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-rw-r--r--keyboards/lets_split/ssd1306.c470
1 files changed, 470 insertions, 0 deletions
diff --git a/keyboards/lets_split/ssd1306.c b/keyboards/lets_split/ssd1306.c
new file mode 100644
index 0000000000..5c6dff27f8
--- /dev/null
+++ b/keyboards/lets_split/ssd1306.c
@@ -0,0 +1,470 @@
+#ifdef SSD1306OLED
+
+#include "ssd1306.h"
+#include "config.h"
+#include "i2c.h"
+#include <string.h>
+#include "print.h"
+#include "lets_split.h"
+#include "common/glcdfont.c"
+#ifdef ADAFRUIT_BLE_ENABLE
+#include "adafruit_ble.h"
+#endif
+#ifdef PROTOCOL_LUFA
+#include "lufa.h"
+#endif
+#include "sendchar.h"
+#include "pincontrol.h"
+
+//assign the right code to your layers
+#define _BASE 0
+#define _LOWER 8
+#define _RAISE 16
+#define _FNLAYER 64
+#define _NUMLAY 128
+#define _NLOWER 136
+#define _NFNLAYER 192
+#define _MOUSECURSOR 256
+#define _ADJUST 65560
+
+// Set this to 1 to help diagnose early startup problems
+// when testing power-on with ble. Turn it off otherwise,
+// as the latency of printing most of the debug info messes
+// with the matrix scan, causing keys to drop.
+#define DEBUG_TO_SCREEN 0
+
+// Controls the SSD1306 128x32 OLED display via i2c
+
+#define i2cAddress 0x3C
+
+#define DisplayHeight 32
+#define DisplayWidth 128
+
+#define FontHeight 8
+#define FontWidth 6
+
+#define MatrixRows (DisplayHeight / FontHeight)
+#define MatrixCols (DisplayWidth / FontWidth)
+
+struct CharacterMatrix {
+ uint8_t display[MatrixRows][MatrixCols];
+ uint8_t *cursor;
+ bool dirty;
+};
+
+static struct CharacterMatrix display;
+//static uint16_t last_battery_update;
+//static uint32_t vbat;
+//#define BatteryUpdateInterval 10000 /* milliseconds */
+#define ScreenOffInterval 300000 /* milliseconds */
+#if DEBUG_TO_SCREEN
+static uint8_t displaying;
+#endif
+static uint16_t last_flush;
+
+enum ssd1306_cmds {
+ DisplayOff = 0xAE,
+ DisplayOn = 0xAF,
+
+ SetContrast = 0x81,
+ DisplayAllOnResume = 0xA4,
+
+ DisplayAllOn = 0xA5,
+ NormalDisplay = 0xA6,
+ InvertDisplay = 0xA7,
+ SetDisplayOffset = 0xD3,
+ SetComPins = 0xda,
+ SetVComDetect = 0xdb,
+ SetDisplayClockDiv = 0xD5,
+ SetPreCharge = 0xd9,
+ SetMultiPlex = 0xa8,
+ SetLowColumn = 0x00,
+ SetHighColumn = 0x10,
+ SetStartLine = 0x40,
+
+ SetMemoryMode = 0x20,
+ ColumnAddr = 0x21,
+ PageAddr = 0x22,
+
+ ComScanInc = 0xc0,
+ ComScanDec = 0xc8,
+ SegRemap = 0xa0,
+ SetChargePump = 0x8d,
+ ExternalVcc = 0x01,
+ SwitchCapVcc = 0x02,
+
+ ActivateScroll = 0x2f,
+ DeActivateScroll = 0x2e,
+ SetVerticalScrollArea = 0xa3,
+ RightHorizontalScroll = 0x26,
+ LeftHorizontalScroll = 0x27,
+ VerticalAndRightHorizontalScroll = 0x29,
+ VerticalAndLeftHorizontalScroll = 0x2a,
+};
+
+
+// Write command sequence.
