epaper
Dependents: epaper_mbed_test_copy1
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EPD.h@0:fedcef5319f5, 2013-11-09 (annotated)
- Committer:
- dreschpe
- Date:
- Sat Nov 09 23:37:43 2013 +0000
- Revision:
- 0:fedcef5319f5
Lib for using a E-Paper display from Pervasive Displays.; There is a interface board from Embedded Artists.; It can handle graphic and text drawing and is using external fonts.
Who changed what in which revision?
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dreschpe | 0:fedcef5319f5 | 1 | // Copyright 2013 Pervasive Displays, Inc. |
dreschpe | 0:fedcef5319f5 | 2 | // |
dreschpe | 0:fedcef5319f5 | 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
dreschpe | 0:fedcef5319f5 | 4 | // you may not use this file except in compliance with the License. |
dreschpe | 0:fedcef5319f5 | 5 | // You may obtain a copy of the License at: |
dreschpe | 0:fedcef5319f5 | 6 | // |
dreschpe | 0:fedcef5319f5 | 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
dreschpe | 0:fedcef5319f5 | 8 | // |
dreschpe | 0:fedcef5319f5 | 9 | // Unless required by applicable law or agreed to in writing, |
dreschpe | 0:fedcef5319f5 | 10 | // software distributed under the License is distributed on an |
dreschpe | 0:fedcef5319f5 | 11 | // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either |
dreschpe | 0:fedcef5319f5 | 12 | // express or implied. See the License for the specific language |
dreschpe | 0:fedcef5319f5 | 13 | // governing permissions and limitations under the License. |
dreschpe | 0:fedcef5319f5 | 14 | |
dreschpe | 0:fedcef5319f5 | 15 | #ifndef EPD_H |
dreschpe | 0:fedcef5319f5 | 16 | #define EPD_H |
dreschpe | 0:fedcef5319f5 | 17 | |
dreschpe | 0:fedcef5319f5 | 18 | #include "mbed.h" |
dreschpe | 0:fedcef5319f5 | 19 | #include "BurstSPI.h" |
dreschpe | 0:fedcef5319f5 | 20 | |
dreschpe | 0:fedcef5319f5 | 21 | #define PROGMEM |
dreschpe | 0:fedcef5319f5 | 22 | |
dreschpe | 0:fedcef5319f5 | 23 | |
dreschpe | 0:fedcef5319f5 | 24 | typedef enum { |
dreschpe | 0:fedcef5319f5 | 25 | EPD_1_44, // 128 x 96 |
dreschpe | 0:fedcef5319f5 | 26 | EPD_2_0, // 200 x 96 |
dreschpe | 0:fedcef5319f5 | 27 | EPD_2_7 // 264 x 176 |
dreschpe | 0:fedcef5319f5 | 28 | } EPD_size; |
dreschpe | 0:fedcef5319f5 | 29 | |
dreschpe | 0:fedcef5319f5 | 30 | typedef enum { // Image pixel -> Display pixel |
dreschpe | 0:fedcef5319f5 | 31 | EPD_compensate, // B -> W, W -> B (Current Image) |
dreschpe | 0:fedcef5319f5 | 32 | EPD_white, // B -> N, W -> W (Current Image) |
dreschpe | 0:fedcef5319f5 | 33 | EPD_inverse, // B -> N, W -> B (New Image) |
dreschpe | 0:fedcef5319f5 | 34 | EPD_normal // B -> B, W -> W (New Image) |
dreschpe | 0:fedcef5319f5 | 35 | } EPD_stage; |
dreschpe | 0:fedcef5319f5 | 36 | |
dreschpe | 0:fedcef5319f5 | 37 | typedef void EPD_reader(void *buffer, uint32_t address, uint16_t length); |
dreschpe | 0:fedcef5319f5 | 38 | |
dreschpe | 0:fedcef5319f5 | 39 | class EPD_Class { |
dreschpe | 0:fedcef5319f5 | 40 | private: |
dreschpe | 0:fedcef5319f5 | 41 | DigitalOut EPD_Pin_PANEL_ON; |
dreschpe | 0:fedcef5319f5 | 42 | DigitalOut EPD_Pin_BORDER; |
dreschpe | 0:fedcef5319f5 | 43 | DigitalOut EPD_Pin_DISCHARGE; |
dreschpe | 0:fedcef5319f5 | 44 | PwmOut EPD_Pin_PWM; |
dreschpe | 0:fedcef5319f5 | 45 | DigitalOut EPD_Pin_RESET; |
dreschpe | 0:fedcef5319f5 | 46 | DigitalIn EPD_Pin_BUSY; |
dreschpe | 0:fedcef5319f5 | 47 | DigitalOut EPD_Pin_EPD_CS; |
dreschpe | 0:fedcef5319f5 | 48 | BurstSPI spi_; |
dreschpe | 0:fedcef5319f5 | 49 | |
