Electronics
DIT Adafruit_FeatherWing_OLED.c
The source code can be found on GitHub.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 | /** \file Adafruit_FeatherWing_OLED.c \brief Adafruit FeatherWing OLED driver implementation \license MIT: The MIT License (https://opensource.org/licenses/MIT) . Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: . The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. . THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. \copyright DIT: 2017; Drechsler Information Technologies; www.drechsler-it.de \authors jrgdre: Joerg Drechsler; DIT \versions 1.1.0: 2017-12-23 jrgdre use ssd1306 library 1.0.0: 2017-06-22 jrgdre initial release */ #include "Adafruit_FeatherWing_OLED.h" #include "Com_Driver_i2c_master.h" // FeatherWing_OLED uses I2C to communicate with the MCU #include "SSD1306.h" // FeatherWing_OLED uses an SSD1306 OLED controller IC /** * FeatherWingOLED's SSD1306 global configuration data structure instance * with default configuration. */ // The initialization will cause a compiler warning, despite the code being correct. // This is a known as GCC bug 53119. static struct SSD1306 featherWing_oled = { .com_driver = NULL, .address = ADAFRUIT_FEATHERWING_OLED_I2C_ADDRESS, .geometry = SSD1306_GEOMETRY_128x32, .charge_pump_source = SSD1306_CHARGE_PUMP_SOURCE_INTERNAL_VCC, .flip_horizontal = true, .flip_vertical = true }; /************************************************************************/ /* local functions */ /************************************************************************/ /** * \brief Button A event handler. * * Event handler called, every time button A on the FeatherWing_OLED was * pressed or released. */ static void button_a_on_detect( void ) { if( !port_pin_get_input_level( BUTTON_A_PIN ) ){ if( featherWing_oled_buttons_event_handlers.button_a_on_pressed != NULL ){ featherWing_oled_buttons_event_handlers.button_a_on_pressed(); } } else { if( featherWing_oled_buttons_event_handlers.button_a_on_released != NULL ){ featherWing_oled_buttons_event_handlers.button_a_on_released(); } } } /** * \brief Button B event handler. * * Event handler called, every time button B on the FeatherWing_OLED was * pressed or released. */ static void button_b_on_detect( void ) { if( !port_pin_get_input_level( BUTTON_B_PIN ) ){ if( featherWing_oled_buttons_event_handlers.button_b_on_pressed != NULL ){ featherWing_oled_buttons_event_handlers.button_b_on_pressed(); } } else { if( featherWing_oled_buttons_event_handlers.button_b_on_released != NULL ){ featherWing_oled_buttons_event_handlers.button_b_on_released(); } } } /** * \brief Button C event handler. * * Event handler called, every time button C on the FeatherWing_OLED was * pressed or released. */ static void button_c_on_detect( void ) { if( !port_pin_get_input_level( BUTTON_C_PIN ) ){ if( featherWing_oled_buttons_event_handlers.button_c_on_pressed != NULL ){ featherWing_oled_buttons_event_handlers.button_c_on_pressed(); } } else { if( featherWing_oled_buttons_event_handlers.button_c_on_released != NULL ){ featherWing_oled_buttons_event_handlers.button_c_on_released(); } } } /************************************************************************/ /* public functions */ /************************************************************************/ /** * \brief Initialize the FeatherWing_OLED display connected to the i2c SERCOM \ref module. */ enum status_code featherWing_OLED_init( struct i2c_master_module *i2c_master_instance //< I2C master this featherWing_OLED is connected to ){ Assert( featherWing_oled.com_driver != NULL ); // link the generic com driver instance to the i2c bus master instance specified com_driver_i2c_master_init( &featherWing_oled.com_driver, i2c_master_instance ); return ssd1306_init( &featherWing_oled ); // initialize the driver chip on the featherWing_OLED } /** * \brief Initialize the FeatherWing_OLED buttons. */ enum status_code featherWing_OLED_init_buttons( ){ enum status_code status; struct extint_chan_conf config_extint_chan; // initialize buttons event handlers management structure featherWing_oled_buttons_event_handlers.button_a_on_pressed = NULL; featherWing_oled_buttons_event_handlers.button_a_on_released = NULL; featherWing_oled_buttons_event_handlers.button_b_on_pressed = NULL; featherWing_oled_buttons_event_handlers.button_b_on_released = NULL; featherWing_oled_buttons_event_handlers.button_c_on_pressed = NULL; featherWing_oled_buttons_event_handlers.button_c_on_released = NULL; // Button A extint_chan_get_config_defaults(&config_extint_chan); config_extint_chan.gpio_pin = BUTTON_A_PIN; config_extint_chan.gpio_pin_mux = BUTTON_A_PIN_MUX; config_extint_chan.gpio_pin_pull = EXTINT_PULL_UP; config_extint_chan.detection_criteria = EXTINT_DETECT_BOTH; config_extint_chan.filter_input_signal = true; extint_chan_set_config( BUTTON_A_EIC_LINE, &config_extint_chan); status = extint_register_callback( &button_a_on_detect, BUTTON_A_EIC_LINE, EXTINT_CALLBACK_TYPE_DETECT ); if( status != STATUS_OK ){ return status; } status = extint_chan_enable_callback( BUTTON_A_EIC_LINE, EXTINT_CALLBACK_TYPE_DETECT ); if( status != STATUS_OK ){ return status; } // Button B extint_chan_get_config_defaults(&config_extint_chan); config_extint_chan.gpio_pin = BUTTON_B_PIN; config_extint_chan.gpio_pin_mux = BUTTON_B_PIN_MUX; config_extint_chan.gpio_pin_pull = EXTINT_PULL_UP; config_extint_chan.detection_criteria = EXTINT_DETECT_BOTH; config_extint_chan.filter_input_signal = false; // has a hardware pull-up resistor of 100k extint_chan_set_config( BUTTON_B_EIC_LINE, &config_extint_chan); status = extint_register_callback( &button_b_on_detect, BUTTON_B_EIC_LINE, EXTINT_CALLBACK_TYPE_DETECT ); if( status != STATUS_OK ){ return status; } status = extint_chan_enable_callback( BUTTON_B_EIC_LINE, EXTINT_CALLBACK_TYPE_DETECT ); if( status != STATUS_OK ){ return status; } // Button C extint_chan_get_config_defaults(&config_extint_chan); config_extint_chan.gpio_pin = BUTTON_C_PIN; config_extint_chan.gpio_pin_mux = BUTTON_C_PIN_MUX; config_extint_chan.gpio_pin_pull = EXTINT_PULL_UP; config_extint_chan.detection_criteria = EXTINT_DETECT_BOTH; config_extint_chan.filter_input_signal = true; extint_chan_set_config( BUTTON_C_EIC_LINE, &config_extint_chan); status = extint_register_callback( &button_c_on_detect, BUTTON_C_EIC_LINE, EXTINT_CALLBACK_TYPE_DETECT ); if( status != STATUS_OK ){ return status; } status = extint_chan_enable_callback( BUTTON_C_EIC_LINE, EXTINT_CALLBACK_TYPE_DETECT ); if( status != STATUS_OK ){ return status; } return STATUS_OK; } /** * \brief Switch the state of the OLED display. * * This function forwards the call to the ssd1306_display_on() function * of the DIT SSD1306 library. */ enum status_code featherWing_OLED_on( bool const value //< if OLED display is to set to the ON state ){ return ssd1306_display_on( &featherWing_oled, value ); } /** * \brief Update only the tiles that have been changed since the last OLED update. * * This function forwards the call to the ssd1306_display_update() function * of the DIT SSD1306 library. */ enum status_code featherWing_OLED_update( struct Framebuffer *const framebuffer //< framebuffer to write to the FeatherWing_OLED ){ return ssd1306_display_update( &featherWing_oled, framebuffer ); } /** * \brief Update all tiles of the OLED with the tiles of the framebuffer, independent of there dirty state. * * This function forwards the call to the ssd1306_display_update_all() function * of the DIT SSD1306 library. */ enum status_code featherWing_OLED_update_all( struct Framebuffer *const framebuffer //< framebuffer to write to the FeatherWing_OLED ){ return ssd1306_display_update_all( &featherWing_oled, framebuffer ); } |