{ "build": { "cpu": "cortex-m4", "extra_flags": "-DSTM32F446xx", "f_cpu": "180000000L", "mcu": "stm32f446ret6", "variant": "MARLIN_F446VE" }, "connectivity": [ "can" ], "debug": { "jlink_device": "STM32F446RE", "openocd_target": "stm32f4x", "svd_path": "STM32F446x.svd" }, "frameworks": [ "arduino", "stm32cube" ], "name": "3D Printer control board", "upload": { "maximum_ram_size": 131072, "maximum_size": 524288, "protocol": "stlink", "protocols": [ "jlink", "stlink", "blackmagic", "serial" ] }, "url": "https://www.st.com/en/microcontrollers-microprocessors/stm32f446.html", "vendor": "FYSETC" }