To install PyQt5 on Raspberry Pi OS, for Python3, enter the command:
$ sudo apt install python3-pyqt5
Currently, it's 5.11.3.
Thursday, July 15, 2021
Raspberry Pi: change screen orientation
To rotate screen in Raspberry Pi OS:
Tested on 4 inch HDMI IPS Touch Display. Without installing custom driver, the screen will be in vertical (portrait).
Click on MENU -> Preferences -> Screen Configuration
RIGHT Click on the monitor > Orientation -> Select direction
Tested on 4 inch HDMI IPS Touch Display. Without installing custom driver, the screen will be in vertical (portrait).
Tuesday, July 13, 2021
Install bluepy on Raspberry Pi, for Python3, and examples.
bluepy
is a Python interface to Bluetooth LE on Linux.
To install
bluepy on Raspberry Pi for Python3, enter the command:
$ sudo apt-get install python3-pip libglib2.0-dev
$ sudo pip3 install bluepy
ref:
bluepy examples:
There are two examples in bluepy, scanner and notification. Here how I modify
it for Python3 working on Raspberry Pi, work with ESP32 BLE_uart example.
from bluepy.btle import Scanner, DefaultDelegate
class ScanDelegate(DefaultDelegate):
def __init__(self):
DefaultDelegate.__init__(self)
def handleDiscovery(self, dev, isNewDev, isNewData):
if isNewDev:
print("Discovered device", dev.addr)
elif isNewData:
print("Received new data from", dev.addr)
scanner = Scanner().withDelegate(ScanDelegate())
devices = scanner.scan(10.0)
for dev in devices:
print("Device %s (%s), RSSI=%d dB" % (dev.addr, dev.addrType, dev.rssi))
for (adtype, desc, value) in dev.getScanData():
print(" %s = %s" % (desc, value))
from bluepy import btle
class MyDelegate(btle.DefaultDelegate):
def __init__(self):
btle.DefaultDelegate.__init__(self)
# ... initialise here
def handleNotification(self, cHandle, data):
print("\n- handleNotification -\n")
print(data)
# ... perhaps check cHandle
# ... process 'data'
# Initialisation -------
p = btle.Peripheral("3c:71:bf:0d:dd:6a")
p.setDelegate( MyDelegate() )
# Setup to turn notifications on, e.g.
svc = p.getServiceByUUID("6E400001-B5A3-F393-E0A9-E50E24DCCA9E")
ch = svc.getCharacteristics("6E400003-B5A3-F393-E0A9-E50E24DCCA9E")[0]
# ch.write( setup_data )
setup_data = b"\x01\00"
p.writeCharacteristic(ch.valHandle+1, setup_data)
# Main loop --------
while True:
if p.waitForNotifications(1.0):
# handleNotification() was called
continue
print("Waiting...")
# Perhaps do something else here
Next:
Monday, July 12, 2021
RPi Pico (Arduino framework) + 128x160 ST7735 SPI TFT, using TFT_eSPI library.
With Arduino Mbed OS RP2040 Boards on Arduino IDE, this post show how to connect 128x160 ST7735 SPI TFT to Raspberry Pi Pico, and control with TFT_eSPI library in Arduino framework.
The TFT Display:
The TFT display used here is a 1.8 inch 128x160 ST7735 SPI TFT. The
product page is here: 1.8inch SPI Module ST7735S SKU:MSP1803.
Connection between Raspberry Pi Pico and 128x160 ST7735 SPI TFT:
The connection follow the default setup in TFT_eSPI library, Setup60_RP2040_ILI9341.h.
ST7735 TFT Pico
Pin# name
1 VCC 5V/3.3V 3V3 (pin 36)
2 GND Ground GND (pin 38)
3 CS chip select 20 (pin 26)
4 RESET reset 19 (pin 25)
5 A0 reg/data 18 (pin 24)
6 SDA SPI data 3 (pin 5)
7 SCK SPI clock 2 (pin 4)
8 LED Backlight 3V3
The library used is
Bodmer/TFT_eSPI, a Arduino and PlatformIO IDE compatible TFT library optimised for the
Raspberry Pi Pico (RP2040), STM32, ESP8266 and ESP32 that supports different
driver chips.
To install TFT_eSPI in Arduino IDE, simple open Library Manager, search and
install TFT_eSPI by Bodmer.
Take a note on the Tips section in the TFT_eSPI Library page:
If you load a new copy of TFT_eSPI then it will overwrite your setups if they are kept within the TFT_eSPI folder. One way around this is to create a new folder in your Arduino library folder called "TFT_eSPI_Setups". You then place your custom setup.h files in there. After an upgrade simply edit the User_Setup_Select.h file to point to your custom setup file.
