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ugfx/drivers/gdisp/WS29EPD/gdisp_lld_WS29EPD.c

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/*
* This file is subject to the terms of the GFX License. If a copy of
* the license was not distributed with this file, you can obtain one at:
*
* http://ugfx.io/license.html
*/
#include "gfx.h"
#if GFX_USE_GDISP
#define GDISP_DRIVER_VMT GDISPVMT_WS29EPD
#include "gdisp_lld_config.h"
#include "../../../src/gdisp/gdisp_driver.h"
#include "board_WS29EPD.h"
#include "WS29EPD.h"
/*===========================================================================*/
/* Driver local definitions. */
/*===========================================================================*/
#ifndef GDISP_SCREEN_HEIGHT
#define GDISP_SCREEN_HEIGHT 296
#endif
#ifndef GDISP_SCREEN_WIDTH
#define GDISP_SCREEN_WIDTH 128
#endif
/* Every data byte determines 8 pixels. */
#ifndef WS29EPD_PPB
#define WS29EPD_PPB 8
#endif
/*===========================================================================*/
/* Driver local variables. */
/*===========================================================================*/
/* initialization variables according to WaveShare. */
gU8 GDOControl[] = {(GDISP_SCREEN_HEIGHT-1)%256,(GDISP_SCREEN_HEIGHT-1)/256,0x00};
gU8 softstart[] = {0xd7,0xd6,0x9d};
gU8 LUTDefault_full[] = {0x02,0x02,0x01,0x11,0x12,0x12,0x22,0x22,0x66,0x69,0x69,0x59,0x58,0x99,0x99,0x88,0x00,0x00,0x00,0x00,0xF8,0xB4,0x13,0x51,0x35,0x51,0x51,0x19,0x01,0x00}; // Initialize the full display
/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
LLDSPEC gBool gdisp_lld_init(GDisplay *g) {
/* Use the private area as a frame buffer.
*
* The frame buffer will be one big array of bytes storing all the pixels with WS29EPD_PPB pixel per byte.
* For the layout, the frame will be stored line by line in the x-direction.
* So: [Line x=0][Line x=1][Line x=2] ... [Line x=GDISP_SCREEN_WIDTH/WS29EPD_PPB]
* And every x-line contains GDISP_SCREEN_HEIGHT y-values:
* [y=0; y=1; y=2; y=3; ...; y=GDISP_SCREEN_HEIGHT][y=0; y=1; y=2; y=3; ...; y=GDISP_SCREEN_HEIGHT]...
*
*/
g->priv = gfxAlloc((GDISP_SCREEN_WIDTH / WS29EPD_PPB) * GDISP_SCREEN_HEIGHT * sizeof(gU8));
if (!g->priv)
return gFalse;
/* Initialize the LL hardware. */
init_board(g);
/* Hardware reset. */
setpin_reset(g, gFalse);
gfxSleepMilliseconds(100);
setpin_reset(g, gTrue);
gfxSleepMilliseconds(100);
/* Acquire the bus for the whole initialization. */
acquire_bus(g);
/* Send the initialization commands. (according to WaveShare) */
write_reg_data(g, DRIVER_OUTPUT_CTRL, GDOControl, sizeof(GDOControl)/sizeof(GDOControl[0]));
write_reg_data(g, BOOSTER_SOFT_START_CTRL, softstart, sizeof(softstart)/sizeof(softstart[0]));
write_reg(g, WRITE_VCOM_REG, 0xA8); // VCOM 7c
write_reg(g, SET_DUMMY_LINE_PERIOD, 0x1A); // 4 dummy lines per gate
write_reg(g, SET_GATE_LINE_WIDTH, 0x08); // 2us per line -> Lower this value for faster screen refresh
write_reg(g, DATA_ENTRY_MODE_SETTING, 0x03); // Ram data entry mode -> X and Y increase
write_reg_data(g, WRITE_LUT_REG, LUTDefault_full, sizeof(LUTDefault_full)/sizeof(LUTDefault_full[0])); // Initialize the LUT full
write_reg(g, DISPLAY_UPDATE_CTRL2, 0xC0); // Power ON the display
write_cmd(g, MASTER_ACTIVATION);
write_reg(g, DEEP_SLEEP_MODE, 0x00);
gU8 zeros[2] = { 0, 0 };
write_reg(g, SET_RAM_X_CNT, 0x00); // Set cursor at origin
write_reg_data(g, SET_RAM_Y_CNT, zeros, 2);
gU8 dataX[2] = { 0, (GDISP_SCREEN_WIDTH-1)/8 };
gU8 dataY[4] = { 0, 0, (GDISP_SCREEN_HEIGHT-1)%256, (GDISP_SCREEN_HEIGHT-1)/256 };
write_reg_data(g, SET_RAM_X_ADR, dataX, 2); // Set viewport for the whole screen
write_reg_data(g, SET_RAM_Y_ADR, dataY, 4);
release_bus(g);
gfxSleepMilliseconds(1500); // Wait for the display to initialize
/* Finish board initialization. */
post_init_board(g);
/* Initialise the GDISP structure */
g->g.Width = GDISP_SCREEN_WIDTH;
g->g.Height = GDISP_SCREEN_HEIGHT;
g->g.Orientation = gOrientation0;
g->g.Powermode = gPowerOn;
return gTrue;
}
#if 0 // Not needed yet
static void set_cursor(GDisplay *g) {
gU8 dataY[2];
dataY[0] = g->p.y % 256; // Y-data is send in two bytes
dataY[1] = g->p.y / 256;
switch(g->g.Orientation) {
default:
case gOrientation0:
case gOrientation180:
write_reg(g, SET_RAM_X_CNT, g->p.x / WS29EPD_PPB);
write_reg_data(g, SET_RAM_Y_CNT, dataY, 2);
break;
case gOrientation90:
case gOrientation270:
write_reg(g, SET_RAM_Y_CNT, g->p.x / WS29EPD_PPB);
write_reg_data(g, SET_RAM_X_CNT, dataY, 2);
break;
}
}
static void set_viewport(GDisplay *g) {
gU8 dataX[2];
gU8 dataY[4];
// Fill up the X and Y position buffers.
