ULP function not functioning properly on ESP32S3

[Llgok]

Board

ESP32S3 Dev Module

Device Description

ESP32S3 Dev Module

Hardware Configuration

not anything

Version

v2.0.14

IDE Name

Arduino IDE and PlatformIO IDE

Operating System

Windows 10

Flash frequency

80MHz

PSRAM enabled

yes

Upload speed

115200

Description

I attempted to compile a program for ULP counting using C Macros on ESP32S3 with Arduino IDE and PlatformIO IDE (2.0.14), but it did not work on ESP32S3 and threw an error "ulp: program too big: 11 words, max is 0 words". The same program worked fine on ESP32. Later, when I switched the library version to 3.0.0-alpha2, it failed to compile with the error "fatal error: esp32/ulp.h: No such file or directory".

Is the ULP functionality for ESP32S3 not well adapted on Arduino IDE yet? It's worth mentioning that in the latest ESP-IDF version, both ESP32S3 and ESP32 can successfully utilize the ULP functionality.

Sketch

#include <Arduino.h>
#include "esp32s3/ulp.h"
#include "driver/rtc_io.h"
#include "sdkconfig.h"

#define ULP_START_OFFSET 32

void ULP_Initialization()
{
    memset(RTC_SLOW_MEM, 0, CONFIG_ESP32S3_ULP_COPROC_RESERVE_MEM);

    const ulp_insn_t program[] = {
        I_MOVI(R0, 0), // R0 =0
        I_MOVI(R1, 0), // R1 = 0;

        M_LABEL(1), // do {

        // delay(1000);
        I_MOVI(R0, 200), // R0 = n * 1000 / 5, where n is the number of seconds to delay, 200 = 1 s
        M_LABEL(2),      // do {
                         // delay (5);
                         // since ULP runs at 8 MHz
                         // 40000 cycles correspond to 5 ms (max possible delay is 65535 cycles or 8.19 ms)
        I_DELAY(40000),
        I_SUBI(R0, R0, 1), // R0 --;
        M_BGE(2, 1),       // } while (R0 >= 1); ... jump to label 2 if R0 > 0

        I_ADDI(R1, R1, 1), // R1 ++
        // store sample count to RTC_SLOW_MEM [0]
        I_ST(R1, 0, 0), // RTC_SLOW_MEM [0] = R1;

        I_MOVR(R0, R1), 
        M_BL(1, 100),   // ... jump to label 1 if R0 < 100

        I_END(), 
    };
    
    size_t size = sizeof(program) / sizeof(ulp_insn_t);
    ulp_process_macros_and_load(0, program,&size);
    ulp_run(0);

    // in which it also prints the debug output mentioned earlier
    Serial.printf("ULP Mem in main app: %d\n", CONFIG_ESP32S3_ULP_COPROC_RESERVE_MEM);
}

void setup()
{
    Serial.begin(115200);
    ULP_Initialization();
}

void loop()
{
    for (int i = 0; i < 10; i++)
    {
        Serial.printf("RTC_SLOW_MEM[%d]: %d\n", i, RTC_SLOW_MEM[i] & 0xFFFF);
    }

Serial.printf("\n");
    delay(1000);
}

Debug Message

Build:Mar 27 2021
rst:0x15 (USB_UART_CHIP_RESET),boot:0x8 (SPI_FAST_FLASH_BOOT)
Saved PC:0x4201e66e
SPIWP:0xee
mode:DIO, clock div:1
load:0x3fce3808,len:0x44c
load:0x403c9700,len:0xbd8
load:0x403cc700,len:0x2a80
entry 0x403c98d0
E (2) ulp: program too big: 11 words, max is 0 words
ULP Mem in main app: 0
RTC_SLOW_MEM[0]: 47214
RTC_SLOW_MEM[1]: 0
RTC_SLOW_MEM[2]: 33694
RTC_SLOW_MEM[3]: 0
RTC_SLOW_MEM[4]: 58295
RTC_SLOW_MEM[5]: 50288
RTC_SLOW_MEM[6]: 32486
RTC_SLOW_MEM[7]: 4171
RTC_SLOW_MEM[8]: 38900
RTC_SLOW_MEM[9]: 30073

Other Steps to Reproduce

No response

I have checked existing issues, online documentation and the Troubleshooting Guide

• I confirm I have checked existing issues, online documentation and Troubleshooting guide.

