micropython/stmhal/boards/STM32F7DISC/board_init.c

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#include STM32_HAL_H
void STM32F7DISC_board_early_init(void) {
GPIO_InitTypeDef GPIO_InitStructure;
__GPIOK_CLK_ENABLE();
// Turn off the backlight. LCD_BL_CTRL = PK3
GPIO_InitStructure.Pin = GPIO_PIN_3;
GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStructure.Pull = GPIO_PULLUP;
GPIO_InitStructure.Speed = GPIO_SPEED_HIGH;
HAL_GPIO_Init(GPIOK, &GPIO_InitStructure);
HAL_GPIO_WritePin(GPIOK, GPIO_PIN_3, GPIO_PIN_RESET);
}