zmk/app/boards/arm/ferris/ferris_rev02_defconfig

# SPDX-License-Identifier: MIT

CONFIG_BOARD_FERRIS=y
CONFIG_SOC_SERIES_STM32F0X=y
CONFIG_SOC_STM32F072XB=y
# 48MHz system clock
CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=48000000

# enable PINMUX
CONFIG_PINMUX=y

# enable GPIO
CONFIG_GPIO=y

# Enable i2c
CONFIG_I2C=y

# ZMK Settings
CONFIG_ZMK_USB=y
CONFIG_ZMK_KSCAN_GPIO_DRIVER=y
CONFIG_ZMK_KSCAN_COMPOSITE_DRIVER=y
CONFIG_ZMK_KSCAN_MATRIX_POLLING=y
CONFIG_USB_SELF_POWERED=n

# Enable IO multiplexer
CONFIG_GPIO_MCP23017=y

# Needed to reduce this to size that will fit on F072
CONFIG_HEAP_MEM_POOL_SIZE=1024

# clock configuration
CONFIG_CLOCK_CONTROL=y

# Clock configuration for Cube Clock control driver
CONFIG_CLOCK_STM32_SYSCLK_SRC_PLL=y
# use HSI as PLL input
CONFIG_CLOCK_STM32_PLL_SRC_HSI=y
# produce 48MHz clock at PLL output
# CONFIG_CLOCK_STM32_PLL_PREDIV=1
CONFIG_CLOCK_STM32_PLL_MULTIPLIER=6
CONFIG_CLOCK_STM32_AHB_PRESCALER=1
CONFIG_CLOCK_STM32_APB1_PRESCALER=1
# CONFIG_CLOCK_STM32_APB2_PRESCALER=1