ATtiny85-PhoneChargeGuard
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Published
20 hours ago •
wagiminator
wagiminator
How exactly are these fonts made?
Hi, im so sorry to create a issue, i could not find any direct way to contact you. ive been a big fan of your projects and mainly how you play with the OLED displays and optimize the code. i was trying to use some fonts of yours in my code, but i saw that you have mostly stripped down a lot of things to save the memory. My most favouraite have been the 7 Segment style font. now i was wanting to use some letters like "I" , "A" or even in the big font. but i am so confused on how exactly have you made those fonts that i just was forced to contact you here as an issue. again sorry for that. but can you guide me how can i actually make more alphabets of the following fonts from your different codes.
// OLED 6x16 font
const uint8_t OLED_FONT_BIG[] = {
0x7C, 0x1F, 0x02, 0x20, 0x02, 0x20, 0x02, 0x20, 0x02, 0x20, 0x7C, 0x1F, // 0 0
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7C, 0x1F, // 1 1
0x00, 0x1F, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x7C, 0x00, // 2 2
0x00, 0x00, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x7C, 0x1F, // 3 3
0x7C, 0x00, 0x80, 0x00, 0x80, 0x00, 0x80, 0x00, 0x80, 0x00, 0x7C, 0x1F, // 4 4
0x7C, 0x00, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x00, 0x1F, // 5 5
0x7C, 0x1F, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x00, 0x1F, // 6 6
0x7C, 0x00, 0x02, 0x00, 0x02, 0x00, 0x02, 0x00, 0x02, 0x00, 0x7C, 0x1F, // 7 7
0x7C, 0x1F, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x7C, 0x1F, // 8 8
0x7C, 0x00, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x7C, 0x1F, // 9 9
0x00, 0x00, 0xF0, 0x3F, 0x8C, 0x00, 0x82, 0x00, 0x8C, 0x00, 0xF0, 0x3F, // 10 A
0x00, 0x00, 0xFE, 0x07, 0x00, 0x18, 0x00, 0x20, 0x00, 0x18, 0xFE, 0x07, // 11 V
0x00, 0x00, 0xFE, 0x1F, 0x00, 0x20, 0x00, 0x1F, 0x00, 0x20, 0xFE, 0x1F, // 12 W
0x00, 0x00, 0xFE, 0x3F, 0x00, 0x01, 0x80, 0x00, 0x80, 0x00, 0x00, 0x3F, // 13 h
0x00, 0x00, 0x80, 0x3F, 0x80, 0x00, 0x80, 0x3F, 0x80, 0x00, 0x00, 0x3F, // 14 m
0x00, 0x00, 0x00, 0x00, 0x30, 0x06, 0x30, 0x06, 0x00, 0x00, 0x00, 0x00, // 15 :
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 16 SPACE
};
another one is for the 7 segment style
// OLED 5x16 font 7 Segment
const uint8_t OLED_FONT[] = {
0x7C, 0x1F, 0x02, 0x20, 0x02, 0x20, 0x02, 0x20, 0x7C, 0x1F, // 0 0
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7C, 0x1F, // 1 1
0x00, 0x1F, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x7C, 0x00, // 2 2
0x00, 0x00, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x7C, 0x1F, // 3 3
0x7C, 0x00, 0x80, 0x00, 0x80, 0x00, 0x80, 0x00, 0x7C, 0x1F, // 4 4
0x7C, 0x00, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x00, 0x1F, // 5 5
0x7C, 0x1F, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x00, 0x1F, // 6 6
0x0C, 0x00, 0x02, 0x00, 0x02, 0x00, 0x02, 0x00, 0x7C, 0x1F, // 7 7
0x7C, 0x1F, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x7C, 0x1F, // 8 8
0x7C, 0x00, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x7C, 0x1F, // 9 9
0xF0, 0x3F, 0x8C, 0x00, 0x82, 0x00, 0x8C, 0x00, 0xF0, 0x3F, // A 10
0xFE, 0x07, 0x00, 0x18, 0x00, 0x20, 0x00, 0x18, 0xFE, 0x07, // V 11
0x00, 0x00, 0x30, 0x06, 0x30, 0x06, 0x00, 0x00, 0x00, 0x00, // : 12
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 13
0x02, 0x00, 0x02, 0x00, 0x7E, 0x3F, 0x02, 0x00, 0x02, 0x00, // T 14
};
can you please give some guidance? or am i totally missing something? as well these fonts are taking from different projects of yours, im trying to implement this on STM32G030F6P6TR, i do have memory restrictions too. heres the C code attached.
