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LCD initialization sequence according to the docs

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The LCD initialization show now be much better and faster with no
flickering at the startup.

Also fix the contrast control.
This commit is contained in:
Fred Sundvik 2017-04-07 10:55:29 +03:00
parent 3994fb1e79
commit 995002fa91
2 changed files with 13 additions and 29 deletions
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40
keyboards/ergodox/infinity/drivers/gdisp/st7565ergodox/gdisp_lld_ST7565.c
View file

@ -26,7 +26,7 @@
#define GDISP_SCREEN_WIDTH 128 #define GDISP_SCREEN_WIDTH 128
#endif #endif
#ifndef GDISP_INITIAL_CONTRAST #ifndef GDISP_INITIAL_CONTRAST
#define GDISP_INITIAL_CONTRAST 0 #define GDISP_INITIAL_CONTRAST 35
#endif #endif
#ifndef GDISP_INITIAL_BACKLIGHT #ifndef GDISP_INITIAL_BACKLIGHT
#define GDISP_INITIAL_BACKLIGHT 100 #define GDISP_INITIAL_BACKLIGHT 100
@ -111,41 +111,25 @@ LLDSPEC bool_t gdisp_lld_init(GDisplay *g) {
gfxSleepMilliseconds(20); gfxSleepMilliseconds(20);
setpin_reset(g, FALSE); setpin_reset(g, FALSE);
gfxSleepMilliseconds(20); gfxSleepMilliseconds(20);
acquire_bus(g); acquire_bus(g);
enter_cmd_mode(g); enter_cmd_mode(g);
write_cmd(g, ST7565_DISPLAY_OFF);
write_cmd(g, ST7565_RESET);
write_cmd(g, ST7565_LCD_BIAS); write_cmd(g, ST7565_LCD_BIAS);
write_cmd(g, ST7565_ADC); write_cmd(g, ST7565_ADC);
write_cmd(g, ST7565_COM_SCAN); write_cmd(g, ST7565_COM_SCAN);
write_cmd(g, ST7565_START_LINE | 0); write_cmd(g, ST7565_RESISTOR_RATIO | 0x1);
write_cmd2(g, ST7565_CONTRAST, GDISP_INITIAL_CONTRAST);
write_cmd(g, ST7565_RESISTOR_RATIO | 0x6); // turn on internal power supply (VC=1, VR=1, VF=1)
// turn on voltage converter (VC=1, VR=0, VF=0)
write_cmd(g, ST7565_POWER_CONTROL | 0x04);
flush_cmd(g);
delay_ms(50);
// turn on voltage regulator (VC=1, VR=1, VF=0)
write_cmd(g, ST7565_POWER_CONTROL | 0x06);
flush_cmd(g);
delay_ms(50);
// turn on voltage follower (VC=1, VR=1, VF=1)
write_cmd(g, ST7565_POWER_CONTROL | 0x07); write_cmd(g, ST7565_POWER_CONTROL | 0x07);
flush_cmd(g);
delay_ms(50);
write_cmd(g, 0xE2);
write_cmd(g, ST7565_COM_SCAN);
write_cmd2(g, ST7565_CONTRAST, GDISP_INITIAL_CONTRAST*64/101);
//write_cmd2(g, ST7565_CONTRAST, 0);
write_cmd(g, ST7565_DISPLAY_ON);
write_cmd(g, ST7565_ALLON_NORMAL);
write_cmd(g, ST7565_INVERT_DISPLAY); write_cmd(g, ST7565_INVERT_DISPLAY);
write_cmd(g, ST7565_ALLON_NORMAL);
write_cmd(g, ST7565_DISPLAY_ON);
write_cmd(g, ST7565_START_LINE | 0);
write_cmd(g, ST7565_RMW); write_cmd(g, ST7565_RMW);
flush_cmd(g); flush_cmd(g);
@ -331,14 +315,12 @@ LLDSPEC void gdisp_lld_control(GDisplay *g) {
return; return;
case GDISP_CONTROL_CONTRAST: case GDISP_CONTROL_CONTRAST:
if ((unsigned)g->p.ptr > 100) g->g.Contrast = (unsigned)g->p.ptr & 63;
g->p.ptr = (void *)100;
acquire_bus(g); acquire_bus(g);
enter_cmd_mode(g); enter_cmd_mode(g);
write_cmd2(g, ST7565_CONTRAST, ((((unsigned)g->p.ptr)<<6)/101) & 0x3F); write_cmd2(g, ST7565_CONTRAST, g->g.Contrast);
flush_cmd(g); flush_cmd(g);
release_bus(g); release_bus(g);
g->g.Contrast = (unsigned)g->p.ptr;
return; return;
} }
} }

2
keyboards/ergodox/infinity/drivers/gdisp/st7565ergodox/st7565.h
View file

@ -34,4 +34,6 @@
#define ST7565_RESISTOR_RATIO 0x20 #define ST7565_RESISTOR_RATIO 0x20
#define ST7565_POWER_CONTROL 0x28 #define ST7565_POWER_CONTROL 0x28
#define ST7565_RESET 0xE2
#endif /* _ST7565_H */ #endif /* _ST7565_H */