/* * Use SYS_CLK as system clock * * Copyright (c) 2005-2006 Kolja Waschk, rtemsdev/ixo.de */ #include #include #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) \ set_vector(_new, CLOCK_VECTOR, 1) /* * 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 */ static void Clock_driver_support_initialize_hardware(void) { uint32_t period; CLOCK_REGS->control = ALTERA_AVALON_TIMER_CONTROL_STOP_MSK; period = (CLOCK_FREQ/1000000L)*rtems_configuration_get_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); } #define CLOCK_DRIVER_USE_DUMMY_TIMECOUNTER #include "../../../shared/dev/clock/clockimpl.h"