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opensteno_qmk/drivers/ugfx/gdisp/st7565/gdisp_lld_ST7565.c
Ryan 3afe0ea9b9
ST7565 tidyup (#10907)
2020-11-26 23:44:17 +11:00

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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 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
# 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, 4, 5, 6, 7
# endif
/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
// Some common routines and macros
# define RAM(g) ((gU8 *)g->priv)
# 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(GDISP_SCREEN_HEIGHT * GDISP_SCREEN_WIDTH / 8);
if (!g->priv) {
return gFalse;
}
// Initialise the board interface
init_board(g);
// Hardware reset
setpin_reset(g, TRUE);
gfxSleepMilliseconds(20);
setpin_reset(g, FALSE);
gfxSleepMilliseconds(20);
acquire_bus(g);
write_cmd(g, ST7565_LCD_BIAS);
write_cmd(g, ST7565_ADC);
write_cmd(g, ST7565_COM_SCAN);
write_cmd(g, ST7565_START_LINE | 0);
write_cmd2(g, ST7565_CONTRAST, GDISP_INITIAL_CONTRAST * 64 / 101);
write_cmd(g, ST7565_RESISTOR_RATIO | 0x1);
// turn on voltage converter (VC=1, VR=0, VF=0)
write_cmd(g, ST7565_POWER_CONTROL | 0x04);
delay_ms(50);
// turn on voltage regulator (VC=1, VR=1, VF=0)
write_cmd(g, ST7565_POWER_CONTROL | 0x06);
delay_ms(50);
// turn on voltage follower (VC=1, VR=1, VF=1)
write_cmd(g, ST7565_POWER_CONTROL | 0x07);
delay_ms(50);
write_cmd(g, ST7565_DISPLAY_ON);
write_cmd(g, ST7565_ALLON_NORMAL);
write_cmd(g, ST7565_INVERT_DISPLAY); // Disable Inversion of display.
write_cmd(g, ST7565_RMW);
// 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);
gU8 pagemap[] = {ST7565_PAGE_ORDER};
for (p = 0; p < sizeof(pagemap); p++) {
write_cmd(g, ST7565_PAGE | pagemap[p]);
write_cmd(g, ST7565_COLUMN_MSB | 0);
write_cmd(g, ST7565_COLUMN_LSB | 0);
write_cmd(g, ST7565_RMW);
write_data(g, RAM(g) + (p * GDISP_SCREEN_WIDTH), GDISP_SCREEN_WIDTH);
}
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
# if GDISP_HARDWARE_BITFILLS
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;
}
# 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 == (powermode_t)g->p.ptr) return;
switch ((powermode_t)g->p.ptr) {
case powerOff:
case powerSleep:
case powerDeepSleep:
acquire_bus(g);
write_cmd(g, ST7565_DISPLAY_OFF);
release_bus(g);
break;
case powerOn:
acquire_bus(g);
write_cmd(g, ST7565_DISPLAY_ON);
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:
if ((unsigned)g->p.ptr > 100) g->p.ptr = (void *)100;
acquire_bus(g);
write_cmd2(g, ST7565_CONTRAST, ((((unsigned)g->p.ptr) << 6) / 101) & 0x3F);
release_bus(g);
g->g.Contrast = (unsigned)g->p.ptr;
return;
}
}
# endif // GDISP_NEED_CONTROL
#endif // GFX_USE_GDISP
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