Display: first text on OLED.
Note by Traumflug: this code was written by Ruslan Popov a lot earlier already. I picked it to i2c_test.c to get "something" visible running. This is the commit finally adjusted to the new display infrastructure.
This commit is contained in:
Ruslan Popov
Markus Hitter
parent
5f95784c0b
commit
e3fd9eaea7
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@ -0,0 +1,114 @@
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/** \file
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\brief Code specific to the SSD1306 display.
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*/
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#include "display_ssd1306.h"
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#ifdef DISPLAY_TYPE_SSD1306
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#include "displaybus.h"
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#include "font.h"
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static const uint8_t PROGMEM init_sequence[] = {
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0x00, // Command marker.
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0xAE, // Display off.
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0xD5, 0x80, // Display clock divider (reset).
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0xA8, 0x1F, // 1/32 duty.
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0x40 | 0x00, // Start line (reset).
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0x20, 0x02, // Page addressing mode (reset).
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0x22, 0x00, 0x03, // Start and end page in horiz./vert. addressing mode[1].
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0x21, 0x00, 0x7F, // Start and end column in horiz./vert. addressing mode.
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0xA0 | 0x00, // No segment remap (reset).
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0xC0 | 0x00, // Normal com pins mapping (reset).
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0xDA, 0x02, // Sequental without remap com pins.
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0x81, 0x7F, // Contrast (reset).
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0xDB, 0x20, // Vcomh (reset).
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0xD9, 0xF1, // Precharge period.
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0x8D, 0x14, // Charge pump.
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0xA6, // Positive display.
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0xA4, // Resume display.
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0xAF // Display on.
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};
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// [1] Do not set this to 0x00..0x07 on a 32 pixel high display, or vertical
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// addressing mode will mess up. 32 pixel high displays have only 4 pages
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// (0..3), still addressing logic accepts, but can't deal with the 0..7
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// meant for 64 pixel high displays.
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/**
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* Initializes the display's controller configuring the way of
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* displaying data.
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*/
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void display_init(void) {
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uint8_t i;
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displaybus_init(DISPLAY_I2C_ADDRESS);
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for (i = 0; i < sizeof(init_sequence); i++) {
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// Send last byte with 'last_byte' set.
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displaybus_write(init_sequence[i], (i == sizeof(init_sequence) - 1));
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}
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}
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/**
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Clear the screen. As this display supports many sophisticated commands,
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but not a simple 'clear', we have to overwrite the entire memory with
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zeros, byte by byte.
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*/
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void display_clear(void) {
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uint16_t i;
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// Set horizontal adressing mode.
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displaybus_write(0x00, 0);
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displaybus_write(0x20, 0);
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displaybus_write(0x00, 1);
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// Write 512 zeros.
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displaybus_write(0x40, 0);
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for (i = 0; i < 512; i++) {
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displaybus_write(0x00, (i == 511));
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}
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// Return to page adressing mode.
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displaybus_write(0x00, 0);
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displaybus_write(0x20, 0);
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displaybus_write(0x02, 1);
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}
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/**
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Prints the text at a given position.
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*/
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void display_text_P(uint8_t line, uint8_t column, PGM_P message) {
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uint8_t i;
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// Enter command mode.
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displaybus_write(0x00, 0);
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// Set line.
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displaybus_write(0xB0 | (line & 0x03), 0);
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// Set column.
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displaybus_write(0x00 | (column & 0x0F), 0);
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displaybus_write(0x10 | ((column >> 4) & 0x0F), 1);
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// Render text to bitmap to display.
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displaybus_write(0x40, 0);
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while (pgm_read_byte(message)) {
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uint8_t index = pgm_read_byte(message) - 0x20;
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// Send the character bitmap.
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for (i = 0; i < pgm_read_byte(&font[index].columns); i++) {
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displaybus_write(pgm_read_byte(&font[index].data[i]), 0);
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}
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// Send space between characters.
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for (i = 0; i < FONT_SYMBOL_SPACE; i++) {
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displaybus_write(0x00, 0);
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}
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message++;
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}
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// Send another space for transmission end.
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displaybus_write(0x00, 1);
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}
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#endif /* DISPLAY_TYPE_SSD1306 */
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@ -0,0 +1,56 @@
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#ifndef _DISPLAY_SSD1306_H
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#define _DISPLAY_SSD1306_H
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#include "config_wrapper.h"
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#ifdef DISPLAY_TYPE_SSD1306
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#define DISPLAY
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#define DISPLAY_I2C_ADDRESS (0x3C << 1)
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#define DISPLAY_LINES 4
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#define DISPLAY_SYMBOLS_PER_LINE 16
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#define HOTENDS_COUNT 1
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#define HOTBED_ZONES 1
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#define DISPLAY_PLACE_HOTEND 0, 0, 8
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#define DISPLAY_PLACE_HOTBED 0, 8, 8
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#define DISPLAY_PLACE_X 1, 0, 5
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#define DISPLAY_PLACE_Y 1, 5, 5
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#define DISPLAY_PLACE_Z 1, 10, 5
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#define DISPLAY_PLACE_FEEDRATE 2, 0, 5
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#define DISPLAY_PLACE_PROGRESS 2, 5, 5
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#define DISPLAY_PLACE_TIMER 2, 10, 6
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#define DISPLAY_PLACE_STATUS 3, 0, 16
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typedef struct {
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uint16_t hotend_temp[HOTENDS_COUNT];
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uint16_t hotbed_temp[HOTBED_ZONES];
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uint16_t x;
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uint16_t y;
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uint16_t z;
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uint16_t feedrate;
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uint8_t progress; // in percents
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uint32_t timer; // in seconds
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} DISPLAY_T;
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void display_init(void);
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void display_on(void);
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void display_hotend(uint8_t index);
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void display_hotbed(uint8_t index);
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void display_point(uint16_t x, uint16_t y, uint16_t z);
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void display_feedrate(uint16_t value);
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void display_progress(uint8_t value);
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void display_timer(uint32_t value);
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void display_off(void);
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void display_clear(void);
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void display_text_P(uint8_t line, uint8_t column, PGM_P message_P);
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#endif /* DISPLAY_TYPE_SSD1306 */
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#endif /* _DISPLAY_SSD1306_H */
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87
i2c_test.c
87
i2c_test.c
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@ -15,99 +15,16 @@
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#include <string.h>
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#include "config_wrapper.h"
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#include "displaybus.h"
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#include "display_ssd1306.h"
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#include "font.h"
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#define DISPLAY_I2C_ADDRESS (0x3C << 1)
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const uint8_t PROGMEM display_init[] = {
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0x00, // Command marker.
