git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@193 35acf78f-673a-0410-8e92-d51de3d6d3f4
gdisirio
parent
fd63d45d5f
commit
53b6f6d8df
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@ -68,6 +68,7 @@ ASRC = ../../ports/ARM7-LPC214x/GCC/chcore.c \
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../../src/chevents.c ../../src/chmsg.c ../../src/chsleep.c ../../src/chqueues.c \
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../../src/chserial.c \
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../../src/lib/evtimer.c ../../test/test.c \
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at91lib\aic.c \
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board.c main.c
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# List THUMB-mode C sources here
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@ -0,0 +1,84 @@
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/* ----------------------------------------------------------------------------
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* ATMEL Microcontroller Software Support - ROUSSET -
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* ----------------------------------------------------------------------------
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* Copyright (c) 2006, Atmel Corporation
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the disclaiimer below.
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*
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the disclaimer below in the documentation and/or
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* other materials provided with the distribution.
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*
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* Atmel's name may not be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
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* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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* ----------------------------------------------------------------------------
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*/
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//------------------------------------------------------------------------------
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// Headers
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//------------------------------------------------------------------------------
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#include "aic.h"
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#include <board.h>
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//------------------------------------------------------------------------------
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// Exported functions
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//------------------------------------------------------------------------------
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//------------------------------------------------------------------------------
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/// Configures the interrupt associated with the given source, using the
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/// specified mode and interrupt handler.
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/// \param source Interrupt source to configure.
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/// \param mode Triggering mode of the interrupt.
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/// \param handler Interrupt handler function.
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//------------------------------------------------------------------------------
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void AIC_ConfigureIT(unsigned int source,
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unsigned int mode,
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void (*handler)( void ))
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{
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// Disable the interrupt first
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AT91C_BASE_AIC->AIC_IDCR = 1 << source;
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// Configure mode and handler
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AT91C_BASE_AIC->AIC_SMR[source] = mode;
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AT91C_BASE_AIC->AIC_SVR[source] = (unsigned int) handler;
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// Clear interrupt
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AT91C_BASE_AIC->AIC_ICCR = 1 << source;
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}
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//------------------------------------------------------------------------------
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/// Enables interrupts coming from the given (unique) source.
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/// \param source Interrupt source to enable.
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//------------------------------------------------------------------------------
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void AIC_EnableIT(unsigned int source)
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{
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AT91C_BASE_AIC->AIC_IECR = 1 << source;
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}
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//------------------------------------------------------------------------------
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/// Disables interrupts coming from the given (unique) source.
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/// \param source Interrupt source to enable.
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//------------------------------------------------------------------------------
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void AIC_DisableIT(unsigned int source)
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{
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AT91C_BASE_AIC->AIC_IDCR = 1 << source;
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}
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@ -0,0 +1,78 @@
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/* ----------------------------------------------------------------------------
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* ATMEL Microcontroller Software Support - ROUSSET -
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* ----------------------------------------------------------------------------
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* Copyright (c) 2006, Atmel Corporation
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the disclaiimer below.
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*
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the disclaimer below in the documentation and/or
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* other materials provided with the distribution.
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*
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* Atmel's name may not be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
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* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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* ----------------------------------------------------------------------------
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*/
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//------------------------------------------------------------------------------
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/// \dir
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/// !Purpose
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///
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/// Methods and definitions for configuring interrupts using the Advanced
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/// Interrupt Controller (AIC).
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///
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/// !Usage
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/// -# Configure an interrupt source using AIC_ConfigureIT
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/// -# Enable or disable interrupt generation of a particular source with
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/// AIC_EnableIT and AIC_DisableIT.
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//------------------------------------------------------------------------------
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#ifndef AIC_H
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#define AIC_H
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//------------------------------------------------------------------------------
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// Headers
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//------------------------------------------------------------------------------
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#include <board.h>
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//------------------------------------------------------------------------------
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// Definitions
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//------------------------------------------------------------------------------
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#ifndef AT91C_AIC_SRCTYPE_INT_HIGH_LEVEL
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/// Redefinition of missing constant.
