diff options
| author | Joel Sherrill <joel.sherrill@OARcorp.com> | 2007-05-01 19:16:04 +0000 |
|---|---|---|
| committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 2007-05-01 19:16:04 +0000 |
| commit | 716f6bede98614f69a223f9eac9acd14efbbf563 (patch) | |
| tree | d1006d839e9cc9cfb5d42a4f5521ae18189c7a32 /c/src/lib/libcpu/arm/lpc22xx/clock/clockdrv.c | |
| parent | 2007-05-01 Ray Xu <xr@trasin.net> (diff) | |
| download | rtems-716f6bede98614f69a223f9eac9acd14efbbf563.tar.bz2 | |
2007-05-01 Ray Xu <xr@trasin.net>
* lpc22xx/clock/clockdrv.c, lpc22xx/include/lpc22xx.h,
lpc22xx/irq/bsp_irq_asm.S, lpc22xx/irq/bsp_irq_init.c,
lpc22xx/irq/irq.c, lpc22xx/irq/irq.h, lpc22xx/timer/timer.c: Update
BSP to address changes between 4.7 and CVS head as well as to address
comments from Ralf and Joel.
Diffstat (limited to 'c/src/lib/libcpu/arm/lpc22xx/clock/clockdrv.c')
| -rw-r--r-- | c/src/lib/libcpu/arm/lpc22xx/clock/clockdrv.c | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/c/src/lib/libcpu/arm/lpc22xx/clock/clockdrv.c b/c/src/lib/libcpu/arm/lpc22xx/clock/clockdrv.c index b486b09b8c..ef3e847731 100644 --- a/c/src/lib/libcpu/arm/lpc22xx/clock/clockdrv.c +++ b/c/src/lib/libcpu/arm/lpc22xx/clock/clockdrv.c @@ -1,6 +1,8 @@ /* - * LPC22XX clock specific using the System Timer - * set the Time0 + * LPC22XX/LPC21xx clock specific using the System Timer + * Copyright (c) 2006 by Ray <rayx.cn@gmail.com> + * Set the Time0 to generate click for RTEMS + * * This is hardware specific part of the clock driver. At the end of this * file, the generic part of the driver is #included. * @@ -76,9 +78,9 @@ rtems_irq_connect_data clock_isr_data = {LPC22xx_INTERRUPT_TIMER0, * NOPs. */ - /* set timer to generate interrupt every BSP_Configuration.microseconds_per_tick */ - /* MR0/(LPC22xx_Fpclk/(PR0+1)) = 10/1000 = 0.01s */ - + /* set timer to generate interrupt every BSP_Configuration.microseconds_per_tick + * MR0/(LPC22xx_Fpclk/(PR0+1)) = 10/1000 = 0.01s + */ #define Clock_driver_support_initialize_hardware() \ do { \ @@ -104,6 +106,19 @@ rtems_irq_connect_data clock_isr_data = {LPC22xx_INTERRUPT_TIMER0, BSP_remove_rtems_irq_handler(&clock_isr_data); \ } while (0) +uint32_t bsp_clock_nanoseconds_since_last_tick(void) +{ + uint32_t clicks; + + clicks = T0TC; /*T0TC is the 32bit time counter 0*/ + + return (uint32_t) (BSP_Configuration.microseconds_per_tick - clicks) * 1000; +} + +#define Clock_driver_nanoseconds_since_last_tick bsp_clock_nanoseconds_since_last_tick + + + /** * Enables clock interrupt. * |