Merge branch 'master' of https://github.com/BPI-STEAM/BPI-BIT-MicroPython

Author: junhuanchen

02.inputs/uart.py

@@ -0,0 +1,12 @@
+import time
+from machine import UART
+
+uart = UART(2)  # UART(2) RX16 TX17
+uart.init(57600, bits=8, parity=None, stop=1)
+
+while True:
+    recvlen = uart.any()
+    if recvlen > 0:
+        buffer = uart.read(recvlen)
+        uart.write(buffer)
+        print(buffer)

07.sensors/cs5460a/cs5460a.py

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+from machine import Pin, SPI
+
+from micropython import const
+
+CS5460A_RMS_VOLTAGE = const(0x18)
+
+CS5460A_RMS_CURRENT = const(0x16)
+
+CS5460A_TRUE_POWER = const(0x14)
+
+CS5460A_CFG_READ = const(0x00)  # //reg read: config
+
+CS5460A_CFG_READ_IGN = const(0x04)  # //reg read: Ign
+
+CS5460A_CFG_READ_VGN = const(0x08)  # //reg read: Vgn
+
+CS5460A_CFG_READ_CYCLE = const(0x0a)  # //reg read: cycle count
+
+CS5460A_CFG_POWER_UP = const(0xa0)  # // power-up/halt
+
+CS5460A_CFG_GAIN = const(0x40)  # // reg write: config. PGA Gain 10x, IHPF=1, VHPF=1
+
+CS5460A_CFG_GAIN1 = const(0x01)
+
+CS5460A_CFG_GAIN2 = const(0x00)
+
+CS5460A_CFG_GAIN3 = const(0x61)
+
+CS5460A_CFG_IGN= const(0x44)  # // reg write: Ign [current chan gain].
+
+CS5460A_CFG_IGN1 = const(0x40)
+
+CS5460A_CFG_IGN2 = const(0x00)
+
+CS5460A_CFG_IGN3 = const(0x00)
+
+CS5460A_CFG_VGN = const(0x48)  # reg write: Vgn [voltage chan gain]
+
+CS5460A_CFG_VGN1 = const(0x41)
+
+CS5460A_CFG_VGN2 = const(0xA0)
+
+CS5460A_CFG_VGN3 = const(0xEA)
+
+CS5460A_START_CONV = const(0xe8) #command : start convert
+
+
+class cs5460a(object):
+    import utime
+    def __init__(self, spi, cs=2, rst=4):
+        self.spi = spi
+        self.cs = Pin(cs, Pin.OUT)
+        self.rst = Pin(rst, Pin.OUT)
+        self.FLOAT24 = 16777216.0  # 2^24
+        self.VOLTAGE_MULTIPLIER = (1 / self.FLOAT24 * 367)
+        self.CURRENT_MULTIPLIER = (1 / self.FLOAT24 * 11.66)
+        self.POWER_MULTIPLIER = (1 / self.FLOAT24 * 1.024 * 367 * 11.66 * 2)
+
+    def read(self, addr):
+        b = bytearray([0xfe, 0xfe, 0xfe])
+        buf = bytearray(3)
+        self.cs.value(0)
+        self.spi.write(bytearray([addr]))
+        self.spi.write_readinto(b, buf)
+        self.cs.value(1)
+        # print(buf[0],buf[1],buf[2])
+        return buf
+
+    def write(self, addr, data):
+        self.cs.value(0)
+        self.spi.write(bytearray([addr]))
+        self.spi.write(data)
+        self.cs.value(1)
+        # print('write_ok')
+
+    def cs5460a_setup(self):
+        self.rst.value(0)
+        utime.sleep_ms(50)
+        self.rst.value(1)  # reset the  cs5460a
+
+        self.cs.value(0)
+        self.spi.write(bytearray([CS5460A_CFG_POWER_UP]))
+        self.cs.value(1)  # the command of the power_up
+
+        self.write(CS5460A_CFG_GAIN, bytearray([CS5460A_CFG_GAIN1, CS5460A_CFG_GAIN2, CS5460A_CFG_GAIN3]))  # set
+        self.write(CS5460A_CFG_VGN , bytearray([CS5460A_CFG_VGN1, CS5460A_CFG_VGN2, CS5460A_CFG_VGN3]))#V
+        self.write(CS5460A_CFG_IGN, bytearray([CS5460A_CFG_IGN1, CS5460A_CFG_IGN2, CS5460A_CFG_IGN3]))#A
+
+        self.cs.value(0)
+        self.spi.write(bytearray([CS5460A_START_CONV]))
+        self.cs.value(1)  # start to convert
+
+    def _conv(self, true_power):
+        if true_power[0] > 0x80:
+            a = bytearray([~true_power[0]])
+            a[0] &= 0x7f
+            # print(a)
+            b = bytearray([~true_power[1]])
+            # print(b)
+            c = bytearray([~true_power[2]])
+            # print(c)
+            temp = ((c[0] + b[0] * 256 + a[0] * 65536) + 1)
+        else:
+            temp = ((true_power[0] + true_power[0] * 256 + true_power[0] * 65536) + 1)
+        return temp
+
+    def read_u(self):
+        voltage = self.read(CS5460A_RMS_VOLTAGE)
+        temp = (voltage[2] + voltage[1] * 256 + voltage[0] * 65536)
+        V = self.VOLTAGE_MULTIPLIER * temp
+        return V
+
+    def read_i(self):
+        current = self.read(CS5460A_RMS_CURRENT)
+        temp = (current[2] + current[1] * 256 + current[0] * 65536)
+        A = self.CURRENT_MULTIPLIER * temp
+        return A
+
+    def read_p(self):
+        true_power = self.read(CS5460A_TRUE_POWER)
+        temp = self._conv(true_power)
+        P = self.POWER_MULTIPLIER * temp
+        return P
+
+
+from machine import Pin
+import utime
+
+p = Pin(18, Pin.OUT)
+p.value(1)
+
+
+def unit_test():
+    vspi = SPI(-1, sck=Pin(5), mosi=Pin(23), miso=Pin(19), baudrate=2000000)  # -1 software spi
+    ts = cs5460a(vspi)
+    ts.cs5460a_setup()  # 初始化
+
+    while True:
+        utime.sleep_ms(1000)
+        k = ts.read(0x1e)
+        # print(k)
+        # current=ts.read(0x16)
+        # temp = (current[2] + current[1] * 256 + current[0] * 65536)/16777216
+        # print(temp)
+        V = ts.read_u()
+        A = ts.read_i()
+        P = ts.read_p()
+        print('current=%.2f A' % A)
+        print('voltage=%.2f V' % V)
+        print('ture_power=%.2f W' % P)
+
+
+if __name__ == '__main__':
+    unit_test()

