Search found 70 matches
- Fri Jun 24, 2016 7:10 am
- Forum: Drivers for External Components
- Topic: (WIP) Sitronix ST7735 TFT Display
- Replies: 31
- Views: 40824
Re: (WIP) Sitronix ST7735 TFT Display
good point, but not seen any problems yet, but only updating a few things now and again, not a scrolling console window or anything.
- Wed Jun 22, 2016 8:34 am
- Forum: Drivers for External Components
- Topic: (WIP) Sitronix ST7735 TFT Display
- Replies: 31
- Views: 40824
Re: (WIP) Sitronix ST7735 TFT Display
for efficiency I guess the glyph table would only need to be 2 or 4 bits per pixel,
Is it really as simple as : new pixel = ((1-weight) * old) + (weight*color) ??
Sounds like a challenge
Bresenham's line drawing algorithm is straightforward BUT not if you want to ant alias the jaggies
Is it really as simple as : new pixel = ((1-weight) * old) + (weight*color) ??
Sounds like a challenge
Bresenham's line drawing algorithm is straightforward BUT not if you want to ant alias the jaggies
- Wed Jun 22, 2016 7:51 am
- Forum: Drivers for External Components
- Topic: (WIP) Sitronix ST7735 TFT Display
- Replies: 31
- Views: 40824
Re: (WIP) Sitronix ST7735 TFT Display
I'm guessing that you could store a glyph table with byte values representing weight ie 255 is full on and 0 is transparent. Then you could use a run time algortithm to blend into the background display, but sounds quite tricky and would need a backing buffer or are you suggesting something complete...
- Wed Jun 22, 2016 7:35 am
- Forum: ESP8266 boards
- Topic: Making sounds
- Replies: 12
- Views: 21955
Re: Making sounds
I hooked up the ghi Tunes module to the pyboard pwm and it seems to be fine,
Here is some code (in C#) that parse the rttl format of which there are many songs available
https://www.ghielectronics.com/communit ... /entry/839
Here is some code (in C#) that parse the rttl format of which there are many songs available
https://www.ghielectronics.com/communit ... /entry/839
- Wed Jun 22, 2016 7:25 am
- Forum: Drivers for External Components
- Topic: (WIP) Sitronix ST7735 TFT Display
- Replies: 31
- Views: 40824
Re: (WIP) Sitronix ST7735 TFT Display
wrt fonts one technique I found quite useful is to store bitmap images of antialiased fonts on the sd card,. This presupposes you know the background color and foreground color, but there is plenty of room for lucida green 24 say and Helvetica alice blue 12, and nowadays most displays should be uncl...
- Tue Jun 21, 2016 5:46 am
- Forum: Drivers for External Components
- Topic: (WIP) Sitronix ST7735 TFT Display
- Replies: 31
- Views: 40824
Re: (WIP) Sitronix ST7735 TFT Display
well I guessed that it was a typo on the backing field, the ability to replace the function with a simple assignment is a powerful tool ?, (adults only coding) @platforma : similar in backlight I believe ps got the ghi n18 up and running, had to configure the spi correctly and init is different (as ...
- Mon Jun 20, 2016 6:47 pm
- Forum: General Discussion and Questions
- Topic: machine or pyb
- Replies: 2
- Views: 5111
Re: machine or pyb
thanks dave, I can see that machine would be more generic across platforms.
- Mon Jun 20, 2016 5:20 pm
- Forum: General Discussion and Questions
- Topic: machine or pyb
- Replies: 2
- Views: 5111
machine or pyb
been away a while and came back to play and I'm confused as to which import I should use on the pyboard
import machine
or
import pyb
they both seem to do the same thing - are they the same thing?
import machine
or
import pyb
they both seem to do the same thing - are they the same thing?
- Mon Jun 20, 2016 5:15 pm
- Forum: Drivers for External Components
- Topic: (WIP) Sitronix ST7735 TFT Display
- Replies: 31
- Views: 40824
Re: (WIP) Sitronix ST7735 TFT Display
does this method do something I don't understand.
Code: Select all
def power(self, state=None):
"""
Get/set display power.
"""
if state is None:
return self.power # ???
self.write_cmd(CMD_DISPON if state else CMD_DISPOFF)
self.power = state # ???
- Mon Jun 20, 2016 3:09 pm
- Forum: Drivers for External Components
- Topic: (WIP) Sitronix ST7735 TFT Display
- Replies: 31
- Views: 40824
Re: (WIP) Sitronix ST7735 TFT Display
Been trying to get the GHI N18 display running. https://www.ghielectronics.com/catalog/product/425 I think its the same controller st7735, but I am a bit confused as to wether I should use pyb.SPI or machine.SPI and neither contain the write command only send. Has the api changed sometime. Anyway no...