esp idf 4.4.6 SDMMC variable bug? (IDFGH-12658)

[uragan1987]

Answers checklist.

• [X] I have read the documentation ESP-IDF Programming Guide and the issue is not addressed there.
• [X] I have updated my IDF branch (master or release) to the latest version and checked that the issue is present there.
• [X] I have searched the issue tracker for a similar issue and not found a similar issue.

IDF version.

esp idf 4.4.6

Operating System used.

Windows

How did you build your project?

Command line with idf.py

If you are using Windows, please specify command line type.

None

What is the expected behavior?

want to compile after adding just more debug output inside code, cant compile

target is: ESP32

What is the actual behavior?

get error: "clk" undeclared

but "clk" is one line later used by code without beeing declared????? how does it works?

Steps to reproduce.

this is the line: https://github.com/espressif/esp-idf/blob/309ffa5565ad88edc262f2d6fb3e45567192bbb0/components/driver/sdmmc_host.c#L442

just add printf("clk %d", clk);

Build or installation Logs.

[1/9] Performing build step for 'bootloader'
[1/1] cmd.exe /C "cd /D C:\Users\ProgPC\Desktop\MMC_SD\HelloWorld\sd_card\sdmmc\build\bootloader\esp-idf\esptool_py && C:\Espressif\python_env\idf4.4_py3.11_env\Scripts\python.exe C:/Espressif/frameworks/esp-idf-v4.4.6/components/partition_table/check_sizes.py --offset 0x8000 bootloader 0x1000 C:/Users/ProgPC/Desktop/MMC_SD/HelloWorld/sd_card/sdmmc/build/bootloader/bootloader.bin"
Bootloader binary size 0x6430 bytes. 0xbd0 bytes (11%) free.
[2/7] Building C object esp-idf/driver/CMakeFiles/__idf_driver.dir/sdmmc_host.c.obj
FAILED: esp-idf/driver/CMakeFiles/__idf_driver.dir/sdmmc_host.c.obj 
ccache C:\Espressif\tools\xtensa-esp32-elf\esp-2021r2-patch5-8.4.0\xtensa-esp32-elf\bin\xtensa-esp32-elf-gcc.exe  -IC:/Users/ProgPC/Desktop/MMC_SD/HelloWorld/sd_card/sdmmc/build/config -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/driver/include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/driver/esp32/include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/driver/include/driver -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/newlib/platform_include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/freertos/include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/freertos/include/esp_additions/freertos -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/freertos/port/xtensa/include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/freertos/include/esp_additions -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/esp_hw_support/include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/esp_hw_support/include/soc -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/esp_hw_support/include/soc/esp32 -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/esp_hw_support/port/esp32/. -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/esp_hw_support/port/esp32/private_include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/heap/include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/log/include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/lwip/include/apps -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/lwip/include/apps/sntp -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/lwip/lwip/src/include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/lwip/port/esp32/include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/lwip/port/esp32/include/arch -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/soc/include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/soc/esp32/. -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/soc/esp32/include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/hal/esp32/include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/hal/include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/hal/platform_port/include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/esp_rom/include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/esp_rom/include/esp32 -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/esp_rom/esp32 -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/esp_common/include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/esp_system/include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/esp_system/port/soc -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/esp_system/port/public_compat -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/esp32/include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/xtensa/include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/xtensa/esp32/include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/esp_pm/include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/esp_ringbuf/include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/efuse/include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/efuse/esp32/include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/vfs/include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/esp_wifi/include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/esp_event/include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/esp_netif/include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/esp_eth/include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/tcpip_adapter/include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/esp_phy/include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/esp_phy/esp32/include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/esp_ipc/include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/app_trace/include -IC:/Espressif/frameworks/esp-idf-v4.4.6/components/esp_timer/include -mlongcalls -Wno-frame-address  -ffunction-sections -fdata-sections -Wall -Werror=all -Wno-error=unused-function -Wno-error=unused-variable -Wno-error=deprecated-declarations -Wextra -Wno-unused-parameter -Wno-sign-compare -ggdb -Og -fmacro-prefix-map=C:/Users/ProgPC/Desktop/MMC_SD/HelloWorld/sd_card/sdmmc=. -fmacro-prefix-map=C:/Espressif/frameworks/esp-idf-v4.4.6=IDF -fstrict-volatile-bitfields -Wno-error=unused-but-set-variable -fno-jump-tables -fno-tree-switch-conversion -std=gnu99 -Wno-old-style-declaration -D_GNU_SOURCE -DIDF_VER=\"v4.4.6-dirty\" -DESP_PLATFORM -D_POSIX_READER_WRITER_LOCKS -MD -MT esp-idf/driver/CMakeFiles/__idf_driver.dir/sdmmc_host.c.obj -MF esp-idf\driver\CMakeFiles\__idf_driver.dir\sdmmc_host.c.obj.d -o esp-idf/driver/CMakeFiles/__idf_driver.dir/sdmmc_host.c.obj -c C:/Espressif/frameworks/esp-idf-v4.4.6/components/driver/sdmmc_host.c
C:/Espressif/frameworks/esp-idf-v4.4.6/components/driver/sdmmc_host.c: In function 'sdmmc_host_init_slot':
C:/Espressif/frameworks/esp-idf-v4.4.6/components/driver/sdmmc_host.c:442:19: error: 'clk' undeclared (first use in this function)
  printf("clk %d", clk);
                   ^~~
C:/Espressif/frameworks/esp-idf-v4.4.6/components/driver/sdmmc_host.c:442:19: note: each undeclared identifier is reported only once for each function it appears in
ninja: build stopped: subcommand failed.
Executing action: all (aliases: build)
Running ninja in directory C:\Users\ProgPC\Desktop\MMC_SD\HelloWorld\sd_card\sdmmc\build
Executing "ninja all"...

