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
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# define GDISP_DRIVER_VMT GDISPVMT_ST7565_QMK
# include "gdisp_lld_config.h"
# include "src/gdisp/gdisp_driver.h"
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# include "board_st7565.h"
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/*===========================================================================*/
/* Driver local definitions. */
/*===========================================================================*/
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# ifndef GDISP_SCREEN_HEIGHT
# define GDISP_SCREEN_HEIGHT LCD_HEIGHT
# endif
# ifndef GDISP_SCREEN_WIDTH
# define GDISP_SCREEN_WIDTH LCD_WIDTH
# endif
# ifndef GDISP_INITIAL_CONTRAST
# define GDISP_INITIAL_CONTRAST 35
# endif
# ifndef GDISP_INITIAL_BACKLIGHT
# define GDISP_INITIAL_BACKLIGHT 100
# endif
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# define GDISP_FLG_NEEDFLUSH (GDISP_FLG_DRIVER << 0)
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# include "st7565.h"
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/*===========================================================================*/
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/* Driver config defaults for backward compatibility. */
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/*===========================================================================*/
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# 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
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/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
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typedef struct {
bool_t buffer2;
uint8_t data_pos;
uint8_t data[16];
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uint8_t ram[GDISP_SCREEN_HEIGHT * GDISP_SCREEN_WIDTH / 8];
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} PrivData;
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// Some common routines and macros
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# define PRIV(g) ((PrivData *)g->priv)
# define RAM(g) (PRIV(g)->ram)
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static GFXINLINE void write_cmd(GDisplay *g, uint8_t cmd) { PRIV(g)->data[PRIV(g)->data_pos++] = cmd; }
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static GFXINLINE void flush_cmd(GDisplay *g) {
write_data(g, PRIV(g)->data, PRIV(g)->data_pos);
PRIV(g)->data_pos = 0;
}
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# 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); \
}
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// Some common routines and macros
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# define delay(us) gfxSleepMicroseconds(us)
# define delay_ms(ms) gfxSleepMilliseconds(ms)
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# define xyaddr(x, y) ((x) + ((y) >> 3) * GDISP_SCREEN_WIDTH)
# define xybit(y) (1 << ((y)&7))
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/*===========================================================================*/
/* 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.
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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);
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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);
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// turn on internal power supply (VC=1, VR=1, VF=1)
write_cmd(g, ST7565_POWER_CONTROL | 0x07);
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write_cmd(g, ST7565_INVERT_DISPLAY);
write_cmd(g, ST7565_ALLON_NORMAL);
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write_cmd(g, ST7565_START_LINE | 0);
write_cmd(g, ST7565_RMW);
flush_cmd(g);
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// Finish Init
post_init_board(g);
// Release the bus
release_bus(g);
/* Initialise the GDISP structure */
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g->g.Width = GDISP_SCREEN_WIDTH;
g->g.Height = GDISP_SCREEN_HEIGHT;
g->g.Orientation = GDISP_ROTATE_0;
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g->g.Powermode = powerOff;
g->g.Backlight = GDISP_INITIAL_BACKLIGHT;
g->g.Contrast = GDISP_INITIAL_CONTRAST;
return TRUE;
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}
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# if GDISP_HARDWARE_FLUSH
LLDSPEC void gdisp_lld_flush(GDisplay *g) {
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unsigned p;
// Don't flush if we don't need it.
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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);
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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;
}
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# endif
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# if GDISP_HARDWARE_DRAWPIXEL
LLDSPEC void gdisp_lld_draw_pixel(GDisplay *g) {
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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;
}
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# endif
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# if GDISP_HARDWARE_PIXELREAD
LLDSPEC color_t gdisp_lld_get_pixel_color(GDisplay *g) {
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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;
}
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# endif
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LLDSPEC void gdisp_lld_blit_area(GDisplay *g) {
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uint8_t *buffer = (uint8_t *)g->p.ptr;
int linelength = g->p.cx;
for (int i = 0; i < g->p.cy; i++) {
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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;
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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);
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} else {
*dst &= ~xybit(dsty);
}
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dstx++;
srcbit++;
}
}
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g->flags |= GDISP_FLG_NEEDFLUSH;
}
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# if GDISP_NEED_CONTROL && GDISP_HARDWARE_CONTROL
LLDSPEC void gdisp_lld_control(GDisplay *g) {
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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:
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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;
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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;
}
}
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# endif // GDISP_NEED_CONTROL
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#endif // GFX_USE_GDISP