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[CM3] Systick Add helper function to easily set the desired frequency

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This commit is contained in:
Frantisek Burian
2013-09-11 06:05:48 -07:00
committed by Piotr Esden-Tempski
parent 52758bb8fd
commit d541c14110
2 changed files with 37 additions and 2 deletions
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8
include/libopencm3/cm3/systick.h
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@@ -85,8 +85,11 @@
#define STK_CSR_CLKSOURCE_EXT (0 << STK_CSR_CLKSOURCE_LSB)
#define STK_CSR_CLKSOURCE_AHB (1 << STK_CSR_CLKSOURCE_LSB)
#else
#define STK_CTRL_CLKSOURCE_AHB_DIV8 (0 << STK_CTRL_CLKSOURCE_LSB)
#define STK_CTRL_CLKSOURCE_AHB (1 << STK_CTRL_CLKSOURCE_LSB)
#define STK_CTRL_CLKSOURCE_AHB_DIV8 (0 << STK_CSR_CLKSOURCE_LSB)
#define STK_CTRL_CLKSOURCE_AHB (1 << STK_CSR_CLKSOURCE_LSB)
#define STK_CSR_CLKSOURCE_AHB_DIV8 (0 << STK_CSR_CLKSOURCE_LSB)
#define STK_CSR_CLKSOURCE_AHB (1 << STK_CSR_CLKSOURCE_LSB)
#endif
/**@}*/
@@ -123,6 +126,7 @@
BEGIN_DECLS
void systick_set_reload(uint32_t value);
bool systick_set_frequency(uint32_t freq, uint32_t ahb);
uint32_t systick_get_reload(void);
uint32_t systick_get_value(void);
void systick_set_clocksource(uint8_t clocksource);