dreschpe | 0:fedcef5319f5 | 50 | EPD_size size; |
dreschpe | 0:fedcef5319f5 | 51 | uint16_t stage_time; |
dreschpe | 0:fedcef5319f5 | 52 | uint16_t factored_stage_time; |
dreschpe | 0:fedcef5319f5 | 53 | uint16_t lines_per_display; |
dreschpe | 0:fedcef5319f5 | 54 | uint16_t dots_per_line; |
dreschpe | 0:fedcef5319f5 | 55 | uint16_t bytes_per_line; |
dreschpe | 0:fedcef5319f5 | 56 | uint16_t bytes_per_scan; |
dreschpe | 0:fedcef5319f5 | 57 | PROGMEM const uint8_t *gate_source; |
dreschpe | 0:fedcef5319f5 | 58 | uint16_t gate_source_length; |
dreschpe | 0:fedcef5319f5 | 59 | PROGMEM const uint8_t *channel_select; |
dreschpe | 0:fedcef5319f5 | 60 | uint16_t channel_select_length; |
dreschpe | 0:fedcef5319f5 | 61 | |
dreschpe | 0:fedcef5319f5 | 62 | bool filler; |
dreschpe | 0:fedcef5319f5 | 63 | |
dreschpe | 0:fedcef5319f5 | 64 | void SPI_put(uint8_t c); |
dreschpe | 0:fedcef5319f5 | 65 | void SPI_put_wait(uint8_t c, DigitalIn busy_pin); |
dreschpe | 0:fedcef5319f5 | 66 | void SPI_send(DigitalOut cs_pin, const uint8_t *buffer, uint16_t length); |
dreschpe | 0:fedcef5319f5 | 67 | |
dreschpe | 0:fedcef5319f5 | 68 | public: |
dreschpe | 0:fedcef5319f5 | 69 | // power up and power down the EPD panel |
dreschpe | 0:fedcef5319f5 | 70 | void begin(); |
dreschpe | 0:fedcef5319f5 | 71 | void end(); |
dreschpe | 0:fedcef5319f5 | 72 | |
dreschpe | 0:fedcef5319f5 | 73 | void setFactor(int temperature = 25) { |
dreschpe | 0:fedcef5319f5 | 74 | this->factored_stage_time = this->stage_time * this->temperature_to_factor_10x(temperature) / 10; |
dreschpe | 0:fedcef5319f5 | 75 | } |
dreschpe | 0:fedcef5319f5 | 76 | |
dreschpe | 0:fedcef5319f5 | 77 | // clear display (anything -> white) |
dreschpe | 0:fedcef5319f5 | 78 | void clear() { |
dreschpe | 0:fedcef5319f5 | 79 | this->frame_fixed_repeat(0xff, EPD_compensate); |
dreschpe | 0:fedcef5319f5 | 80 | this->frame_fixed_repeat(0xff, EPD_white); |
dreschpe | 0:fedcef5319f5 | 81 | this->frame_fixed_repeat(0xaa, EPD_inverse); |
dreschpe | 0:fedcef5319f5 | 82 | this->frame_fixed_repeat(0xaa, EPD_normal); |
dreschpe | 0:fedcef5319f5 | 83 | } |
dreschpe | 0:fedcef5319f5 | 84 | |
dreschpe | 0:fedcef5319f5 | 85 | // assuming a clear (white) screen output an image (PROGMEM data) |
dreschpe | 0:fedcef5319f5 | 86 | void image(const uint8_t *image) { |
dreschpe | 0:fedcef5319f5 | 87 | this->frame_fixed_repeat(0xaa, EPD_compensate); |
dreschpe | 0:fedcef5319f5 | 88 | this->frame_fixed_repeat(0xaa, EPD_white); |
dreschpe | 0:fedcef5319f5 | 89 | this->frame_data_repeat(image, EPD_inverse); |
dreschpe | 0:fedcef5319f5 | 90 | this->frame_data_repeat(image, EPD_normal); |
dreschpe | 0:fedcef5319f5 | 91 | } |
dreschpe | 0:fedcef5319f5 | 92 | |
dreschpe | 0:fedcef5319f5 | 93 | // change from old image to new image (PROGMEM data) |
dreschpe | 0:fedcef5319f5 | 94 | void image(const uint8_t *old_image, const uint8_t *new_image) { |
dreschpe | 0:fedcef5319f5 | 95 | this->frame_data_repeat(old_image, EPD_compensate); |
dreschpe | 0:fedcef5319f5 | 96 | this->frame_data_repeat(old_image, EPD_white); |
dreschpe | 0:fedcef5319f5 | 97 | this->frame_data_repeat(new_image, EPD_inverse); |
dreschpe | 0:fedcef5319f5 | 98 | this->frame_data_repeat(new_image, EPD_normal); |
dreschpe | 0:fedcef5319f5 | 99 | } |
dreschpe | 0:fedcef5319f5 | 100 | |
dreschpe | 0:fedcef5319f5 | 101 | #if defined(EPD_ENABLE_EXTRA_SRAM) |
dreschpe | 0:fedcef5319f5 | 102 | |
dreschpe | 0:fedcef5319f5 | 103 | // change from old image to new image (SRAM version) |
