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@@ -143,7 +143,7 @@ class CC1101:
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response = self._spi.xfer([start_register | self._WRITE_BURST] + values)
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assert len(response) == len(values) + 1, response
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self._log_chip_status_byte(response[0])
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- assert all(v == 0x0F for v in response[1:]), response # TODO why?
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+ assert all(v == response[0] for v in response[1:]), response
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def _reset(self) -> None:
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self._command_strobe(StrobeAddress.SRES)
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@@ -223,6 +223,29 @@ class CC1101:
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mdmcfg2 |= modulation_format << 4
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self._write_burst(ConfigurationRegisterAddress.MDMCFG2, [mdmcfg2])
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+ def _set_power_amplifier_setting_index(self, setting_index: int) -> None:
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+ """
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+ FREND0.PA_POWER
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+
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+ > This value is an index to the PATABLE,
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+ > which can be programmed with up to 8 different PA settings.
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+
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+ > In OOK/ASK mode, this selects the PATABLE index to use
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+ > when transmitting a '1'.
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+ > PATABLE index zero is used in OOK/ASK when transmitting a '0'.
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+ > The PATABLE settings from index 0 to the PA_POWER value are
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+ > used for > ASK TX shaping, [...]
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+
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+ see "Figure 32: Shaping of ASK Signal"
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+
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+ > If OOK modulation is used, the logic 0 and logic 1 power levels
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+ > shall be programmed to index 0 and 1 respectively.
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+ """
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+ frend0 = self._read_single_byte(ConfigurationRegisterAddress.FREND0)
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+ frend0 &= 0b000
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+ frend0 |= setting_index
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+ self._write_burst(ConfigurationRegisterAddress.FREND0, [setting_index])
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+
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def __enter__(self) -> "CC1101":
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# https://docs.python.org/3/reference/datamodel.html#object.__enter__
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self._spi.open(0, 0)
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@@ -244,6 +267,7 @@ class CC1101:
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)
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# 6:4 MOD_FORMAT: OOK (default: 2-FSK)
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self._set_modulation_format(self.ModulationFormat.ASK_OOK)
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+ self._set_power_amplifier_setting_index(1)
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# 7:6 unused
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# 5:4 FS_AUTOCAL: calibrate when going from IDLE to RX or TX
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# 3:2 PO_TIMEOUT: default
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