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- /*
- * Copyright (C) 2023 Daniele Lacamera <root@danielinux.net>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
- #include "systick.h"
- #include "task.h"
- #include <stdint.h>
- /*** SYSTICK ***/
- volatile uint32_t SystemCoreClock = 216000000;
- #define SYSTICK_BASE (0xE000E010)
- #define SYSTICK_CSR (*(volatile uint32_t *)(SYSTICK_BASE + 0x00))
- #define SYSTICK_RVR (*(volatile uint32_t *)(SYSTICK_BASE + 0x04))
- #define SYSTICK_CVR (*(volatile uint32_t *)(SYSTICK_BASE + 0x08))
- #define SYSTICK_CALIB (*(volatile uint32_t *)(SYSTICK_BASE + 0x0C))
- volatile unsigned int jiffies = 0;
- void systick_enable(void)
- {
- SYSTICK_RVR = ((SystemCoreClock / 1000) - 1);
- SYSTICK_CVR = 0;
- SYSTICK_CSR |= 0x07;
- }
- void systick_disable(void)
- {
- SYSTICK_CSR &= ~1;
- }
- void isr_systick(void)
- {
- ++jiffies;
- trigger_event(EV_SYSTICK);
- }
- uint32_t HAL_GetTick(void)
- {
- return jiffies;
- }
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