K210_MaixPy IDE peripheral development of six serial UART receiving and sending and receiving control LED

Development board: K210 AIRV R3 version widora

Development environment: MaixPy IDE silicon speed home

Required reference sites:

https://cn.maixpy.sipeed.com/zh/api_reference/Maix/fpioa.html

https://cn.maixpy.sipeed.com/zh/api_reference/Maix/gpio.html

https://cn.maixpy.sipeed.com/zh/api_reference/machine/uart.html

 

New file _5uart.py

The code uses the timer TIM in the previous section to modify it

Call the serial port, and call the GPIO management

from machine import UART
from fpioa_manager import fm

Look at the schematic

WIFI serial port corresponds to IO6 and IO7

Refer to the above code modification

fm.register(6,fm.fpioa.UART2_TX)
fm.register(7,fm.fpioa.UART2_RX)

uart_wifi = UART(UART.UART2, 115200, 8, None, 1, timeout=1000, read_buf_len=4096)

uart: UART.UART2 #Use serial port 2

Baud rate is 115200, 8 is data bit, parity check, stop bit 1

tiimeout timeout acceptance time is 1000ms

Accept cache size is 4096

 

Send function

uart_wifi.write("AT\r\n")

Accept function

read_data = uart_wifi.read()

 

To realize the function:

K210 sends AT to computer

K210 accepts the command sent by the computer to K210, judges the accepted characters, turns on and off the LED light

 

code show as below

import utime
from Maix import FPIOA
from Maix import GPIO
from machine import UART
from fpioa_manager import fm

fpioa = FPIOA()
fpioa.set_function(17,fpioa.GPIOHS0)
fpioa.set_function(18,fpioa.GPIOHS1)

led1 = GPIO(GPIO.GPIOHS0,GPIO.OUT)
led2 = GPIO(GPIO.GPIOHS1,GPIO.OUT)

led1.value(0)
led2.value(0)

fm.register(6,fm.fpioa.UART2_TX)
fm.register(7,fm.fpioa.UART2_RX)


uart_wifi = UART(UART.UART2, 115200, 8, None, 1,
            timeout=1000, read_buf_len=4096)

uart_wifi.write("AT\r\n")
while(1):
    read_data = uart_wifi.read()
    if(read_data != None):
        print(read_data)

    if(read_data == b'A'):
        led1.value(1)
    elif (read_data ==b'a'):
        led1.value(0)

After typing the code, connect to the development board and click to run

 

 

phenomenon:

 

 

Open the serial port assistant, select the port of WIFI (my side is COM3, and COM4 is the serial port of K210, I will not move him)

Click Run on MAIXPY IDE, it will send the AT character to COM3 (if not sent, cancel the operation again and run again)

 

 

In the serial port assistant, send a string, K210 will receive all

 

Send A, you can see the LED of K210 will light up

Sending other characters will not affect the LED light

When sending a, the LED light will be extinguished