mirror of https://github.com/wolfSSL/wolfBoot.git
74 lines
2.5 KiB
C
74 lines
2.5 KiB
C
/* led.c
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*
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* Test bare-metal blinking led application
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*
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* Copyright (C) 2018 wolfSSL Inc.
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*
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* This file is part of wolfBoot.
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*
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* wolfBoot is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* wolfBoot is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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*/
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#ifdef PLATFORM_stm32f4
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#include <stdint.h>
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#include "wolfboot/wolfboot.h"
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#define AHB1_CLOCK_ER (*(volatile uint32_t *)(0x40023830))
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#define GPIOD_AHB1_CLOCK_ER (1 << 3)
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#define GPIOD_BASE 0x40020c00
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#define GPIOD_MODE (*(volatile uint32_t *)(GPIOD_BASE + 0x00))
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#define GPIOD_OTYPE (*(volatile uint32_t *)(GPIOD_BASE + 0x04))
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#define GPIOD_OSPD (*(volatile uint32_t *)(GPIOD_BASE + 0x08))
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#define GPIOD_PUPD (*(volatile uint32_t *)(GPIOD_BASE + 0x0c))
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#define GPIOD_ODR (*(volatile uint32_t *)(GPIOD_BASE + 0x14))
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#define GPIOD_BSRR (*(volatile uint32_t *)(GPIOD_BASE + 0x18))
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#define GPIOD_AFL (*(volatile uint32_t *)(GPIOD_BASE + 0x20))
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#define GPIOD_AFH (*(volatile uint32_t *)(GPIOD_BASE + 0x24))
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#define LED_PIN (15)
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#define LED_BOOT_PIN (14)
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#define GPIO_OSPEED_100MHZ (0x03)
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void led_pwm_setup(void)
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{
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uint32_t reg;
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AHB1_CLOCK_ER |= GPIOD_AHB1_CLOCK_ER;
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reg = GPIOD_MODE & ~ (0x03 << (LED_PIN * 2));
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GPIOD_MODE = reg | (2 << (LED_PIN * 2));
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reg = GPIOD_OSPD & ~(0x03 << (LED_PIN * 2));
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GPIOD_OSPD = reg | (0x03 << (LED_PIN * 2));
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reg = GPIOD_PUPD & ~(0x03 << (LED_PIN * 2));
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GPIOD_PUPD = reg | (0x02 << (LED_PIN * 2));
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/* Alternate function: use high pin */
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reg = GPIOD_AFH & ~(0xf << ((LED_PIN - 8) * 4));
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GPIOD_AFH = reg | (0x2 << ((LED_PIN - 8) * 4));
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}
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void boot_led_on(void)
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{
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uint32_t reg;
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uint32_t pin = LED_BOOT_PIN - 2 * (wolfBoot_current_firmware_version() & 0x01);
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AHB1_CLOCK_ER |= GPIOD_AHB1_CLOCK_ER;
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reg = GPIOD_MODE & ~(0x03 << (pin * 2));
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GPIOD_MODE = reg | (1 << (pin * 2));
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reg = GPIOD_PUPD & ~(0x03 << (pin * 2));
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GPIOD_PUPD = reg | (1 << (pin * 2));
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GPIOD_BSRR |= (1 << pin);
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}
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#endif /** PLATFORM_stm32f4 **/
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