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The GOTO command tells the program to jump to program address
specified by the value k. K is usually represented in assembly language
by a text label. However, "$" represents the current address that the
program is currently at and "$" can be used to jump to, back from, or
ahead of the current program counter.
|Code Example 1:
Follows are some examples of using GOTO to jump to specific addresses
in program memory. This program is, in essence, and endless loop.
First the program will jump to the routine MAIN_2, which in turn tells
the MCU to jump to the routine MAIN+1 (which is the NOP command), and
then the program jumps to the current program counter - 2, which is the
first GOTO command in the list.
|A label defining this code block as MAIN.
Jump to the code block labeled MAIN_2
Jump to the current address - 1, which would be the NOP.
A label defining this code block as MAIN_2
Go to the code block labeled MAIN plus 1 address.
Another example of an endless loop would be "GOTO $" which tells
the program to jump to the current program address. The MCU will
execute this command forever, or until you kill the power.
is useful command in the aseembly arsenal, but it shouldn't be used to
replace the CALL (and RETURN) commands, which are more powerful when