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https://github.com/qmk/qmk_firmware.git
synced 2025-07-16 12:51:47 +00:00
Minor formatting updates to the SerialToLCD project.
This commit is contained in:
Dean Camera
parent
2e757d8c38
commit
bd3f6794dd
@ -83,11 +83,11 @@ static void HD44780_WriteByte(const uint8_t c)
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static void HD44780_PowerUp4Bit(void)
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static void HD44780_PowerUp4Bit(void)
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{
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{
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/* Wait for more than 40 ms after VCC rises to 2.7 V */
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/* Wait for more than 40 ms after VCC rises to 2.7 V */
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_delay_ms(40);
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_delay_ms(40);
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HD44780_WriteNibble(0x03); // FN_SET 8-bit
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HD44780_WriteNibble(0x03); // FN_SET 8-bit
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/* Wait for more than 4.1 ms */
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/* Wait for more than 4.1 ms */
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_delay_ms(5);
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_delay_ms(5);
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HD44780_WriteNibble(0x03); // FN_SET 8-bit
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HD44780_WriteNibble(0x03); // FN_SET 8-bit
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@ -95,12 +95,12 @@ static void HD44780_PowerUp4Bit(void)
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_delay_us(100);
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_delay_us(100);
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HD44780_WriteNibble(0x03); // FN_SET 8-bit
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HD44780_WriteNibble(0x03); // FN_SET 8-bit
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/* From now on we must allow 40us for each command */
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/* From now on we must allow 40us for each command */
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_delay_us(50);
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_delay_us(50);
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HD44780_WriteNibble(0x02); // FN_SET 4-bit
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HD44780_WriteNibble(0x02); // FN_SET 4-bit
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/* The LCD is now in 4-bit mode so we can continue
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/* The LCD is now in 4-bit mode so we can continue
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using the 4-bit API */
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using the 4-bit API */
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_delay_us(50);
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_delay_us(50);
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}
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}
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@ -43,16 +43,16 @@
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#include <avr/power.h>
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#include <avr/power.h>
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/* Macros: */
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/* Macros: */
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#define RS (0x10) // PD4
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#define RS (1 << 4) /* PD4 */
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#define ENABLE (0x80) // PD7
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#define ENABLE (1 << 7) /* PD7 */
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#define HI4_MASK (0xF0)
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#define HI4_MASK 0xF0
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#define LO4_MASK (0x0F) // PD0..3
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#define LO4_MASK 0x0F /* PD0-PD3 */
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#define ALL_BITS (RS|ENABLE|LO4_MASK)
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#define ALL_BITS (RS | ENABLE | LO4_MASK)
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#define HI4( c ) (( c & HI4_MASK ) >> 4 )
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#define HI4(c) ((c & HI4_MASK) >> 4)
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#define LO4( c ) (( c & LO4_MASK ) >> 0 )
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#define LO4(c) ((c & LO4_MASK) >> 0)
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#define CMD_DISPLAY_ON 0x0C
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#define CMD_DISPLAY_ON 0x0C
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@ -33,31 +33,6 @@
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*
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*
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* Main source file for the SerialToLCD program. This file contains the main tasks of
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* Main source file for the SerialToLCD program. This file contains the main tasks of
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* the project and is responsible for the initial application hardware configuration.
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* the project and is responsible for the initial application hardware configuration.
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*
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* \section Hardware Information
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*
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* LCD Datasheet: See http://www.sparkfun.com/datasheets/LCD/HD44780.pdf
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*
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* Also see the two articles from EPE which are linked from here:
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* http://en.wikipedia.org/wiki/HD44780_Character_LCD
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*
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* Connections from the Minimus to the HD44780 as shown below.
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*
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* ========================================================= \n
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* Minimus HD44780 Pin \n
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* ========================================================= \n
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* PD0 DB4 11 \n
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* PD1 DB5 12 \n
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* PD2 DB6 13 \n
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* PD3 DB7 14 \n
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* \n
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* PD4 RS 4 \n
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* RW 5 GND \n
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* PD7 EN 6 \n
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* \n
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* 1 GND \n
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* 2 USB +5V \n
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* 3 2k -> GND \n
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*/
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*/
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#include "SerialToLCD.h"
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#include "SerialToLCD.h"
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@ -47,5 +47,51 @@
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* designed to use the Minimum USB AVR board, however it can be modified to suit other hardware
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* designed to use the Minimum USB AVR board, however it can be modified to suit other hardware
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* if desired.
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* if desired.
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*
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*
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* See comments in the SerialToLCD.c source file for hardware pinouts of the Minimus board.
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* LCD Datasheet: http://www.sparkfun.com/datasheets/LCD/HD44780.pdf \n
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* More Information: http://en.wikipedia.org/wiki/HD44780_Character_LCD \n
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*
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* Below are the connections between the AVR Minimus board and LCD.
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*
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* <table>
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* <tr>
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* <td><b>AVR Pin:</b></td>
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* <td><b>HD44780 LCD Pin:</b></td>
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* </tr>
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* <tr>
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* <td>VCC</td>
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* <td>VCC</td>
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* </tr>
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* <tr>
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* <td>GND</td>
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* <td>GND</td>
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* </tr>
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* <tr>
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* <td>PD0</td>
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* <td>DB4</td>
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* </tr>
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* <tr>
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* <td>PD1</td>
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* <td>DB5</td>
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* </tr>
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* <tr>
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* <td>PD2</td>
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* <td>DB6</td>
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* </tr>
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* <tr>
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* <td>PD3</td>
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* <td>DB7</td>
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* </tr>
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* <tr>
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* <td>PD4</td>
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* <td>/RS</td>
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* </tr>
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* <tr>
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* <td>GND</td>
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* <td>/RW</td>
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* </tr>
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* <tr>
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* <td>PD7</td>
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* <td>/E</td>
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* </tr>
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* </table>
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*/
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*/
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