Optimise for MPY v1.14

Author: mcauser

README.md

@@ -10,20 +10,27 @@ For example, the [Grove - OLED Display 1.12"](http://wiki.seeed.cc/Grove-OLED_Di
 
 Copy the file to your device, using ampy, webrepl or compiling and deploying. eg.
 
-```
+```bash
 $ ampy put ssd1327.py
 ```
 
 **Hello World**
 
 ```python
 import ssd1327
-from machine import I2C, Pin
+from machine import SoftI2C, Pin
+
+i2c = SoftI2C(sda=Pin(21), scl=Pin(22)) # TinyPICO
+# i2c = SoftI2C(sda=Pin(0), scl=Pin(1)) # Raspberry Pi Pico
+# i2c = SoftI2C(sda=Pin(4), scl=Pin(5)) # WeMos D1 Mini
 
-i2c = I2C(sda=Pin(4), scl=Pin(5))
-# display = ssd1327.SSD1327_I2C(96, 96, i2c, 60)
 display = ssd1327.SEEED_OLED_96X96(i2c)
+# display = ssd1327.SSD1327_I2C(128, 128, i2c) # WaveShare, Zio Qwiic
+
+display.text('Hello World', 0, 0, 255)
+display.show()
 
+display.fill(0)
 for y in range(0,12):
     display.text('Hello World', 0, y * 8, 15 - y)
 display.show()
@@ -33,12 +40,29 @@ See [ssd1327_examples.py](ssd1327_examples.py) for more.
 
 ## Parts
 
-* [WeMos D1 Mini](https://www.aliexpress.com/store/product/D1-mini-Mini-NodeMcu-4M-bytes-Lua-WIFI-Internet-of-Things-development-board-based-ESP8266/1331105_32529101036.html) $4.00 USD
-* [Grove OLED Display 1.12"](https://www.seeedstudio.com/Grove-OLED-Display-1.12%22-p-824.html) $14.90 USD
-* [Grove Male Jumper Cable](https://www.seeedstudio.com/Grove-4-pin-Male-Jumper-to-Grove-4-pin-Conversion-Cable-%285-PCs-per-Pack%29-p-1565.html) $2.90 USD
+* [Grove OLED Display 1.12"](https://www.seeedstudio.com/Grove-OLED-Display-1-12.html) $14.90 USD
+* [Zio Qwiic OLED Display (1.5inch, 128x128)](https://www.sparkfun.com/products/15890) $19.95 USD
+* [TinyPICO](https://www.tinypico.com/) $20.00 USD
+* [Raspberry Pi Pico](https://core-electronics.com.au/raspberry-pi-pico.html) $5.75 AUD
+* [WeMos D1 Mini](https://www.aliexpress.com/item/32529101036.html) $3.50 USD
+* [Grove Male Jumper Cable](https://www.seeedstudio.com/Grove-4-pin-Male-Jumper-to-Grove-4-pin-Conversion-Cable-5-PCs-per-Pack.html) $2.90 USD
 
 ## Connections
 
+TinyPICO ESP32 | Grove OLED
+-------------- | ----------
+GPIO22 (SCL)   | SCL
+GPIO21 (SDA)   | SDA
+3V3            | VCC
+GND            | GND
+
+Raspberry Pi Pico | Grove OLED
+----------------- | ----------
+GPIO1 (I2C0_SCL)  | SCL
+GPIO0 (I2C0_SDA)  | SDA
+3V3               | VCC
+GND               | GND
+
 WeMos D1 Mini | Grove OLED
 ------------- | ----------
 D1 (GPIO5)    | SCL
@@ -48,8 +72,10 @@ G             | GND
 
 ## Links
 
-* [WeMos D1 Mini](https://wiki.wemos.cc/products:d1:d1_mini)
+* [TinyPICO Getting Started](https://www.tinypico.com/gettingstarted)
+* [WeMos D1 Mini](https://www.wemos.cc/en/latest/d1/d1_mini.html)
 * [micropython.org](http://micropython.org)
+* [micropython docs](http://docs.micropython.org/en/latest/)
 * [Adafruit Ampy](https://learn.adafruit.com/micropython-basics-load-files-and-run-code/install-ampy)
 
 ## License

docs/demo.jpg

@@ -27,8 +27,6 @@
 from micropython import const
 import time
 import framebuf
-from uos import uname
-
 
 # commands
 SET_COL_ADDR          = const(0x15)
@@ -153,25 +151,17 @@ class SSD1327_I2C(SSD1327):
     def __init__(self, width, height, i2c, addr=0x3c, external_vcc=False):
         self.i2c = i2c
         self.addr = addr
-        self.temp = bytearray(2)
+        self.cmd_arr = bytearray([REG_CMD, 0])  # Co=1, D/C#=0
+        self.data_list = [bytes((REG_DATA,)), None]
         super().__init__(width, height, external_vcc)
 
     def write_cmd(self, cmd):
-        self.temp[0] = REG_CMD # Co=1, D/C#=0
-        self.temp[1] = cmd
-        self.i2c.writeto(self.addr, self.temp)
+        self.cmd_arr[1] = cmd
+        self.i2c.writeto(self.addr, self.cmd_arr)
 
     def write_data(self, buf):
-        self.temp[0] = self.addr << 1
-        self.temp[1] = REG_DATA # Co=0, D/C#=1
-        # check if board is Pi Pico as it doesn't support start, write and stop operations.
-        if uname()[0] == 'rp2':
-            self.i2c.writeto(self.addr, b'\x40' + buf)
-        else:
-            self.i2c.start()
-            self.i2c.write(self.temp)
-            self.i2c.write(buf)
-            self.i2c.stop()
+        self.data_list[1] = buf
+        self.i2c.writevto(self.addr, self.data_list)
 
 
 class SEEED_OLED_96X96(SSD1327_I2C):

ssd1327.py

@@ -41,12 +41,13 @@
 display.text('grey using',0,50,5)
 display.text('GS4_HMSB',0,60,15)
 display.text('MicroPython',0,70,5)
-display.text('v1.9 ESP8266',0,80,15)
+display.text('v1.14',0,80,15)
 display.show()
 
 
 # rotate 180 degrees
 display.rotate(True)
+display.show()
 
 # rotate 0 degrees
 display.write_cmd(0xA2)
@@ -78,13 +79,14 @@
 
 # rotate 0 degrees
 display.rotate(False)
-
+display.show()
 
 # scroll the framebuf down 16px
 display.fill(0)
 display.text('Hello World', 0, 0, 15)
 display.show()
 display.scroll(0,16)
+display.show()
 
 
 # corner pixels
@@ -97,6 +99,7 @@
 
 
 # random pixels (slow)
+# note: urandom not available on rpi pico
 import uos
 for i in range(0,256):
 	x = uos.urandom(1)[0] // 2