Espressif ESP32-S2 Programming Manual page 1499

Chapter 4. API Guides
STAGE_INC –Increment stage count register
Syntax STAGE_INC Value
Operands
• Value –8 bits value
Cycles 2 cycles to execute, 4 cycles to fetch next instruction
Description The instruction increments stage count register by given value.
Examples:
1: STAGE_INC
2: // Up counting loop example:
STAGE_RST
label: STAGE_INC
NOP
JUMPS
STAGE_DEC –Decrement stage count register
Syntax STAGE_DEC Value
Operands
• Value –8 bits value
Cycles 2 cycles to execute, 4 cycles to fetch next instruction
Description The instruction decrements stage count register by given value.
Examples:
1: STAGE_DEC
2: // Down counting loop exaple
STAGE_RST
STAGE_INC
label: STAGE_DEC
NOP
JUMPS
HALT –End the program
Syntax HALT
Operands No operands
Cycles 2 cycles to execute
Description The instruction halts the ULP coprocessor and restarts ULP wakeup timer, if it is enabled.
Examples:
1: HALT //
WAKE –Wake up the chip
Syntax WAKE
Operands No operands
Cycles 2 cycles to execute, 4 cycles to fetch next instruction
Description The instruction sends an interrupt from ULP to RTC controller.
• If the SoC is in deep sleep mode, and ULP wakeup is enabled, this causes the SoC to wake up.
• If the SoC is not in deep sleep mode, and ULP interrupt bit (RTC_CNTL_ULP_CP_INT_ENA) is set
in RTC_CNTL_INT_ENA_REG register, RTC interrupt will be triggered.
Espressif Systems
10 // stage_cnt
// set
1 // stage_cnt++
// do something
label, 16, LT // jump to label
10 // stage_cnt
// set
16 // increment stage_cnt to
1 // stage_cnt--;
// do something
label, 0, GT // jump to label
Halt the coprocessor
1488
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+= 10
stage_cnt to 0
if stage_cnt
-= 10;
stage_cnt to 0
16
if stage_cnt
< 16
> 0
Release v4.4