Merge pull request #45 from bcmi-labs/reduce_rom_usage

Reduce rom usage

Author: pennam

mbed_app.json

@@ -1,6 +1,6 @@
 {
     "requires": ["bare-metal", "mbedtls", "mcuboot", "flashiap-block-device", "spif-driver", "qspif", "mbed-trace", "filesystem", "fat_chan", "littlefs", "rtos", "cmsis-cmsis5-rtos2", "events"],
-    "macros": ["USE_USB_HS", "LOWSPEED=1", "MBEDTLS_USER_CONFIG_FILE=\"mbedtls_config.h\""],
+    "macros": ["MBED_FAULT_HANDLER_DISABLED", "USE_USB_HS", "LOWSPEED=1", "MBEDTLS_USER_CONFIG_FILE=\"mbedtls_config.h\""],
     "config": {
         "serial-bootloader-enable": {
             "help": "Build bootloader with serial update support",
@@ -53,8 +53,13 @@
             "target.extra_labels_remove" : ["CORDIO"],
             "target.features_remove" : ["BLE"],
             "target.device_has_remove": ["USBDEVICE", "EMAC", "CAN", "SPI_ASYNCH", "SPISLAVE", "SPI","SERIAL_FC", "PWMOUT", "ANALOGIN", "ANALOGOUT", "I2CSLAVE", "I2C_ASYNC", "OSPI", "TRNG", "DAC", "CRC", "WATCHDOG", "RTC", "LPTICKER", "SLEEP"],
+            "target.printf_lib": "minimal-printf",
+            "platform.minimal-printf-enable-floating-point": false,
+            "platform.minimal-printf-enable-64-bit": false,
+            "platform.stdio-flush-at-exit": false,
             "platform.stdio-baud-rate": 115200,
             "fat_chan.ff_use_mkfs": 0,
+            "fat_chan.ff_use_lfn": 0,
             "fat_chan.ff_fs_rpath": 0,
             "mcuboot.primary-slot-address": "0x8020000",
             "mcuboot.slot-size": "0x1E0000",