32, "ABCDEFGHIJKLMNOPQRSTUVWXYZ", 8, 26, false, 3);
+		ssd1306_display_text_box1(&dev, 2, 16, "ABCDEFGHIJKLMNOPQRSTUVWXYZ",12, 12, false, 100);
+		ssd1306_display_text_box1(&dev, 2, 16, "ABCDEFGHIJKLMNOPQRSTUVWXYZ",12, 26, false, 4);
+		ssd1306_display_text_box1(&dev, 3,  0, "ABCDEFGHIJKLMNOPQRSTUVWXYZ",16, 16, false, 100);
+		ssd1306_display_text_box1(&dev, 3,  0, "ABCDEFGHIJKLMNOPQRSTUVWXYZ",16, 26, false, 5);
+		vTaskDelay(100);
+
+#if CONFIG_SSD1306_128x64
+		ssd1306_display_text_box2(&dev, 4, 48, "ABCDEFGHIJKLMNOPQRSTUVWXYZ", 4, 26, false, 2);
+		ssd1306_display_text_box2(&dev, 5, 32, "ABCDEFGHIJKLMNOPQRSTUVWXYZ", 8, 26, false, 2);
+		ssd1306_display_text_box2(&dev, 6, 16, "ABCDEFGHIJKLMNOPQRSTUVWXYZ",12, 26, false, 2);
+		ssd1306_display_text_box2(&dev, 7,  0, "ABCDEFGHIJKLMNOPQRSTUVWXYZ",16, 26, false, 2);
+		vTaskDelay(100);
+#endif
+	} // end while
+}

TextBoxDemo/sdkconfig.defaults

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+#
+# ESP32-specific
+#
+CONFIG_ESP32_DEFAULT_CPU_FREQ_240=y
+CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ=240
+
+#
+# ESP32S2-specific
+#
+CONFIG_ESP32S2_DEFAULT_CPU_FREQ_240=y
+CONFIG_ESP32S2_DEFAULT_CPU_FREQ_MHZ=240
+
+#
+# ESP32S3-specific
+#
+CONFIG_ESP32S3_DEFAULT_CPU_FREQ_240=y
+CONFIG_ESP32S3_DEFAULT_CPU_FREQ_MHZ=240
+