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April 2, 2022 05:09
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M5StickV で UART 文字列受信サンプル。uart.any() で受信バッファの状態を確認して readline() で読むのが簡単。https://twitter.com/ksasao/status/1239058196334923776
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| import lcd | |
| import image | |
| import time | |
| import uos | |
| lcd.init() | |
| lcd.rotation(2) #Rotate the lcd 180deg | |
| from Maix import I2S, GPIO | |
| from Maix import GPIO | |
| from fpioa_manager import * | |
| from machine import UART | |
| # serial port setup | |
| # grove connector | |
| fm.register(35, fm.fpioa.UART2_TX, force=True) | |
| fm.register(34, fm.fpioa.UART2_RX, force=True) | |
| uart = UART(UART.UART2, 115200,8,0,0, timeout=1000, read_buf_len= 4096) | |
| # initialize camera | |
| import sensor | |
| while 1: | |
| try: | |
| sensor.reset() #Reset sensor may failed, let's try some times | |
| break | |
| except: | |
| err_counter = err_counter + 1 | |
| if err_counter == 20: | |
| lcd.draw_string(lcd.width()//2-100,lcd.height()//2-4, "Error: Sensor Init Failed", lcd.WHITE, lcd.RED) | |
| time.sleep(0.1) | |
| continue | |
| sensor.set_pixformat(sensor.RGB565) | |
| sensor.set_framesize(sensor.QVGA) #QVGA=320x240 | |
| sensor.run(1) | |
| # main | |
| text = "" | |
| try: | |
| while(True): | |
| if uart.any(): | |
| data = uart.readline() | |
| text = data.decode('utf-8') | |
| print(text) | |
| img = sensor.snapshot() # Take an image from sensor | |
| img.draw_string(40, 50, text, scale=3) | |
| lcd.display(img) | |
| except KeyboardInterrupt: | |
| a = kpu.deinit(task) | |
| sys.exit() |
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| #include <M5StickC.h> | |
| const int MAX_RX_BUFFER_SIZE = 1024; | |
| char rx_buffer[MAX_RX_BUFFER_SIZE]; | |
| void setup() { | |
| M5.begin(); | |
| M5.Lcd.setRotation(1); | |
| Serial2.begin(115200, SERIAL_8N1, 32, 33); | |
| } | |
| void loop() { | |
| M5.update(); | |
| if ( M5.BtnA.wasPressed() ) { | |
| println_ext("Button A"); | |
| } | |
| if ( M5.BtnB.wasPressed() ) { | |
| println_ext("Button B"); | |
| } | |
| int axpButton = M5.Axp.GetBtnPress(); | |
| if ( axpButton == 1 ) { | |
| println_ext("Axp Button (long)"); | |
| } | |
| if ( axpButton == 2 ) { | |
| println_ext("Axp Button (short)"); | |
| } | |
| } | |
| void println_ext(char* str){ | |
| Serial2.write(str); | |
| M5.Lcd.fillScreen(TFT_BLACK); | |
| M5.Lcd.setCursor(0, 5, 4); | |
| M5.Lcd.println(str); | |
| } |
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