If you load a new copy of TFT_eSPI then it will overwrite your setups if they are kept within the TFT_eSPI folder. One way around this is to create a new folder in your Arduino library folder called "TFT_eSPI_Setups". You then place your custom setup.h files in there. After an upgrade simply edit the User_Setup_Select.h file to point to your custom setup file.
Here is how I practice it:
- create a new folder in your Arduino library folder called
"TFT_eSPI_Setups".
- copy TFT_eSPI/User_Setups/Setup60_RP2040_ILI9341.h to new created
"TFT_eSPI_Setups" folder, rename as Setup60_RP2040_ST7735.h.
- Edit Setup60_RP2040_ST7735.h for ST7735:
// USER DEFINED SETTINGS
// Set driver type, fonts to be loaded, pins used and SPI control method etc
//
// See the User_Setup_Select.h file if you wish to be able to define multiple
// setups and then easily select which setup file is used by the compiler.
//
// If this file is edited correctly then all the library example sketches should
// run without the need to make any more changes for a particular hardware setup!
// Note that some sketches are designed for a particular TFT pixel width/height
// ##################################################################################
//
// Section 1. Call up the right driver file and any options for it
//
// ##################################################################################
// Tell the library to use 8 bit parallel mode (otherwise SPI is assumed)
//#define TFT_PARALLEL_8_BIT
// Display type - only define if RPi display
#define RPI_DISPLAY_TYPE // 20MHz maximum SPI
// Only define one driver, the other ones must be commented out
//#define ILI9341_DRIVER
#define ST7735_DRIVER // Define additional parameters below for this display
//#define ILI9163_DRIVER // Define additional parameters below for this display
//#define S6D02A1_DRIVER
//#define RPI_ILI9486_DRIVER // 20MHz maximum SPI
//#define HX8357D_DRIVER
//#define ILI9481_DRIVER
//#define ILI9486_DRIVER
//#define ILI9488_DRIVER // WARNING: Do not connect ILI9488 display SDO to MISO if other devices share the SPI bus (TFT SDO does NOT tristate when CS is high)
//#define ST7789_DRIVER // Full configuration option, define additional parameters below for this display
//#define ST7789_2_DRIVER // Minimal configuration option, define additional parameters below for this display
//#define R61581_DRIVER
//#define RM68140_DRIVER
//#define ST7796_DRIVER
//#define SSD1963_480_DRIVER
//#define SSD1963_800_DRIVER
//#define SSD1963_800ALT_DRIVER
//#define ILI9225_DRIVER
// Some displays support SPI reads via the MISO pin, other displays have a single
// bi-directional SDA pin and the library will try to read this via the MOSI line.
// To use the SDA line for reading data from the TFT uncomment the following line:
// #define TFT_SDA_READ // This option is for ESP32 ONLY, tested with ST7789 display only
// For ST7735, ST7789 and ILI9341 ONLY, define the colour order IF the blue and red are swapped on your display
// Try ONE option at a time to find the correct colour order for your display
#define TFT_RGB_ORDER TFT_RGB // Colour order Red-Green-Blue
// #define TFT_RGB_ORDER TFT_BGR // Colour order Blue-Green-Red
// For ST7789, ST7735 and ILI9163 ONLY, define the pixel width and height in portrait orientation
// #define TFT_WIDTH 80
#define TFT_WIDTH 128
// #define TFT_WIDTH 240 // ST7789 240 x 240 and 240 x 320
#define TFT_HEIGHT 160
// #define TFT_HEIGHT 128
// #define TFT_HEIGHT 240 // ST7789 240 x 240
// #define TFT_HEIGHT 320 // ST7789 240 x 320
// For ST7735 ONLY, define the type of display, originally this was based on the
// colour of the tab on the screen protector film but this is not always true, so try
// out the different options below if the screen does not display graphics correctly,
// e.g. colours wrong, mirror images, or tray pixels at the edges.
// Comment out ALL BUT ONE of these options for a ST7735 display driver, save this
// this User_Setup file, then rebuild and upload the sketch to the board again:
//#define ST7735_INITB
#define ST7735_GREENTAB
// #define ST7735_GREENTAB2
// #define ST7735_GREENTAB3
// #define ST7735_GREENTAB128 // For 128 x 128 display
// #define ST7735_GREENTAB160x80 // For 160 x 80 display (BGR, inverted, 26 offset)
// #define ST7735_REDTAB
// #define ST7735_BLACKTAB
// #define ST7735_REDTAB160x80 // For 160 x 80 display with 24 pixel offset
// If colours are inverted (white shows as black) then uncomment one of the next
// 2 lines try both options, one of the options should correct the inversion.
