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@@ -99,6 +99,7 @@ class NAU7802:
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for _ in range(100):
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status = self.read_reg(REG_PU_CTRL)
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if status & PU_PUR:
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+ logger.debug("Power-up ready")
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break
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time.sleep(0.001)
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else:
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@@ -108,18 +109,20 @@ class NAU7802:
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revision = self.read_reg(REG_REVISION)
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if (revision & 0x0F) != 0x0F:
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raise RuntimeError(f"Unexpected NAU7802 revision register: 0x{revision:02X}")
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-
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- logger.debug("NAU7802 revision=0x%02X", revision)
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+ logger.debug("Revision: 0x%02X", revision)
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# Internal LDO enable is PU_CTRL.AVDDS (bit 7); set LDO voltage to 3.0V.
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self._set_bit(REG_PU_CTRL, 7, True) # AVDDS=1 (internal LDO)
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self._set_field(REG_CTRL1, shift=3, width=3, value=0b101) # VLDO=3.0V
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+ logger.debug("LDO: 3.0V (internal)")
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# Gain: 128x (bits 2:0 of CTRL1 = 0b111)
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self._set_field(REG_CTRL1, shift=0, width=3, value=0b111)
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+ logger.debug("Gain: 128x")
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# Sample rate: 10 SPS (CTRL2 bits 6:4 = 0b000)
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self._set_field(REG_CTRL2, shift=4, width=3, value=0b000)
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+ logger.debug("Sample rate: 10 SPS")
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# Adafruit tuning: disable ADC chopper clock (ADC bits 5:4 = 0b11)
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self._set_field(REG_ADC, shift=4, width=2, value=0b11)
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@@ -129,17 +132,17 @@ class NAU7802:
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# Start conversion cycle
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self._set_bit(REG_PU_CTRL, 4, True)
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+ logger.debug("Conversion started")
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# Flush the first reading — the NAU7802 always returns a stale
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# max-scale value (0x7FFFFF) on the first conversion after power-up.
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for _ in range(200):
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if self.data_ready():
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self.read_raw() # discard
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+ logger.debug("First reading flushed")
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break
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time.sleep(0.010)
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- logger.debug("NAU7802 initialized: LDO=3.0V, gain=128x, rate=10SPS")
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-
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def data_ready(self) -> bool:
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return bool(self.read_reg(REG_PU_CTRL) & PU_CR)
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maziggy