implement littlefs for stm32 (#5987)

Co-authored-by: GUVWAF <78759985+GUVWAF@users.noreply.github.com>
Co-authored-by: Ben Meadors <benmmeadors@gmail.com>
Co-authored-by: Daniel Peter Chokola <dan.chokola@gmail.com>
Co-authored-by: Mark Trevor Birss <markbirss@gmail.com>
Co-authored-by: Austin <vidplace7@gmail.com>

variants/CDEBYTE_E77-MBL/platformio.ini

@@ -3,6 +3,7 @@ extends = stm32_base
 ; `ebyte_e77_dev` was added in this commit. Remove when a new release is used in the base.
 platform = https://github.com/platformio/platform-ststm32.git#3208828db447f4373cd303b7f7393c8fc0dae623
 board = ebyte_e77_dev
+board_upload.maximum_size = 233472 ; reserve the last 28KB for filesystem
 board_level = extra
 build_flags =
   ${stm32_base.build_flags}
@@ -11,31 +12,19 @@ build_flags =
   -DPIN_SERIAL_RX=PA3
   -DPIN_SERIAL_TX=PA2
   -DHAL_DAC_MODULE_ONLY
-  -DHAL_ADC_MODULE_DISABLED
-  -DHAL_COMP_MODULE_DISABLED
-  -DHAL_CRC_MODULE_DISABLED
-  -DHAL_CRYP_MODULE_DISABLED
-  -DHAL_GTZC_MODULE_DISABLED
-  -DHAL_HSEM_MODULE_DISABLED
-  -DHAL_I2C_MODULE_DISABLED
-  -DHAL_I2S_MODULE_DISABLED
-  -DHAL_IPCC_MODULE_DISABLED
-  -DHAL_IRDA_MODULE_DISABLED
-  -DHAL_IWDG_MODULE_DISABLED
-  -DHAL_LPTIM_MODULE_DISABLED
-  -DHAL_PKA_MODULE_DISABLED
-  -DHAL_RNG_MODULE_DISABLED
-  -DHAL_RTC_MODULE_DISABLED
-  -DHAL_SMARTCARD_MODULE_DISABLED
-  -DHAL_SMBUS_MODULE_DISABLED
-  -DHAL_TIM_MODULE_DISABLED
-  -DHAL_WWDG_MODULE_DISABLED
-  -DHAL_EXTI_MODULE_DISABLED
-  -DHAL_SAI_MODULE_DISABLED
-  -DHAL_ICACHE_MODULE_DISABLED
+  -DHAL_RNG_MODULE_ENABLED
   -DRADIOLIB_EXCLUDE_SX128X=1
   -DRADIOLIB_EXCLUDE_SX127X=1
   -DRADIOLIB_EXCLUDE_LR11X0=1
-; -D PIO_FRAMEWORK_ARDUINO_NANOLIB_FLOAT_PRINTF
+  -DMESHTASTIC_EXCLUDE_ENVIRONMENTAL_SENSOR=1
+  -DMESHTASTIC_EXCLUDE_I2C=1
+  -DMESHTASTIC_EXCLUDE_WIFI=1
+  -DMESHTASTIC_EXCLUDE_BLUETOOTH=1
+  -DMESHTASTIC_EXCLUDE_GPS=1
+  -DMESHTASTIC_EXCLUDE_SCREEN=1
+  -DMESHTASTIC_EXCLUDE_MQTT=1
+  -DMESHTASTIC_EXCLUDE_POWERMON=1
+  ;-DPIO_FRAMEWORK_ARDUINO_NANOLIB_FLOAT_PRINTF
+  ;-DCFG_DEBUG
 
 upload_port = stlink