+// Returns true on success.
+static inline bool _send_cmd1(uint8_t cmd) {
+ bool res = false;
+
+ if (i2c_start_write(i2cAddress)) {
+ xprintf("failed to start write to %d\n", i2cAddress);
+ goto done;
+ }
+
+ if (i2c_master_write(0x0 /* command byte follows */)) {
+ print("failed to write control byte\n");
+
+ goto done;
+ }
+
+ if (i2c_master_write(cmd)) {
+ xprintf("failed to write command %d\n", cmd);
+ goto done;
+ }
+ res = true;
+done:
+ i2c_master_stop();
+ return res;
+}
+
+// Write 2-byte command sequence.
+// Returns true on success
+static inline bool _send_cmd2(uint8_t cmd, uint8_t opr) {
+ if (!_send_cmd1(cmd)) {
+ return false;
+ }
+ return _send_cmd1(opr);
+}
+
+// Write 3-byte command sequence.
+// Returns true on success
+static inline bool _send_cmd3(uint8_t cmd, uint8_t opr1, uint8_t opr2) {
+ if (!_send_cmd1(cmd)) {
+ return false;
+ }
+ if (!_send_cmd1(opr1)) {
+ return false;
+ }
+ return _send_cmd1(opr2);
+}
+
+#define send_cmd1(c) if (!_send_cmd1(c)) {goto done;}
+#define send_cmd2(c,o) if (!_send_cmd2(c,o)) {goto done;}
+#define send_cmd3(c,o1,o2) if (!_send_cmd3(c,o1,o2)) {goto done;}
+
+static void matrix_clear(struct CharacterMatrix *matrix);
+
+static void clear_display(void) {
+ matrix_clear(&display);
+
+ // Clear all of the display bits (there can be random noise
+ // in the RAM on startup)
+ send_cmd3(PageAddr, 0, (DisplayHeight / 8) - 1);
+ send_cmd3(ColumnAddr, 0, DisplayWidth - 1);
+
+ if (i2c_start_write(i2cAddress)) {
+ goto done;
+ }
+ if (i2c_master_write(0x40)) {
+ // Data mode
+ goto done;
+ }
+ for (uint8_t row = 0; row < MatrixRows; ++row) {
+ for (uint8_t col = 0; col < DisplayWidth; ++col) {
+ i2c_master_write(0);
+ }
+ }
+
+ display.dirty = false;
+
+done:
+ i2c_master_stop();
+}
+
+#if DEBUG_TO_SCREEN
+#undef sendchar
+static int8_t capture_sendchar(uint8_t c) {
+ sendchar(c);
+ iota_gfx_write_char(c);
+
+ if (!displaying) {
+ iota_gfx_flush();
+ }
+ return 0;
+}
+#endif
+
+bool iota_gfx_init(void) {
+ bool success = false;
+
+ send_cmd1(DisplayOff);
+ send_cmd2(SetDisplayClockDiv, 0x80);
+ send_cmd2(SetMultiPlex, DisplayHeight - 1);
+
+ send_cmd2(SetDisplayOffset, 0);
+
+
+ send_cmd1(SetStartLine | 0x0);
+ send_cmd2(SetChargePump, 0x14 /* Enable */);
+ send_cmd2(SetMemoryMode, 0 /* horizontal addressing */);
+
+/// Flips the display orientation 0 degrees
+ send_cmd1(SegRemap | 0x1);
+ send_cmd1(ComScanDec);
+/*
+// the following Flip the display orientation 180 degrees
+ send_cmd1(SegRemap);
+ send_cmd1(ComScanInc);
+// end flip */
+ send_cmd2(SetComPins, 0x2);
+ send_cmd2(SetContrast, 0x8f);
+ send_cmd2(SetPreCharge, 0xf1);
+ send_cmd2(SetVComDetect, 0x40);
+ send_cmd1(DisplayAllOnResume);
+ send_cmd1(NormalDisplay);
+ send_cmd1(DeActivateScroll);
+ send_cmd1(DisplayOn);
+
