kopia lustrzana https://github.com/peterhinch/micropython-nano-gui
ST7789 TTGO first release.
Peter Hinch
rodzic
d1373248ae
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0539c3a8f6
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DRIVERS.md
18
DRIVERS.md
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@ -390,8 +390,8 @@ below. An example file for the Pi Pico is in `color_setup/ssd7789.py`.
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#### ST7789 Constructor args:
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* `spi` An initialised SPI bus instance. The chip supports clock rates of upto
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62.5MHz (datasheet table 6). I have tested 60MHz. High speeds may be sensitive
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to electrical issues such as lead lengths, PCB layout and grounding.
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62.5MHz (datasheet table 6). I have tested 60MHz. High speeds are sensitive to
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electrical issues such as lead lengths, PCB layout and grounding.
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* `cs` An initialised output pin. Initial value should be 1.
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* `dc` An initialised output pin. Initial value should be 0.
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* `rst` An initialised output pin. Initial value should be 1.
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@ -424,11 +424,12 @@ def spi_init(spi):
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```
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#### Display mode
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This is povided in the hope of supporting other displays which may not be
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symmetrical. It also enables the Adafruit display image to be rotated.
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This is provided mainly to support asymmetrical displays. It also enables the
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Adafruit display image to be rotated.
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The driver exports the following constants:
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```python
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LANDSCAPE = 0 # Normal display
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PORTRAIT = 0x20 # Rotate 90°
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REFLECT = 0x40 # Swap pixels left-right
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USD = 0x80 # Upside down: swap pixels top-bottom
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@ -474,6 +475,9 @@ option may be to overclock.
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### 3.3.1 TTGO T Display
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Thanks to [Ihor Nehrutsa](https://github.com/IhorNehrutsa) who wrote much of
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the setup file for this device.
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This is an ESP32 based device with an integrated 1.14" 135x240 pixel display
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based on ST7789.
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@ -481,6 +485,12 @@ It is supported by `color_setup_ttgo.py` in `drivers/st7789`. Copy to
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`/pyboard/color_setup.py` on the device. It produces a landscape mode display
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with the top left hand corner adjacent to pin 36.
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Commented-out code offers portrait mode with variants for upside-down and
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reflected display modes. These differ from those for the Adafruit display. This
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is because the display hardware is designed in portrait mode. The color setup
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file transposes the `PORTRAIT` and `LANDSCAPE` constants with consequent
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changes to the effect of the `USD` and `REFLECT` constants.
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###### [Contents](./DRIVERS.md#contents)
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# 4. Drivers for sharp displays
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@ -33,7 +33,7 @@ pcs = Pin(14, Pin.OUT, value=1)
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prst = Pin(15, Pin.OUT, value=1)
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gc.collect() # Precaution before instantiating framebuf
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# Conservative low baudrate. Can go to 62.5MHz.
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# Conservative low baudrate. Can go to 62.5MHz. Depending on wiring.
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spi = SPI(1, 30_000_000, sck=Pin(10), mosi=Pin(11), miso=Pin(8))
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ssd = SSD(spi, dc=pdc, cs=pcs, rst=prst) #, disp_mode=PORTRAIT | USD)
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@ -6,7 +6,7 @@
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# Notes: Peter Hinch April 2021
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# UNDER DEVELOPMENT. This file and the ST7789 driver may change.
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# These settings produce a landscape mode display with top left
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# adjactent to pin 36.
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# adjacent to pin 36.
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# Supports:
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# TTGO T-Display 1.14" 135*240(Pixel) based on ST7789V
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@ -46,7 +46,7 @@ BUTTON2 = 0 # left of the USB connector
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from machine import Pin, SPI, ADC
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import gc
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from drivers.st7789.st7789_4bit import ST7789 as SSD, PORTRAIT, USD, REFLECT
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from drivers.st7789.st7789_4bit import ST7789 as SSD, PORTRAIT, USD, REFLECT, LANDSCAPE
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pdc = Pin(TFT_DC, Pin.OUT, value=0) # Arbitrary pins
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pcs = Pin(TFT_CS, Pin.OUT, value=1)
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@ -56,8 +56,29 @@ pbl = Pin(TFT_BL, Pin.OUT, value=1)
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gc.collect() # Precaution before instantiating framebuf
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# Conservative low baudrate. Can go to 62.5MHz.
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spi = SPI(1, 30_000_000, sck=Pin(TFT_SCLK), mosi=Pin(TFT_MOSI))
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# Tweaks for TTGO
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OFFSET = (52, 40)
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PORTRAIT, LANDSCAPE = LANDSCAPE, PORTRAIT # Hardware is portrait mode
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# Landscape configs.
