Preface

Want to use STM32 Give to through a serial port K210 Sending data , And show on the screen , Read several blogs , It's finally worked out , You can have a look if you are interested .
K210 Learning notes ( One ) K210 And STM32 Serial communication related
connection ,STM32 The serial port pin of is relatively fixed , and K210 It's like a cow , Arbitrary mapping , Good news for the lazy . Here I found two that have not been reused IO,IO9 and IO10

One 、STM32 End

I use punctual atoms STM32F103ZET6 Elite board
This serial port routine needless to say , Almost all routines are self-contained serial ports 1, Don't talk much , After the main function is initialized, it can be used directly printf Print

printf("%.2f",temp_wendu);// Print 

Two 、K210

k210 The end is simpler , Than 32 It's simple . It's using microPython, Grammar is Python.
After introducing the corresponding module , To initialize . One of the most important is codec ,32 The serial port over there sends byte data , In order to UTF-8 Coded , therefore K210 The end needs to be UTF-8 Decoding can display normally .

import sensor
import image
import lcd
import time
import utime
from machine import UART
from fpioa_manager import fm
fm.register(10, fm.fpioa.UART1_TX, force=True)# Mapping serial port pin 
fm.register(9, fm.fpioa.UART1_RX, force=True)# Mapping serial port pin 
uart = UART(UART.UART1, 115200, 8, 1, 0, timeout=1000, read_buf_len=4096)
clock = time.clock()
lcd.init()
sensor.reset()
sensor.set_pixformat(sensor.RGB565)
sensor.set_framesize(sensor.QVGA)
sensor.run(1)
sensor.skip_frames(30)# Skip just started 30 Frame photo 
lcd.rotation(2)#LCD Screen flip , The scope is 0~3
sensor.set_hmirror(True)# Camera image 

while True:
    img = sensor.snapshot()# Get a picture from the camera 
    read_data = uart.read(5)# Read serial data , Read 5 Bytes 
    read_data=read_data.decode('utf-8')# Conduct utf-8 decode 
    if uart.read()!=None:
        img.draw_string(2,2, ("temp=%s" %(read_data)), color=(0, 176, 80), scale=2)
    lcd.display(img)

test result

Now we can see , Successfully received serial port data , And in LCD Displayed on the . from K210 Send out STM32 It's the same . Add one \r\n That's it . Next time we can talk about .