Nut/OS  4.10.3
API Reference
Functions
Reset Controller
AT91 Support

Reset controller registers. More...

Collaboration diagram for Reset Controller:

Functions

void At91Reset (void)
 System reset.
int At91ResetCause (void)

Reset Controller Control Register

#define RSTC_CR   (RSTC_BASE + 0x00)
 Reset controller control register address.
#define RSTC_PROCRST   0x00000001
 Processor reset.
#define RSTC_PERRST   0x00000004
 Peripheral reset.
#define RSTC_EXTRST   0x00000008
 External reset.
#define RSTC_KEY   0xA5000000
 Password.

Reset Controller Status Register

#define RSTC_SR   (RSTC_BASE + 0x04)
 Reset controller status register address.
#define RSTC_URSTS   0x00000001
 User reset status.
#define RSTC_BODSTS   0x00000002
 Brownout detection status.
#define RSTC_RSTTYP   0x00000700
 Reset type.
#define RSTC_RSTTYP_POWERUP   0x00000000
 Power-up reset.
#define RSTC_RSTTYP_WAKEUP   0x00000100
 VDDCORE rising.
#define RSTC_RSTTYP_WATCHDOG   0x00000200
 Watchdog reset.
#define RSTC_RSTTYP_SOFTWARE   0x00000300
 Software reset.
#define RSTC_RSTTYP_USER   0x00000400
 User reset.
#define RSTC_RSTTYP_BROWNOUT   0x00000500
 Brownout reset.
#define RSTC_NRSTL   0x00010000
 NRST pin level.
#define RSTC_SRCMP   0x00020000
 Software reset command in progress.

Reset Controller Mode Register

#define RSTC_MR   (RSTC_BASE + 0x08)
 Reset controller mode register address.
#define RSTC_URSTEN   0x00000001
 User reset enable.
#define RSTC_URSTIEN   0x00000010
 User reset interrupt enable.
#define RSTC_ERSTL   0x00000F00
 External reset length.
#define RSTC_ERSTL_LSB   8
 Least significant bit of external reset length.
#define RSTC_BODIEN   0x00010000
 Brown-out detection interrupt enable.
#define RSTC_KEY_MSK   0xFF000000
 Password mask.

Detailed Description

Reset controller registers.

Define Documentation

#define RSTC_CR   (RSTC_BASE + 0x00)

Reset controller control register address.

Definition at line 60 of file at91_rstc.h.

Referenced by At91Reset().

#define RSTC_PROCRST   0x00000001

Processor reset.

Definition at line 61 of file at91_rstc.h.

Referenced by At91Reset().

#define RSTC_PERRST   0x00000004

Peripheral reset.

Definition at line 62 of file at91_rstc.h.

Referenced by At91Reset().

#define RSTC_EXTRST   0x00000008

External reset.

Definition at line 63 of file at91_rstc.h.

Referenced by At91Reset().

#define RSTC_KEY   0xA5000000

Password.

Definition at line 64 of file at91_rstc.h.

Referenced by __init2(), and At91Reset().

#define RSTC_SR   (RSTC_BASE + 0x04)

Reset controller status register address.

Definition at line 69 of file at91_rstc.h.

Referenced by At91ResetCause().

#define RSTC_URSTS   0x00000001

User reset status.

Definition at line 70 of file at91_rstc.h.

#define RSTC_BODSTS   0x00000002

Brownout detection status.

Definition at line 71 of file at91_rstc.h.

#define RSTC_RSTTYP   0x00000700

Reset type.

Definition at line 72 of file at91_rstc.h.

Referenced by At91ResetCause().

#define RSTC_RSTTYP_POWERUP   0x00000000

Power-up reset.

Definition at line 73 of file at91_rstc.h.

Referenced by At91ResetCause().

#define RSTC_RSTTYP_WAKEUP   0x00000100

VDDCORE rising.

Definition at line 74 of file at91_rstc.h.

#define RSTC_RSTTYP_WATCHDOG   0x00000200

Watchdog reset.

Definition at line 75 of file at91_rstc.h.

Referenced by At91ResetCause().

#define RSTC_RSTTYP_SOFTWARE   0x00000300

Software reset.

Definition at line 76 of file at91_rstc.h.

Referenced by At91ResetCause().

#define RSTC_RSTTYP_USER   0x00000400

User reset.

Definition at line 77 of file at91_rstc.h.

Referenced by At91ResetCause().

#define RSTC_RSTTYP_BROWNOUT   0x00000500

Brownout reset.

Definition at line 78 of file at91_rstc.h.

Referenced by At91ResetCause().

#define RSTC_NRSTL   0x00010000

NRST pin level.

Definition at line 79 of file at91_rstc.h.

#define RSTC_SRCMP   0x00020000

Software reset command in progress.

Definition at line 80 of file at91_rstc.h.

#define RSTC_MR   (RSTC_BASE + 0x08)

Reset controller mode register address.

Definition at line 85 of file at91_rstc.h.

Referenced by __init2().

#define RSTC_URSTEN   0x00000001

User reset enable.

Definition at line 86 of file at91_rstc.h.

Referenced by __init2().

#define RSTC_URSTIEN   0x00000010

User reset interrupt enable.

Definition at line 87 of file at91_rstc.h.

#define RSTC_ERSTL   0x00000F00

External reset length.

Definition at line 88 of file at91_rstc.h.

#define RSTC_ERSTL_LSB   8

Least significant bit of external reset length.

Definition at line 89 of file at91_rstc.h.

#define RSTC_BODIEN   0x00010000

Brown-out detection interrupt enable.

Definition at line 90 of file at91_rstc.h.

#define RSTC_KEY_MSK   0xFF000000

Password mask.

Definition at line 91 of file at91_rstc.h.

Function Documentation

void At91Reset ( void  )

System reset.

Definition at line 54 of file at91_reset.c.

References At91WatchDogStart(), outr, RSTC_CR, RSTC_EXTRST, RSTC_KEY, RSTC_PERRST, and RSTC_PROCRST.

Referenced by NutReset().

Here is the call graph for this function:

int At91ResetCause ( void  )

Definition at line 67 of file at91_reset.c.

References inr, NUT_RSTTYP_BROWNOUT, NUT_RSTTYP_EXTERNAL, NUT_RSTTYP_POWERUP, NUT_RSTTYP_SOFTWARE, NUT_RSTTYP_UNKNOWN, NUT_RSTTYP_WATCHDOG, RSTC_RSTTYP, RSTC_RSTTYP_BROWNOUT, RSTC_RSTTYP_POWERUP, RSTC_RSTTYP_SOFTWARE, RSTC_RSTTYP_USER, RSTC_RSTTYP_WATCHDOG, and RSTC_SR.

Referenced by NutResetCause().