ha5pls/AT-VFD
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Fix: changed display digits to 15 according to my vfd

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Refactor: one function to set display mode
Enhancement: made demo program display something
Enhancement: changed compiler optimisation for smaller size
This commit is contained in:
Derisis13
2022-03-19 19:03:03 +01:00
parent e7e988c44d
commit 934cbc2441
4 changed files with 19 additions and 28 deletions
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2
Makefile
View File

@@ -3,7 +3,7 @@ MCU=atmega88
F_CPU=8000000UL
CC=avr-gcc
OBJCOPY=avr-objcopy
CFLAGS=-std=c99 -Wall -g -O3 -mmcu=${MCU} -DF_CPU=${F_CPU} -I/usr/lib/avr/include/
CFLAGS=-std=c99 -Wall -g -Os -mcall-prologues -mmcu=${MCU} -DF_CPU=${F_CPU} -I/usr/lib/avr/include/
TARGET=main
SRCS=main.c PT6302.c PT6302.h

15
PT6302.c
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@@ -93,8 +93,7 @@ void set_duty (uint8_t brightness)
{
brightness = 7;
}
const uint8_t command = 0x50 | brightness;
transmit_byte (command);
transmit_byte (0x50 | brightness);
}
void set_digits (uint8_t digit_count)
@@ -138,6 +137,7 @@ void set_CGRAM (const uint8_t address, const uint8_t *data, uint8_t size)
}
transmit_bytes (payload, size);
}
void set_DCRAM (const uint8_t address, const uint8_t *cg_address, uint8_t size)
{
if (address > DISPLAY_DIGITS)
@@ -152,17 +152,12 @@ void set_DCRAM (const uint8_t address, const uint8_t *cg_address, uint8_t size)
}
transmit_bytes (payload, size);
}
void all_on (void)
void set_display_mode (enum display_modes mode)
{
const uint8_t command = 0x72;
transmit_byte (command);
transmit_byte (mode | 0x70);
}
void all_off (void)
{
const uint8_t command = 0x71;
transmit_byte (command);
}
void PT6302_reset (void)
{
PORTC &= ~RSTpin;

18
PT6302.h
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@@ -43,6 +43,12 @@ enum RAM_types {
ADRAM = 0x30,
};
enum display_modes {
NORMAL_MODE = 0x0,
ALL_ON = 0x1,
ALL_OFF = 0x2,
};
/* -------------------------------------------------------------
* Initial setup for the VFD controller interface
* Sets up the connected pins and leaves them in inactive state.
@@ -122,14 +128,8 @@ void set_CGRAM (uint8_t address, const uint8_t *data, uint8_t size);
void set_ADRAM (uint8_t address, const uint8_t *data, uint8_t size);
/* -----------------------------------------
* Turn all outputs of the VFD controller on
* This is primarily used for testing
* Sets the VFD operation mode
* See operation modes in enum display_modes
* Handles the entire communication
* ----------------------------------------- */
void all_on (void);
/* ------------------------------------------
* Turn all outputs of the VFD controller off
* Handles the entire communication
* ------------------------------------------ */
void all_off (void);
void set_display_mode (enum display_modes mode);

12
main.c
View File

@@ -18,8 +18,7 @@
* USA
*/
#define F_CPU 8000000UL
#define DISPLAY_DIGITS 12
#define DISPLAY_DIGITS 15
#include <avr/io.h>
#include <util/delay.h>
@@ -28,10 +27,10 @@
int main ()
{
static const uint8_t digitstates[] =
{0b11, 0b11, 0b11, 0b11, 0b11, 0b11, 0b11, 0b11, 0b11, 0b11, 0b11, 0b11};
{0b00, 0b00, 0b00, 0b00, 0b00, 0b00, 0b00, 0b00, 0b00, 0b00, 0b00, 0b00};
static const uint8_t custom_chars[8 * 5] = {0};
static const uint8_t characters[] =
{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
{0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x48, 0x41, 0x35, 0x4B, 0x46, 0x55, 0x20, 0x20, 0x20};
PT6302_startup ();
set_ports (1, 1);
set_digits (DISPLAY_DIGITS);
@@ -39,11 +38,8 @@ int main ()
set_ADRAM (0, digitstates, DISPLAY_DIGITS);
set_CGRAM (0, custom_chars, 8);
set_DCRAM (0, characters, DISPLAY_DIGITS);
set_display_mode (NORMAL_MODE);
while (1)
{
all_on ();
_delay_us (1000);
all_off ();
_delay_us (1000);
}
}