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Minor formatting updates to the SerialToLCD project.

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This commit is contained in:
Dean Camera 2012-04-14 21:47:02 +00:00
parent 2e757d8c38
commit bd3f6794dd
4 changed files with 59 additions and 38 deletions
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10
Projects/SerialToLCD/Lib/HD44780.c
View file

@ -83,11 +83,11 @@ static void HD44780_WriteByte(const uint8_t c)
static void HD44780_PowerUp4Bit(void)
{
/* Wait for more than 40 ms after VCC rises to 2.7 V */
/* Wait for more than 40 ms after VCC rises to 2.7 V */
_delay_ms(40);
HD44780_WriteNibble(0x03); // FN_SET 8-bit
/* Wait for more than 4.1 ms */
/* Wait for more than 4.1 ms */
_delay_ms(5);
HD44780_WriteNibble(0x03); // FN_SET 8-bit
@ -95,12 +95,12 @@ static void HD44780_PowerUp4Bit(void)
_delay_us(100);
HD44780_WriteNibble(0x03); // FN_SET 8-bit
/* From now on we must allow 40us for each command */
/* From now on we must allow 40us for each command */
_delay_us(50);
HD44780_WriteNibble(0x02); // FN_SET 4-bit
/* The LCD is now in 4-bit mode so we can continue
using the 4-bit API */
/* The LCD is now in 4-bit mode so we can continue
using the 4-bit API */
_delay_us(50);
}

14
Projects/SerialToLCD/Lib/HD44780.h
View file

@ -43,16 +43,16 @@
#include <avr/power.h>
/* Macros: */
#define RS (0x10) // PD4
#define ENABLE (0x80) // PD7
#define RS (1 << 4) /* PD4 */
#define ENABLE (1 << 7) /* PD7 */
#define HI4_MASK (0xF0)
#define LO4_MASK (0x0F) // PD0..3
#define HI4_MASK 0xF0
#define LO4_MASK 0x0F /* PD0-PD3 */
#define ALL_BITS (RS|ENABLE|LO4_MASK)
#define ALL_BITS (RS | ENABLE | LO4_MASK)
#define HI4( c ) (( c & HI4_MASK ) >> 4 )
#define LO4( c ) (( c & LO4_MASK ) >> 0 )
#define HI4(c) ((c & HI4_MASK) >> 4)
#define LO4(c) ((c & LO4_MASK) >> 0)
#define CMD_DISPLAY_ON 0x0C