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@@ -0,0 +1,14 @@
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+#include "all-headers.h"
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+
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+void startSystick (void) {
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+ SYST_RVR = CPU_MHZ * 1000 - 1 ; // Underflow every ms
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+ SYST_CVR = 0 ;
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+ SYST_CSR = SYST_CSR_CLKSOURCE | SYST_CSR_ENABLE ;
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+}
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+
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+oid busyWaitDuring (const uint32_t inDelayMS) {
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+ const uint32_t COUNTFLAG_MASK = 1 << 16 ;
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+ for (uint32_t i = 0; i < inDelayMS; i++) {
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+ while ((SYST_CSR & COUNTFLAG_MASK) == 0) {} // Busy wait, polling COUNTFLAG
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+ }
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+}
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