/*
* SSD1306.c
*
* Created on: Dec 2, 2023
* Author: parthasus
*/
#include "stm32g0xx_hal.h"
#include "SSD1306.h"
// extern the i2c handler
extern I2C_HandleTypeDef hi2c2;
#define pgm_read_byte(addr) (*(const unsigned char *)(addr))
// Oled definitions
#define OLED_CMD_MODE 0x00 // set command mode
#define OLED_DAT_MODE 0x40 // set data mode
#define OLED_INIT_LEN 11 // 9: no screen flip, 11: screen flip
// OLED init settings
const uint8_t OLED_INIT_CMD[] = {
0xA8, 0x1F, // set multiplex for 128x32
0x20, 0x01, // set vertical memory addressing mode
0xDA, 0x02, // set COM pins hardware configuration to sequential
0x8D, 0x14, // enable charge pump
0xAF, // switch on OLED
0xA1, 0xC8 // flip the screen
};
// OLED current page
uint8_t OLED_page;
// OLED 5x8 font (adapted from Neven Boyanov and Stephen Denne)
const uint8_t OLED_FONT_SMALL[] = {
0x3E, 0x51, 0x49, 0x45, 0x3E, // 0 0
0x00, 0x42, 0x7F, 0x40, 0x00, // 1 1
0x42, 0x61, 0x51, 0x49, 0x46, // 2 2
0x21, 0x41, 0x45, 0x4B, 0x31, // 3 3
0x18, 0x14, 0x12, 0x7F, 0x10, // 4 4
0x27, 0x45, 0x45, 0x45, 0x39, // 5 5
0x3C, 0x4A, 0x49, 0x49, 0x30, // 6 6
0x01, 0x71, 0x09, 0x05, 0x03, // 7 7
0x36, 0x49, 0x49, 0x49, 0x36, // 8 8
0x06, 0x49, 0x49, 0x29, 0x1E, // 9 9
0x7C, 0x12, 0x11, 0x12, 0x7C, // 10 A
0x1F, 0x20, 0x40, 0x20, 0x1F, // 11 V
0x3F, 0x40, 0x38, 0x40, 0x3F, // 12 W
0x7F, 0x08, 0x04, 0x04, 0x78, // 13 h
0x7C, 0x04, 0x18, 0x04, 0x78, // 14 m
0x00, 0x36, 0x36, 0x00, 0x00, // 15 :
0x00, 0x00, 0x00, 0x00, 0x00, // 16 SPACE
0x3E, 0x41, 0x41, 0x41, 0x22, // 17 C
0x7F, 0x49, 0x49, 0x49, 0x41, // 18 E
0x3E, 0x41, 0x49, 0x49, 0x7A, // 19 G
0x7F, 0x08, 0x08, 0x08, 0x7F, // 20 H
0x00, 0x41, 0x7F, 0x41, 0x00, // 21 I
0x7F, 0x40, 0x40, 0x40, 0x40, // 22 L
0x7F, 0x02, 0x0C, 0x02, 0x7F, // 23 M
0x7F, 0x09, 0x09, 0x09, 0x06, // 24 P
0x7F, 0x09, 0x19, 0x29, 0x46, // 25 R
0x46, 0x49, 0x49, 0x49, 0x31, // 26 S
0x01, 0x01, 0x7F, 0x01, 0x01, // 27 T
0x3F, 0x40, 0x40, 0x40, 0x3F, // 28 U
0x00, 0x44, 0x7D, 0x40, 0x00, // 29 i
0x7C, 0x08, 0x04, 0x04, 0x78, // 30 n
0x7F, 0x41, 0x41, 0x22, 0x1C, // D 31
0x00, 0x60, 0x60, 0x00, 0x00, // . 32
};
// OLED 6x16 font
const uint8_t OLED_FONT_BIG[] = {
0x7C, 0x1F, 0x02, 0x20, 0x02, 0x20, 0x02, 0x20, 0x02, 0x20, 0x7C, 0x1F, // 0 0
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7C, 0x1F, // 1 1
0x00, 0x1F, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x7C, 0x00, // 2 2
0x00, 0x00, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x7C, 0x1F, // 3 3
