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Merge pull request #4148 from thinkyhead/3drag_delay_anhardt

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Fix up delays in ST7920_SWSPI_SND_8BIT
This commit is contained in:
Scott Lahteine 2016-06-25 19:16:37 -07:00 committed by GitHub
commit 815000ff32
1 changed files with 64 additions and 16 deletions
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80
Marlin/ultralcd_st7920_u8glib_rrd.h
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@ -27,9 +27,6 @@
#if ENABLED(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
@ -43,20 +40,70 @@
#include <U8glib.h>
//set optimization so ARDUINO optimizes this file
#pragma GCC optimize (3)
#define DELAY_0_NOP NOOP
#define DELAY_1_NOP __asm__("nop\n\t")
#define DELAY_2_NOP __asm__("nop\n\t" "nop\n\t")
#define DELAY_3_NOP __asm__("nop\n\t" "nop\n\t" "nop\n\t")
#define DELAY_4_NOP __asm__("nop\n\t" "nop\n\t" "nop\n\t" "nop\n\t")
// If you want you can define your own set of delays in Configuration.h
//#define ST7920_DELAY_1 DELAY_0_NOP
//#define ST7920_DELAY_2 DELAY_0_NOP
//#define ST7920_DELAY_3 DELAY_0_NOP
#if F_CPU >= 20000000
#define CPU_ST7920_DELAY_1 DELAY_0_NOP
#define CPU_ST7920_DELAY_2 DELAY_0_NOP
#define CPU_ST7920_DELAY_3 DELAY_1_NOP
#elif (MOTHERBOARD == BOARD_3DRAG) || (MOTHERBOARD == BOARD_K8200)
#define CPU_ST7920_DELAY_1 DELAY_0_NOP
#define CPU_ST7920_DELAY_2 DELAY_3_NOP
#define CPU_ST7920_DELAY_3 DELAY_0_NOP
#elif (MOTHERBOARD == BOARD_MINIRAMBO)
#define CPU_ST7920_DELAY_1 DELAY_0_NOP
#define CPU_ST7920_DELAY_2 DELAY_4_NOP
#define CPU_ST7920_DELAY_3 DELAY_0_NOP
#elif (MOTHERBOARD == BOARD_RAMBO)
#define CPU_ST7920_DELAY_1 DELAY_0_NOP
#define CPU_ST7920_DELAY_2 DELAY_0_NOP
#define CPU_ST7920_DELAY_3 DELAY_0_NOP
#elif F_CPU == 16000000
#define CPU_ST7920_DELAY_1 DELAY_0_NOP
#define CPU_ST7920_DELAY_2 DELAY_0_NOP
#define CPU_ST7920_DELAY_3 DELAY_1_NOP
#else
#error "No valid condition for delays in 'ultralcd_st7920_u8glib_rrd.h'"
#endif
#ifndef ST7920_DELAY_1
#define ST7920_DELAY_1 CPU_ST7920_DELAY_1
#endif
#ifndef ST7920_DELAY_2
#define ST7920_DELAY_2 CPU_ST7920_DELAY_2
#endif
#ifndef ST7920_DELAY_3
#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) {
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
}
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
}
#define ST7920_CS() {WRITE(ST7920_CS_PIN,1);u8g_10MicroDelay();}
@ -138,6 +185,7 @@ class U8GLIB_ST7920_128X64_RRD : public U8GLIB {
U8GLIB_ST7920_128X64_RRD(uint8_t dummy) : U8GLIB(&u8g_dev_st7920_128x64_rrd_sw_spi) { UNUSED(dummy); }
};
#pragma GCC reset_options
#endif //U8GLIB_ST7920
#endif //ULCDST7920_H