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| author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2012-04-02 11:32:11 +0200 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2012-04-02 13:40:15 +0200 |
| commit | 8bb00ace5090804804f6011a02e097176fa63bb8 (patch) | |
| tree | 53efdb2189daab1802eb62a11f879ce787ddf03c /c/src/lib/libbsp/powerpc/mpc8260ads/startup/bspstart.c | |
| parent | bsp/gen83xx: Support cache BSP options (diff) | |
| download | rtems-8bb00ace5090804804f6011a02e097176fa63bb8.tar.bz2 | |
bsps: More accurate PowerPC clock driver
The clock driver used previously the bsp_clicks_per_usec value. For a
33333333Hz time base frequency this leads to a relative error of one per
cent for example due to integer truncation.
Diffstat (limited to 'c/src/lib/libbsp/powerpc/mpc8260ads/startup/bspstart.c')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/mpc8260ads/startup/bspstart.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/powerpc/mpc8260ads/startup/bspstart.c b/c/src/lib/libbsp/powerpc/mpc8260ads/startup/bspstart.c index 17520a9a4c..e6b0e60f6b 100644 --- a/c/src/lib/libbsp/powerpc/mpc8260ads/startup/bspstart.c +++ b/c/src/lib/libbsp/powerpc/mpc8260ads/startup/bspstart.c @@ -58,6 +58,7 @@ SPR_RW(SPRG1) * Driver configuration parameters */ uint32_t bsp_clock_speed; +uint32_t bsp_time_base_frequency; uint32_t bsp_clicks_per_usec; uint32_t bsp_serial_per_sec; /* Serial clocks per second */ bool bsp_serial_external_clock; @@ -207,6 +208,7 @@ void bsp_start(void) /* * initialize the device driver parameters */ + bsp_time_base_frequency = 10000000; bsp_clicks_per_usec = 10; /* for 40MHz extclk */ bsp_serial_per_sec = 40000000; bsp_serial_external_clock = 0; |