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0xAE, // Display off.
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0xD5, 0x80, // Display clock divider (reset).
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0xA8, 0x1F, // 1/32 duty.
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0x40 | 0x00, // Start line (reset).
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0x20, 0x02, // Page addressing mode (reset).
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0x22, 0x00, 0x03, // Start and end page in horiz./vert. addressing mode[1].
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0x21, 0x00, 0x7F, // Start and end column in horiz./vert. addressing mode.
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0xA0 | 0x00, // No segment remap (reset).
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0xC0 | 0x00, // Normal com pins mapping (reset).
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0xDA, 0x02, // Sequental without remap com pins.
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0x81, 0x7F, // Contrast (reset).
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0xDB, 0x20, // Vcomh (reset).
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0xD9, 0xF1, // Precharge period.
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0x8D, 0x14, // Charge pump.
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0xA6, // Positive display.
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0xA4, // Resume display.
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0xAF // Display on.
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};
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// [1] Do not set this to 0x00..0x07 on a 32 pixel high display, or vertical
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// addressing mode will mess up. 32 pixel high displays have only 4 pages
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// (0..3), still addressing logic accepts, but can't deal with the 0..7
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// meant for 64 pixel high displays.
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static void i2c_test(void) {
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uint16_t i;
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const char* message = "Welcome to Teacup";
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for (i = 0; i < sizeof(display_init); i++) {
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// Send last byte with 'last_byte' set.
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displaybus_write(pgm_read_byte(&display_init[i]),
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(i == sizeof(display_init) - 1));
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}
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/**
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Clear the screen. As this display supports many sophisticated commands,
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but not a simple 'clear', we have to overwrite the entire memory with
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zeros, byte by byte.
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*/
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// Set horizontal adressing mode.
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displaybus_write(0x00, 0);
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displaybus_write(0x20, 0);
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displaybus_write(0x00, 1);
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// Write 512 zeros.
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displaybus_write(0x40, 0);
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for (i = 0; i < 512; i++) {
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displaybus_write(0x00, (i == 511));
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}
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// Return to page adressing mode.
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displaybus_write(0x00, 0);
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displaybus_write(0x20, 0);
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displaybus_write(0x02, 1);
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/**
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Setup cursor on display.
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"Welcome to Teacup" is 64 pixel columns wide, entire display is
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128 columns, so we offset by 32 columns to get it to the center.
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*/
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displaybus_write(0x00, 0);
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// Line 1.
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displaybus_write(0xB0 | 1, 0);
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// Column 32.
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displaybus_write(0x00 | (32 & 0x0F), 0);
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displaybus_write(0x10 | ((32 >> 4) & 0x0F), 1);
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// Render text to bitmap to display.
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displaybus_write(0x40, 0);
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while (*message) {
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uint8_t index = (uint8_t)*message - 0x20;
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// Send the character bitmap.
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for (i = 0; i < pgm_read_byte(&font[index].columns); i++) {
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displaybus_write(pgm_read_byte(&font[index].data[i]), 0);
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}
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// Send space between characters.
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for (i = 0; i < FONT_SYMBOL_SPACE; i++) {
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displaybus_write(0x00, 0);
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}
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message++;
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}
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// Send another space for transmission end.
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displaybus_write(0x00, 1);
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display_text_P(1, 32, PSTR("Welcome to Teacup"));
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}
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#endif /* I2C_TEST */
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19
mendel.c
19
mendel.c
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@ -32,7 +32,7 @@
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#include "config_wrapper.h"
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#ifdef I2C
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// This is temporary, until display code is completed.
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// It includes static i2c_test(), which is called in main():
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// It includes static i2c_test(), which is called in init():
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#define I2C_TEST
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#include "i2c_test.c"
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#undef I2C_TEST
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@ -51,8 +51,8 @@
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#include "clock.h"
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#include "intercom.h"
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#include "spi.h"
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#include "displaybus.h"
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#include "sd.h"
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#include "display_ssd1306.h"
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#include "simulator.h"
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#ifdef SIMINFO
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@ -95,10 +95,6 @@ void init(void) {
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spi_init();
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#endif
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#ifdef DISPLAY_BUS
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displaybus_init(DISPLAY_I2C_ADDRESS);
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#endif
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// set up timers
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timer_init();
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@ -127,6 +123,12 @@ void init(void) {
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// prepare the power supply
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power_init();
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#ifdef DISPLAY
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display_init();
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display_clear();
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i2c_test();
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#endif
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// say hi to host
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serial_writestr_P(PSTR("start\nok\n"));
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@ -147,11 +149,6 @@ int main (void)
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init();
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#ifdef DISPLAY_BUS
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// This is temporary, until display code is completed.
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i2c_test();
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#endif
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// main loop
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for (;;)
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{
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