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berel
Joined: 20 Oct 2011
Posts: 15
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 Posted: Wed Jun 24, 2020 10:07 am |
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Hello Ttelmah,
thanks for adding additional explanations !!!
It makes fun using the OLEDS, even the small 128x32 one, also for debugging very helpful. |
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MikeW
Joined: 15 Sep 2003
Posts: 184
Location: Warrington UK
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| Posted: Mon Jun 07, 2021 9:38 am |
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@Ttelmah
I tried the revised bargraph routine.
When ctr is =100, I still get a blank at the end. |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19539
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| Posted: Wed Jun 09, 2021 6:07 am |
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You realise that you need both the code change, and the alteration to the
font used?. The right hand closing character has to be changed to make it
work. |
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MikeW
Joined: 15 Sep 2003
Posts: 184
Location: Warrington UK
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| Posted: Sun Jun 13, 2021 8:52 am |
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@Ttelmah
That fixed it, thank you. |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19539
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| Posted: Mon Jun 14, 2021 11:02 pm |
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Goodly. 
Have fun |
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blowtorch
Joined: 11 Jun 2013
Posts: 35
Location: Cape Town
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| 128 x 32 changes |
| Posted: Fri Aug 27, 2021 12:49 pm |
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Hi Ttelmah
Thank you for your great library - I have it working with a tiny 128 x 32 display. The changes required for this was to modify the value in the init_sequence for the command S_SETCOMPINS. This is command 0xDA. Change the value (next byte) from 0x12 to 0x02. If this is not done the vertical spacing is off.
And of course the define S_LCDHEIGHT should be changed to 32.
Thanks again for all your work and willingness to share. |
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hsogukpinar
Joined: 20 Sep 2021
Posts: 8
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| ssd1309 library code |
| Posted: Tue Sep 21, 2021 12:12 am |
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| Ttelmah wrote: | As an update, I've just been running this with the SSD1309 (gives larger displays like 2.4"), and it runs fine. Only thing that gave problems was I found these needed a reset signal to stay low for a little while after power was applied to work reliably (ended up using a capacitor on the RES line), for reliable operation. Because this takes time, I had to pause for longer at boot. With this done works well.  |
Can you please share the SSD 1309 display code |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19539
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| Posted: Thu Sep 23, 2021 5:03 am |
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It is the same code.
Provided you have the SSD1309 wired for I2C comms, and with the caveat
about needing a reset to the chip (either a resistive/diode/capacitive reset
to the controller chip or another PIC line to operate the reset signal).
Obviously you need to pause at the start till the reset is done, and then
about another 20mSec. |
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MikeW
Joined: 15 Sep 2003
Posts: 184
Location: Warrington UK
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| Posted: Wed Aug 24, 2022 8:54 am |
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@hsogukpinar
Just bought a 1309 display.
What value of reset capacitor would you suggest ? |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19539
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| Posted: Wed Sep 07, 2022 6:18 am |
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Not who you were asking.
Look at figure 8.16 in the data sheet.
Note the level on RES can be high or low to the left. The point is it
must not go up to high till at least 3uSec after Vdd, and Vcc must
rise after this.
Some fiddling with capacitor values needed, depending on your supply. |
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paulie2907
Joined: 25 Jun 2020
Posts: 5
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| height problem |
| Posted: Mon Mar 13, 2023 8:17 pm |
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Ttelmah : I use your metod, it work with some edit. But bottom side is showing some pixel and Y adreses not work for me (work but not idealy), i can´t find proble. ... look
driver set (for check)
| Code: | //directly from the data sheet - commands - not all used
#define S_EXTERNALVCC 0x01
#define S_SWITCHCAPVCC 0x02
#define S_SETLOWCOLUMN 0x00
#define S_SETHIGHCOLUMN 0x10
#define S_MEMORYMODE 0x20
#define S_COLUMNADDR 0x21
#define S_PAGEADDR 0x22
#define S_SETSTARTLINE 0x40
#define S_ROWADDRESS 0xB0//----------------
#define S_SETCONTRAST 0x81
#define S_CHARGEPUMP 0x8D
#define S_SEGREMAP 0xA0//A0
#define S_DISPLAYALLON_RESUME 0xA4
#define S_DISPLAYALLON 0xA5
#define S_NORMALDISPLAY 0xA6
#define S_INVERTDISPLAY 0xA7
#define S_SETMULTIPLEX 0xA8
#define S_DISPLAYOFF 0xAE
#define S_DISPLAYON 0xAF