// #define TFT_INVERSION_ON
// #define TFT_INVERSION_OFF
// ##################################################################################
//
// Section 2. Define the pins that are used to interface with the display here
//
// ##################################################################################
// If a backlight control signal is available then define the TFT_BL pin in Section 2
// below. The backlight will be turned ON when tft.begin() is called, but the library
// needs to know if the LEDs are ON with the pin HIGH or LOW. If the LEDs are to be
// driven with a PWM signal or turned OFF/ON then this must be handled by the user
// sketch. e.g. with digitalWrite(TFT_BL, LOW);
// #define TFT_BL 32 // LED back-light control pin
// #define TFT_BACKLIGHT_ON HIGH // Level to turn ON back-light (HIGH or LOW)
// We must use hardware SPI, a minimum of 3 GPIO pins is needed.
// Typical setup for the RP2040 is :
//
// Display SDO/MISO to RP2040 pin D0 (or leave disconnected if not reading TFT)
// Display LED to RP2040 pin 3V3 or 5V
// Display SCK to RP2040 pin D2
// Display SDI/MOSI to RP2040 pin D3
// Display DC (RS/AO)to RP2040 pin D18 (can use another pin if desired)
// Display RESET to RP2040 pin D19 (can use another pin if desired)
// Display CS to RP2040 pin D20 (can use another pin if desired, or GND, see below)
// Display GND to RP2040 pin GND (0V)
// Display VCC to RP2040 5V or 3.3V (5v if display has a 5V to 3.3V regulator fitted)
//
// The DC (Data Command) pin may be labelled AO or RS (Register Select)
//
// With some displays such as the ILI9341 the TFT CS pin can be connected to GND if no more
// SPI devices (e.g. an SD Card) are connected, in this case comment out the #define TFT_CS
// line below so it is NOT defined. Other displays such at the ST7735 require the TFT CS pin
// to be toggled during setup, so in these cases the TFT_CS line must be defined and connected.
// For the Pico use these #define lines
#define TFT_MISO 0
#define TFT_MOSI 3
#define TFT_SCLK 2
#define TFT_CS 20 // Chip select control pin
#define TFT_DC 18 // Data Command control pin
#define TFT_RST 19 // Reset pin (could connect to Arduino RESET pin)
//#define TFT_BL // LED back-light
//#define TOUCH_CS 21 // Chip select pin (T_CS) of touch screen
// ##################################################################################
//
// Section 3. Define the fonts that are to be used here
//
// ##################################################################################
// Comment out the #defines below with // to stop that font being loaded
// The ESP8366 and ESP32 have plenty of memory so commenting out fonts is not
// normally necessary. If all fonts are loaded the extra FLASH space required is
// about 17Kbytes. To save FLASH space only enable the fonts you need!
#define LOAD_GLCD // Font 1. Original Adafruit 8 pixel font needs ~1820 bytes in FLASH
#define LOAD_FONT2 // Font 2. Small 16 pixel high font, needs ~3534 bytes in FLASH, 96 characters
#define LOAD_FONT4 // Font 4. Medium 26 pixel high font, needs ~5848 bytes in FLASH, 96 characters
#define LOAD_FONT6 // Font 6. Large 48 pixel font, needs ~2666 bytes in FLASH, only characters 1234567890:-.apm
#define LOAD_FONT7 // Font 7. 7 segment 48 pixel font, needs ~2438 bytes in FLASH, only characters 1234567890:-.
#define LOAD_FONT8 // Font 8. Large 75 pixel font needs ~3256 bytes in FLASH, only characters 1234567890:-.
//#define LOAD_FONT8N // Font 8. Alternative to Font 8 above, slightly narrower, so 3 digits fit a 160 pixel TFT
#define LOAD_GFXFF // FreeFonts. Include access to the 48 Adafruit_GFX free fonts FF1 to FF48 and custom fonts
// Comment out the #define below to stop the SPIFFS filing system and smooth font code being loaded
// this will save ~20kbytes of FLASH
#define SMOOTH_FONT
// ##################################################################################
//
// Section 4. Other options
//
// ##################################################################################
// Define the SPI clock frequency, this affects the graphics rendering speed. Too
// fast and the TFT driver will not keep up and display corruption appears.
// With an ILI9341 display 40MHz works OK, 80MHz sometimes fails
// With a ST7735 display more than 27MHz may not work (spurious pixels and lines)
// With an ILI9163 display 27 MHz works OK.
// #define SPI_FREQUENCY 1000000
// #define SPI_FREQUENCY 5000000
// #define SPI_FREQUENCY 10000000
// #define SPI_FREQUENCY 20000000
// #define SPI_FREQUENCY 32000000
#define SPI_FREQUENCY 70000000
// Optional reduced SPI frequency for reading TFT
#define SPI_READ_FREQUENCY 20000000
// The XPT2046 requires a lower SPI clock rate of 2.5MHz so we define that here:
#define SPI_TOUCH_FREQUENCY 2500000
- Edit the User_Setup_Select.h file to point to the custom setup file,
Setup60_RP2040_ST7735.h.
