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micropython urequests+max7219显示网络时间
#max7219.py from machine import Pin from micropython import const import framebuf _DIGIT_0 = const(0x1) _DECODE_MODE = const(0x9) _NO_DECODE = const(0x0) _INTENSITY = const(0xA) _INTENSITY_MIN = const(0x0) _SCAN_LIMIT = const(0xB) _DISPLAY_ALL_DIGITS = const(0x7) _SHUTDOWN = const(0xC) _SHUTDOWN_MODE = const(0x0) _NORMAL_OPERATION = const(0x1) _DISPLAY_TEST = const(0xF) _DISPLAY_TEST_NORMAL_OPERATION = const(0x0) _MATRIX_SIZE = const(8) class Max7219(framebuf.FrameBuffer): """ Driver for MAX7219 8x8 LED matrices Example for ESP8266 with 2x4 matrices (one on top, one on bottom), so we have a 32x16 display area: >>> from machine import Pin, SPI >>> from max7219 import Max7219 >>> spi = SPI(1, baudrate=10000000) >>> screen = Max7219(32, 16, spi, Pin(15)) >>> screen.rect(0, 0, 32, 16, 1) # Draws a frame >>> screen.text('Hi!', 4, 4, 1) >>> screen.show() On some matrices, the display is inverted (rotated 180°), in this case you can use `rotate_180=True` in the class constructor. """ def __init__(self, width, height, spi, cs, rotate_180=False): # Pins setup self.spi = spi self.cs = cs self.cs.init(Pin.OUT, True) # Dimensions self.width = width self.height = height # Guess matrices disposition self.cols = width // _MATRIX_SIZE self.rows = height // _MATRIX_SIZE self.nb_matrices = self.cols * self.rows self.rotate_180 = rotate_180 # 1 bit per pixel (on / off) -> 8 bytes per matrix self.buffer = bytearray(width * height // 8) format = framebuf.MONO_HLSB if not self.rotate_180 else framebuf.MONO_HMSB super().__init__(self.buffer, width, height, format) # Init display self.init_display() def _write_command(self, command, data): """Write command on SPI""" cmd = bytearray([command, data]) self.cs(0) for matrix in range(self.nb_matrices): self.spi.write(cmd) self.cs(1) def init_display(self): """Init hardware""" for command, data in ( (_SHUTDOWN, _SHUTDOWN_MODE), # Prevent flash during init (_DECODE_MODE, _NO_DECODE), (_DISPLAY_TEST, _DISPLAY_TEST_NORMAL_OPERATION), (_INTENSITY, _INTENSITY_MIN), (_SCAN_LIMIT, _DISPLAY_ALL_DIGITS), (_SHUTDOWN, _NORMAL_OPERATION), # Let's go ): self._write_command(command, data) self.fill(0) self.show() def brightness(self, value): """Set display brightness (0 to 15)""" if not 0 <= value < 16: raise ValueError("Brightness must be between 0 and 15") self._write_command(_INTENSITY, value) def show(self): """Update display""" # Write line per line on the matrices for line in range(8): self.cs(0) for matrix in range(self.nb_matrices): # Guess where the matrix is placed row, col = divmod(matrix, self.cols) # Compute where the data starts if not self.rotate_180: offset = row * 8 * self.cols index = col + line * self.cols + offset else: offset = 8 * self.cols - row * self.cols * 8 - 1 index = self.cols * (8 - line) - col + offset self.spi.write(bytearray([_DIGIT_0 + line, self.buffer[index]])) self.cs(1)
#url https://github.com/vrialland/micropython-max7219 from machine import Pin, SPI import max7219 import network#导入网络模块 import urequests import ujson def connect_wifi():#连接程序 #并将网络凭据(ssid和密码)存储在两个变量上。 ssid = "maker" password = "qazwsx12" try: #获取站点WiFi接口的实例并将其存储在变量上 wlan = network.WLAN(network.STA_IF) wlan.active(True) if not wlan.isconnected(): print('Connecting to network...') wlan.connect(ssid, password) while not wlan.isconnected(): time.sleep(1) print('Network connected:', wlan.ifconfig()) except: print('--') pass import time connect_wifi() spi = SPI(1, baudrate=10000000) screen = max7219.Max7219(32, 8, spi, Pin(15)) screen.brightness(7) #设置灯泡的高度 ''' response = urequests.get('http://quan.suning.com/getSysTime.do') data = ujson.loads(response.text) print(data['sysTime2']) ''' while True: screen.fill(0) response = urequests.get('http://quan.suning.com/getSysTime.do') data = ujson.loads(response.text) tt = data['sysTime2'].split(' ')[1].split(":")[0:2] screen.text(tt[0]+tt[1], 0, 0, 1) screen.show() time.sleep(2)
ESP32 MAX7219 5V VCC GND GND GPIO13 (HWSPI #1 MOSI) DIN GPIO14 (HWSPI #1 SCK) CLK GPIO15 CS gpio使用上图中浅蓝色标注的io口 # max7219测试程序 import max7219 from machine import Pin, SPI spi = SPI(1, baudrate=10000000) screen = max7219.Max7219(32, 8, spi, Pin(15)) screen.text('1234',0,0,1) screen.show()
来源 https://blog.csdn.net/zoudingrong/article/details/130830105
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