--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/AT91/Master/interrupt_timer.c	Wed Oct 22 21:17:38 2008 +0200
@@ -0,0 +1,110 @@
+// ----------------------------------------------------------------------------
+//         ATMEL Microcontroller Software Support  -  ROUSSET  -
+// ----------------------------------------------------------------------------
+// DISCLAIMER:  THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
+// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
+// DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+// OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+// EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+// ----------------------------------------------------------------------------
+// File Name           : interrupt_timer.c
+// Object              : Timer interrupt management
+//                     : Use AT91B_LED7 & AT91B_LED8 for status interrupt
+// Creation            : JPP   08-Sep-2005
+// ----------------------------------------------------------------------------
+
+// Include Standard LIB  files
+#include "config.h"
+
+//* Global variable
+int timer0_interrupt = 0;
+
+#define TIMER0_INTERRUPT_LEVEL		1
+
+/*-----------------*/
+/* Clock Selection */
+/*-----------------*/
+#define TC_CLKS                  0x7
+#define TC_CLKS_MCK2             0x0
+#define TC_CLKS_MCK8             0x1
+#define TC_CLKS_MCK32            0x2
+#define TC_CLKS_MCK128           0x3
+#define TC_CLKS_MCK1024          0x4
+
+//*------------------------- Internal Function --------------------------------
+//*----------------------------------------------------------------------------
+//* Function Name       : AT91F_TC_Open
+//* Object              : Initialize Timer Counter Channel and enable is clock
+//* Input Parameters    : <tc_pt> = TC Channel Descriptor Pointer
+//*                       <mode> = Timer Counter Mode
+//*                     : <TimerId> = Timer peripheral ID definitions
+//* Output Parameters   : None
+//*----------------------------------------------------------------------------
+void AT91F_TC_Open ( AT91PS_TC TC_pt, unsigned int Mode, unsigned int TimerId)
+{
+  unsigned int dummy;
+
+  //* First, enable the clock of the TIMER
+  AT91F_PMC_EnablePeriphClock ( AT91C_BASE_PMC, 1<< TimerId ) ;
+
+  //* Disable the clock and the interrupts
+  TC_pt->TC_CCR = AT91C_TC_CLKDIS ;
+  TC_pt->TC_IDR = 0xFFFFFFFF ;
+
+  //* Clear status bit
+  dummy = TC_pt->TC_SR;
+  //* Suppress warning variable "dummy" was set but never used
+  dummy = dummy;
+  //* Set the Mode of the Timer Counter
+  TC_pt->TC_CMR = Mode ;
+
+  //* Enable the clock
+  TC_pt->TC_CCR = AT91C_TC_CLKEN ;
+}
+//*------------------------- Interrupt Function -------------------------------
+
+//*----------------------------------------------------------------------------
+//* Function Name       : timer0_c_irq_handler
+//* Object              : C handler interrupt function calAT91B_LED by the interrupts
+//*                       assembling routine
+//* Output Parameters   : increment count_timer0_interrupt
+//*----------------------------------------------------------------------------
+void timer0_c_irq_handler(void)
+{
+  AT91PS_TC TC_pt = AT91C_BASE_TC0;
+  unsigned int dummy;
+  //* AcknowAT91B_LEDge interrupt status
+  dummy = TC_pt->TC_SR;
+  //* Suppress warning variable "dummy" was set but never used
+  dummy = dummy;
+  timer0_interrupt = TRUE;
+}
+
+//*-------------------------- External Function -------------------------------
+
+//*----------------------------------------------------------------------------
+//* Function Name       : timer_init
+//* Object              : Init timer counter
+//* Input Parameters    : none
+//* Output Parameters   : TRUE
+//*----------------------------------------------------------------------------
+void timer_init (unsigned int time)
+{
+  //* Open timer0
+  AT91F_TC_Open(AT91C_BASE_TC0,TC_CLKS_MCK8 | AT91C_TC_WAVESEL_UP_AUTO,AT91C_ID_TC0);
+
+  //* Open Timer 0 interrupt
+  AT91F_AIC_ConfigureIt ( AT91C_BASE_AIC, AT91C_ID_TC0, TIMER0_INTERRUPT_LEVEL,AT91C_AIC_SRCTYPE_INT_HIGH_LEVEL, timer0_c_irq_handler);
+  AT91C_BASE_TC0->TC_IER = AT91C_TC_CPCS;  //  IRQ enable CPC
+  AT91F_AIC_EnableIt (AT91C_BASE_AIC, AT91C_ID_TC0);
+
+  AT91C_BASE_TC0->TC_RC = (unsigned int)(AT91C_MASTER_CLOCK / 8 * time / 1000);
+
+  //* Start timer0
+  AT91C_BASE_TC0->TC_CCR = AT91C_TC_SWTRG ;
+}