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# Right way up landscape: defined as top left adjacent to pin 36
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# Normal display
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ssd = SSD(spi, height=135, width=240, dc=pdc, cs=pcs, rst=prst, disp_mode=LANDSCAPE | REFLECT, offset=OFFSET)
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# Reflected (mirror image)
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# ssd = SSD(spi, height=135, width=240, dc=pdc, cs=pcs, rst=prst, disp_mode=LANDSCAPE | USD | REFLECT, offset=OFFSET)
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# Upside down (USD) landscape top left close to pin 12
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# ssd = SSD(spi, height=135, width=240, dc=pdc, cs=pcs, rst=prst, disp_mode=LANDSCAPE | USD, offset=OFFSET)
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# USD Reflected (mirror image)
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# ssd = SSD(spi, height=135, width=240, dc=pdc, cs=pcs, rst=prst, disp_mode=LANDSCAPE, offset=OFFSET)
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ssd = SSD(spi, height=135, width=240, dc=pdc, cs=pcs, rst=prst, disp_mode=PORTRAIT | REFLECT, offset=(40, 52))
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# Portrait configs.
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# Normal portrait display
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# ssd = SSD(spi, height=240, width=135, dc=pdc, cs=pcs, rst=prst, disp_mode=PORTRAIT, offset=OFFSET)
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# Normal Reflected
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# ssd = SSD(spi, height=240, width=135, dc=pdc, cs=pcs, rst=prst, disp_mode=PORTRAIT | REFLECT, offset=OFFSET)
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# USD
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# ssd = SSD(spi, height=240, width=135, dc=pdc, cs=pcs, rst=prst, disp_mode=PORTRAIT | USD | REFLECT, offset=OFFSET)
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# USD Reflected
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# ssd = SSD(spi, height=240, width=135, dc=pdc, cs=pcs, rst=prst, disp_mode=PORTRAIT | USD, offset=OFFSET)
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# optional
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# b1 = Pin(BUTTON1, Pin.IN)
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@ -67,7 +67,8 @@ class ST7789(framebuf.FrameBuffer):
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self._lock = asyncio.Lock()
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mode = framebuf.GS4_HMSB # Use 4bit greyscale.
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gc.collect()
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buf = bytearray(height * width // 2)
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#buf = bytearray(height * width // 2)
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buf = bytearray(height * -(-width // 2)) # Ceiling division for odd widths
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self._mvb = memoryview(buf)
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super().__init__(buf, width, height, mode)
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self._linebuf = bytearray(self.width * 2) # 16 bit color out
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@ -130,19 +131,18 @@ class ST7789(framebuf.FrameBuffer):
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wcd(b'\x36', int.to_bytes(disp_mode, 1, 'little'))
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cmd(b'\x29') # DISPON. Adafruit then delay 500ms.
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# Define the mapping between RAM and the display
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# May need modifying for non-Adafruit hardware which may use a different
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# mapping between chip RAM and LCD. Datasheet section 8.12 p124.
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# Define the mapping between RAM and the display.
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# Datasheet section 8.12 p124.
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def set_window(self, mode):
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rht = 320
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rwd = 240 # RAM ht and width
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wht = self.height
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wwd = self.width # Window dimensions
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# Determine x and y start and end. Defaults for LANDSCAPE and PORTRAIT
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xoff = self._offset[0]
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wht = self.height # Window (framebuf) dimensions.
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wwd = self.width # In portrait mode wht > wwd
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if mode & PORTRAIT:
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xoff = self._offset[1] # x and y transposed
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yoff = self._offset[0]
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xs = xoff
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xe = wwd + xoff - 1
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yoff = self._offset[1]
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ys = yoff # y start
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ye = wht + yoff - 1 # y end
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if mode & REFLECT:
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@ -151,7 +151,21 @@ class ST7789(framebuf.FrameBuffer):
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if mode & USD:
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xs = rht - wwd - xoff
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xe = rht - xoff - 1
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# Col address set. Add in any offset.
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else: # LANDSCAPE
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xoff = self._offset[0]
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yoff = self._offset[1]
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xs = xoff
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xe = wwd + xoff - 1
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ys = yoff # y start
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ye = wht + yoff - 1 # y end
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if mode & USD:
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ys = rht - wht - yoff
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ye = rht - yoff - 1
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if mode & REFLECT:
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xs = rwd - wwd - xoff
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xe = rwd - xoff - 1
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# Col address set.
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self._wcd(b'\x2a', int.to_bytes(xs, 2, 'big') + int.to_bytes(xe, 2, 'big'))
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# Row address set
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self._wcd(b'\x2b', int.to_bytes(ys, 2, 'big') + int.to_bytes(ye, 2, 'big'))
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@ -160,7 +174,8 @@ class ST7789(framebuf.FrameBuffer):
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def show(self): # Blocks for 83ms @60MHz SPI
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#ts = ticks_us()
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clut = ST7789.lut
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wd = self.width // 2
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#wd = self.width // 2
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wd = -(-self.width // 2) # Ceiling division for odd number widths
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end = self.height * wd
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lb = self._linebuf
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buf = self._mvb
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@ -183,7 +198,8 @@ class ST7789(framebuf.FrameBuffer):
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if mod:
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raise ValueError('Invalid do_refresh arg.')
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clut = ST7789.lut
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wd = self.width // 2
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#wd = self.width // 2
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wd = -(-self.width // 2)
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lb = self._linebuf
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buf = self._mvb
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line = 0
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