I have a project where I need the board to decode json data from a tcp socket.
The code works, however, I get an unacceptable amount of TCP retransmissions.
(my PC is .250, the board is .7, connected through a switch here on my desk. The issue still occurs if I am connected directly to the board, through a MDI or MXI-X cable)
Additionally, if I ping my board through windows, Windows only recognizes ~25% of the replies. Linux is better at approx 75% (or 25% packet loss).
I have been unable to track down this issue.
Here is the compilation script (for the configuration macros that aren't in the header files)
arm-none-eabi-c++ -std=c++23 -DCPU_MIMXRT1024DAG5A -DETH_RX_TASK_PRIO=8 -DCACHE_DISABLE -DBECK_BOARD_REVISION_MAJOR=2 -DFSL_OSA_ALLOCATED_HEAP=0 -DCPU_MIMXRT1024DAG5A_cm7 -DDEBUG_CONSOLE_TRANSFER_NON_BLOCKING -DHAL_UART_TRANSFER_MODE=1 -DENET_ENHANCEDBUFFERDESCRIPTOR_MODE -DARDUINOJSON_ENABLE_STD_STREAM=0 -DFSL_SDK_ENABLE_DRIVER_CACHE_CONTROL -DPING_USE_SOCKETS -DSDK_DEBUGCONSOLE_UART -DSKIP_SYSCLK_INIT -DUTASKER_LOADER -DFSL_FEATURE_PHYKSZ8081_USE_RMII50M_MODE -DSDK_USE_RTOS=1 -DSERIAL_PORT_TYPE_UART=1 -DSDK_DEBUGCONSOLE=1 -D__MCUXPRESSO -D__USE_CMSIS -DDEBUG -D__NEWLIB__ -DSDK_OS_FREE_RTOS -DUSE_RTOS -DLWIP_DISABLE_PBUF_POOL_SIZE_SANITY_CHECKS=1 -I"C:\Users\gavund\Documents\Work\mcux-workspace1\BA-5533-Software\drivers" -I"C:\Users\gavund\Documents\Work\mcux-workspace1\BA-5533-Software\device" -I"C:\Users\gavund\Documents\Work\mcux-workspace1\BA-5533-Software\CMSIS" -I"C:\Users\gavund\Documents\Work\mcux-workspace1\BA-5533-Software\component\serial_manager" -I"C:\Users\gavund\Documents\Work\mcux-workspace1\BA-5533-Software\component\uart" -I"C:\Users\gavund\Documents\Work\mcux-workspace1\BA-5533-Software\utilities" -I"C:\Users\gavund\Documents\Work\mcux-workspace1\BA-5533-Software\component\lists" -I"C:\Users\gavund\Documents\Work\mcux-workspace1\BA-5533-Software\component\phy" -I"C:\Users\gavund\Documents\Work\mcux-workspace1\BA-5533-Software\freertos\freertos-kernel\include" -I"C:\Users\gavund\Documents\Work\mcux-workspace1\BA-5533-Software\freertos\freertos-kernel\portable\GCC\ARM_CM4F" -I"C:\Users\gavund\Documents\Work\mcux-workspace1\BA-5533-Software\source" -I"C:\Users\gavund\Documents\Work\mcux-workspace1\BA-5533-Software\drivers\freertos" -I"C:\Users\gavund\Documents\Work\mcux-workspace1\BA-5533-Software\board" -I"C:\Users\gavund\Documents\Work\mcux-workspace1\BA-5533-Software\lwip\port" -I"C:\Users\gavund\Documents\Work\mcux-workspace1\BA-5533-Software\lwip\src" -I"C:\Users\gavund\Documents\Work\mcux-workspace1\BA-5533-Software\lwip\src\include" -I"C:\Users\gavund\Documents\Work\mcux-workspace1\BA-5533-Software\component\silicon_id" -I"C:\Users\gavund\Documents\Work\mcux-workspace1\BA-5533-Software\CMSIS_driver\Include" -I"C:\Users\gavund\Documents\Work\mcux-workspace1\BA-5533-Software\nor_flash" -I"C:\Users\gavund\Documents\Work\mcux-workspace1\BA-5533-Software\lwip\contrib\apps\ping" -I"C:\Users\gavund\Documents\Work\mcux-workspace1\BA-5533-Software\component\osa" -I"C:\Users\gavund\Documents\Work\mcux-workspace1\BA-5533-Software\usb\host\class" -I"C:\Users\gavund\Documents\Work\mcux-workspace1\BA-5533-Software\lwip\template" -I"C:\Users\gavund\Documents\Work\mcux-workspace1\BA-5533-Software\usb\host" -I"C:\Users\gavund\Documents\Work\mcux-workspace1\BA-5533-Software\usb\phy" -I"C:\Users\gavund\Documents\Work\mcux-workspace1\BA-5533-Software\usb\include" -I"C:\Users\gavund\Documents\Work\mcux-workspace1\BA-5533-Software\source\generated" -O0 -fno-common -g3 -gdwarf-4 -Wall -c -ffunction-sections -fdata-sections -ffreestanding -fno-builtin -fno-rtti -fno-exceptions -Wno-unknown-pragmas -fmerge-constants -fmacro-prefix-map="../source/Hardware/"= -mcpu=cortex-m7 -mfpu=fpv5-sp-d16 -mfloat-abi=hard -mthumb -D__NEWLIB__ -fstack-usage -MMD -MP -MF"source/Hardware/HardwareMisc.d" -MT"source/Hardware/HardwareMisc.o" -MT"source/Hardware/HardwareMisc.d" -o "source/Hardware/HardwareMisc.o" "../source/Hardware/HardwareMisc.cpp"
Note: the ETH_RX_TASK_PRIO did not effect the results, nor did enabling cache.
The memory layout for my project is:
INSTRUCTIONS: DRAM (same chip as the 1024-EVK)
MAIN HEAP: DTCM
FREERTOS HEAP: DTCM
MAIN STACK: DTCM
Linker scripts attached
Running the SDK example on my hardware, with the pings, it works 100% the way it needs to, windows sees all of the replies.
I have noticed that sometimes, wireshark will report that the ICMP checksums are incorrect. I have tried enabling the hardware checksums in lwipopts and that did not fix it (both hardware and software checksums occasionally generate incorrectly).
Has anyone else encountered this issue?
