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- /*
- * (c) danielinux 2019
- *
- * GPLv.2
- *
- * See LICENSE for details
- */
- #include "system.h"
- #include "systick.h"
- #include <stdint.h>
- /*** SYSTICK ***/
- #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 = ((cpu_freq / 1000) - 1);
- SYSTICK_CVR = 0;
- SYSTICK_CSR |= 0x07;
- }
- void systick_disable(void)
- {
- SYSTICK_CSR &= ~1;
- }
- void isr_systick(void)
- {
- ++jiffies;
- }
- uint32_t HAL_GetTick(void)
- {
- return jiffies;
- }
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