OTA on M4

[pennam]

Constraints:

• only 1MB M7 + 1MB M4 flash split is supported (👀)

Notes:

• run ./bin2ota.py PORTENTA_H7_M7 SKETCH.lzss SKETCH.ota even if you are creating an OTA file for the M4

[github-actions]

Memory usage change @ 3fd0d32

Board	flash	%	RAM for global variables	%
arduino:mbed:envie_m7	0 - 0	0.0 - 0.0	0 - 0	0.0 - 0.0
arduino:mbed_giga:giga	0 - 0	0.0 - 0.0	0 - 0	0.0 - 0.0
arduino:mbed_nicla:nicla_vision	0 - 0	0.0 - 0.0	0 - 0	0.0 - 0.0
arduino:mbed_opta:opta	0 - 0	0.0 - 0.0	0 - 0	0.0 - 0.0

Click for full report table

Board	examples/OTA_Qspi_Flash flash	%	examples/OTA_Qspi_Flash RAM for global variables	%	examples/OTA_Qspi_Flash_Ethernet flash	%	examples/OTA_Qspi_Flash_Ethernet RAM for global variables	%	examples/OTA_SD_Portenta flash	%	examples/OTA_SD_Portenta RAM for global variables	%	examples/OTA_Usage_Portenta flash	%	examples/OTA_Usage_Portenta RAM for global variables	%
arduino:mbed:envie_m7	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0
arduino:mbed_giga:giga	0	0.0	0	0.0									0	0.0	0	0.0
arduino:mbed_nicla:nicla_vision	0	0.0	0	0.0									0	0.0	0	0.0
arduino:mbed_opta:opta	0	0.0	0	0.0	0	0.0	0	0.0					0	0.0	0	0.0

Click for full report CSV

Board,examples/OTA_Qspi_Flash<br>flash,%,examples/OTA_Qspi_Flash<br>RAM for global variables,%,examples/OTA_Qspi_Flash_Ethernet<br>flash,%,examples/OTA_Qspi_Flash_Ethernet<br>RAM for global variables,%,examples/OTA_SD_Portenta<br>flash,%,examples/OTA_SD_Portenta<br>RAM for global variables,%,examples/OTA_Usage_Portenta<br>flash,%,examples/OTA_Usage_Portenta<br>RAM for global variables,%
arduino:mbed:envie_m7,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0
arduino:mbed_giga:giga,0,0.0,0,0.0,,,,,,,,,0,0.0,0,0.0
arduino:mbed_nicla:nicla_vision,0,0.0,0,0.0,,,,,,,,,0,0.0,0,0.0
arduino:mbed_opta:opta,0,0.0,0,0.0,0,0.0,0,0.0,,,,,0,0.0,0,0.0

[github-actions]

Memory usage change @ 3eac365

Board	flash	%	RAM for global variables	%
arduino:mbed:envie_m7	0 - 0	0.0 - 0.0	0 - 0	0.0 - 0.0
arduino:mbed_giga:giga	0 - 0	0.0 - 0.0	0 - 0	0.0 - 0.0
arduino:mbed_nicla:nicla_vision	0 - 0	0.0 - 0.0	0 - 0	0.0 - 0.0
arduino:mbed_opta:opta	0 - 0	0.0 - 0.0	0 - 0	0.0 - 0.0

Click for full report table

Board	examples/OTA_Qspi_Flash flash	%	examples/OTA_Qspi_Flash RAM for global variables	%	examples/OTA_Qspi_Flash_Ethernet flash	%	examples/OTA_Qspi_Flash_Ethernet RAM for global variables	%	examples/OTA_SD_Portenta flash	%	examples/OTA_SD_Portenta RAM for global variables	%	examples/OTA_Usage_Portenta flash	%	examples/OTA_Usage_Portenta RAM for global variables	%
arduino:mbed:envie_m7	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0
arduino:mbed_giga:giga	0	0.0	0	0.0									0	0.0	0	0.0
arduino:mbed_nicla:nicla_vision	0	0.0	0	0.0									0	0.0	0	0.0
arduino:mbed_opta:opta	0	0.0	0	0.0	0	0.0	0	0.0					0	0.0	0	0.0

Click for full report CSV

Board,examples/OTA_Qspi_Flash<br>flash,%,examples/OTA_Qspi_Flash<br>RAM for global variables,%,examples/OTA_Qspi_Flash_Ethernet<br>flash,%,examples/OTA_Qspi_Flash_Ethernet<br>RAM for global variables,%,examples/OTA_SD_Portenta<br>flash,%,examples/OTA_SD_Portenta<br>RAM for global variables,%,examples/OTA_Usage_Portenta<br>flash,%,examples/OTA_Usage_Portenta<br>RAM for global variables,%
arduino:mbed:envie_m7,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0
arduino:mbed_giga:giga,0,0.0,0,0.0,,,,,,,,,0,0.0,0,0.0
arduino:mbed_nicla:nicla_vision,0,0.0,0,0.0,,,,,,,,,0,0.0,0,0.0
arduino:mbed_opta:opta,0,0.0,0,0.0,0,0.0,0,0.0,,,,,0,0.0,0,0.0

[aentinger]

Is this flash split maybe creating a compiler define that can be checked in code using the preprocessor, i.e.

#ifndef FLASH_SPLIT_1_1
# error "Only a flash split of 1MB M7 + 1MB M4 is allowed"
#endif

?

[aentinger]

I'm just thinking a compilation error is the simplest way to prevent foot-shooting 😁

[pennam]

Great idea! Thanks for the suggestion 🥇 i think we can use something like

#if CM4_BINARY_START != 0x08100000
# error "Only a flash split of 1MB M7 + 1MB M4 is allowed"
#endif

I'll test it later