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exception handling for hexpansion I2C #190

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exception handling for hexpansion I2C #190

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16 changes: 13 additions & 3 deletions modules/lib/eeprom_i2c.py
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Original file line number Diff line number Diff line change
Expand Up @@ -98,10 +98,20 @@ def readwrite(self, addr, buf, read):
# Offset address into chip: one or two bytes
vaddr = self._addrbuf[1:] if self._onebyte else self._addrbuf
if read:
self._i2c.writeto(self._i2c_addr, vaddr)
self._i2c.readfrom_into(self._i2c_addr, mvb[start : start + npage])
try:
self._i2c.writeto(self._i2c_addr, vaddr)
self._i2c.readfrom_into(self._i2c_addr, mvb[start : start + npage])
except OSError:
# failure - possibly a hexpansion has been removed
nbytes = 0
else:
self._i2c.writevto(self._i2c_addr, (vaddr, buf[start : start + npage]))
try:
self._i2c.writevto(
self._i2c_addr, (vaddr, buf[start : start + npage])
)
except OSError:
# failure - possibly a hexpansion has been removed
nbytes = 0
self._wait_rdy()
nbytes -= npage
start += npage
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