More Information.

win10 20H2

[igrr]

You probably need to print the value of sdmmc_slot_gpio_num[slot].clk — please check the definition of configure_pin macro.

https://github.com/espressif/esp-idf/blob/309ffa5565ad88edc262f2d6fb3e45567192bbb0/components/driver/sdmmc_host.c#L64

[uragan1987]

maybe you can explain me, why "clk" at code not defined, but there is no compiler error?

[uragan1987]

i have a ESP32S3, using (1 line) connection (only D0) to SDMMC works fine but same with ESP32 devkitv1 (ESP32-WROOM-32) wont work, cant get connected cable was checked 100x times, but every time get a 0x107 error, PIN on 14,15,2

dunno whats wrong here

thats why i currently stucked on this "clk", try to change it

[igrr]

thats why i currently stucked on this "clk", try to change it

Sadly it's not possible: on the ESP32, SDMMC pins are fixed. The ability to route SDMMC to arbitrary pins has been added starting from ESP32-S3.

maybe you can explain me, why "clk" at code not defined, but there is no compiler error?

This is because the configure_pin macro I have linked to above replaces the name clk with sdmmc_slot_gpio_num[slot].clk.

every time get a 0x107 error, PIN on 14,15,2

We can try to help you with this issue. Please enable verbose log level in menuconfig and attach the output you get when initializing the card. Also please attach the schematic showing how the card is connected.

[uragan1987]

here are all logs

cmd_log.txt monitor.txt

[igrr]

@uragan1987 Looks like you are missing pull-up resistors on D0 and CMD lines. Note that when using SD cards in 1-line mode, you still need to connect D3 line of the SD card to VDD, otherwise the card might enter SPI mode.

[uragan1987]

@igrr i dont have a D0 on this PCB

I need to connect D3 to VDD? Cause on ESP32-S3 i dont connect D3 to board and 1-line work fine

[igrr]

i dont have a D0 on this PCB

That's the orange line shown on your diagram, connected between GPIO2 of the ESP and D0 (data 0) line of the card. It needs a pull-up resistor to VDD (3.3V).

I need to connect D3 to VDD?

The best option is to connect it to VDD with a pull-up resistor.

Cause on ESP32-S3 i dont connect D3 to board and 1-line work fine

It is possible that there are other causes of the issue you are seeing, but I'd like to eliminate the obvious ones related to hardware, first.

If you have a logic analyzer and if you can capture the waveform on SD bus while the card is being initialized, this would also help troubleshooting this issue.