#define S_COMSCANINC 0xC0
#define S_COMSCANDEC 0xC8
#define S_SETDISPLAYOFFSET 0xD3
#define S_SETCOMPINS 0xDA
#define S_SETVCOMDETECT 0xDB
#define S_SETDISPLAYCLOCKDIV 0xD5
#define S_SETPRECHARGE 0xD9
#define DIV_RATIO 0xA0//recommended ratio
#define MULTIPLEX 0xA0 //and multiplex
#define INT_VCC 0x14
ROM BYTE init_sequence[] = S_DISPLAYOFF,
S_SETDISPLAYCLOCKDIV,
DIV_RATIO,
S_SETMULTIPLEX,
MULTIPLEX,
S_SETDISPLAYOFFSET,
0, // no offset
S_SETSTARTLINE,
S_CHARGEPUMP,
INT_VCC, // using internal VCC
S_MEMORYMODE, //Since byte is vertical writing column by column
0, // default horizontal addressing
(S_SEGREMAP | 0x01), // rotate screen 180
S_COMSCANDEC,
S_SETCOMPINS,
0x12,
S_SETCONTRAST,
0x8F, //experiment.... 0xCf for 1306/org : 0XEF
S_SETPRECHARGE,
0xF1,
S_SETVCOMDETECT,
0x40,
S_DISPLAYALLON_RESUME,
S_NORMALDISPLAY,
S_DISPLAYON; //switch on OLED |
main
| Code: |
//Inicializace Displaye
void Display_init(void)
{
output_high(POWER_LCD); //Zapne napájení pro LCD
delay_ms(200);
output_low(SSD1306_RST); //Resetuje LCD (logická 0)
delay_ms(200);
output_high(SSD1306_RST); //Vypne reset (logická 1)
delay_ms(200);
Display_Backlight(2); //Nastaví MAX podsvícení
OLED_commands(init_sequence,sizeof(init_sequence)); // Sekvence příkazů z knihovny
}
void main(void)
{
// Zabliká LED při zapnutí
for(int8 q=0; ;q<21; q++)
{
delay_ms(50);
output_toggle(LED);
}
output_low(LED);
Display_init();
int8 ctr;
char text[50];
//First try some text
OLED_CLS(); //clear the physical screen
set=true;
clear_window(); //clear the window buffer
OLED_gotoxy(0,0);
strcpy(text,"SERVICE MODE - Test");
size=NORMAL;
OLED_text(text,strlen(text));
delay_ms(5000);
//now some graphics
line(0,1,128,1); //draw line in window
line(0,3,128,3); //draw line in window
line(0,5,128,5); //draw line in window
line(0,7,128,7); //draw line in window
line(0,9,128,9); //draw line in window
line(0,11,128,11); //draw line in window
line(0,13,128,13); //draw line in window
line(0,31,128,31); //draw line in window
//line(10,10,61,0);//and a second
//now write the window to the screen
draw_window(0,0); //at 64 pixels across and top of screen
//delay_ms(5000);
//set=FALSE; //inverted drawing
//clear_window(); //clear the window to fully set!
//line(0,0,60,15);
//line(20,10,40,10);
//circle(24,8,8,1); //just touch the edge of the window
//draw_window(0,4); //put this window half way down screen
delay_ms(1000);
while (TRUE)
{
delay_ms(1000);
output_toggle(LED);
}
; //and stop7 bez toho to stojí na nule (do odpojení baterie);
//OSC_Enable();
} |
I am answering based on a previous topic in my thread :
http://www.ccsinfo.com/forum/viewtopic.php?t=59975
I have this LCD : https://www.ebay.com/itm/301220791533
This is image showing the problem (look on line Y adresses)
https://www.romar-electronic.cz/3.jpg
https://www.romar-electronic.cz/4.jpg |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19539
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| Posted: Tue Mar 14, 2023 7:29 am |
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Have you tried with #define SH1106?.
This is needed for the chips that are offset a couple of bits away from the
origin. |
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paulie2907
Joined: 25 Jun 2020
Posts: 5
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| Posted: Tue Mar 14, 2023 8:06 am |
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| Ttelmah wrote: | Have you tried with #define SH1106?.
This is needed for the chips that are offset a couple of bits away from the
origin. |
Yes i have use this define | Code: | void OLED_address(unsigned int8 x, unsigned int8 y)
{
//routine to move the memory pointers to x,y.
//x is 0 to 127 (column), y (row) is 0 to 7 (page only)
#ifdef SH1106
x+=4;
#endif
i2c_start(SSD1306_STREAM);
i2c_write(SSD1306_STREAM, SSDADDR); //select the display
i2c_write(SSD1306_STREAM, COMMAND_ONLY); //we are sending command(s)
i2c_write(SSD1306_STREAM, S_ROWADDRESS | y); //select the display row
i2c_write(SSD1306_STREAM, S_SETLOWCOLUMN | (x & 0x0F)); //low col address
i2c_write(SSD1306_STREAM, S_SETHIGHCOLUMN | ((x>>4) & 0x0F)); //high col address
i2c_stop(SSD1306_STREAM);
} //also made more efficient
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I must edit x to shift to 4 |
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paulie2907
Joined: 25 Jun 2020
Posts: 5
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| Posted: Tue Mar 14, 2023 3:13 pm |
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I fix "ramdomly pixel" on init display.
But display still only show half .
On code : | Code: | line(0,0,128,0); //line UP
line(0,0,0,31); //line left
line(126,0,126,31); //line in right
line(0,32,128,32); //line bottom |
But fill on display work normally. Can see on image
https://www.romar-electronic.cz/5.jpg
https://www.romar-electronic.cz/6.jpg
Thanks for reply |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19539
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| Posted: Mon Mar 20, 2023 7:43 am |
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That is not how you use the define.
All you do is before loading the driver, have the line:
#DEFINE SH1106
The driver then switches the origin and calculations it does based on this.
The big problem though is knowing how your chip actually relates to the
'real' SSD and SH chips. Do you have the actual chip number, and a link
to the data sheet for this?. Post these, and I'll see what has to be changed
in the driver. |
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