firexx / ssd1803a_i2c Goto Github PK
View Code? Open in Web Editor NEWLCD library for MIDAS display with SSD1803a controller over i2c interface.
License: GNU Lesser General Public License v2.1
LCD library for MIDAS display with SSD1803a controller over i2c interface.
License: GNU Lesser General Public License v2.1
Hello Firexx,
I am trying to use the library you wrote with 16x4 character displays (EA DOGS164N-A, https://www.mouser.fr/datasheet/2/127/dogs164e-1532335.pdf ), since they use the same SSD1803A controller as your MIDAS display.
For now, I can't make it work. My poor skills in writing or editing libraries don't allow me to find the cause of the problem. I can only set the contrast, but text won't print on the display.
Could you help me please ?
Thank you a lot for your work and time.
Julien.
Hi,
Confirmed it's incorrect, forgot to set back to DDRAM after write.
Same code as an example but converted for nrf52.
uint8_t *c = &characters[0];
uint8_t x = 0;
while (c < (&characters[0] + sizeof(characters))) {
i = 0;
dmaBuffer.transfer[i++] = INSTRUCTION_COMMAND;
dmaBuffer.transfer[i++] = COMMAND_ADDRESS_CGRAM | x << 3;
txWait(i);
for(uint8_t j = 0; j < 8; j++) {
i = 0;
dmaBuffer.transfer[i++] = INSTRUCTION_DATA;
dmaBuffer.transfer[i++] = *c;
c++;
txWait(i);
}
i = 0;
dmaBuffer.transfer[i++] = INSTRUCTION_COMMAND;
dmaBuffer.transfer[i++] = COMMAND_ADDRESS_DDRAM;
txWait(i);
x++;
}
Hi.
Have you thought about adding so that it is possible and choose if you want to show different number of lines with different height of text (Double Height)?
Ex.
1 row of standard height
1 row of standard height
1 row of double height
as showed in "https://www.lcd-module.de/fileadmin/eng/pdf/zubehoer/ssd1803a_2_0.pdf" page 44
This library is working very well.
Thanks for all your work.
My problem is the different display. I send the 'A' character but the screen display a different character.
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