AT91SAM7A3-Interrupt.rar_AT91SAM7A3

//*---------------------------------------------------------------------------- //* ATMEL Microcontroller Software Support - ROUSSET - //*---------------------------------------------------------------------------- //* The software is delivered "AS IS" without warranty or condition of any //* kind, either express, implied or statutory. This includes without //* limitation any warranty or condition with respect to merchantability or //* fitness for any particular purpose, or against the infringements of //* intellectual property rights of others. //*---------------------------------------------------------------------------- //* File Name : main.c //* Object : main application written in C //* 1.0 24/Jun/04 JPP : Creation //* 1.1 21/Feb/05 JPP : Update AT91C_RSTC_URSTEN //* 1.1 06/Sep/05 JPP : Update AIC definion //*---------------------------------------------------------------------------- // Include Standard LIB files #include "Board.h" //* Waiting time between LED1 and LED2 #define WAIT_TIME MCK #define PIO_INTERRUPT_LEVEL 6 #define IRQ0_INTERRUPT_LEVEL 2 #define SOFT_INTERRUPT_LEVEL 5 #define FIQ_INTERRUPT_LEVEL 0 //* Global variable int count_timer0_interrupt; int count_timer1_interrupt; // Use the Library Handler defined in file periph/pio/pio_irq/irq_pio.s extern void FIQ_init_handler(void); extern void at91_IRQ0_handler(void); // External Function Prototype extern void timer_init (void ); extern void Usart_init (void); //*---------------------------------------------------------------------------- //* Function Name : aic_software_interrupt //* Object : Software interrupt function //* Input Parameters : none //* Output Parameters : none //* Functions called : at91_pio_write //*---------------------------------------------------------------------------- __ramfunc void aic_software_interrupt(void) { //* Read the output state if ( (AT91F_PIO_GetInput(AT91C_BASE_PIOA) & LED2 ) == LED2 ) { AT91F_PIO_ClearOutput( AT91C_BASE_PIOA, LED2 ); } else { AT91F_PIO_SetOutput( AT91C_BASE_PIOA, LED2 ); } } //*---------------------------------------------------------------------------- //* Function Name : pio_c_irq_handler //* Object : Irq Handler called by the irq_pio.s //* Input Parameters : none //* Output Parameters : none //* Functions called : at91_pio_read, at91_pio_write //*---------------------------------------------------------------------------- __ramfunc void pio_c_irq_handler ( void ) { int dummy; //* Read the output state if ( (AT91F_PIO_GetInput(AT91C_BASE_PIOA) & LED2 ) == LED2 ) { AT91F_PIO_ClearOutput( AT91C_BASE_PIOA, LED2); } else { AT91F_PIO_SetOutput( AT91C_BASE_PIOA, LED2); } //* enable the next PIO IRQ dummy =AT91C_BASE_PIOA->PIO_ISR; //* suppress the compilation warning dummy =dummy; //* while SW3 is push wait while ( (AT91F_PIO_GetInput(AT91C_BASE_PIOA) & SW3_MASK ) != SW3_MASK ); } //*---------------------------------------------------------------------------- //* Function Name : delay //* Object : Wait //* Input Parameters : none //* Output Parameters : none //* Functions called : none //*---------------------------------------------------------------------------- void delay ( void ) { //* Set in Volatile for Optimisation volatile unsigned int i ; //* loop delay for ( i = 0 ;(i < WAIT_TIME/100 );i++ ) ; } //*---------------------------------------------------------------------------- //* Function Name : main //* Object : Main interrupt function //* level timer 0 => 1 //* SW2 level Irq0 => 2 //* level timer 1 => 4 //* SW4 level PIOA => 6 //* level USART => 7 //* LEVEL FIQ => MAX //* Input Parameters : none //* Output Parameters : TRUE //*---------------------------------------------------------------------------- int main( void ) //* Begin { unsigned int loop_count ; AT91PS_AIC pAic; //* Load System pAic Base address pAic = AT91C_BASE_AIC; //* Enable User Reset and set its minimal assertion to 960 us AT91C_BASE_RSTC->RSTC_RMR = AT91C_RSTC_URSTEN | (0x4<<8) | (unsigned int)(0xA5<<24); //* Init loop_count = 0 ; // First, enable the clock of the PIOB AT91F_PMC_EnablePeriphClock ( AT91C_BASE_PMC, 1 << AT91C_ID_PIOA ) ; //* then, we configure the PIO Lines corresponding to LED1 to LED8 //* to be outputs. No need to set these pins to be driven by the PIO because it is GPIO pins only. AT91F_PIO_CfgOutput( AT91C_BASE_PIOA, LED_MASK ) ; //* Clear the LED's. On the EB55 we must apply a "1" to turn off LEDs AT91F_PIO_SetOutput( AT91C_BASE_PIOA, LED_MASK ) ; //* open external PIO interrupt //* define switch SW3 at PIO input for interrupt IRQ loop AT91F_PIO_CfgInput(AT91C_BASE_PIOA, SW3_MASK | SW4_MASK); AT91F_AIC_ConfigureIt ( pAic, AT91C_ID_PIOA, PIO_INTERRUPT_LEVEL,AT91C_AIC_SRCTYPE_INT_HIGH_LEVEL, pio_c_irq_handler); AT91F_PIO_InterruptEnable(AT91C_BASE_PIOA,SW4_MASK); //* set the interrupt by software AT91F_AIC_EnableIt (pAic, AT91C_ID_PIOA); //* open external IRQ interrupt AT91F_PIO_CfgPeriph(AT91C_BASE_PIOA,SW2_MASK,0); //* open external IRQ0 interrupt AT91F_AIC_ConfigureIt ( pAic, AT91C_ID_IRQ0, IRQ0_INTERRUPT_LEVEL,AT91C_AIC_SRCTYPE_EXT_NEGATIVE_EDGE, at91_IRQ0_handler); AT91F_AIC_EnableIt (pAic, AT91C_ID_IRQ0); //* Open the software interrupt on the AIC AT91F_AIC_ConfigureIt ( pAic, AT91C_ID_SYS, SOFT_INTERRUPT_LEVEL, AT91C_AIC_SRCTYPE_INT_POSITIVE_EDGE, aic_software_interrupt); AT91F_AIC_EnableIt (pAic, AT91C_ID_SYS); //* open FIQ interrupt AT91F_PIO_CfgPeriph(AT91C_BASE_PIOA,SW1_MASK,0); AT91F_AIC_ConfigureIt ( pAic, AT91C_ID_FIQ, FIQ_INTERRUPT_LEVEL,AT91C_AIC_SRCTYPE_EXT_NEGATIVE_EDGE, FIQ_init_handler); AT91F_AIC_EnableIt (pAic, AT91C_ID_FIQ); //* generate FIQ interrupt by software AT91F_AIC_Trig (pAic,AT91C_ID_FIQ) ; //* Init timer interrupt timer_init(); //* generate software interrupt AT91F_AIC_Trig (pAic,AT91C_ID_SYS) ; for (;;) { AT91F_PIO_ClearOutput( AT91C_BASE_PIOA, LED1 ); delay () ; AT91F_PIO_SetOutput( AT91C_BASE_PIOA, LED1 ); delay () ; loop_count ++ ; //* Set LED by software interrupt if (loop_count == 10) { loop_count=0; //* Software interrupt AT91F_AIC_Trig (pAic,AT91C_ID_SYS) ; } } //* End }