+++ /dev/null
-#error This code must be revised for the new timer API
-/*!
- * \file
- * <!--
- * Copyright 2004 Develer S.r.l. (http://www.develer.com/)
- * Copyright 2004 Giovanni Bajo
- * This file is part of DevLib - See README.devlib for information.
- * -->
- *
- * \version $Id$
- *
- * \author Giovanni Bajo <rasky@develer.com>
- *
- * \brief Driver module for DSP56K
- */
-
-/*#*
- *#* $Log$
- *#* Revision 1.9 2006/02/21 21:28:02 bernie
- *#* New time handling based on TIMER_TICKS_PER_SEC to support slow timers with ticks longer than 1ms.
- *#*
- *#* Revision 1.8 2005/11/04 16:20:02 bernie
- *#* Fix reference to README.devlib in header.
- *#*
- *#* Revision 1.7 2005/04/11 19:10:28 bernie
- *#* Include top-level headers from cfg/ subdir.
- *#*
- *#* Revision 1.6 2004/11/16 22:37:14 bernie
- *#* Replace IPTR with iptr_t.
- *#*
- *#* Revision 1.5 2004/08/25 14:12:08 rasky
- *#* Aggiornato il comment block dei log RCS
- *#*
- *#* Revision 1.4 2004/07/30 14:27:49 rasky
- *#* Aggiornati alcuni file DSP56k per la nuova libreria di IRQ management
- *#*
- *#* Revision 1.3 2004/06/06 18:30:34 bernie
- *#* Import DSP56800 changes from SC.
- *#*
- *#* Revision 1.2 2004/06/03 11:27:09 bernie
- *#* Add dual-license information.
- *#*
- *#* Revision 1.1 2004/05/23 18:23:30 bernie
- *#* Import drv/timer module.
- *#*
- *#*/
-
-#ifndef DRV_TIMER_DSP56K_H
-#define DRV_TIMER_DSP56K_H
-
-#include "timer.h"
-#include <DSP56F807.h>
-#include <cfg/compiler.h>
-#include <hw.h>
-#include <drv/irq.h>
-
-// Calculate register pointer and irq vector from hw.h setting
-#define REG_SYSTEM_TIMER PP_CAT(REG_TIMER_, SYSTEM_TIMER)
-#define SYSTEM_TIMER_IRQ_VECTOR PP_CAT(IRQ_TIMER_, SYSTEM_TIMER)
-
-//! Prescaler for the system timer
-#define TIMER_PRESCALER 16
-
-//! Frequency of the hardware high precision timer
-#define TIMER_HW_HPTICKS_PER_SEC (IPBUS_FREQ / TIMER_PRESCALER)
-
-//! Type of time expressed in ticks of the hardware high precision timer
-typedef uint16_t hptime_t;
-
-static void system_timer_isr(UNUSED(iptr_t, arg));
-
-static void timer_hw_init(void)
-{
- uint16_t compare;
-
- // Clear compare flag status and enable interrupt on compare
- REG_SYSTEM_TIMER->SCR &= ~REG_TIMER_SCR_TCF;
- REG_SYSTEM_TIMER->SCR |= REG_TIMER_SCR_TCFIE;
-
- // Calculate the compare value needed to generate an interrupt exactly
- // TICKS_PER_SEC times each second (usually, every millisecond). Check that
- // the calculation is accurate, otherwise there is a precision error
- // (probably the prescaler is too big or too small).
- compare = TIMER_HW_HPTICKS_PER_SEC / TICKS_PER_SEC;
- ASSERT((uint32_t)compare * TICKS_PER_SEC == IPBUS_FREQ / TIMER_PRESCALER);
- REG_SYSTEM_TIMER->CMP1 = compare;
-
- // The value for reload (at initializationa and after compare is met) is zero
- REG_SYSTEM_TIMER->LOAD = 0;
-
- // Set the interrupt handler and priority
- irq_install(SYSTEM_TIMER_IRQ_VECTOR, &system_timer_isr, NULL);
- irq_setpriority(SYSTEM_TIMER_IRQ_VECTOR, IRQ_PRIORITY_SYSTEM_TIMER);
-
- // Small preprocessor trick to generate the REG_TIMER_CTRL_PRIMARY_IPBYNN macro
- // needed to set the prescaler
- #define REG_CONTROL_PRESCALER PP_CAT(REG_TIMER_CTRL_PRIMARY_IPBY, TIMER_PRESCALER)
-
- // Setup the counter and start counting
- REG_SYSTEM_TIMER->CTRL =
- REG_TIMER_CTRL_MODE_RISING | // count rising edges (normal)
- REG_CONTROL_PRESCALER | // frequency (IPbus / TIMER_PRESCALER)
- REG_TIMER_CTRL_LENGTH; // up to CMP1, then reload
-}
-
-INLINE void timer_hw_irq(void)
-{
- // Clear the overflow flag so that we are ready for another interrupt
- REG_SYSTEM_TIMER->SCR &= ~REG_TIMER_SCR_TCF;
-}
-
-INLINE hptime_t timer_hw_hpread(void)
-{
- return REG_SYSTEM_TIMER->CNTR;
-}
-
-#define DEFINE_TIMER_ISR \
- static void system_timer_isr(UNUSED(iptr_t, arg))
-
-#endif /* DRV_TIMER_DSP56_H */
projects / bertos.git / blobdiff