i2c has 44 byte memory leak

[lu1210]

tprint(6,' B-i2c start',os.stats('mem')) hi2c:start() hi2c:address(0x62,true) status = hi2c:read() msb = hi2c:read() lsb = hi2c:read() hi2c:stop() tprint(6,' A-i2c stop ',os.stats('mem'))

B-i2c start 71560
A-i2c stop  71516

B-i2c start 71528
A-i2c stop  71484

[jolivepetrus]

@lu1210,

I have published some things related to I2C, but nothing related to your issue.

I think that your issue is due to the Lua garbage collector. I usually detect memory leaks executing the suspect code in an infinite loop, that fails if a memory leak is present (not enough memory).

The following code is running hours and hours, and things seem right:

BMEx_addr = 0x76    -- I2C address
BMEx_reg_id = 0xd0  -- ID register

-- Setup I2C
BMEx = i2c.attach(i2c.I2C1, i2c.MASTER, 1000)
BMEx:setspeed(400)

-- Read BMEx ID register
while true do
  BMEx:start()
  BMEx:address(BMEx_addr, false)
  BMEx:write(BMEx_reg_id)
  BMEx:stop()
  BMEx:start()
  BMEx:address(BMEx_addr, true)
  id = BMEx:read()
  BMEx:stop()
end

[lu1210]

You're right. That was a measurement error of mine. There was a second thread in addition.