mcf5235/btimer/btimer.c

0001 /*
0002  *  Timer Init
0003  *
0004  *  Use the last DMA timer (DTIM3) as the diagnostic timer.
0005  */
0006
0007 #include <rtems.h>
0008 #include <rtems/btimer.h>
0009 #include <bsp.h>
0010
0011 void
0012 benchmark_timer_initialize(void)
0013 {
0014     int preScaleDivisor = 0x4A;
0015     int div = MCF5235_TIMER_DTMR_CLK_DIV1;
0016     MCF5235_TIMER_DTRR3 = 0x2710;
0017     MCF5235_TIMER3_DTMR = 0;
0018     MCF5235_TIMER3_DTMR = MCF5235_TIMER_DTMR_PS(preScaleDivisor) | div |
0019                           MCF5235_TIMER_DTMR_RST;
0020 }
0021
0022 /*
0023  * Return timer value in microsecond units
0024  */
0025 uint32_t
0026 benchmark_timer_read(void)
0027 {
0028     return MCF5235_TIMER3_DTCN;
0029 }
0030
0031 void
0032 benchmark_timer_disable_subtracting_average_overhead(bool find_flag)
0033 {
0034 }