+ send_cmd2(SetContrast, 0); // Dim
+
+ clear_display();
+
+ success = true;
+
+ iota_gfx_flush();
+
+#if DEBUG_TO_SCREEN
+ print_set_sendchar(capture_sendchar);
+#endif
+
+done:
+ return success;
+}
+
+bool iota_gfx_off(void) {
+ bool success = false;
+
+ send_cmd1(DisplayOff);
+ success = true;
+
+done:
+ return success;
+}
+
+bool iota_gfx_on(void) {
+ bool success = false;
+
+ send_cmd1(DisplayOn);
+ success = true;
+
+done:
+ return success;
+}
+
+static void matrix_write_char_inner(struct CharacterMatrix *matrix, uint8_t c) {
+ *matrix->cursor = c;
+ ++matrix->cursor;
+
+ if (matrix->cursor - &matrix->display[0][0] == sizeof(matrix->display)) {
+ // We went off the end; scroll the display upwards by one line
+ memmove(&matrix->display[0], &matrix->display[1],
+ MatrixCols * (MatrixRows - 1));
+ matrix->cursor = &matrix->display[MatrixRows - 1][0];
+ memset(matrix->cursor, ' ', MatrixCols);
+ }
+}
+
+static void matrix_write_char(struct CharacterMatrix *matrix, uint8_t c) {
+ matrix->dirty = true;
+
+ if (c == '\n') {
+ // Clear to end of line from the cursor and then move to the
+ // start of the next line
+ uint8_t cursor_col = (matrix->cursor - &matrix->display[0][0]) % MatrixCols;
+
+ while (cursor_col++ < MatrixCols) {
+ matrix_write_char_inner(matrix, ' ');
+ }
+ return;
+ }
+
+ matrix_write_char_inner(matrix, c);
+}
+
+void iota_gfx_write_char(uint8_t c) {
+ matrix_write_char(&display, c);
+}
+
+static void matrix_write(struct CharacterMatrix *matrix, const char *data) {
+ const char *end = data + strlen(data);
+ while (data < end) {
+ matrix_write_char(matrix, *data);
+ ++data;
+ }
+}
+
+void iota_gfx_write(const char *data) {
+ matrix_write(&display, data);
+}
+
+static void matrix_write_P(struct CharacterMatrix *matrix, const char *data) {
+ while (true) {
+ uint8_t c = pgm_read_byte(data);
+ if (c == 0) {
+ return;
+ }
+ matrix_write_char(matrix, c);
+ ++data;
+ }
+}
+
+void iota_gfx_write_P(const char *data) {
+ matrix_write_P(&display, data);
+}
+
+static void matrix_clear(struct CharacterMatrix *matrix) {
+ memset(matrix->display, ' ', sizeof(matrix->display));
+ matrix->cursor = &matrix->display[0][0];
+ matrix->dirty = true;
+}
+
+void iota_gfx_clear_screen(void) {
+ matrix_clear(&display);
+}
+
+static void matrix_render(struct CharacterMatrix *matrix) {
+ last_flush = timer_read();
+ iota_gfx_on();
+#if DEBUG_TO_SCREEN
+ ++displaying;
+#endif
+
+ // Move to the home position
+ send_cmd3(PageAddr, 0, MatrixRows - 1);
+ send_cmd3(ColumnAddr, 0, (MatrixCols * FontWidth) - 1);
+
+ if (i2c_start_write(i2cAddress)) {
+ goto done;
+ }
+ if (i2c_master_write(0x40)) {
+ // Data mode
+ goto done;
+ }
+
+ for (uint8_t row = 0; row < MatrixRows; ++row) {
+ for (uint8_t col = 0; col < MatrixCols; ++col) {