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#define AT91C_AIC_SRCTYPE_INT_HIGH_LEVEL AT91C_AIC_SRCTYPE_INT_LEVEL_SENSITIVE
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#endif
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//------------------------------------------------------------------------------
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// Global functions
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//------------------------------------------------------------------------------
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extern void AIC_ConfigureIT(unsigned int source,
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unsigned int mode,
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void (*handler)( void ));
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extern void AIC_EnableIT(unsigned int source);
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extern void AIC_DisableIT(unsigned int source);
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#endif //#ifndef AIC_H
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@ -19,7 +19,8 @@
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#include <ch.h>
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#include "at91lib/AT91SAM7X256.h"
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#include "board.h"
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#include "at91lib/aic.h"
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extern void FiqHandler(void);
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@ -29,10 +30,24 @@ static void SpuriousHandler(void) {
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AT91C_BASE_AIC->AIC_EOICR = (AT91_REG)AT91C_BASE_AIC;
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}
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/*
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* Timer 0 IRQ handling here.
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*/
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__attribute__((naked))
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static void SYSIrqHandler(void) {
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chSysIRQEnterI();
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if (AT91C_BASE_PITC->PITC_PISR & AT91C_PITC_PITS) {
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chSysTimerHandlerI();
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(void) AT91C_BASE_PITC->PITC_PIVR;
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}
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chSysIRQExitI();
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}
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void hwinit(void) {
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int i;
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AT91PS_PMC pmcp = AT91C_BASE_PMC;
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AT91PS_AIC aicp = AT91C_BASE_AIC;
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/*
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* Flash Memory: 1 wait state, about 50 cycles in a microsecond.
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@ -47,40 +62,71 @@ void hwinit(void) {
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/*
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* Enables the main oscillator and waits 56 slow cycles as startup time.
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*/
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pmcp->PMC_MOR = (AT91C_CKGR_OSCOUNT & (7 << 8)) | AT91C_CKGR_MOSCEN;
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while (!(pmcp->PMC_SR & AT91C_PMC_MOSCS))
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AT91C_BASE_PMC->PMC_MOR = (AT91C_CKGR_OSCOUNT & (7 << 8)) | AT91C_CKGR_MOSCEN;
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while (!(AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MOSCS))
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;
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/*
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* PLL setup: DIV = 14, MUL = 72, PLLCOUNT = 10
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* PLLfreq = 96109714 Hz (rounded)
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*/
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pmcp->PMC_PLLR = (AT91C_CKGR_DIV & 14) |
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(AT91C_CKGR_PLLCOUNT & (10 << 8)) |
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(AT91C_CKGR_MUL & (72 << 16));
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while (!(pmcp->PMC_SR & (AT91C_PMC_LOCK)))
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AT91C_BASE_PMC->PMC_PLLR = (AT91C_CKGR_DIV & 14) |
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(AT91C_CKGR_PLLCOUNT & (10 << 8)) |
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(AT91C_CKGR_MUL & (72 << 16));
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while (!(AT91C_BASE_PMC->PMC_SR & AT91C_PMC_LOCK))
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;
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/*
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* Master clock = PLLfreq / 2 = 48054858 Hz (rounded)
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*/
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pmcp->PMC_MCKR = AT91C_PMC_CSS_PLL_CLK | AT91C_PMC_PRES_CLK_2;
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while (!(pmcp->PMC_SR & (AT91C_PMC_MCKRDY)))
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AT91C_BASE_PMC->PMC_MCKR = AT91C_PMC_CSS_PLL_CLK | AT91C_PMC_PRES_CLK_2;
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while (!(AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY))
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;
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/*
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* Default AIC setup, the device drivers will modify it as needed.
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*/
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aicp->AIC_SVR[0] = (AT91_REG)FiqHandler;
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for (i = 1; i < 31; i++) {
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aicp->AIC_SVR[i] = (AT91_REG)NULL;
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aicp->AIC_EOICR = (AT91_REG)i;
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}
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aicp->AIC_SPU = (AT91_REG)SpuriousHandler;
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/*
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* I/O setup, enable clocks, initially all pins are inputs with pullups.
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*/
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pmcp->PMC_PCER = (1 << AT91C_ID_PIOA) | (1 << AT91C_ID_PIOB);
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AT91C_BASE_PMC->PMC_PCER = (1 << AT91C_ID_PIOA) | (1 << AT91C_ID_PIOB);
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AT91C_BASE_PIOA->PIO_PER = 0xFFFFFFFF;
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AT91C_BASE_PIOB->PIO_PER = 0xFFFFFFFF;
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/*
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* Default AIC setup, the device drivers will modify it as needed.
