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https://gitlab.rtems.org/rtems/rtos/rtems.git
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2007-04-25 Ray Xu <xr@trasin.net>
* Makefile.am, configure.ac: Add lpc22xx support. * lpc22xx/clock/clockdrv.c, lpc22xx/include/lpc22xx.h, lpc22xx/irq/bsp_irq_asm.S, lpc22xx/timer/lpc_timer.h, lpc22xx/timer/timer.c: New (Initial submission).
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Ralf Corsepius committed
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@@ -1,3 +1,10 @@
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2007-04-25 Ray Xu <xr@trasin.net>
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* Makefile.am, configure.ac: Add lpc22xx support.
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* lpc22xx/clock/clockdrv.c, lpc22xx/include/lpc22xx.h,
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lpc22xx/irq/bsp_irq_asm.S, lpc22xx/timer/lpc_timer.h,
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lpc22xx/timer/timer.c: New (Initial submission).
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2007-03-12 Joel Sherrill <joel@OARcorp.com>
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* at91rm9200/clock/clock.c, at91rm9200/dbgu/dbgu.c,
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@@ -115,5 +115,31 @@ s3c2400_irq_rel_CPPFLAGS = $(AM_CPPFLAGS)
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s3c2400_irq_rel_LDFLAGS = $(RTEMS_RELLDFLAGS)
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endif
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if lpc22xx
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include_HEADERS = lpc22xx/include/lpc22xx.h
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## lpc22xx/clock
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noinst_PROGRAMS += lpc22xx/clock.rel
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lpc22xx_clock_rel_SOURCES = lpc22xx/clock/clockdrv.c
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lpc22xx_clock_rel_CPPFLAGS = $(AM_CPPFLAGS)
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lpc22xx_clock_rel_LDFLAGS = $(RTEMS_RELLDFLAGS)
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## lpc22xx/timer
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noinst_PROGRAMS += lpc22xx/timer.rel
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lpc22xx_timer_rel_SOURCES = lpc22xx/timer/timer.c
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lpc22xx_timer_rel_CPPFLAGS = $(AM_CPPFLAGS)
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lpc22xx_timer_rel_LDFLAGS = $(RTEMS_RELLDFLAGS)
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## lpc22xx/interrupt
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include_HEADERS += lpc22xx/irq/irq.h
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noinst_PROGRAMS += lpc22xx/irq.rel
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lpc22xx_irq_rel_SOURCES = lpc22xx/irq/irq.c lpc22xx/irq/bsp_irq_init.c \
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../../libbsp/arm/shared/irq/irq_init.c lpc22xx/irq/bsp_irq_asm.S \
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../../libbsp/arm/shared/irq/irq_asm.S lpc22xx/irq/irq.h
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lpc22xx_irq_rel_CPPFLAGS = $(AM_CPPFLAGS)
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lpc22xx_irq_rel_LDFLAGS = $(RTEMS_RELLDFLAGS)
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endif
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include $(srcdir)/preinstall.am
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include $(top_srcdir)/../../../automake/local.am
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@@ -27,6 +27,7 @@ AM_CONDITIONAL(shared, test "$RTEMS_CPU_MODEL" = "at91rm9200" || \
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AM_CONDITIONAL(at91rm9200, test "$RTEMS_CPU_MODEL" = "at91rm9200")
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AM_CONDITIONAL(mc9328mxl, test "$RTEMS_CPU_MODEL" = "mc9328mxl")
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AM_CONDITIONAL(s3c2400, test "$RTEMS_CPU_MODEL" = "s3c2400")
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AM_CONDITIONAL(lpc22xx, test "$RTEMS_CPU_MODEL" = "lpc22xx")
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RTEMS_AMPOLISH3
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@@ -0,0 +1,143 @@
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/*
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* LPC22XX clock specific using the System Timer
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* set the Time0
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* This is hardware specific part of the clock driver. At the end of this
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* file, the generic part of the driver is #included.
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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*
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* http://www.OARcorp.com/rtems/license.html.
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*
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*
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* clockdrv.c,v 1.1 2002/11/13 17:55:04 joel Exp
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*/
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#include <rtems.h>
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#include <bsp.h>
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#include <irq.h>
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#include <lpc22xx.h>
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#include <rtems/bspIo.h> /* for printk */
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/* this is defined in ../../../shared/clockdrv_shell.c */
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rtems_isr Clock_isr(rtems_vector_number vector);
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static void clock_isr_on(const rtems_irq_connect_data *unused);
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static void clock_isr_off(const rtems_irq_connect_data *unused);
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static int clock_isr_is_on(const rtems_irq_connect_data *irq);
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/* Replace the first value with the clock's interrupt name. */
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rtems_irq_connect_data clock_isr_data = {LPC22xx_INTERRUPT_TIMER0,
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(rtems_irq_hdl)Clock_isr,
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clock_isr_on,
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clock_isr_off,
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clock_isr_is_on,
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3, /* unused for ARM cpus */
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0 }; /* unused for ARM cpus */
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/* If you follow the code, this is never used, so any value
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* should work
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*/
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#define CLOCK_VECTOR 0
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/*use the /shared/clockdrv_shell.c code template */
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/**
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* When we get the clock interrupt
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* - clear the interrupt bit?
