dali/bacnet_stack
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This commit is contained in:
skarg
2007-11-29 15:56:53 +00:00
parent c585241c03
commit 411d6c1b24
236 changed files with 17864 additions and 15724 deletions
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bacnet-stack/ports/at91sam7s/timer.c
+22 -16
View File
@@ -50,7 +50,9 @@ volatile unsigned long Timer_Milliseconds;
/* MS/TP Silence Timer */
static volatile int SilenceTime;
static void Timer0_Setup(int milliseconds) {
static void Timer0_Setup(
int milliseconds)
{
// TC Block Control Register TC_BCR (read/write)
//
// |------------------------------------------------------------------|------|
@@ -214,7 +216,7 @@ static void Timer0_Setup(int milliseconds) {
//
// TIMER_CLOCK5 = (MCK / 1024) / 1000
// = 48054841 / 1024 / 1000 = 46.928
pTC->TC_RC = ((MCK/1024/1000)+1)*milliseconds;
pTC->TC_RC = ((MCK / 1024 / 1000) + 1) * milliseconds;
// TC Interrupt Enable Register TC_IER (write-only)
//
@@ -297,9 +299,11 @@ static void Timer0_Setup(int milliseconds) {
// Modified by Steve Karg
// simplified and changed to a millisecond count-up timer
// *****************************************************************************
static void Timer0IrqHandler (void) {
static void Timer0IrqHandler(
void)
{
volatile AT91PS_TC pTC = AT91C_BASE_TC0; // pointer to timer channel 0 register structure
volatile AT91PS_TC pTC = AT91C_BASE_TC0; // pointer to timer channel 0 register structure
unsigned int dummy; // temporary
// read TC0 Status Register to clear interrupt
@@ -310,12 +314,14 @@ static void Timer0IrqHandler (void) {
SilenceTime++;
}
int Timer_Silence(void)
int Timer_Silence(
void)
{
return SilenceTime;
}
void Timer_Silence_Reset(void)
void Timer_Silence_Reset(
void)
{
SilenceTime = 0;
}
@@ -330,33 +336,33 @@ void Timer_Silence_Reset(void)
// Moved timer startup code from main
// modified the peripheral clock init
// *****************************************************************************
void TimerInit(void)
void TimerInit(
void)
{
// enable the Timer0 peripheral clock
volatile AT91PS_PMC pPMC = AT91C_BASE_PMC;
pPMC->PMC_PCER = pPMC->PMC_PCSR | (1<<AT91C_ID_TC0);
pPMC->PMC_PCER = pPMC->PMC_PCSR | (1 << AT91C_ID_TC0);
// Set up the AIC registers for Timer 0
volatile AT91PS_AIC pAIC = AT91C_BASE_AIC;
volatile AT91PS_AIC pAIC = AT91C_BASE_AIC;
// Disable timer 0 interrupt
// in AIC Interrupt Disable Command Register
pAIC->AIC_IDCR = (1<<AT91C_ID_TC0);
pAIC->AIC_IDCR = (1 << AT91C_ID_TC0);
// Set the TC0 IRQ handler address in
// AIC Source Vector Register[12]
pAIC->AIC_SVR[AT91C_ID_TC0] =
(unsigned int)Timer0IrqHandler;
pAIC->AIC_SVR[AT91C_ID_TC0] = (unsigned int) Timer0IrqHandler;
// Set the interrupt source type and priority
// in AIC Source Mode Register[12]
pAIC->AIC_SMR[AT91C_ID_TC0] =
(AT91C_AIC_SRCTYPE_INT_LEVEL_SENSITIVE | 0x4 );
(AT91C_AIC_SRCTYPE_INT_LEVEL_SENSITIVE | 0x4);
// Clear the TC0 interrupt
// in AIC Interrupt Clear Command Register
pAIC->AIC_ICCR = (1<<AT91C_ID_TC0);
pAIC->AIC_ICCR = (1 << AT91C_ID_TC0);
// Remove disable timer 0 interrupt
// in AIC Interrupt Disable Command Reg
pAIC->AIC_IDCR = (0<<AT91C_ID_TC0);
pAIC->AIC_IDCR = (0 << AT91C_ID_TC0);
// Enable the TC0 interrupt
// in AIC Interrupt Enable Command Register
pAIC->AIC_IECR = (1<<AT91C_ID_TC0);
pAIC->AIC_IECR = (1 << AT91C_ID_TC0);
// Setup timer0 to generate a 1 msec periodic interrupt
Timer0_Setup(1);
}