dataX[0] = g->p.x / WS29EPD_PPB;
dataX[1] = (g->p.x + g->p.cx - 1) / WS29EPD_PPB;
dataY[0] = g->p.y % 256; // Y-data is 9-bits so send in two bytes
dataY[1] = g->p.y / 256;
dataY[2] = (g->p.y + g->p.cy - 1) % 256;
dataY[3] = (g->p.y + g->p.cy - 1) / 256;
switch(g->g.Orientation) {
default:
case gOrientation0:
case gOrientation180:
write_reg_data(g, SET_RAM_X_ADR, dataX, 2);
write_reg_data(g, SET_RAM_Y_ADR, dataY, 4);
break;
case gOrientation90:
case gOrientation270:
write_reg_data(g, SET_RAM_X_ADR, dataY, 4);
write_reg_data(g, SET_RAM_Y_ADR, dataX, 2);
break;
}
}
#endif
#if GDISP_HARDWARE_DRAWPIXEL
LLDSPEC void gdisp_lld_draw_pixel(GDisplay *g) {
gCoord x, y;
switch(g->g.Orientation) {
default:
case gOrientation0:
x = g->p.x;
y = g->p.y;
break;
case gOrientation90:
x = g->p.y;
y = GDISP_SCREEN_HEIGHT-1 - g->p.x;
break;
case gOrientation180:
x = GDISP_SCREEN_WIDTH-1 - g->p.x;
y = GDISP_SCREEN_HEIGHT-1 - g->p.y;
break;
case gOrientation270:
x = GDISP_SCREEN_HEIGHT-1 - g->p.y;
y = g->p.x;
break;
}
/* There is only black and no black (white). */
if (gdispColor2Native(g->p.color) != Black) // Indexing in the array is done as described in the init routine
((gU8 *)g->priv)[(GDISP_SCREEN_HEIGHT*(x/WS29EPD_PPB)) + y] |= (1 << (WS29EPD_PPB-1 - (x % WS29EPD_PPB)));
else
((gU8 *)g->priv)[(GDISP_SCREEN_HEIGHT*(x/WS29EPD_PPB)) + y] &= ~(1 << (WS29EPD_PPB-1 - (x % WS29EPD_PPB)));
}
#endif
#if GDISP_HARDWARE_FLUSH
LLDSPEC void gdisp_lld_flush(GDisplay *g) {
acquire_bus(g);
/* Start writing frame buffer to ram. */
write_cmd(g, WRITE_RAM);
for(int i=0; i<GDISP_SCREEN_HEIGHT; i++)
for(int j=0; j<=((GDISP_SCREEN_WIDTH-1)/8); j++)
write_data(g, ((gU8 *)g->priv)[(GDISP_SCREEN_HEIGHT*j) + i]);
/* Update the screen. */
write_reg(g, DISPLAY_UPDATE_CTRL2, 0xc7); // Full update (partial hasn't been implemented yet)
write_cmd(g, MASTER_ACTIVATION);
write_cmd(g, NOP);
release_bus(g);
}
#endif
#if GDISP_NEED_CONTROL && GDISP_HARDWARE_CONTROL
LLDSPEC void gdisp_lld_control(GDisplay *g) {
switch(g->p.x) {
case GDISP_CONTROL_POWER:
if (g->g.Powermode == (gPowermode)g->p.ptr)
return;
switch((gPowermode)g->p.ptr) {
case gPowerOff:
case gPowerSleep:
case gPowerDeepSleep:
acquire_bus(g); // Put de display in deep sleep
write_reg(g, DISPLAY_UPDATE_CTRL2, 0x03);
write_reg(g, DEEP_SLEEP_MODE, 0x01);
release_bus(g);
break;
case gPowerOn:
acquire_bus(g); // Awake the display again
write_reg(g, DISPLAY_UPDATE_CTRL2, 0xC0);
write_reg(g, DEEP_SLEEP_MODE, 0x00);
release_bus(g);
break;
default:
return;
}
g->g.Powermode = (gPowermode)g->p.ptr;
return;
case GDISP_CONTROL_ORIENTATION:
if (g->g.Orientation == (gOrientation)g->p.ptr)
return;
switch((gOrientation)g->p.ptr) {
case gOrientation0:
g->g.Height = GDISP_SCREEN_HEIGHT;
g->g.Width = GDISP_SCREEN_WIDTH;
break;
case gOrientation90:
g->g.Height = GDISP_SCREEN_WIDTH;
g->g.Width = GDISP_SCREEN_HEIGHT;
break;
case gOrientation180:
g->g.Height = GDISP_SCREEN_HEIGHT;
g->g.Width = GDISP_SCREEN_WIDTH;
break;
case gOrientation270:
g->g.Height = GDISP_SCREEN_WIDTH;
g->g.Width = GDISP_SCREEN_HEIGHT;
break;
default:
return;
}
g->g.Orientation = (gOrientation)g->p.ptr;
return;
default:
return;
}
}
#endif
#endif // GFX_USE_GDISP
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