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qmk_firmware/drivers/ugfx/gdisp/st7565/gdisp_lld_ST7565.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.org/license.html
*/
#include "gfx.h"
#if GFX_USE_GDISP
#define GDISP_DRIVER_VMT GDISPVMT_ST7565_QMK
#include "gdisp_lld_config.h"
#include "src/gdisp/gdisp_driver.h"
#include "board_ST7565.h"
/*===========================================================================*/
/* Driver local definitions. */
/*===========================================================================*/
#ifndef GDISP_SCREEN_HEIGHT
#define GDISP_SCREEN_HEIGHT 32
#endif
#ifndef GDISP_SCREEN_WIDTH
#define GDISP_SCREEN_WIDTH 128
#endif
#ifndef GDISP_INITIAL_CONTRAST
#define GDISP_INITIAL_CONTRAST 35
#endif
#ifndef GDISP_INITIAL_BACKLIGHT
#define GDISP_INITIAL_BACKLIGHT 100
#endif
#define GDISP_FLG_NEEDFLUSH (GDISP_FLG_DRIVER<<0)
#include "st7565.h"
/*===========================================================================*/
/* Driver config defaults for backward compatibility. */
/*===========================================================================*/
#ifndef ST7565_LCD_BIAS
#define ST7565_LCD_BIAS ST7565_LCD_BIAS_7
#endif
#ifndef ST7565_ADC
#define ST7565_ADC ST7565_ADC_NORMAL
#endif
#ifndef ST7565_COM_SCAN
#define ST7565_COM_SCAN ST7565_COM_SCAN_INC
#endif
#ifndef ST7565_PAGE_ORDER
#define ST7565_PAGE_ORDER 0,1,2,3
#endif
/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
typedef struct{
bool_t buffer2;
uint8_t data_pos;
uint8_t data[16];
uint8_t ram[GDISP_SCREEN_HEIGHT * GDISP_SCREEN_WIDTH / 8];
}PrivData;
// Some common routines and macros
#define PRIV(g) ((PrivData*)g->priv)
#define RAM(g) (PRIV(g)->ram)
static GFXINLINE void write_cmd(GDisplay* g, uint8_t cmd) {
PRIV(g)->data[PRIV(g)->data_pos++] = cmd;
}
static GFXINLINE void flush_cmd(GDisplay* g) {
write_data(g, PRIV(g)->data, PRIV(g)->data_pos);
PRIV(g)->data_pos = 0;
}
#define write_cmd2(g, cmd1, cmd2) { write_cmd(g, cmd1); write_cmd(g, cmd2); }
#define write_cmd3(g, cmd1, cmd2, cmd3) { write_cmd(g, cmd1); write_cmd(g, cmd2); write_cmd(g, cmd3); }
// Some common routines and macros
#define delay(us) gfxSleepMicroseconds(us)
#define delay_ms(ms) gfxSleepMilliseconds(ms)
#define xyaddr(x, y) ((x) + ((y)>>3)*GDISP_SCREEN_WIDTH)
#define xybit(y) (1<<((y)&7))
/*===========================================================================*/
/* Driver exported functions. */
/*===========================================================================*/
/*
* As this controller can't update on a pixel boundary we need to maintain the
* the entire display surface in memory so that we can do the necessary bit
* operations. Fortunately it is a small display in monochrome.
* 64 * 128 / 8 = 1024 bytes.
*/
LLDSPEC bool_t gdisp_lld_init(GDisplay *g) {
// The private area is the display surface.
g->priv = gfxAlloc(sizeof(PrivData));
PRIV(g)->buffer2 = false;
PRIV(g)->data_pos = 0;
// Initialise the board interface
init_board(g);
// Hardware reset
setpin_reset(g, TRUE);
gfxSleepMilliseconds(20);
setpin_reset(g, FALSE);
gfxSleepMilliseconds(20);
acquire_bus(g);
enter_cmd_mode(g);
write_cmd(g, ST7565_RESET);
write_cmd(g, ST7565_LCD_BIAS);
write_cmd(g, ST7565_ADC);
write_cmd(g, ST7565_COM_SCAN);
write_cmd(g, ST7565_RESISTOR_RATIO | 0x1);
write_cmd2(g, ST7565_CONTRAST, GDISP_INITIAL_CONTRAST);
// turn on internal power supply (VC=1, VR=1, VF=1)
write_cmd(g, ST7565_POWER_CONTROL | 0x07);
write_cmd(g, ST7565_INVERT_DISPLAY);
write_cmd(g, ST7565_ALLON_NORMAL);
write_cmd(g, ST7565_START_LINE | 0);
write_cmd(g, ST7565_RMW);
flush_cmd(g);
// Finish Init
post_init_board(g);
// Release the bus
release_bus(g);
/* Initialise the GDISP structure */
g->g.Width = GDISP_SCREEN_WIDTH;
g->g.Height = GDISP_SCREEN_HEIGHT;
g->g.Orientation = GDISP_ROTATE_0;
g->g.Powermode = powerOff;
g->g.Backlight = GDISP_INITIAL_BACKLIGHT;
g->g.Contrast = GDISP_INITIAL_CONTRAST;
return TRUE;
}
#if GDISP_HARDWARE_FLUSH
LLDSPEC void gdisp_lld_flush(GDisplay *g) {
unsigned p;
// Don't flush if we don't need it.