//#include <User_Setup.h> // Default setup is root library folder
#include <../TFT_eSPI_Setups/Setup60_RP2040_ST7735.h>
After then, you can try examples installed with TFT_eSPI, or your own
exercises.
My exercise: Pico_ST7735_SPI_128x160_.ino
/*
* Test 128x160 ST7735 SPI TFT Display,
* using TFT_eSPI library
*/
#include <TFT_eSPI.h>
#include <SPI.h>
TFT_eSPI tft = TFT_eSPI();
void setup() {
tft.init();
tft.setRotation(0);
tft.setTextSize(1);
}
void loop() {
tft.setRotation(0);
tft.fillScreen(TFT_BLACK);
tft.drawPixel(10, 10, TFT_WHITE);
tft.drawPixel(10, 150, TFT_WHITE);
tft.drawPixel(118, 150, TFT_WHITE);
tft.drawPixel(118, 10, TFT_WHITE);
delay(1000);
int margin = 10;
for(int x=margin; x<=TFT_WIDTH-margin; x++){
tft.drawPixel(x, margin, TFT_WHITE);
delay(10);
}
for(int y=margin; y<=TFT_HEIGHT-margin; y++){
tft.drawPixel(TFT_WIDTH-margin, y, TFT_WHITE);
delay(10);
}
for(int x=TFT_WIDTH-margin; x>=margin; x--){
tft.drawPixel(x, TFT_HEIGHT-margin, TFT_WHITE);
delay(10);
}
for(int y=TFT_HEIGHT-margin; y>=margin; y--){
tft.drawPixel(margin, y, TFT_WHITE);
delay(10);
}
delay(500);
tft.setRotation(1);
//tft.fillScreen(TFT_BLACK);
tft.setTextColor(TFT_RED, TFT_BLACK);
tft.drawString("RED", 10, 10, 4);
delay(1000);
tft.setRotation(2);
//tft.fillScreen(TFT_BLACK);
tft.setTextColor(TFT_GREEN, TFT_BLACK);
tft.drawString("GREEN", 10, 10, 4);
delay(1000);
tft.setRotation(3);
//tft.fillScreen(TFT_BLACK);
tft.setTextColor(TFT_BLUE, TFT_BLACK);
tft.drawString("BLUE", 10, 10, 4);
delay(1000);
delay(3000);
}
Install Arduino Mbed OS RP2040 Boards on Arduino IDE, to program Raspberry Pi Pico in Arduino framework.
With ArduinoCore-mbed Release 2.0.0, Arduino now support Raspberry Pi Pico officially. To program Raspberry Pi Pico in Arduino framework, install Arduino Mbed OS RP2040 Boards in Arduino IDE's Library Manager.
Tuesday, July 6, 2021
CircuitPython/Raspberry Pi Pico Exercise: get sys info
cpyPico_info.py run on Raspberry Pi Pico/CircuitPython to get system info.
import sys
import os
import microcontroller
print("\nCircuitPython/Raspberry Pi Pico Exercise: get sys info\n")
print('read sys.implementation :-')
print("sys.implementation.name:\t", sys.implementation.name)
print("sys.implementation.version:\t", sys.implementation.version)
print()
# Check if it's 32/64 bits
# ref:
# https://circuitpython.readthedocs.io/en/latest/docs/library/sys.html#sys.maxsize
bits = 0
v = sys.maxsize
while v:
bits += 1
v >>= 1
if bits > 32:
print("It's 64-bit (or more) platform")
else:
print("It's 32-bit (or less) platform")
print('\n======')
print('os.uname() :-')
u = os.uname()
print("type: ", type(u))
print(dir(u))
print(u)
print("sysname:\t", u.sysname)
print("nodename:\t", u.nodename)
print("release:\t", u.release)
print("version:\t", u.version)
print("machine:\t", u.machine)
print('\n======')
print()
print('microcontroller.cpus :-')
numOfCpu = len(microcontroller.cpus)
print('Number of CPU: ', numOfCpu)
for i in range(numOfCpu):
print('CPU[', i, ']:')
print('\tfrequency:\t', microcontroller.cpus[i].frequency)
print('\ttemperature:\t', microcontroller.cpus[i].temperature)
print('\tvoltage:\t', microcontroller.cpus[i].voltage)
print('\n======')
~ more exercises for RPi Pico/CircuitPython
Subscribe to:
Posts (Atom)