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2006-08-09 Kolja Waschk <waschk@telos.de>

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* clock/clock.c: New file.
This commit is contained in:
Joel Sherrill
2006-08-09 22:02:16 +00:00
parent f4786d82aa
commit 82756afce6
2 changed files with 58 additions and 0 deletions
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4
c/src/lib/libbsp/nios2/nios2_iss/ChangeLog
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@@ -1,3 +1,7 @@
2006-08-09 Kolja Waschk <waschk@telos.de>
* clock/clock.c: New file.
2005-12-12 Kolja Waschk
* derived from no_cpu BSP

54
c/src/lib/libbsp/nios2/nios2_iss/clock/clock.c Normal file
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/*
* Use SYS_CLK as system clock
*
* Copyright (c) 2005-2006 Kolja Waschk, rtemsdev/ixo.de
*
* $Id$
*/
#include <rtems.h>
#include <bsp.h>
#define CLOCK_REGS ((altera_avalon_timer_regs*)NIOS2_IO_BASE(CLOCK_BASE))
/*
* Periodic interval timer interrupt handler
*/
#define Clock_driver_support_at_tick() \
do { CLOCK_REGS->status = 0; } while(0)
/*
* Attach clock interrupt handler
*/
#define Clock_driver_support_install_isr(_new, _old) \
do { _old = (rtems_isr_entry)set_vector(_new, CLOCK_VECTOR, 1); } while(0)
/*
* Turn off the clock
*/
#define Clock_driver_support_shutdown_hardware() \
do { CLOCK_REGS->control = ALTERA_AVALON_TIMER_CONTROL_STOP_MSK; } while(0)
/*
* Set up the clock hardware
*/
void Clock_driver_support_initialize_hardware(void)
{
uint32_t period;
CLOCK_REGS->control = ALTERA_AVALON_TIMER_CONTROL_STOP_MSK;
period = (CLOCK_FREQ/1000000L)*BSP_Configuration.microseconds_per_tick - 1;
CLOCK_REGS->period_hi = period >> 16;
CLOCK_REGS->period_lo = period & 0xFFFF;
CLOCK_REGS->control = ALTERA_AVALON_TIMER_CONTROL_ITO_MSK |
ALTERA_AVALON_TIMER_CONTROL_CONT_MSK |
ALTERA_AVALON_TIMER_CONTROL_START_MSK;
NIOS2_IENABLE(1 << CLOCK_VECTOR);
}
#include "../../../shared/clockdrv_shell.c"