Hi Sam,

i read your code as well as the project. my understanding is (pls, correct me if i am wrong), you are building a PWM based DC-DC converter. you are doing this to match the solar panel output to the battery. you are incorporating the PWM to acheive constant power. if the above is not true
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could you pls explain your project so that we can understand it better
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else
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the following are my thoughts,
- generally the code is good, it will compile nicely and you can even simulate the function. however, for practical purposes it will not function as it is intended. 20uSec is too short a period for the 8051 running at 12 MHz.
the resolution will be poor. you are varying the duty cycle thro' adjust_duty_cycle() function, how is the frequency maintained ? if the for(;;;) is doing it, pls draw the output waveform including the dead time packets due to code execution and check for yourself.

- alternatively, you can use a standard PWM chip and include the uC + gas gauge + DAC combination into the PWM's outer control loop.
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