if (!(g->flags & GDISP_FLG_NEEDFLUSH))
return;
acquire_bus(g);
enter_cmd_mode(g);
unsigned dstOffset = (PRIV(g)->buffer2 ? 4 : 0);
for (p = 0; p < 4; p++) {
write_cmd(g, ST7565_PAGE | (p + dstOffset));
write_cmd(g, ST7565_COLUMN_MSB | 0);
write_cmd(g, ST7565_COLUMN_LSB | 0);
write_cmd(g, ST7565_RMW);
flush_cmd(g);
enter_data_mode(g);
write_data(g, RAM(g) + (p*GDISP_SCREEN_WIDTH), GDISP_SCREEN_WIDTH);
enter_cmd_mode(g);
}
unsigned line = (PRIV(g)->buffer2 ? 32 : 0);
write_cmd(g, ST7565_START_LINE | line);
flush_cmd(g);
PRIV(g)->buffer2 = !PRIV(g)->buffer2;
release_bus(g);
g->flags &= ~GDISP_FLG_NEEDFLUSH;
}
#endif
#if GDISP_HARDWARE_DRAWPIXEL
LLDSPEC void gdisp_lld_draw_pixel(GDisplay *g) {
coord_t x, y;
switch(g->g.Orientation) {
default:
case GDISP_ROTATE_0:
x = g->p.x;
y = g->p.y;
break;
case GDISP_ROTATE_90:
x = g->p.y;
y = GDISP_SCREEN_HEIGHT-1 - g->p.x;
break;
case GDISP_ROTATE_180:
x = GDISP_SCREEN_WIDTH-1 - g->p.x;
y = GDISP_SCREEN_HEIGHT-1 - g->p.y;
break;
case GDISP_ROTATE_270:
x = GDISP_SCREEN_HEIGHT-1 - g->p.y;
y = g->p.x;
break;
}
if (gdispColor2Native(g->p.color) != Black)
RAM(g)[xyaddr(x, y)] |= xybit(y);
else
RAM(g)[xyaddr(x, y)] &= ~xybit(y);
g->flags |= GDISP_FLG_NEEDFLUSH;
}
#endif
#if GDISP_HARDWARE_PIXELREAD
LLDSPEC color_t gdisp_lld_get_pixel_color(GDisplay *g) {
coord_t x, y;
switch(g->g.Orientation) {
default:
case GDISP_ROTATE_0:
x = g->p.x;
y = g->p.y;
break;
case GDISP_ROTATE_90:
x = g->p.y;
y = GDISP_SCREEN_HEIGHT-1 - g->p.x;
break;
case GDISP_ROTATE_180:
x = GDISP_SCREEN_WIDTH-1 - g->p.x;
y = GDISP_SCREEN_HEIGHT-1 - g->p.y;
break;
case GDISP_ROTATE_270:
x = GDISP_SCREEN_HEIGHT-1 - g->p.y;
y = g->p.x;
break;
}
return (RAM(g)[xyaddr(x, y)] & xybit(y)) ? White : Black;
}
#endif
LLDSPEC void gdisp_lld_blit_area(GDisplay *g) {
uint8_t* buffer = (uint8_t*)g->p.ptr;
int linelength = g->p.cx;
for (int i = 0; i < g->p.cy; i++) {
unsigned dstx = g->p.x;
unsigned dsty = g->p.y + i;
unsigned srcx = g->p.x1;
unsigned srcy = g->p.y1 + i;
unsigned srcbit = srcy * g->p.x2 + srcx;
for(int j=0; j < linelength; j++) {
uint8_t src = buffer[srcbit / 8];
uint8_t bit = 7-(srcbit % 8);
uint8_t bitset = (src >> bit) & 1;
uint8_t* dst = &(RAM(g)[xyaddr(dstx, dsty)]);
if (bitset) {
*dst |= xybit(dsty);
}
else {
*dst &= ~xybit(dsty);
}
dstx++;
srcbit++;
}
}
g->flags |= GDISP_FLG_NEEDFLUSH;
}
#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 == (powermode_t)g->p.ptr)
return;
switch((powermode_t)g->p.ptr) {
case powerOff:
case powerSleep:
case powerDeepSleep:
acquire_bus(g);
enter_cmd_mode(g);
write_cmd(g, ST7565_DISPLAY_OFF);
flush_cmd(g);
release_bus(g);
break;
case powerOn:
acquire_bus(g);
enter_cmd_mode(g);
write_cmd(g, ST7565_DISPLAY_ON);
flush_cmd(g);
release_bus(g);
break;
default:
return;
}
g->g.Powermode = (powermode_t)g->p.ptr;
return;
case GDISP_CONTROL_ORIENTATION:
if (g->g.Orientation == (orientation_t)g->p.ptr)
return;
switch((orientation_t)g->p.ptr) {
/* Rotation is handled by the drawing routines */
case GDISP_ROTATE_0:
case GDISP_ROTATE_180:
g->g.Height = GDISP_SCREEN_HEIGHT;
g->g.Width = GDISP_SCREEN_WIDTH;
break;
case GDISP_ROTATE_90:
case GDISP_ROTATE_270:
g->g.Height = GDISP_SCREEN_WIDTH;
g->g.Width = GDISP_SCREEN_HEIGHT;
break;
default:
return;
}
g->g.Orientation = (orientation_t)g->p.ptr;
return;
case GDISP_CONTROL_CONTRAST:
g->g.Contrast = (unsigned)g->p.ptr & 63;
acquire_bus(g);
enter_cmd_mode(g);
write_cmd2(g, ST7565_CONTRAST, g->g.Contrast);
flush_cmd(g);
release_bus(g);
return;
}
}
#endif // GDISP_NEED_CONTROL
#endif // GFX_USE_GDISP
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