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Updated AVR32 demos and added AVR32 UC3B demo.

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This commit is contained in:
Richard Barry 2007-07-27 07:59:50 +00:00
parent 45e7e5ac55
commit 94c94d3c0e
164 changed files with 21458 additions and 3994 deletions
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64
Source/portable/GCC/AVR32_UC3/port.c
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@ -8,7 +8,7 @@
* - AppNote:
*
* \author Atmel Corporation: http://www.atmel.com \n
* Support email: avr32@atmel.com
* Support and FAQ: http://support.atmel.no/
*
*****************************************************************************/
@ -83,7 +83,8 @@ static void prvSetupTimerInterrupt( void );
/*-----------------------------------------------------------*/
/*
* Low-level initialization routine called during Newlib's startup.
* Low-level initialization routine called during startup, before the main
* function.
* This version comes in replacement to the default one provided by Newlib.
* Newlib's _init_startup only calls init_exceptions, but Newlib's exception
* vectors are not compatible with the SCALL management in the current FreeRTOS
@ -124,13 +125,19 @@ void _init_startup(void)
/* Code section present if and only if the debug trace is activated. */
#if configDBG
{
static const gpio_map_t DBG_USART_GPIO_MAP =
{
{ configDBG_USART_RX_PIN, configDBG_USART_RX_FUNCTION },
{ configDBG_USART_TX_PIN, configDBG_USART_TX_FUNCTION }
};
/* Initialize the USART used for the debug trace with the configured parameters. */
set_usart_base( ( void * ) configDBG_USART );
gpio_enable_module_pin( configDBG_USART_RX_PIN, configDBG_USART_RX_FUNCTION );
gpio_enable_module_pin( configDBG_USART_TX_PIN, configDBG_USART_TX_FUNCTION );
gpio_enable_module( DBG_USART_GPIO_MAP,
sizeof( DBG_USART_GPIO_MAP ) / sizeof( DBG_USART_GPIO_MAP[0] ) );
usart_init( configDBG_USART_BAUDRATE );
}
#endif
}
/*-----------------------------------------------------------*/
@ -194,15 +201,15 @@ __attribute__((__naked__)) static void vTick( void )
/* Save the context of the interrupted task. */
portSAVE_CONTEXT_OS_INT();
/* Schedule the COUNT&COMPARE match interrupt in (configCPU_CLOCK_HZ/configTICK_RATE_HZ)
clock cycles from now. */
#if( configTICK_USE_TC==1 )
/* Clear the interrupt flag. */
AVR32_TC.channel[configTICK_TC_CHANNEL].sr;
#else
/* Schedule the COUNT&COMPARE match interrupt in (configCPU_CLOCK_HZ/configTICK_RATE_HZ)
clock cycles from now. */
prvScheduleNextTick();
#endif
/* Because FreeRTOS is not supposed to run with nested interrupts, put all OS
calls in a critical section . */
portENTER_CRITICAL();
@ -253,7 +260,6 @@ void vPortExitCritical( void )
}
/*-----------------------------------------------------------*/
/*
* Initialise the stack of a task to look exactly as if a call to
* portSAVE_CONTEXT had been called.
@ -313,13 +319,39 @@ void vPortEndScheduler( void )
/* Schedule the COUNT&COMPARE match interrupt in (configCPU_CLOCK_HZ/configTICK_RATE_HZ)
clock cycles from now. */
#if( configTICK_USE_TC==0 )
static void prvScheduleFirstTick(void)
{
unsigned long lCycles;
lCycles = Get_system_register(AVR32_COUNT);
lCycles += (configCPU_CLOCK_HZ/configTICK_RATE_HZ);
// If lCycles ends up to be 0, make it 1 so that the COMPARE and exception
// generation feature does not get disabled.
if(0 == lCycles)
{
lCycles++;
}
Set_system_register(AVR32_COMPARE, lCycles);
}
static void prvScheduleNextTick(void)
{
unsigned long lCountVal, lCompareVal;
unsigned long lCycles, lCount;
lCountVal = Get_system_register(AVR32_COUNT);
lCompareVal = lCountVal + (configCPU_CLOCK_HZ/configTICK_RATE_HZ);
Set_system_register(AVR32_COMPARE, lCompareVal);
lCycles = Get_system_register(AVR32_COMPARE);
lCycles += (configCPU_CLOCK_HZ/configTICK_RATE_HZ);
// If lCycles ends up to be 0, make it 1 so that the COMPARE and exception
// generation feature does not get disabled.
if(0 == lCycles)
{
lCycles++;
}
lCount = Get_system_register(AVR32_COUNT);
if( lCycles < lCount )
{ // We missed a tick, recover for the next.
lCycles += (configCPU_CLOCK_HZ/configTICK_RATE_HZ);
}
Set_system_register(AVR32_COMPARE, lCycles);
}
#endif
/*-----------------------------------------------------------*/
@ -383,12 +415,12 @@ static void prvSetupTimerInterrupt(void)
INTC_register_interrupt(&vTick, configTICK_TC_IRQ, INT0);
/* Initialize the timer/counter. */
tc_init_waveform(tc, &waveform_opt);
tc_init_waveform(tc, &waveform_opt);
/* Set the compare triggers.
Remember TC counter is 16-bits, so counting second is not possible!
That's why we configure it to count ms. */
tc_write_rc( tc, configTICK_TC_CHANNEL, ( configPBA_CLOCK_HZ/ 4) / 1000 );
tc_write_rc( tc, configTICK_TC_CHANNEL, ( configPBA_CLOCK_HZ / 4) / configTICK_RATE_HZ );
tc_configure_interrupts( tc, configTICK_TC_CHANNEL, &tc_interrupt );
@ -398,7 +430,7 @@ static void prvSetupTimerInterrupt(void)
#else
{
INTC_register_interrupt(&vTick, AVR32_CORE_COMPARE_IRQ, INT0);
prvScheduleNextTick();
prvScheduleFirstTick();
}
#endif
}