initial commit!

libs/libgccvb/timer.c

@@ -0,0 +1,48 @@
+#include "types.h"
+#include "hw.h"
+#include "timer.h"
+
+
+u8 tcr_val = 0;
+
+void timer_enable(int enb) 
+{
+	if (enb) tcr_val |= TIMER_ENB;
+	else tcr_val &= ~TIMER_ENB;
+	HW_REGS[TCR] = tcr_val;
+}
+
+u16 timer_get() 
+{
+	return (HW_REGS[TLR] | (HW_REGS[THR] << 8));
+}
+
+void timer_set(u16 time) 
+{
+	HW_REGS[TLR] = (time & 0xFF);
+	HW_REGS[THR] = (time >> 8);
+}
+
+void timer_freq(int freq) 
+{
+	if (freq) tcr_val |= TIMER_20US;
+	else tcr_val &= ~TIMER_20US;
+	HW_REGS[TCR] = tcr_val;
+}
+
+void timer_int(int enb) 
+{
+	if (enb) tcr_val |= TIMER_INT;
+	else tcr_val &= ~TIMER_INT;
+	HW_REGS[TCR] = tcr_val;
+}
+
+int timer_getstat() 
+{
+	return (!!(HW_REGS[TCR] & TIMER_ZSTAT));
+}
+
+void timer_clearstat() 
+{
+	HW_REGS[TCR] = (tcr_val|TIMER_ZCLR);
+}