[lbernstone]

Looks like CONFIG_ULP_COPROC_TYPE_FSM needs to be added for S2 & S3. I'll open an issue in the lib-builder.
Just FYI, the S2 & S3 include a RISC-V ULP as well which can be programmed directly with C.

[Llgok]

Looks like CONFIG_ULP_COPROC_TYPE_FSM needs to be added for S2 & S3. I'll open an issue in the lib-builder. Just FYI, the S2 & S3 include a RISC-V ULP as well which can be programmed directly with C.

Hello, I have just added CONFIG_ULP_COPROC_TYPE_FSM=y & CONFIG_ULP_COPROC_TYPE_RISCV=y in the sdkconfig file of ESP32S3, but the issue remains the same as before. Did I modify the sdkconfig file incorrectly?

# CONFIG_ESP32S3_TRAX is not set
CONFIG_ESP32S3_TRACEMEM_RESERVE_DRAM=0x0
# CONFIG_ESP32S3_ULP_COPROC_ENABLED is not set
CONFIG_ULP_COPROC_TYPE_FSM=y
CONFIG_ULP_COPROC_TYPE_RISCV=y
CONFIG_ESP32S3_ULP_COPROC_RESERVE_MEM=1024
CONFIG_ESP32S3_DEBUG_OCDAWARE=y
CONFIG_ESP32S3_BROWNOUT_DET=y
CONFIG_ESP32S3_BROWNOUT_DET_LVL_SEL_7=y
# CONFIG_ESP32S3_BROWNOUT_DET_LVL_SEL_6 is not set
# CONFIG_ESP32S3_BROWNOUT_DET_LVL_SEL_5 is not set
# CONFIG_ESP32S3_BROWNOUT_DET_LVL_SEL_4 is not set
# CONFIG_ESP32S3_BROWNOUT_DET_LVL_SEL_3 is not set
# CONFIG_ESP32S3_BROWNOUT_DET_LVL_SEL_2 is not set
# CONFIG_ESP32S3_BROWNOUT_DET_LVL_SEL_1 is not set

Arduino: sdkconfig file path -> ...\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.14\tools\sdk\esp32s3\sdkconfig
PlatformIO: sdkconfig file path -> ....platformio\packages\framework-arduinoespressif32\tools\sdk\esp32s3\sdkconfig

[lbernstone]

You would need to recompile the sdk from scratch. It will get fixed when the espressif guys make a new release.

[Llgok]

You would need to recompile the sdk from scratch. It will get fixed when the espressif guys make a new release.

Just now I cleared the compilation cache and recompiled from scratch, but the problem remains the same. The counting register did not change. Is there any feature that I haven't enabled yet?

[me-no-dev]

First you need to install 3.0.0-rc1 from the board manager (DEV JSON link) and then you can try to replace the libs in ...\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.0.0-rc1\tools\esp32-arduino-libs with the ones from here

This should enable ULP for you on S2 and S3. We will not be backporting it to 2.0.x

[Llgok]

First you need to install 3.0.0-rc1 from the board manager (DEV JSON link) and then you can try to replace the libs in ...\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.0.0-rc1\tools\esp32-arduino-libs with the ones from here

This should enable ULP for you on S2 and S3. We will not be backporting it to 2.0.x

I tried to adapt ULP in 3.0.0-rc1 but encountered an error when including the header file.

Error message ->
“fatal error: esp32s3/ulp.h: No such file or directory
11 | #include "esp32s3/ulp.h"
| ^~~~~~~~~~~~~~~
compilation terminated.

exit status 1

Compilation error: esp32s3/ulp.h: No such file or directory”

[mmirio]

This is "normal."
None of the examples compile for ESP32-S3..
ulp_riscv_uart.c:8:10: fatal error: ulp_riscv.h: No such file or directory
ulp_riscv_adc_ulp_core.h:10:10: fatal error: hal/adc_ll.h: No such file or directory

I haven't found any solution.