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This commit is contained in:
Bob-the-Kuhn 2018-02-13 21:59:18 -06:00
parent d741bcf8a9
commit 9a423e9a89
1 changed files with 35 additions and 32 deletions
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67
Marlin/src/lcd/dogm/ultralcd_st7920_u8glib_rrd_AVR.cpp
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@ -24,6 +24,7 @@
// file u8g_dev_st7920_128x64_HAL.cpp for the HAL version.
#include "../../inc/MarlinConfig.h"
#include <U8glib.h>
#if ENABLED(U8GLIB_ST7920)
@ -40,8 +41,6 @@
#define LCD_PIXEL_WIDTH 128
#define LCD_PIXEL_HEIGHT 64
#include <U8glib.h>
//set optimization so ARDUINO optimizes this file
#pragma GCC optimize (3)
@ -84,29 +83,35 @@
#define ST7920_DELAY_3 CPU_ST7920_DELAY_3
#endif
#define ST7920_SND_BIT \
WRITE(ST7920_CLK_PIN, LOW); ST7920_DELAY_1; \
WRITE(ST7920_DAT_PIN, val & 0x80); ST7920_DELAY_2; \
WRITE(ST7920_CLK_PIN, HIGH); ST7920_DELAY_3; \
val <<= 1
static void ST7920_SWSPI_SND_8BIT(uint8_t val) {
ST7920_SND_BIT; // 1
ST7920_SND_BIT; // 2
ST7920_SND_BIT; // 3
ST7920_SND_BIT; // 4
ST7920_SND_BIT; // 5
ST7920_SND_BIT; // 6
ST7920_SND_BIT; // 7
ST7920_SND_BIT; // 8
}
#if defined(DOGM_SPI_DELAY_US) && DOGM_SPI_DELAY_US > 0
#define U8G_DELAY() delayMicroseconds(DOGM_SPI_DELAY_US)
#else
#define U8G_DELAY() u8g_10MicroDelay()
#endif
static void ST7920_WRITE_BYTE(uint8_t val) {
for (uint8_t i = 0; i < 8; i++) {
WRITE(ST7920_DAT_PIN, val & 0x80);
WRITE(ST7920_CLK_PIN, HIGH);
WRITE(ST7920_CLK_PIN, LOW);
val <<= 1;
}
}
#define ST7920_SET_CMD() { ST7920_WRITE_BYTE(0xF8); U8G_DELAY(); }
#define ST7920_SET_DAT() { ST7920_WRITE_BYTE(0xFA); U8G_DELAY(); }
#define ST7920_WRITE_NIBBLES(a) { ST7920_WRITE_BYTE((uint8_t)((a)&0xF0u)); ST7920_WRITE_BYTE((uint8_t)((a)<<4u)); U8G_DELAY(); }
#define ST7920_WRITE_NIBBLES_P(p,l) { for (uint8_t i = l + 1; --i;) { ST7920_WRITE_BYTE(*p&0xF0); ST7920_WRITE_BYTE(*p<<4); p++; } U8G_DELAY(); }
#define ST7920_CS() { WRITE(ST7920_CS_PIN,1); U8G_DELAY(); }
#define ST7920_NCS() { WRITE(ST7920_CS_PIN,0); }
#define ST7920_SET_CMD() { ST7920_SWSPI_SND_8BIT(0xF8); U8G_DELAY(); }
#define ST7920_SET_DAT() { ST7920_SWSPI_SND_8BIT(0xFA); U8G_DELAY(); }
#define ST7920_WRITE_BYTE(a) { ST7920_SWSPI_SND_8BIT((uint8_t)((a)&0xF0u)); ST7920_SWSPI_SND_8BIT((uint8_t)((a)<<4u)); U8G_DELAY(); }
#define ST7920_WRITE_BYTES(p,l) { for (uint8_t i = l + 1; --i;) { ST7920_SWSPI_SND_8BIT(*p&0xF0); ST7920_SWSPI_SND_8BIT(*p<<4); p++; } U8G_DELAY(); }
uint8_t u8g_dev_rrd_st7920_128x64_fn(u8g_t *u8g, u8g_dev_t *dev, uint8_t msg, void *arg) {
uint8_t i, y;
@ -114,26 +119,24 @@ uint8_t u8g_dev_rrd_st7920_128x64_fn(u8g_t *u8g, u8g_dev_t *dev, uint8_t msg, vo
case U8G_DEV_MSG_INIT: {
OUT_WRITE(ST7920_CS_PIN, LOW);
OUT_WRITE(ST7920_DAT_PIN, LOW);
OUT_WRITE(ST7920_CLK_PIN, LOW);
OUT_WRITE(ST7920_CLK_PIN, HIGH);
ST7920_CS();
u8g_Delay(120); //initial delay for boot up
ST7920_SET_CMD();
ST7920_WRITE_NIBBLES(0x08); //display off, cursor+blink off
ST7920_WRITE_NIBBLES(0x01); //clear CGRAM ram
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_NIBBLES(0x3E); //extended mode + GDRAM active
ST7920_WRITE_BYTE(0x3E); //extended mode + GDRAM active
for (y = 0; y < (LCD_PIXEL_HEIGHT) / 2; y++) { //clear GDRAM
ST7920_WRITE_NIBBLES(0x80 | y); //set y
ST7920_WRITE_NIBBLES(0x80); //set x = 0
ST7920_WRITE_BYTE(0x80 | y); //set y
ST7920_WRITE_BYTE(0x80); //set x = 0
ST7920_SET_DAT();
for (i = 0; i < 2 * (LCD_PIXEL_WIDTH) / 8; i++) //2x width clears both segments
ST7920_WRITE_NIBBLES(0);
ST7920_WRITE_BYTE(0);
ST7920_SET_CMD();
}
ST7920_WRITE_NIBBLES(0x0C); //display on, cursor+blink off
ST7920_WRITE_BYTE(0x0C); //display on, cursor+blink off
ST7920_NCS();
}
break;
@ -150,15 +153,15 @@ uint8_t u8g_dev_rrd_st7920_128x64_fn(u8g_t *u8g, u8g_dev_t *dev, uint8_t msg, vo
for (i = 0; i < PAGE_HEIGHT; i ++) {
ST7920_SET_CMD();
if (y < 32) {
ST7920_WRITE_NIBBLES(0x80 | y); //y
ST7920_WRITE_NIBBLES(0x80); //x=0
ST7920_WRITE_BYTE(0x80 | y); //y
ST7920_WRITE_BYTE(0x80); //x=0
}
else {
ST7920_WRITE_NIBBLES(0x80 | (y - 32)); //y
ST7920_WRITE_NIBBLES(0x80 | 8); //x=64
ST7920_WRITE_BYTE(0x80 | (y - 32)); //y
ST7920_WRITE_BYTE(0x80 | 8); //x=64
}
ST7920_SET_DAT();
ST7920_WRITE_NIBBLES_P(ptr, (LCD_PIXEL_WIDTH) / 8); //ptr is incremented inside of macro
ST7920_WRITE_BYTES(ptr, (LCD_PIXEL_WIDTH) / 8); //ptr is incremented inside of macro
y++;
}
ST7920_NCS();