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AVR146
File
statefunc.c
statefunc.h
Type
C source code
Header file
Note
Functions related to the states defined
in menu file
4.3 Overview
The firmware integrates all functions required to charge a lithium-ion battery.
Table 4-3. Memory requirements of firmware (IAR without optimization)
Build option
Debug
Memory
CODE (Flash)
DATA (SRAM)
XDATA (EEPROM)
Approximate value
13900 bytes
1109 bytes
2 bytes
4.4 State Machine
A state machine is implemented in battery task. This state machine is rather simple
and uses function pointers. It simply looks up the address of the next function to
execute and then jumps to that function. The flow chart of the state machine is
illustrated in the figure below.
Figure 4-2. Flow chart of main function, including the state machine
ADC measurements update
+
Uart state machine
Look up address for Current State
Jump to function of Current State
State function
Next State
Look up address for Next State
Set Current State = Next State
Upon return, the state machine expects the function to indicate the next state as a
return argument. The recognised return codes are described in the table below.
Table 4-4. State machine codes (see source code, menu.h)
Label
INIT
BATCON
Related Function
Initialize()
BatteryControl()
Description
Entry state
Check hardware and batteries
13
7801A-AVR-06/08
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