QT-CART

QT-Server/hx711.py

@@ -0,0 +1,74 @@
+import lgpio
+import time
+
+
+class HX711:
+    def __init__(self, dout, pd_sck, gain=128):
+        self.DOUT = dout
+        self.PD_SCK = pd_sck
+
+        self.chip = lgpio.gpiochip_open(0)
+
+        lgpio.gpio_claim_input(self.chip, self.DOUT)
+        lgpio.gpio_claim_output(self.chip, self.PD_SCK)
+
+        self.GAIN = 1 if gain == 128 else 3 if gain == 64 else 2
+
+        self.OFFSET = 0
+        self.REFERENCE_UNIT = 1
+
+        self.set_gain(gain)
+
+    def is_ready(self):
+        return lgpio.gpio_read(self.chip, self.DOUT) == 0
+
+    def set_gain(self, gain):
+        if gain == 128:
+            self.GAIN = 1
+        elif gain == 64:
+            self.GAIN = 3
+        elif gain == 32:
+            self.GAIN = 2
+
+        self.read_raw()
+
+    def read_raw(self):
+        while not self.is_ready():
+            pass
+
+        data = 0
+        for _ in range(24):
+            lgpio.gpio_write(self.chip, self.PD_SCK, 1)
+            data = (data << 1) | lgpio.gpio_read(self.chip, self.DOUT)
+            lgpio.gpio_write(self.chip, self.PD_SCK, 0)
+
+        for _ in range(self.GAIN):
+            lgpio.gpio_write(self.chip, self.PD_SCK, 1)
+            lgpio.gpio_write(self.chip, self.PD_SCK, 0)
+
+        if data & 0x800000:
+            data -= 0x1000000
+
+        return data
+
+    def set_offset(self, offset):
+        self.OFFSET = offset
+
+    def set_reference_unit(self, value):
+        self.REFERENCE_UNIT = value
+
+    def get_value(self, times=5):
+        return sum(self.read_raw() for _ in range(times)) / times
+
+    def get_weight(self, times=5):
+        value = self.get_value(times) - self.OFFSET
+        return value / self.REFERENCE_UNIT
+
+    def power_down(self):
+        lgpio.gpio_write(self.chip, self.PD_SCK, 0)
+        lgpio.gpio_write(self.chip, self.PD_SCK, 1)
+        time.sleep(0.0001)
+
+    def power_up(self):
+        lgpio.gpio_write(self.chip, self.PD_SCK, 0)
+        time.sleep(0.0001)