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set the payload length #3

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set the payload length #3

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38160a0
support to set the payload length when the implicit mode is on
Apr 19, 2023
aac79c7
Merge branch 'master' of https://github.com/deltazita/micropython-lora
Apr 19, 2023
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10 changes: 10 additions & 0 deletions lora.py
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Original file line number Diff line number Diff line change
Expand Up @@ -170,6 +170,16 @@ def set_coding_rate(self, denom):
def set_preamble_length(self, n):
self._write(REG_PREAMBLE_MSB, (n >> 8) & 0xff)
self._write(REG_PREAMBLE_LSB, (n >> 0) & 0xff)

def set_payload_length(self, n):
m = self._read(REG_PAYLOAD_LENGTH)
p = MAX_PKT_LENGTH - TX_BASE_ADDR
if n + m > p:
raise ValueError('Max payload length is ' + str(p))
if self._implicit:
self._write(REG_PAYLOAD_LENGTH, m+n)
else:
raise ValueError("Not in implicit mode")

def set_crc(self, crc=False):
modem_config_2 = self._read(REG_MODEM_CONFIG_2)
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