System Control Space (SCS) => Data Watchpoint and Trace (DWT). More...

Collaboration diagram for Cortex-M Data Watch and Trace unit.:

Macros
#define	DWT_CTRL MMIO32(DWT_BASE + 0x00)
	DWT Control register Purpose Provides configuration and status information for the DWT block, and used to control features of the block Usage constraints: There are no usage constraints. More...

#define	DWT_PCSR MMIO32(DWT_BASE + 0x1C)

#define	DWT_COMP(n) MMIO32(DWT_BASE + 0x20 + (n) * 16)

#define	DWT_MASK(n) MMIO32(DWT_BASE + 0x24 + (n) * 16)

#define	DWT_FUNCTION(n) MMIO32(DWT_BASE + 0x28 + (n) * 16)

#define	DWT_LSR MMIO32(DWT_BASE + CORESIGHT_LSR_OFFSET)

#define	DWT_LAR MMIO32(DWT_BASE + CORESIGHT_LAR_OFFSET)

#define	DWT_CTRL_NUMCOMP_SHIFT 28

#define	DWT_CTRL_NUMCOMP (0x0F << DWT_CTRL_NUMCOMP_SHIFT)

#define	DWT_MASKx_MASK 0x0F

#define	DWT_FUNCTIONx_MATCHED (1 << 24)

#define	DWT_FUNCTIONx_FUNCTION 15

#define	DWT_FUNCTIONx_FUNCTION_DISABLED 0

Functions
bool	dwt_enable_cycle_counter (void)

uint32_t	dwt_read_cycle_counter (void)

Detailed Description

System Control Space (SCS) => Data Watchpoint and Trace (DWT).

See "ARMv7-M Architecture Reference Manual" and "ARMv6-M Architecture Reference Manual" The DWT is an optional debug unit that provides watchpoints, data tracing, and system profiling for the processor.

Macro Definition Documentation

◆ DWT_COMP

#define DWT_COMP ( n ) MMIO32(DWT_BASE + 0x20 + (n) * 16)

Definition at line 89 of file dwt.h.

◆ DWT_CTRL

#define DWT_CTRL MMIO32(DWT_BASE + 0x00)

DWT Control register Purpose Provides configuration and status information for the DWT block, and used to control features of the block Usage constraints: There are no usage constraints.

Configurations Always implemented.

Definition at line 47 of file dwt.h.

◆ DWT_CTRL_NUMCOMP

#define DWT_CTRL_NUMCOMP (0x0F << DWT_CTRL_NUMCOMP_SHIFT)

Definition at line 106 of file dwt.h.

◆ DWT_CTRL_NUMCOMP_SHIFT

#define DWT_CTRL_NUMCOMP_SHIFT 28

Definition at line 105 of file dwt.h.

◆ DWT_FUNCTION

#define DWT_FUNCTION ( n ) MMIO32(DWT_BASE + 0x28 + (n) * 16)

Definition at line 91 of file dwt.h.

◆ DWT_FUNCTIONx_FUNCTION

#define DWT_FUNCTIONx_FUNCTION 15

Definition at line 179 of file dwt.h.

◆ DWT_FUNCTIONx_FUNCTION_DISABLED

#define DWT_FUNCTIONx_FUNCTION_DISABLED 0

Definition at line 180 of file dwt.h.

◆ DWT_FUNCTIONx_MATCHED

#define DWT_FUNCTIONx_MATCHED (1 << 24)

Definition at line 155 of file dwt.h.

◆ DWT_LAR

#define DWT_LAR MMIO32(DWT_BASE + CORESIGHT_LAR_OFFSET)

Definition at line 96 of file dwt.h.

◆ DWT_LSR

#define DWT_LSR MMIO32(DWT_BASE + CORESIGHT_LSR_OFFSET)

Definition at line 94 of file dwt.h.

◆ DWT_MASK

#define DWT_MASK ( n ) MMIO32(DWT_BASE + 0x24 + (n) * 16)

Definition at line 90 of file dwt.h.

◆ DWT_MASKx_MASK

#define DWT_MASKx_MASK 0x0F

Definition at line 151 of file dwt.h.

◆ DWT_PCSR

#define DWT_PCSR MMIO32(DWT_BASE + 0x1C)

Definition at line 88 of file dwt.h.

Function Documentation

◆ dwt_enable_cycle_counter()

bool dwt_enable_cycle_counter ( void )

◆ dwt_read_cycle_counter()

uint32_t dwt_read_cycle_counter ( void )

Macros

Functions