0x7C, 0x00, 0x80, 0x00, 0x80, 0x00, 0x80, 0x00, 0x80, 0x00, 0x7C, 0x1F, // 4 4
0x7C, 0x00, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x00, 0x1F, // 5 5
0x7C, 0x1F, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x00, 0x1F, // 6 6
0x7C, 0x00, 0x02, 0x00, 0x02, 0x00, 0x02, 0x00, 0x02, 0x00, 0x7C, 0x1F, // 7 7
0x7C, 0x1F, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x7C, 0x1F, // 8 8
0x7C, 0x00, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x7C, 0x1F, // 9 9
0x00, 0x00, 0xF0, 0x3F, 0x8C, 0x00, 0x82, 0x00, 0x8C, 0x00, 0xF0, 0x3F, // 10 A
0x00, 0x00, 0xFE, 0x07, 0x00, 0x18, 0x00, 0x20, 0x00, 0x18, 0xFE, 0x07, // 11 V
0x00, 0x00, 0xFE, 0x1F, 0x00, 0x20, 0x00, 0x1F, 0x00, 0x20, 0xFE, 0x1F, // 12 W
0x00, 0x00, 0xFE, 0x3F, 0x00, 0x01, 0x80, 0x00, 0x80, 0x00, 0x00, 0x3F, // 13 h
0x00, 0x00, 0x80, 0x3F, 0x80, 0x00, 0x80, 0x3F, 0x80, 0x00, 0x00, 0x3F, // 14 m
0x00, 0x00, 0x00, 0x00, 0x30, 0x06, 0x30, 0x06, 0x00, 0x00, 0x00, 0x00, // 15 :
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 16 SPACE
};
// OLED 5x16 font 7 Segment
const uint8_t OLED_FONT[] = {
0x7C, 0x1F, 0x02, 0x20, 0x02, 0x20, 0x02, 0x20, 0x7C, 0x1F, // 0 0
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7C, 0x1F, // 1 1
0x00, 0x1F, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x7C, 0x00, // 2 2
0x00, 0x00, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x7C, 0x1F, // 3 3
0x7C, 0x00, 0x80, 0x00, 0x80, 0x00, 0x80, 0x00, 0x7C, 0x1F, // 4 4
0x7C, 0x00, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x00, 0x1F, // 5 5
0x7C, 0x1F, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x00, 0x1F, // 6 6
0x0C, 0x00, 0x02, 0x00, 0x02, 0x00, 0x02, 0x00, 0x7C, 0x1F, // 7 7
0x7C, 0x1F, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x7C, 0x1F, // 8 8
0x7C, 0x00, 0x82, 0x20, 0x82, 0x20, 0x82, 0x20, 0x7C, 0x1F, // 9 9
0xF0, 0x3F, 0x8C, 0x00, 0x82, 0x00, 0x8C, 0x00, 0xF0, 0x3F, // A 10
0xFE, 0x07, 0x00, 0x18, 0x00, 0x20, 0x00, 0x18, 0xFE, 0x07, // V 11
0x00, 0x00, 0x30, 0x06, 0x30, 0x06, 0x00, 0x00, 0x00, 0x00, // : 12
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 13
0x02, 0x00, 0x02, 0x00, 0x7E, 0x3F, 0x02, 0x00, 0x02, 0x00, // T 14
};
// Internal Function Prototype
void i2cWrite(uint8_t oledAddr, uint8_t oledReg, uint8_t oledData);
// global functions
uint8_t dispInit()
{
if(HAL_I2C_IsDeviceReady(&hi2c2, OLED_ADDR, 2, 2000) != HAL_OK)
{
return 0;
}