07.sensors/ssd1306.py

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+# MicroPython SSD1306 OLED driver, I2C and SPI interfaces
+
+import time
+import framebuf
+
+
+# register definitions
+SET_CONTRAST        = const(0x81)
+SET_ENTIRE_ON       = const(0xa4)
+SET_NORM_INV        = const(0xa6)
+SET_DISP            = const(0xae)
+SET_MEM_ADDR        = const(0x20)
+SET_COL_ADDR        = const(0x21)
+SET_PAGE_ADDR       = const(0x22)
+SET_DISP_START_LINE = const(0x40)
+SET_SEG_REMAP       = const(0xa0)
+SET_MUX_RATIO       = const(0xa8)
+SET_COM_OUT_DIR     = const(0xc0)
+SET_DISP_OFFSET     = const(0xd3)
+SET_COM_PIN_CFG     = const(0xda)
+SET_DISP_CLK_DIV    = const(0xd5)
+SET_PRECHARGE       = const(0xd9)
+SET_VCOM_DESEL      = const(0xdb)
+SET_CHARGE_PUMP     = const(0x8d)
+
+
+class SSD1306:
+    def __init__(self, width, height, external_vcc):
+        self.width = width
+        self.height = height
+        self.external_vcc = external_vcc
+        self.pages = self.height // 8
+        # Note the subclass must initialize self.framebuf to a framebuffer.
+        # This is necessary because the underlying data buffer is different
+        # between I2C and SPI implementations (I2C needs an extra byte).
+        self.poweron()
+        self.init_display()
+
+    def init_display(self):
+        for cmd in (
+            SET_DISP | 0x00, # off
+            # address setting
+            SET_MEM_ADDR, 0x00, # horizontal
+            # resolution and layout
+            SET_DISP_START_LINE | 0x00,
+            SET_SEG_REMAP | 0x01, # column addr 127 mapped to SEG0
+            SET_MUX_RATIO, self.height - 1,
+            SET_COM_OUT_DIR | 0x08, # scan from COM[N] to COM0
+            SET_DISP_OFFSET, 0x00,
+            SET_COM_PIN_CFG, 0x02 if self.height == 32 else 0x12,
+            # timing and driving scheme
+            SET_DISP_CLK_DIV, 0x80,
+            SET_PRECHARGE, 0x22 if self.external_vcc else 0xf1,
+            SET_VCOM_DESEL, 0x30, # 0.83*Vcc
+            # display
+            SET_CONTRAST, 0xff, # maximum
+            SET_ENTIRE_ON, # output follows RAM contents
+            SET_NORM_INV, # not inverted
+            # charge pump
+            SET_CHARGE_PUMP, 0x10 if self.external_vcc else 0x14,
+            SET_DISP | 0x01): # on
+            self.write_cmd(cmd)
+        self.fill(0)
+        self.show()
+
+    def poweroff(self):
+        self.write_cmd(SET_DISP | 0x00)
+
+    def contrast(self, contrast):
+        self.write_cmd(SET_CONTRAST)
+        self.write_cmd(contrast)
+
+    def invert(self, invert):
+        self.write_cmd(SET_NORM_INV | (invert & 1))
+
+    def show(self):
+        x0 = 0
+        x1 = self.width - 1
+        if self.width == 64:
+            # displays with width of 64 pixels are shifted by 32
+            x0 += 32
+            x1 += 32
+        self.write_cmd(SET_COL_ADDR)
+        self.write_cmd(x0)
+        self.write_cmd(x1)
+        self.write_cmd(SET_PAGE_ADDR)
+        self.write_cmd(0)
+        self.write_cmd(self.pages - 1)
