AT91 Support

AT91 peripheral registers. More...

Collaboration diagram for AT91 Support:

Modules
	ADC
	A/D Converter.
	AIC: Interrupt Controller
	Advanced interrupt controller registers.
	Chip Configuration
	Chip configuration register.
	Debug Unit
	Debug unit registers.
	Bus Interface
	External bus interface registers.
	Embedded Flash Controller
	Embedded flash controller registers.
	EMAC Module
	Ethernet MAC module registers.
	Bus Matrix
	Bus matrix registers.
	Multimedia Card
	Multimedia card registers.
	MCI Multimedia Card Interface
	Multimedia card interface registers.
	Parallel I/O
	Parallel I/O controller registers.
	Periodic Interval Timer
	Periodic interval timer registers.
	Power Management Controller
	Power management controller registers.
	PWM Controller
	PWM controller registers.
	Power Saving
	Power saving registers.
	AT91x40
	Register definitions.
	AT91SAM7SE
	Register definitions.
	AT91SAM7X
	Register definitions.
	Reset Controller
	Reset controller registers.
	AT91SAM9XE
	Register definitions.
	AT91SAM9260
	Register definitions.
	SDRAM Controller
	SDRAM controller registers.
	Special Function
	Special function registers.
	Static Memory Controller
	Static memory controller registers.
	Serial Peripheral Interface
	Serial peripheral interface registers.
	SPI Mode MMC Interface
	SPI mode MMC interface registers.
	Serial Synchronous Controller
	Serial synchronous controller registers.
	Timer/Counter
	Timer / Counter registers.
	AT91 Two Wire Interface
	Two wire interface.
	USB Device Port
	Universal serial bus device registers.
	USART
	Universal synchronous / asynchronous receiver / transmitter registers.
	Watchdog Registers
	Watchdog timer registers.
	AT91 Watchdog Registers
	Watchdog timer registers.
	Watchdog Functions
	AT91 on-chip watchdog timer.
	Davicom DM9161A
	Davicom DM9161A registers.
	SAM7X EMAC
	SAM7X EMAC registers.
Defines
#define	IRQ_ENTRY()
	Interrupt entry.
#define	IRQ_EXIT()
	Interrupt exit.
#define	FIQ_ENTRY()
	Fast interrupt entry.
#define	FIQ_EXIT()
	Fast interrupt exit.

---

Detailed Description

AT91 peripheral registers.

AT91 is a family of microcontrollers manufactured by Atmel. They are based on the 32-bit RISC microprocessors from ARM. The following members had been tested with Nut/OS:

• AT91R40008
• AT91SAM7XC256
• AT91SAM9260

The AT91 peripherals are connected to the 32-bit wide advanced peripheral bus. All registers are word accessible only.

---

Define Documentation

#define IRQ_ENTRY

(

)

Value:

asm volatile("sub   lr, lr,#4"          "\n\t"  /* Adjust LR */ \
                 "stmfd sp!,{r0-r12,lr}"    "\n\t"  /* Save registers on IRQ stack. */ \
                 "mrs   r1, spsr"           "\n\t"  /* Save SPSR */ \
                 "stmfd sp!,{r1}"           "\n\t")

Interrupt entry.

Definition at line 124 of file at91.h.

Referenced by NicInterruptEntry(), Uart0IrqEntry(), and Uart1IrqEntry().

#define IRQ_EXIT

(

)

Value:

asm volatile("ldmfd sp!, {r1}"          "\n\t"  /* Restore SPSR */ \
                 "msr   spsr_c, r1"         "\n\t"  /* */ \
                 "ldr   r0, =0xFFFFF000"    "\n\t"  /* End of interrupt. */ \
                 "str   r0, [r0, #0x130]"   "\n\t"  /* */ \
                 "ldmfd sp!, {r0-r12, pc}^" "\n\t")

Interrupt exit.

Definition at line 133 of file at91.h.

Referenced by NicInterruptEntry(), Uart0IrqEntry(), and Uart1IrqEntry().

#define FIQ_ENTRY

(

)

Value:

asm volatile("sub   lr, lr,#4"          "\n\t"  /* Adjust LR */ \
                 "stmfd sp!,{r0-r7,lr}"    "\n\t"  /* Save registers on IRQ stack. */ \
                 "mrs   r1, spsr"           "\n\t"  /* Save SPSR */ \
                 "stmfd sp!,{r1}"           "\n\t")

Fast interrupt entry.

Definition at line 143 of file at91.h.

#define FIQ_EXIT

(

)

Value:

asm volatile("ldmfd sp!, {r1}"          "\n\t"  /* Restore SPSR */ \
                 "msr   spsr_c, r1"         "\n\t"  /* */ \
                 "ldr   r0, =0xFFFFF000"    "\n\t"  /* End of interrupt. */ \
                 "str   r0, [r0, #0x130]"   "\n\t"  /* */ \
                 "ldmfd sp!, {r0-r7, pc}^" "\n\t")

Fast interrupt exit.

Definition at line 152 of file at91.h.