dreschpe | 0:fedcef5319f5 | 104 | void image_sram(const uint8_t *old_image, const uint8_t *new_image) { |
dreschpe | 0:fedcef5319f5 | 105 | this->frame_sram_repeat(old_image, EPD_compensate); |
dreschpe | 0:fedcef5319f5 | 106 | this->frame_sram_repeat(old_image, EPD_white); |
dreschpe | 0:fedcef5319f5 | 107 | this->frame_sram_repeat(new_image, EPD_inverse); |
dreschpe | 0:fedcef5319f5 | 108 | this->frame_sram_repeat(new_image, EPD_normal); |
dreschpe | 0:fedcef5319f5 | 109 | } |
dreschpe | 0:fedcef5319f5 | 110 | #endif |
dreschpe | 0:fedcef5319f5 | 111 | |
dreschpe | 0:fedcef5319f5 | 112 | // Low level API calls |
dreschpe | 0:fedcef5319f5 | 113 | // =================== |
dreschpe | 0:fedcef5319f5 | 114 | |
dreschpe | 0:fedcef5319f5 | 115 | // single frame refresh |
dreschpe | 0:fedcef5319f5 | 116 | void frame_fixed(uint8_t fixed_value, EPD_stage stage); |
dreschpe | 0:fedcef5319f5 | 117 | void frame_data(const uint8_t *new_image, EPD_stage stage); |
dreschpe | 0:fedcef5319f5 | 118 | #if defined(EPD_ENABLE_EXTRA_SRAM) |
dreschpe | 0:fedcef5319f5 | 119 | void frame_sram(const uint8_t *new_image, EPD_stage stage); |
dreschpe | 0:fedcef5319f5 | 120 | #endif |
dreschpe | 0:fedcef5319f5 | 121 | void frame_cb(uint32_t address, EPD_reader *reader, EPD_stage stage); |
dreschpe | 0:fedcef5319f5 | 122 | |
dreschpe | 0:fedcef5319f5 | 123 | // stage_time frame refresh |
dreschpe | 0:fedcef5319f5 | 124 | void frame_fixed_repeat(uint8_t fixed_value, EPD_stage stage); |
dreschpe | 0:fedcef5319f5 | 125 | void frame_data_repeat(const uint8_t *new_image, EPD_stage stage); |
dreschpe | 0:fedcef5319f5 | 126 | #if defined(EPD_ENABLE_EXTRA_SRAM) |
dreschpe | 0:fedcef5319f5 | 127 | void frame_sram_repeat(const uint8_t *new_image, EPD_stage stage); |
dreschpe | 0:fedcef5319f5 | 128 | #endif |
dreschpe | 0:fedcef5319f5 | 129 | void frame_cb_repeat(uint32_t address, EPD_reader *reader, EPD_stage stage); |
dreschpe | 0:fedcef5319f5 | 130 | |
dreschpe | 0:fedcef5319f5 | 131 | // convert temperature to compensation factor |
dreschpe | 0:fedcef5319f5 | 132 | int temperature_to_factor_10x(int temperature); |
dreschpe | 0:fedcef5319f5 | 133 | |
dreschpe | 0:fedcef5319f5 | 134 | // single line display - very low-level |
dreschpe | 0:fedcef5319f5 | 135 | // also has to handle AVR progmem |
dreschpe | 0:fedcef5319f5 | 136 | void line(uint16_t line, const uint8_t *data, uint8_t fixed_value, bool read_progmem, EPD_stage stage); |
dreschpe | 0:fedcef5319f5 | 137 | |
dreschpe | 0:fedcef5319f5 | 138 | // inline static void attachInterrupt(); |
dreschpe | 0:fedcef5319f5 | 139 | // inline static void detachInterrupt(); |
dreschpe | 0:fedcef5319f5 | 140 | |
dreschpe | 0:fedcef5319f5 | 141 | EPD_Class(EPD_size size, |
dreschpe | 0:fedcef5319f5 | 142 | PinName panel_on_pin, |
dreschpe | 0:fedcef5319f5 | 143 | PinName border_pin, |
dreschpe | 0:fedcef5319f5 | 144 | PinName discharge_pin, |
dreschpe | 0:fedcef5319f5 | 145 | PinName pwm_pin, |
dreschpe | 0:fedcef5319f5 | 146 | PinName reset_pin, |
dreschpe | 0:fedcef5319f5 | 147 | PinName busy_pin, |
dreschpe | 0:fedcef5319f5 | 148 | PinName chip_select_pin, |
dreschpe | 0:fedcef5319f5 | 149 | PinName mosi, |
dreschpe | 0:fedcef5319f5 | 150 | PinName miso, |
dreschpe | 0:fedcef5319f5 | 151 | PinName sck); |
dreschpe | 0:fedcef5319f5 | 152 | |
dreschpe | 0:fedcef5319f5 | 153 | }; |
dreschpe | 0:fedcef5319f5 | 154 | |
dreschpe | 0:fedcef5319f5 | 155 | #endif |
dreschpe | 0:fedcef5319f5 | 156 |