+        self.write_framebuf()
+
+    def fill(self, col):
+        self.framebuf.fill(col)
+
+    def pixel(self, x, y, col):
+        self.framebuf.pixel(x, y, col)
+
+    def scroll(self, dx, dy):
+        self.framebuf.scroll(dx, dy)
+
+    def text(self, string, x, y, col=1):
+        self.framebuf.text(string, x, y, col)
+
+
+class SSD1306_I2C(SSD1306):
+    def __init__(self, width, height, i2c, addr=0x3c, external_vcc=False):
+        self.i2c = i2c
+        self.addr = addr
+        self.temp = bytearray(2)
+        # Add an extra byte to the data buffer to hold an I2C data/command byte
+        # to use hardware-compatible I2C transactions.  A memoryview of the
+        # buffer is used to mask this byte from the framebuffer operations
+        # (without a major memory hit as memoryview doesn't copy to a separate
+        # buffer).
+        self.buffer = bytearray(((height // 8) * width) + 1)
+        self.buffer[0] = 0x40  # Set first byte of data buffer to Co=0, D/C=1
+        self.framebuf = framebuf.FrameBuffer1(memoryview(self.buffer)[1:], width, height)
+        super().__init__(width, height, external_vcc)
+
+    def write_cmd(self, cmd):
+        self.temp[0] = 0x80 # Co=1, D/C#=0
+        self.temp[1] = cmd
+        self.i2c.writeto(self.addr, self.temp)
+
+    def write_framebuf(self):
+        # Blast out the frame buffer using a single I2C transaction to support
+        # hardware I2C interfaces.
+        self.i2c.writeto(self.addr, self.buffer)
+
+    def poweron(self):
+        pass
+
+
+class SSD1306_SPI(SSD1306):
+    def __init__(self, width, height, spi, dc, res, cs, external_vcc=False):
+        self.rate = 10 * 1024 * 1024
+        dc.init(dc.OUT, value=0)
+        res.init(res.OUT, value=0)
+        cs.init(cs.OUT, value=1)
+        self.spi = spi
+        self.dc = dc
+        self.res = res
+        self.cs = cs
+        self.buffer = bytearray((height // 8) * width)
+        self.framebuf = framebuf.FrameBuffer1(self.buffer, width, height)
+        super().__init__(width, height, external_vcc)
+
+    def write_cmd(self, cmd):
+        self.spi.init(baudrate=self.rate, polarity=0, phase=0)
+        self.cs.high()
+        self.dc.low()
+        self.cs.low()
+        self.spi.write(bytearray([cmd]))
+        self.cs.high()
+
+    def write_framebuf(self):
+        self.spi.init(baudrate=self.rate, polarity=0, phase=0)
+        self.cs.high()
+        self.dc.high()
+        self.cs.low()
+        self.spi.write(self.buffer)
+        self.cs.high()
+
+    def poweron(self):
+        self.res.high()
+        time.sleep_ms(1)
+        self.res.low()
+        time.sleep_ms(10)
+        self.res.high()
+
+def unit_test():
+    import machine
+    from ssd1306 import SSD1306_I2C
+
+    WIDTH = const(128)
+    HEIGHT = const(64)
+    sda_pin = machine.Pin(21)
+    scl_pin = machine.Pin(22)
+
+    i2c = machine.I2C(scl=scl_pin, sda=sda_pin)
+
+    print(i2c.scan())
+
+    ssd = SSD1306_I2C(WIDTH, HEIGHT, i2c)
+    ssd.fill(1)
+    ssd.show()