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* - restart the timer?
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*/
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#define Clock_driver_support_at_tick() \
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do { \
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if (!(T0IR & 0x01)) return; \
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T0IR = 0x01; \
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VICVectAddr = 0x00;\
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} while(0)
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/**
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* Installs the clock ISR. You shouldn't need to change this.
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*/
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#define Clock_driver_support_install_isr( _new, _old ) \
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do { \
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(_old) = NULL; \
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BSP_install_rtems_irq_handler(&clock_isr_data); \
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} while(0)
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/**
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* Initialize the hardware for the clock
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* - Set the frequency
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* - enable it
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* - clear any pending interrupts
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*
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* Since you may want the clock always running, you can
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* enable interrupts here. If you do so, the clock_isr_on(),
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* clock_isr_off(), and clock_isr_is_on() functions can be
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* NOPs.
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*/
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/* set timer to generate interrupt every BSP_Configuration.microseconds_per_tick */
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/* MR0/(LPC22xx_Fpclk/(PR0+1)) = 10/1000 = 0.01s */
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#define Clock_driver_support_initialize_hardware() \
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do { \
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T0TCR &= 0; /* disable and clear timer 0, set to */ \
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T0PC = 0; /* TC is incrementet on every pclk.*/ \
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T0MR0 = ((LPC22xx_Fpclk/1000* BSP_Configuration.microseconds_per_tick) / 1000); /* initialize the timer period and prescaler */ \
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/*T0PR = (((LPC22xx_Fpclk / 1000) * BSP_Configuration.microseconds_per_tick) / 1000-1); \ */ \
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T0MCR |= 0x03; /* generate interrupt when T0MR0 match T0TC and Reset Timer Count*/ \
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T0EMR = 0; /*No external match*/ \
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T0TCR = 1; /*enable timer0*/ \
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} while (0)
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/**
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* Do whatever you need to shut the clock down and remove the
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* interrupt handler. Since this normally only gets called on
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* RTEMS shutdown, you may not need to do anything other than
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* remove the ISR.
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*/
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#define Clock_driver_support_shutdown_hardware() \
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do { \
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/* Disable timer */ \
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T0TCR&=~0x02; \
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BSP_remove_rtems_irq_handler(&clock_isr_data); \
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} while (0)
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/**
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* Enables clock interrupt.
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*
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* If the interrupt is always on, this can be a NOP.
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*/
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static void clock_isr_on(const rtems_irq_connect_data *unused)
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{
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T0IR&=0x01;
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//return;
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}
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/**
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* Disables clock interrupts
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*
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* If the interrupt is always on, this can be a NOP.
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*/
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static void clock_isr_off(const rtems_irq_connect_data *unused)
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{
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T0IR=0x00;
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//return;
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}
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/**
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* Tests to see if clock interrupt is enabled, and returns 1 if so.
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* If interrupt is not enabled, returns 0.
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*
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* If the interrupt is always on, this always returns 1.
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*/
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static int clock_isr_is_on(const rtems_irq_connect_data *irq)
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{
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return T0IR & 0x01; /*MR0 mask*/
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}
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/* Make sure to include this, and only at the end of the file */
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#include "../../../../libbsp/shared/clockdrv_shell.c"
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File diff suppressed because it is too large.
Load diff
@@ -0,0 +1,48 @@
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/*
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* LPC22XX Intererrupt handler
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*
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* Copyright (c) 2002 by Jay Monkman <jtm@lopingdog.com>
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*
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* Modified by ray
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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*
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* http://www.OARcorp.com/rtems/license.html.
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*
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*
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* bsp_irq_asm.S,v 1.1 2002/11/13 17:55:06 joel Exp
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*/
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#define __asm__
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/*
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* BSP specific interrupt handler for INT or FIQ. In here
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* you do determine which interrupt happened and call its
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* handler.
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*/
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.globl ExecuteITHandler
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ExecuteITHandler :
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/*
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* Look at interrupt status register to determine source.
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* From source, determine offset into expanded vector table
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* and load handler address into r0.
