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39 lines
2.0 KiB
39 lines
2.0 KiB
9 years ago
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;********************************************************************************
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; SOUBOR : INI_BITS_SYSTICK.S
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; AUTOR : Petr Dousa, Ondrej Hruska
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; DATUM : 10/2015
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; POPIS : Bitove masky ridicich registru pro SYSTICK (casovac pro RTOS)
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;
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; Toto je soucast knihovny pro STM32L100 vyvijene na Katedre mereni FEL CVUT.
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;********************************************************************************
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;****************************************************************************
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;
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; SystemTick (SysTick)
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;
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;****************************************************************************
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;**************** Bit definition for SysTick_CSR register ****************
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SysTick_CSR_ENABLE EQU 0x00000001 ; Counter enable
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SysTick_CSR_TICKINT EQU 0x00000002 ; Enable interrupt when counter reaches zero
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SysTick_CSR_CLKSOURCE EQU 0x00000004 ; Clock source (0 - external, 1 - core clock)
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SysTick_CSR_CLKSOURCE_CORE EQU 0x00000004 ; Clock source - core clock
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SysTick_CSR_CLKSOURCE_DIV8 EQU 0x00000000 ; Clock source - core clock / 8
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SysTick_CSR_COUNTFLAG EQU 0x00010000 ; Count Flag (only if interrupt is disabled)
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;**************** Bit definition for SysTick_LOAD register ****************
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SysTick_RELOAD_MASK EQU 0x00FFFFFF ; Value to load into the SysTick Current Value Register when the counter reaches 0
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;**************** Bit definition for SysTick_VAL register *****************
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SysTick_VAL_MASK EQU 0x00FFFFFF ; Current value at the time the register is accessed
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;**************** Bit definition for SysTick_CALIB register ***************
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SysTick_CALIB_TENMS EQU 0x00FFFFFF ; Reload value to use for 10ms timing
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SysTick_CALIB_SKEW EQU 0x40000000 ; Calibration value is not exactly 10 ms
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SysTick_CALIB_NOREF EQU 0x80000000 ; The reference clock is not provided
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END
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