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Merge pull request #505 from MStohn/much-faster-glcd-st7920

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faster GLCD (ST7920 SW-SPI) implementation / fixes
This commit is contained in:
ErikZalm 2013-06-05 08:40:59 -07:00
commit 1520de0093
2 changed files with 135 additions and 5 deletions
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9
Marlin/dogm_lcd_implementation.h
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@ -33,11 +33,11 @@
#define LCD_CLICKED (buttons&EN_C)
#endif
// CHANGE_DE begin ***
#include <U8glib.h> // DE_U8glib
#include <U8glib.h>
#include "DOGMbitmaps.h"
#include "dogm_font_data_marlin.h"
#include "ultralcd.h"
#include "ultralcd_st7920_u8glib_rrd.h"
/* Russian language not supported yet, needs custom font
@ -74,11 +74,10 @@
#define FONT_STATUSMENU u8g_font_6x9
// LCD selection
#ifdef U8GLIB_ST7920
// SPI Com: SCK = en = (D4), MOSI = rw = (RS), CS = di = (ENABLE)
U8GLIB_ST7920_128X64_1X u8g(LCD_PINS_D4, LCD_PINS_ENABLE, LCD_PINS_RS);
//U8GLIB_ST7920_128X64_RRD u8g(0,0,0);
U8GLIB_ST7920_128X64_RRD u8g(0);
#else
U8GLIB_DOGM128 u8g(DOGLCD_CS, DOGLCD_A0); // HW-SPI Com: CS, A0
#endif

131
Marlin/ultralcd_st7920_u8glib_rrd.h Normal file
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@ -0,0 +1,131 @@
#ifndef ULCDST7920_H
#define ULCDST7920_H
#include "Marlin.h"
#ifdef U8GLIB_ST7920
//set optimization so ARDUINO optimizes this file
#pragma GCC optimize (3)
#define ST7920_CLK_PIN LCD_PINS_D4
#define ST7920_DAT_PIN LCD_PINS_ENABLE
#define ST7920_CS_PIN LCD_PINS_RS
//#define PAGE_HEIGHT 8 //128 byte frambuffer
//#define PAGE_HEIGHT 16 //256 byte frambuffer
#define PAGE_HEIGHT 32 //512 byte framebuffer
#define WIDTH 128
#define HEIGHT 64
#include <U8glib.h>
static void ST7920_SWSPI_SND_8BIT(uint8_t val)
{
uint8_t i;
for( i=0; i<8; i++ )
{
WRITE(ST7920_CLK_PIN,0);
WRITE(ST7920_DAT_PIN,val&0x80);
val<<=1;
WRITE(ST7920_CLK_PIN,1);
}
}
#define ST7920_CS() {WRITE(ST7920_CS_PIN,1);u8g_10MicroDelay();}
#define ST7920_NCS() {WRITE(ST7920_CS_PIN,0);}
#define ST7920_SET_CMD() {ST7920_SWSPI_SND_8BIT(0xf8);u8g_10MicroDelay();}
#define ST7920_SET_DAT() {ST7920_SWSPI_SND_8BIT(0xfa);u8g_10MicroDelay();}
#define ST7920_WRITE_BYTE(a) {ST7920_SWSPI_SND_8BIT((a)&0xf0);ST7920_SWSPI_SND_8BIT((a)<<4);u8g_10MicroDelay();}
#define ST7920_WRITE_BYTES(p,l) {uint8_t i;for(i=0;i<l;i++){ST7920_SWSPI_SND_8BIT(*p&0xf0);ST7920_SWSPI_SND_8BIT(*p<<4);p++;}u8g_10MicroDelay();}
uint8_t u8g_dev_rrd_st7920_128x64_fn(u8g_t *u8g, u8g_dev_t *dev, uint8_t msg, void *arg)
{
uint8_t i,y;
switch(msg)
{
case U8G_DEV_MSG_INIT:
{
SET_OUTPUT(ST7920_CS_PIN);
WRITE(ST7920_CS_PIN,0);
SET_OUTPUT(ST7920_DAT_PIN);
WRITE(ST7920_DAT_PIN,0);
SET_OUTPUT(ST7920_CLK_PIN);
WRITE(ST7920_CLK_PIN,1);
ST7920_CS();
u8g_Delay(90); //initial delay for boot up
ST7920_SET_CMD();
ST7920_WRITE_BYTE(0x08); //display off, cursor+blink off
ST7920_WRITE_BYTE(0x01); //clear CGRAM ram
u8g_Delay(10); //delay for cgram clear
ST7920_WRITE_BYTE(0x3E); //extended mode + gdram active
for(y=0;y<HEIGHT/2;y++) //clear GDRAM
{
ST7920_WRITE_BYTE(0x80|y); //set y
ST7920_WRITE_BYTE(0x80); //set x = 0
ST7920_SET_DAT();
for(i=0;i<2*WIDTH/8;i++) //2x width clears both segments
ST7920_WRITE_BYTE(0);
ST7920_SET_CMD();
}
ST7920_WRITE_BYTE(0x0C); //display on, cursor+blink off
ST7920_NCS();
}
break;
case U8G_DEV_MSG_STOP:
break;
case U8G_DEV_MSG_PAGE_NEXT:
{
uint8_t *ptr;
u8g_pb_t *pb = (u8g_pb_t *)(dev->dev_mem);
y = pb->p.page_y0;
ptr = (uint8_t*)pb->buf;
ST7920_CS();
for( i = 0; i < PAGE_HEIGHT; i ++ )
{
ST7920_SET_CMD();
if ( y < 32 )
{
ST7920_WRITE_BYTE(0x80 | y); //y
ST7920_WRITE_BYTE(0x80); //x=0
}
else
{
ST7920_WRITE_BYTE(0x80 | (y-32)); //y
ST7920_WRITE_BYTE(0x80 | 8); //x=64
}
ST7920_SET_DAT();
ST7920_WRITE_BYTES(ptr,WIDTH/8); //ptr is incremented inside of macro
y++;
}
ST7920_NCS();
}
break;
}
#if PAGE_HEIGHT == 8
return u8g_dev_pb8h1_base_fn(u8g, dev, msg, arg);
#elif PAGE_HEIGHT == 16
return u8g_dev_pb16h1_base_fn(u8g, dev, msg, arg);
#else
return u8g_dev_pb32h1_base_fn(u8g, dev, msg, arg);
#endif
}
uint8_t u8g_dev_st7920_128x64_rrd_buf[WIDTH*(PAGE_HEIGHT/8)] U8G_NOCOMMON;
u8g_pb_t u8g_dev_st7920_128x64_rrd_pb = {{PAGE_HEIGHT,HEIGHT,0,0,0},WIDTH,u8g_dev_st7920_128x64_rrd_buf};
u8g_dev_t u8g_dev_st7920_128x64_rrd_sw_spi = {u8g_dev_rrd_st7920_128x64_fn,&u8g_dev_st7920_128x64_rrd_pb,&u8g_com_null_fn};
class U8GLIB_ST7920_128X64_RRD : public U8GLIB
{
public:
U8GLIB_ST7920_128X64_RRD(uint8_t dummy) : U8GLIB(&u8g_dev_st7920_128x64_rrd_sw_spi) {}
};
#endif //U8GLIB_ST7920
#endif //ULCDST7920_H