support st7920 for chipkit
GoogleCodeExporter opened this issue · comments
it has been reported (chipkit forum) that this does not work.
--> maybe polarity has to be changed (like for hw spi)
Original issue reported on code.google.com by olikr...@gmail.com
on 20 Dec 2012 at 9:53
fixed: port access expanded to 16 bit, clock polarity changed
Original comment by olikr...@gmail.com
on 21 Dec 2012 at 5:30
Attachments:
fixed
Original comment by olikr...@gmail.com
on 21 Dec 2012 at 9:16
- Changed state: Fixed
still not working, retest with
U8GLIB_ST7920_128X64 u8g(2,7,6, U8G_PIN_NONE);
Original comment by olikr...@gmail.com
on 22 Dec 2012 at 8:04
- Changed state: Started
Original comment by olikr...@gmail.com
on 22 Dec 2012 at 8:04
- Added labels: Type-Defect
- Removed labels: Type-Enhancement
The following pin assignments are working without problems:
U8GLIB_ST7920_192X32 u8g(13, 11, 10, U8G_PIN_NONE); // SPI
Com: SCK = en = 13, MOSI = rw = 11, CS = di = 10
U8GLIB_ST7920_192X32 u8g(5, 3, 2, U8G_PIN_NONE); // SPI Com:
SCK = en = 13, MOSI = rw = 11, CS = di = 10
U8GLIB_ST7920_192X32 u8g(7, 5, 4, U8G_PIN_NONE); // SPI Com:
SCK = en = 13, MOSI = rw = 11, CS = di = 10
U8GLIB_ST7920_192X32 u8g(6, 4, 3, U8G_PIN_NONE); // SPI Com:
SCK = en = 13, MOSI = rw = 11, CS = di = 10
U8GLIB_ST7920_192X32 u8g(11, 9, 8, U8G_PIN_NONE); // SPI Com:
SCK = en = 13, MOSI = rw = 11, CS = di = 10
closing this issue again
Original comment by olikr...@gmail.com
on 22 Dec 2012 at 1:51
- Changed state: Verified