examples/bflb/example.py.

Signed-off-by: 李昂 <liang6516@outlook.com>

examples/bflb/example.py

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+import machine
+import time
+import PikaStdDevice as std
+import bflb
+import lvgl as lv
+
+def led():
+    """
+    led 例程
+    led0、led1、led2 依次闪烁 10 次
+    led0 sipeed m0p 的板载 led
+    led1 是 verimake bl618 竞赛板的板载 led
+    """
+    led0 = machine.Led(0)
+    led1 = machine.Led(1)
+    for i in range(10):
+        print('Blinking (%d/10)' % (i + 1))
+        led0.on()
+        led1.off()
+        time.sleep(0.1)
+        led0.off()
+        led1.on()
+        time.sleep(0.1)
+        led0.off()
+        led1.off()
+    led0.off()
+    led1.off()
+    led0.close()
+    led1.close()
+
+
+def key():
+    """
+    key 例程
+    等待 key0 被按下 3 次, 使用阻塞方式
+    key0 是 verimake bl618 竞赛板的板载按键
+    如果不是竞赛板，可以自行连接 P33 引脚
+    """
+    key0 = machine.Key(0)
+    print('Waiting for key0 to be pressed')
+    count_expect = 3
+    count = 0
+    while True:
+        if key0.isPressed():
+            print('Key0 is pressed (%d/%d)' % (count + 1, count_expect))
+            count += 1
+            time.sleep(0.3)
+            if count == count_expect:
+                break
+        time.sleep(0.1)
+    key0.close()
+
+
+count = 0
+count_expect = 3
+
+
+def _handle_key0(siganl):
+    """
+    key 回调例程的回调函数
+    """
+    global count
+    print('Key0 is pressed (%d/%d)' % (count + 1, count_expect))
+    count += 1
+
+key_cb = None
+def key_callback():
+    """
+    key 回调例程
+    等待 key0 被按下 3 次, 使用回调方式
+    key0 是 verimake bl618 竞赛板的板载按键
+    如果不是竞赛板，可以自行连接 P33 引脚
+    """
+    global count, key_cb
+    count = 0
+    key_cb = machine.Key(0)
+    print('Waiting for key0 to be pressed')
+    key_cb.setCallBack(_handle_key0, std.GPIO.SIGNAL_FALLING)
+    while True:
+        if count > count_expect:
+            break
+        time.sleep(0.1)
+
+
+def adc():
+    """
+    adc 例程
+    读取 adc0 的值 10 次
+    adc 接在 P0 引脚
+    """
+    adc0 = machine.ADC()
+    adc0.setPin('P0')
+    adc0.enable()
+    for i in range(10):
+        print('ADC0: %f (%d/%d)' % (adc0.read(), i, 10))
+        time.sleep(0.5)
+
+
+def dac():
+    """
+    dac 例程
+    输出 0.5V 的方波 10 次
+    dac 接在 P3 引脚
+    adc 接在 P0 引脚, 实验时可以用杜邦线将 P3 和 P0 连接起来
+    """
+    dac0 = machine.DAC()
+    dac0.setPin('P3')
+    dac0.enable()
+    adc0 = machine.ADC()
+    adc0.setPin('P0')
+    adc0.enable()
+    val_max = 1.5
+    val_min = 1
+    for i in range(10):
+        dac0.write(val_max)
+        print('DAC0: %r, ADC0: %r (%d/%d)' % (val_max, adc0.read(), i+1, 10))
+        time.sleep(0.5)
+        dac0.write(val_min)
+        print('DAC0: %r, ADC0: %r (%d/%d)' % (val_min, adc0.read(), i+1, 10))
+        time.sleep(0.5)
+    dac0.disable()
+    adc0.disable()
+
+def uart():
+    """
+    uart 例程
+    通过 uart1 进行自发自收实验，你可以将 P23 和 P24 用杜邦线连接起来
+    """
+    uart1 = machine.UART()
+    uart1.setId(1)
+    uart1.setPinTX('P23')
+    uart1.setPinRX('P24')
+    uart1.setBaudRate(115200)
+    uart1.enable()
+    print('Waiting for data from uart1')
+    for i in range(10):
+        uart1.write('Hello!')
+        data = uart1.read(256)
+        time.sleep(0.1)
+        if data:
+            print('Received: %r' % data)
+        time.sleep(0.1)
+
+def _uart_receive_callback(signal):
+    """
+    UART 回调例程的回调函数
+    """
+    global uart_rx_cnt
+    data = uart1.read(256)
+    print('Received:', data, '(%d/%d)' % (uart_rx_cnt + 1, 3))
+    uart_rx_cnt += 1
+
+def uart_callback():
+    """
+    uart 回调例程
+    通过 uart1 与电脑通信, 使用回调方式接收数据
+    电脑需要连接到 uart1 的 TX 和 RX 引脚，波特率为 115200
+    例程开始后，你需要在电脑上输出三行数据
+    TX引脚是 P23
+    RX引脚是 P24
+    """
+    global uart1
+    global uart_rx_cnt
+    uart_rx_cnt = 0
+    uart1 = machine.UART()
+    uart1.setId(1)
+    uart1.setPinTX('P23')
+    uart1.setPinRX('P24')
+    uart1.setBaudRate(115200)
+    uart1.enable()
+    uart1.setCallBack(_uart_receive_callback, uart1.SIGNAL_RX)
+    print('Waiting for data from uart1 (0/3)')
+    while True:
+        if uart_rx_cnt == 3:
+            break
+        time.sleep(0.1)
+    uart1.disable()
+
+cam0:bflb.Camera = None
+canvas:lv.canvas = None
+
+def _cam_callback(signal):
+    """
+    Camera 回调例程的回调函数
+    """
+    global cam0, canvas
+    pic_addr, pic_size = cam0.get_frame_info()
+    # print('Picture address: 0x%08x' % pic_addr)
+    # print('Picture size: %d' % pic_size)
+    cam0.pop_one_frame()
+    LV_IMG_CF_TRUE_COLOR = 4
+    canvas.set_buffer(pic_addr, 320, 240, LV_IMG_CF_TRUE_COLOR)
+
+def cam():
+    global cam0, canvas
+
+    # lvgl
+    canvas = lv.canvas(lv.scr_act())
+    canvas.set_size(320, 240)
+    canvas.align(lv.ALIGN.TOP_MID, 0, 0)
+
+    # camera
+    cam0 = bflb.Camera()
+    cam0.set_callback(_cam_callback)
+    cam0.start()
+    return cam0
+
+mic0:bflb.Microphone = None
+chart:lv.chart = None
+
+def _mic_callback(signal):
+    # print('Mic data received')
+    chart.refresh()
+
+def mic():
+    global mic0, chart
+
+    # init mic
+    mic0 = bflb.Microphone()
+    mic0.set_callback(_mic_callback)
+
+    # init chart
+    chart = lv.chart(lv.scr_act())
+    chart.set_size(320, 240)
+    chart.set_range(0, 0, 2000)
+    LV_PART_INDICATOR = 0x020000
+    chart.set_style_size(0, LV_PART_INDICATOR)
+    ser = chart.add_series(lv.palette_main(lv.PALETTE.RED), 0)
+    addr, size = mic0.get_frame_info()
+    chart.set_point_count(size)
+    chart.set_ext_y_array(ser, addr)
+    print('Mic frame address: 0x%08x' % addr)
+    print('Mic frame size: %d' % size)
+
+    # start mic
+    mic0.start()
+    return mic0