4fe6d47683
The board shares many features with other Arduinos based on STM32H747 (like the HSE in bypass mode). Once https://github.com/zephyrproject-rtos/zephyr/pull/76542 is merged, PF1550 support should be added too to allow switching IO voltage from 3v3 to 1v8 Signed-off-by: Martino Facchin <m.facchin@arduino.cc>
30 lines
876 B
C
30 lines
876 B
C
/*
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* Copyright (c) 2024 DNDG srl
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr/kernel.h>
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#include <zephyr/init.h>
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#include <stm32h7xx_ll_bus.h>
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#include <stm32h7xx_ll_gpio.h>
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static int board_gpio_hse(void)
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{
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/* The external oscillator that drives the HSE clock should be enabled
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* by setting the GPIOH1 pin. This function is registered at priority
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* RE_KERNEL_1 to be executed before the standard STM clock
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* setup code.
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*/
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LL_AHB4_GRP1_EnableClock(LL_AHB4_GRP1_PERIPH_GPIOH);
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LL_GPIO_SetPinMode(GPIOH, LL_GPIO_PIN_1, LL_GPIO_MODE_OUTPUT);
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LL_GPIO_SetPinSpeed(GPIOH, LL_GPIO_PIN_1, LL_GPIO_SPEED_FREQ_LOW);
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LL_GPIO_SetPinOutputType(GPIOH, LL_GPIO_PIN_1, LL_GPIO_OUTPUT_PUSHPULL);
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LL_GPIO_SetPinPull(GPIOH, LL_GPIO_PIN_1, LL_GPIO_PULL_UP);
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LL_GPIO_SetOutputPin(GPIOH, LL_GPIO_PIN_1);
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return 0;
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}
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SYS_INIT(board_gpio_hse, PRE_KERNEL_1, 0);
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