You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
135 lines
3.9 KiB
C++
135 lines
3.9 KiB
C++
#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 framebuffer
|
|
//#define PAGE_HEIGHT 16 //256 byte framebuffer
|
|
#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);
|
|
#if F_CPU == 20000000
|
|
__asm__("nop\n\t");
|
|
#endif
|
|
WRITE(ST7920_DAT_PIN,val&0x80);
|
|
val<<=1;
|
|
WRITE(ST7920_CLK_PIN,1);
|
|
#if F_CPU == 20000000
|
|
__asm__("nop\n\t""nop\n\t");
|
|
#endif
|
|
}
|
|
}
|
|
|
|
#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((uint8_t)((a)&0xf0u));ST7920_SWSPI_SND_8BIT((uint8_t)((a)<<4u));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:
|
|
{
|
|
OUT_WRITE(ST7920_CS_PIN,LOW);
|
|
OUT_WRITE(ST7920_DAT_PIN,LOW);
|
|
OUT_WRITE(ST7920_CLK_PIN,HIGH);
|
|
|
|
ST7920_CS();
|
|
u8g_Delay(120); //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(15); //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
|