CONFIG_ARM=y
CONFIG_BOARD_96B_NEONKEY=y
CONFIG_SOC_FAMILY_STM32=y
CONFIG_SOC_SERIES_STM32F4X=y
CONFIG_SOC_STM32F411XE=y
CONFIG_CORTEX_M_SYSTICK=y

# 84MHz system clock
CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=84000000
CONFIG_SYS_CLOCK_TICKS_PER_SEC=1000

# enable uart driver
CONFIG_SERIAL=y
CONFIG_UART_STM32=y

# enable USART1
CONFIG_UART_STM32_PORT_1=y

# enable pinmux
CONFIG_PINMUX=y
CONFIG_PINMUX_STM32=y

# enable GPIOs
CONFIG_GPIO=y
CONFIG_GPIO_STM32=y
CONFIG_GPIO_STM32_PORTA=y
CONFIG_GPIO_STM32_PORTB=y
CONFIG_GPIO_STM32_PORTC=y
CONFIG_GPIO_STM32_PORTD=y
CONFIG_GPIO_STM32_PORTE=y

# clock configuration
CONFIG_CLOCK_CONTROL=y

# SYSCLK selection
CONFIG_CLOCK_STM32_SYSCLK_SRC_PLL=y

# PLL configuration
CONFIG_CLOCK_STM32_PLL_SRC_HSI=y

# produce 84MHz clock at PLL output
CONFIG_CLOCK_STM32_PLL_M_DIVISOR=16
CONFIG_CLOCK_STM32_PLL_N_MULTIPLIER=336
CONFIG_CLOCK_STM32_PLL_P_DIVISOR=4
CONFIG_CLOCK_STM32_AHB_PRESCALER=1

# APB1 clock must not exceed 50MHz limit
CONFIG_CLOCK_STM32_APB1_PRESCALER=2
CONFIG_CLOCK_STM32_APB2_PRESCALER=1

# console
CONFIG_CONSOLE=y
CONFIG_UART_CONSOLE=y