+ const uint8_t *glyph = font + (matrix->display[row][col] * (FontWidth - 1));
+
+ for (uint8_t glyphCol = 0; glyphCol < FontWidth - 1; ++glyphCol) {
+ uint8_t colBits = pgm_read_byte(glyph + glyphCol);
+ i2c_master_write(colBits);
+ }
+
+ // 1 column of space between chars (it's not included in the glyph)
+ i2c_master_write(0);
+ }
+ }
+
+ matrix->dirty = false;
+
+done:
+ i2c_master_stop();
+#if DEBUG_TO_SCREEN
+ --displaying;
+#endif
+}
+
+void iota_gfx_flush(void) {
+ matrix_render(&display);
+}
+
+static void matrix_update(struct CharacterMatrix *dest,
+ const struct CharacterMatrix *source) {
+ if (memcmp(dest->display, source->display, sizeof(dest->display))) {
+ memcpy(dest->display, source->display, sizeof(dest->display));
+ dest->dirty = true;
+ }
+}
+
+static void render_status_info(void) {
+#if DEBUG_TO_SCREEN
+ if (debug_enable) {
+ return;
+ }
+#endif
+
+ struct CharacterMatrix matrix;
+
+ matrix_clear(&matrix);
+ matrix_write_P(&matrix, PSTR("USB: "));
+#ifdef PROTOCOL_LUFA
+ switch (USB_DeviceState) {
+ case DEVICE_STATE_Unattached:
+ matrix_write_P(&matrix, PSTR("Unattached"));
+ break;
+ case DEVICE_STATE_Suspended:
+ matrix_write_P(&matrix, PSTR("Suspended"));
+ break;
+ case DEVICE_STATE_Configured:
+ matrix_write_P(&matrix, PSTR("Connected"));
+ break;
+ case DEVICE_STATE_Powered:
+ matrix_write_P(&matrix, PSTR("Powered"));
+ break;
+ case DEVICE_STATE_Default:
+ matrix_write_P(&matrix, PSTR("Default"));
+ break;
+ case DEVICE_STATE_Addressed:
+ matrix_write_P(&matrix, PSTR("Addressed"));
+ break;
+ default:
+ matrix_write_P(&matrix, PSTR("Invalid"));
+ }
+#endif
+
+// Define layers here, Have not worked out how to have text displayed for each layer. Copy down the number you see and add a case for it below
+
+ char buf[40];
+ snprintf(buf,sizeof(buf), "Undef-%ld", layer_state);
+ matrix_write_P(&matrix, PSTR("\n\nLayer: "));
+ switch (layer_state) {
+ case _BASE:
+ matrix_write_P(&matrix, PSTR("Default"));
+ break;
+ case _RAISE:
+ matrix_write_P(&matrix, PSTR("Raise"));
+ break;
+ case _LOWER:
+ matrix_write_P(&matrix, PSTR("Lower"));
+ break;
+ case _ADJUST:
+ matrix_write_P(&matrix, PSTR("ADJUST"));
+ break;
+ default:
+ matrix_write(&matrix, buf);
+ }
+
+ // Host Keyboard LED Status
+ char led[40];
+ snprintf(led, sizeof(led), "\n%s %s %s",
+ (host_keyboard_leds() & (1<<USB_LED_NUM_LOCK)) ? "NUMLOCK" : " ",
+ (host_keyboard_leds() & (1<<USB_LED_CAPS_LOCK)) ? "CAPS" : " ",
+ (host_keyboard_leds() & (1<<USB_LED_SCROLL_LOCK)) ? "SCLK" : " ");
+ matrix_write(&matrix, led);
+ matrix_update(&display, &matrix);
+}
+
+void iota_gfx_task(void) {
+ render_status_info();
+
+ if (display.dirty) {
+ iota_gfx_flush();
+ }
+
+ if (timer_elapsed(last_flush) > ScreenOffInterval) {
+ iota_gfx_off();
+ }
+}
+#endif
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