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ssp clock delta

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This commit is contained in:
iceman1001 2019-09-11 15:16:20 +02:00
parent df2c294cac
commit ff66ea896b
2 changed files with 8 additions and 0 deletions
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7
armsrc/ticks.c
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@ -185,6 +185,13 @@ uint32_t RAMFUNC GetCountSspClk(void) {
return tmp_count; return tmp_count;
} }
uint32_t RAMFUNC GetCountSspClkDelta(uint32_t start) {
uint32_t stop = GetCountSspClk();
if ( stop >= start )
return stop - start;
return (UINT32_MAX - start) + stop;
}
// ------------------------------------------------------------------------- // -------------------------------------------------------------------------
// Timer for bitbanging, or LF stuff when you need a very precis timer // Timer for bitbanging, or LF stuff when you need a very precis timer
// 1us = 1.5ticks // 1us = 1.5ticks

1
armsrc/ticks.h
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@ -33,6 +33,7 @@ void SpinDelayCountUs(uint32_t us);
void StartCountSspClk(); void StartCountSspClk();
void ResetSspClk(void); void ResetSspClk(void);
uint32_t RAMFUNC GetCountSspClk(); uint32_t RAMFUNC GetCountSspClk();
uint32_t RAMFUNC GetCountSspClkDelta();
void StartTicks(void); void StartTicks(void);
uint32_t GetTicks(void); uint32_t GetTicks(void);