User Manual

PD57/60-1260 TMCL
™
Firmware Manual • Firmware Version V1.44 | Document Revision V1.02 • 2018-SEP-05
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Interrupt Processing Commands
Mnemonic Command number Meaning
EI 25 Enable interrupt
DI 26 Disable interrupt
VECT 37 Set interrupt vector
RETI 38 Return from interrupt
Table 11: Interrupt Processing Commands
3.5.6.1 Interrupt Types
There are many different interrupts in TMCL, like timer interrupts, stop switch interrupts, position reached
interrupts, and input pin change interrupts. Each of these interrupts has its own interrupt vector. Each
interrupt vector is identified by its interrupt number. Please use the TMCL include file Interrupts.inc in
order to have symbolic constants for the interrupt numbers. Table 12 show all interrupts that are available
on the PD57/60-1260.
Interrupt Vectors
Interrupt number Interrupt type
0 Timer 0
1 Timer 1
2 Timer 2
3 Target position reached 0
15 StallGuard axis 0
21 Deviation axis 0
27 Left stop switch 0
28 Right stop switch 0
39 Input change 0
40 Input change 1
41 Input change 2
255 Global interrupts
Table 12: Interrupt Vectors
3.5.6.2 Interrupt Processing
When an interrupt occurs and this interrupt is enabled and a valid interrupt vector has been defined
for that interrupt, the normal TMCL program flow will be interrupted and the interrupt handling routine
will be called. Before an interrupt handling routine gets called, the context of the normal program (i.e.
accumulator register, X register, flags) will be saved automatically.
There is no interrupt nesting, i.e. all other interrupts are disabled while an interrupt handling routine is
being executed.
On return from an interrupt handling routine (RETI command), the context of the normal program will
automatically be restored and the execution of the normal program will be continued.
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