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*/
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AT91C_BASE_AIC->AIC_ICCR = 0xFFFFFFFF;
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AT91C_BASE_AIC->AIC_SVR[0] = (AT91_REG)FiqHandler;
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for (i = 1; i < 31; i++) {
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AT91C_BASE_AIC->AIC_SVR[i] = (AT91_REG)NULL;
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AT91C_BASE_AIC->AIC_EOICR = (AT91_REG)i;
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}
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AT91C_BASE_AIC->AIC_SPU = (AT91_REG)SpuriousHandler;
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/*
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* LCD pins setup.
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*/
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AT91C_BASE_PIOB->PIO_SODR = PIOB_LCD_BL; // Set to high.
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AT91C_BASE_PIOB->PIO_OER = PIOB_LCD_BL; // Configure as output.
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AT91C_BASE_SYS->PIOA_PPUDR = PIOB_LCD_BL; // Disable internal pullup resistor.
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AT91C_BASE_PIOA->PIO_SODR = PIOA_LCD_RESET; // Set to high.
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AT91C_BASE_PIOA->PIO_OER = PIOA_LCD_RESET; // Configure as output.
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AT91C_BASE_SYS->PIOB_PPUDR = PIOA_LCD_RESET; // Disable internal pullup resistor.
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/*
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* Joystick and buttons, disable pullups, already inputs.
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*/
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AT91C_BASE_SYS->PIOA_PPUDR = PIOA_B1 | PIOA_B2 | PIOA_B3 | PIOA_B4 | PIOA_B5;
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AT91C_BASE_SYS->PIOB_PPUDR = PIOB_SW1 | PIOB_SW2;
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/*
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* MMC/SD slot, disable pullups, already inputs.
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*/
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AT91C_BASE_SYS->PIOB_PPUDR = PIOB_MMC_WP | PIOB_MMC_CP;
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/*
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* PIT Initialization.
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*/
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AIC_ConfigureIT(AT91C_ID_SYS, AT91C_AIC_SRCTYPE_POSITIVE_EDGE, SYSIrqHandler);
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AT91C_BASE_PITC->PITC_PIMR = (MCK / 16 / CH_FREQUENCY) - 1;
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AT91C_BASE_PITC->PITC_PIMR |= AT91C_PITC_PITEN | AT91C_PITC_PITIEN;
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}
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@ -20,7 +20,42 @@
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#ifndef _BOARD_H_
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#define _BOARD_H_
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#ifndef AT91SAM7X256_H
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#include "at91lib/AT91SAM7X256.h"
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#endif
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#define BOARD_OLIMEX_SAM7_EX256
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#define MCK 18432000
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/*
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* I/O definitions.
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*/
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#define PIOA_LCD_RESET (1 << 2)
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#define PIOA_B1 (1 << 7)
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#define PIOA_B2 (1 << 8)
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#define PIOA_B3 (1 << 9)
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#define PIOA_B4 (1 << 14)
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#define PIOA_B5 (1 << 15)
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#define PIOA_USB_PUP (1 << 25)
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#define PIOA_USB_PR (1 << 26)
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#define PIOA_PA27 (1 << 27)
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#define PIOA_PA28 (1 << 28)
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#define PIOA_PA29 (1 << 29)
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#define PIOA_PA30 (1 << 30)
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#define PIOB_PHY_PD (1 << 18)
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#define PIOB_AUDIO_OUT (1 << 19)
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#define PIOB_LCD_BL (1 << 20)
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#define PIOB_PB21 (1 << 21)
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#define PIOB_MMC_WP (1 << 22)
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#define PIOB_MMC_CP (1 << 23)
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#define PIOB_SW1 (1 << 24)
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#define PIOB_SW2 (1 << 25)
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#define PIOB_PHY_IRQ (1 << 26)
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#define PIOB_PB27_AD0 (1 << 27)
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#define PIOB_PB27_AD1 (1 << 28)
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#define PIOB_PB27_AD2 (1 << 29)
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#define PIOB_PB27_AD3 (1 << 30)
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#endif /* _BOARD_H_ */
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