指间ESP触摸片与蜂鸣器操作

指间ESP按键操作 指间ESP开发板板载了五个触摸按键，分别对应2、14、27、33、32，该示例展示了如何读取触摸状态并反映在蜂鸣器上 import machine, display from machine import Pin, PWM tc0 = machine.TouchPad(Pin(32)) tc1 = machine.TouchPad(Pin(33)) tc2 = machine.TouchPad(Pin(27)) tc3 = machine.TouchPad(Pin(14)) tc4 = machine.TouchPad(Pin(2)) bkcolor = 0x333333 music = PWM(Pin(4)) music.duty(0) touchli = [False, False, False, False, False] notes = [523, 587, 659, 698, 784, 880] tft = display.TFT() tft.init(tft.ST7789) tft.clear() tft.rect(0, 0, 240, 240, bkcolor, bkcolor) def getTouch(): if tc0.read() < 100: touchli[0] = True else: touchli[0] = False if tc1.read() < 100: touchli[1] = True else: touchli[1] = False if tc2.read() < 100: touchli[2] = True else: touchli[2] = False touchli[2] = False if tc3.read() < 100: touchli[3] = True else: touchli[3] = False if tc4.read() < 100: touchli[4] = True else: touchli[4] = False while True: getTouch() for i in range(5): if touchli[i]: tft.rect(10 + 45 * i, 190, 40, 25, bkcolor, 0x00F0F0) music.duty(50) music.freq(notes[i]) else: tft.rect(10 + 45 * i, 190, 40, 25, bkcolor, 0xF0F000) if ( (not touchli[0]) and (not touchli[1]) and (not touchli[2]) and (not touchli[3]) and (not touchli[4]) ): music.duty(0) 该程序使用板载TFT屏幕画出两个圆角矩形用于标识状态，非按下时为青色，按下时为黄色。 程序详解：import为引用所需文件，包括display（屏幕驱动），Pin（IO口驱动）、蜂鸣器PWM驱动 import machine, display from machine import Pin, PWM 之后声明5个触摸按键 tc0 = machine.TouchPad(Pin(32)) tc1 = machine.TouchPad(Pin(33)) tc2 = machine.TouchPad(Pin(27)) tc3 = machine.TouchPad(Pin(14)) tc4 = machine.TouchPad(Pin(2)) 初始化TFT并使用背景色"bkcolor"填充屏幕 bkcolor = 0x333333 tft = display.TFT() tft.init(tft.ST7789) tft.clear() tft.rect(0, 0, 240, 240, bkcolor, bkcolor) 声明触摸状态数组与蜂鸣器音色数组 touchli = [False, False, False, False, False] notes = [523, 587, 659, 698, 784, 880] 编写gettouch函数，按下为true，否则为false def getTouch(): if tc0.read() < 100: touchli[0] = True else: touchli[0] = False if tc1.read() < 100: touchli[1] = True else: touchli[1] = False if tc2.read() < 100: touchli[2] = True else: touchli[2] = False touchli[2] = False if tc3.read() < 100: touchli[3] = True else: touchli[3] = False if tc4.read() < 100: touchli[4] = True else: touchli[4] = False 主程序中扫描触摸片，按下则绘制黄色矩形，否则绘制青色矩形。music.duty(50)为占空比，music.freq(notes[i])为音高 while True: getTouch() for i in range(5): if touchli[i]: tft.rect(10 + 45 * i, 190, 40, 25, bkcolor, 0x00F0F0) music.duty(50) music.freq(notes[i]) else: tft.rect(10 + 45 * i, 190, 40, 25, bkcolor, 0xF0F000) if ( (not touchli[0]) and (not touchli[1]) and (not touchli[2]) and (not touchli[3]) and (not touchli[4]) ): music.duty(0)

返回指间ESP开发板编程手册界面