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*/
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ldr r0, =0xFFFFF030 /* Read the vector number */
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ldr r1, [r0]
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/* find the ISR's address based on the vector VICVectAddr0 */
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/*ldr r0, =0xFFFFF100*/
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/*ldr r0, [r0, r1, LSL #2]*/ /* Read the address */
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stmdb sp!,{lr}
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ldr lr, =IRQ_return /* prepare the return from handler */
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mov pc, r1 /* EXECUTE INT HANDLER */
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IRQ_return:
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ldmia sp!,{lr}
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mov pc, lr
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@@ -0,0 +1,48 @@
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#ifndef __LPC_TIMER_H
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#define __LPC_TIMER_H
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/*************************************************************************
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*
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* File name : Timer.h
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*
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**************************************************************************/
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/* Timer Control register bit descriptions */
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#define TCR_ENABLE_BIT 0
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#define TCR_RESET_BIT 1
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// The channel name which is used in matching, in fact they represent
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// corresponding Match Register
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#define CH_MAXNUM 4
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#define CH0 0
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#define CH1 1
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#define CH2 2
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#define CH3 3
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// The channel name which is used in capturing, in fact they represent
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// corresponding Capture Register
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#define CPCH_MAXNUM 4
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#define CPCH0 0
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#define CPCH1 1
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#define CPCH2 2
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#define CPCH3 3
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//The actions when matching
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#define TimerAction_Interrupt 0x1
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#define TimerAction_ResetTimer 0x2
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#define TimerAction_StopTimer 0x4
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//Interrupt source type
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#define TIMERMR0Int 0x01
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#define TIMERMR1Int 0x02
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#define TIMERMR2Int 0x04
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#define TIMERMR3Int 0x08
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#define TIMERCR0Int 0x10
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#define TIMERCR1Int 0x20
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#define TIMERCR2Int 0x40
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#define TIMERCR3Int 0x80
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#define TIMERALLInt 0xFF
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#endif //__LPC_Timer_H
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@@ -0,0 +1,115 @@
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/*
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* RTL22xx board Timer driver
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*
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* This uses Timer1 for timing measurments.
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*
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* By Ray xu, modify form Mc9328mxl RTEMS DSP
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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*
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* http://www.OARcorp.com/rtems/license.html.
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*
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* Notes:
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* This file manages the benchmark timer used by the RTEMS Timing Test
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* Suite. Each measured time period is demarcated by calls to
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* Timer_initialize() and Read_timer(). Read_timer() usually returns
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* the number of microseconds since Timer_initialize() exitted.
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*
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* It is important that the timer start/stop overhead be determined
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* when porting or modifying this code.
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*
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* timer.c,v 1.1 2002/11/13 17:55:09 joel Exp
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*/
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#include <rtems.h>
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#include <bsp.h>
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#include <lpc22xx.h>
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#include "lpc_timer.h"
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uint32_t g_start;
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uint32_t g_freq;
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#ifndef __cplusplus
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#define bool int
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#define true 1
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#define false 0
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#endif/* __cplusplus */
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rtems_boolean Timer_driver_Find_average_overhead;
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/*
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* Set up Timer 1
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*/
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void Timer_initialize( void )
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{
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T1TCR &= 0; /* disable and clear timer 0 */
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g_start = (T1TC/(LPC22xx_Fpclk/1000000));
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T1PC = 0; /* TC is incrementet on every pclk.*/
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T1MR0 = ((LPC22xx_Fpclk/1000* BSP_Configuration.microseconds_per_tick) / 1000); /* initialize the timer period and prescaler */
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T1EMR = 0; /*No external match*/
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T1TCR = 1; /*enable timer1*/
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g_freq = LPC22xx_Fpclk / 1000;
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}
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/*
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* The following controls the behavior of Read_timer().
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*
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* AVG_OVEREHAD is the overhead for starting and stopping the timer. It
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* is usually deducted from the number returned.
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*
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* LEAST_VALID is the lowest number this routine should trust. Numbers
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* below this are "noise" and zero is returned.
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*/
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#define AVG_OVERHEAD 0 /* It typically takes X.X microseconds */
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/* (Y countdowns) to start/stop the timer. */
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/* This value is in microseconds. */
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#define LEAST_VALID 1 /* Don't trust a clicks value lower than this */
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int Read_timer( void )
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{
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uint32_t t;
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unsigned long long total;
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t = (T1TC/(LPC22xx_Fpclk/1000000));
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/*
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* Total is calculated by taking into account the number of timer overflow
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* interrupts since the timer was initialized and clicks since the last
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* interrupts. currently it is not supported
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*/
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total = (t - g_start);
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/* convert to nanoseconds */
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if ( Timer_driver_Find_average_overhead == 1 ) {
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return (int) total;
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} else if ( total < LEAST_VALID ) {
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return 0;
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}
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/*
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* Somehow convert total into microseconds
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*/
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return (total - AVG_OVERHEAD);
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}
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/*
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* Empty function call used in loops to measure basic cost of looping
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* in Timing Test Suite.
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*/
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rtems_status_code Empty_function( void )
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{
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return RTEMS_SUCCESSFUL;
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}
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void Set_find_average_overhead(
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rtems_boolean find_flag
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)
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{
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Timer_driver_Find_average_overhead = find_flag;
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}
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||||
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