for(uint8_t i = 0; i < OLED_INIT_LEN; i++)
{
i2cWrite(OLED_ADDR, OLED_CMD_MODE, OLED_INIT_CMD[i]);
}
return 1;
}
void dispSetCursor(uint8_t xPos, uint8_t yPos)
{
i2cWrite(OLED_ADDR, OLED_CMD_MODE, 0x22);
i2cWrite(OLED_ADDR, OLED_CMD_MODE, yPos);
(yPos > 1) ? (i2cWrite(OLED_ADDR, OLED_CMD_MODE, 3)) : (i2cWrite(OLED_ADDR, OLED_CMD_MODE, yPos));
i2cWrite(OLED_ADDR, OLED_CMD_MODE, xPos & 0x0F);
i2cWrite(OLED_ADDR, OLED_CMD_MODE, 0x10 | (xPos >> 4));
i2cWrite(OLED_ADDR, OLED_CMD_MODE, 0xB0 | (yPos));
OLED_page = yPos;
}
void dispClearScreen(void)
{
uint8_t i;
dispSetCursor(0, 0);
for(i = OLED_WIDTH; i; i--) i2cWrite(OLED_ADDR, OLED_DAT_MODE, 0x00);
dispSetCursor(0, 1);
for(i = OLED_WIDTH; i; i--) i2cWrite(OLED_ADDR, OLED_DAT_MODE, 0x02);
dispSetCursor(0, 2);
do { i2cWrite(OLED_ADDR, OLED_DAT_MODE, 0x00); } while (--i);
}
void dispPlotChar(uint8_t ch)
{
if(OLED_page)
{
ch = (ch << 3) + (ch << 2);
i2cWrite(OLED_ADDR, OLED_DAT_MODE, 0x00);
i2cWrite(OLED_ADDR, OLED_DAT_MODE, 0x00);
for(uint8_t i = 12; i; i--)
i2cWrite(OLED_ADDR, OLED_DAT_MODE, pgm_read_byte(&OLED_FONT_BIG[ch++]));
i2cWrite(OLED_ADDR, OLED_DAT_MODE, 0x00);
i2cWrite(OLED_ADDR, OLED_DAT_MODE, 0x00);
}
else
{
ch += (ch << 2);
i2cWrite(OLED_ADDR, OLED_DAT_MODE, 0x00);
for(uint8_t i = 5; i; i--)
i2cWrite(OLED_ADDR, OLED_DAT_MODE, pgm_read_byte(&OLED_FONT_SMALL[ch++]));
//i2cWrite(OLED_ADDR, OLED_DAT_MODE, 0x00);
//i2cWrite(OLED_ADDR, OLED_DAT_MODE, 0x00);
}
}
void dispPlotSevenSegment(uint8_t xPos, uint8_t yPos, uint8_t ch)
{
i2cWrite(OLED_ADDR, OLED_CMD_MODE, 0x22);
i2cWrite(OLED_ADDR, OLED_CMD_MODE, yPos);
(yPos > 1) ? (i2cWrite(OLED_ADDR, OLED_CMD_MODE, 3)) : (i2cWrite(OLED_ADDR, OLED_CMD_MODE, yPos));
i2cWrite(OLED_ADDR, OLED_CMD_MODE, xPos & 0x0F);
i2cWrite(OLED_ADDR, OLED_CMD_MODE, 0x10 | (xPos >> 4));
i2cWrite(OLED_ADDR, OLED_CMD_MODE, 0xB0 | (yPos));
ch = (ch << 1) + (ch << 3);
i2cWrite(OLED_ADDR, OLED_DAT_MODE, 0x00);
i2cWrite(OLED_ADDR, OLED_DAT_MODE, 0x00);
for(uint8_t i = 10; i; i--)
i2cWrite(OLED_ADDR, OLED_DAT_MODE, pgm_read_byte(&OLED_FONT[ch++]));
}
void dispPrintChar(uint8_t ch)
{
dispPlotChar(ch);
}
void dispPrint(const uint8_t *p)
{
uint8_t ch = pgm_read_byte(p);
while(ch < 255)
{
dispPlotChar(ch);
ch = pgm_read_byte(++p);
}
}
// internal functions
void i2cWrite(uint8_t oledAddr, uint8_t oledReg, uint8_t oledData)
{
uint8_t data[2];
data[0] = oledReg;
data[1] = oledData;
HAL_I2C_Master_Transmit(&hi2c2, oledAddr, data, 2, 20);
}
