[−][src]Module cc2650::cpu_dwt
Cortex-M's Data watchpoint and Trace (DWT)
Modules
comp0 | Comparator 0 This register is used to write the reference value for comparator 0. |
comp1 | Comparator 1 This register is used to write the reference value for comparator 1. |
comp2 | Comparator 2 This register is used to write the reference value for comparator 2. |
comp3 | Comparator 3 This register is used to write the reference value for comparator 3. |
cpicnt | CPI Count This register is used to count the total number of instruction cycles beyond the first cycle. |
ctrl | Control Use the DWT Control Register to enable the DWT unit. |
cyccnt | Current PC Sampler Cycle Count This register is used to count the number of core cycles. This counter can measure elapsed execution time. This is a free-running counter (this counter will not advance in power modes where free-running clock to CPU stops). The counter has three functions: 1: When CTRL.PCSAMPLEENA = 1, the PC is sampled and emitted when the selected tapped bit changes value (0 to 1 or 1 to 0) and any post-scalar value counts to 0. 2: When CTRL.CYCEVTENA = 1 , (and CTRL.PCSAMPLEENA = 0), an event is emitted when the selected tapped bit changes value (0 to 1 or 1 to 0) and any post-scalar value counts to 0. 3: Applications and debuggers can use the counter to measure elapsed execution time. By subtracting a start and an end time, an application can measure time between in-core clocks (other than when Halted in debug). This is valid to 2^32 core clock cycles (for example, almost 89.5 seconds at 48MHz). |
exccnt | Exception Overhead Count This register is used to count the total cycles spent in interrupt processing. |
foldcnt | Fold Count This register is used to count the total number of folded instructions. The counter increments on each instruction which takes 0 cycles. |
function0 | Function 0 Use the DWT Function Registers 0 to control the operation of the comparator 0. This comparator can: 1. Match against either the PC or the data address. This is controlled by CYCMATCH. This function is only available for comparator 0 (COMP0). 2. Emit data or PC couples, trigger the ETM, or generate a watchpoint depending on the operation defined by FUNCTION. |
function1 | Function 1 Use the DWT Function Registers 1 to control the operation of the comparator 1. This comparator can: 1. Perform data value comparisons if associated address comparators have performed an address match. This function is only available for comparator 1 (COMP1). 2. Emit data or PC couples, trigger the ETM, or generate a watchpoint depending on the operation defined by FUNCTION. |
function2 | Function 2 Use the DWT Function Registers 2 to control the operation of the comparator 2. This comparator can emit data or PC couples, trigger the ETM, or generate a watchpoint depending on the operation defined by FUNCTION. |
function3 | Function 3 Use the DWT Function Registers 3 to control the operation of the comparator 3. This comparator can emit data or PC couples, trigger the ETM, or generate a watchpoint depending on the operation defined by FUNCTION. |
lsucnt | LSU Count This register is used to count the total number of cycles during which the processor is processing an LSU operation beyond the first cycle. |
mask0 | Mask 0 Use the DWT Mask Registers 0 to apply a mask to data addresses when matching against COMP0. |
mask1 | Mask 1 Use the DWT Mask Registers 1 to apply a mask to data addresses when matching against COMP1. |
mask2 | Mask 2 Use the DWT Mask Registers 2 to apply a mask to data addresses when matching against COMP2. |
mask3 | Mask 3 Use the DWT Mask Registers 3 to apply a mask to data addresses when matching against COMP3. |
pcsr | Program Counter Sample This register is used to enable coarse-grained software profiling using a debug agent, without changing the currently executing code. If the core is not in debug state, the value returned is the instruction address of a recently executed instruction. If the core is in debug state, the value returned is 0xFFFFFFFF. |
sleepcnt | Sleep Count This register is used to count the total number of cycles during which the processor is sleeping. |
Structs
COMP0 | Comparator 0 This register is used to write the reference value for comparator 0. |
COMP1 | Comparator 1 This register is used to write the reference value for comparator 1. |
COMP2 | Comparator 2 This register is used to write the reference value for comparator 2. |
COMP3 | Comparator 3 This register is used to write the reference value for comparator 3. |
CPICNT | CPI Count This register is used to count the total number of instruction cycles beyond the first cycle. |
CTRL | Control Use the DWT Control Register to enable the DWT unit. |
CYCCNT | Current PC Sampler Cycle Count This register is used to count the number of core cycles. This counter can measure elapsed execution time. This is a free-running counter (this counter will not advance in power modes where free-running clock to CPU stops). The counter has three functions: 1: When CTRL.PCSAMPLEENA = 1, the PC is sampled and emitted when the selected tapped bit changes value (0 to 1 or 1 to 0) and any post-scalar value counts to 0. 2: When CTRL.CYCEVTENA = 1 , (and CTRL.PCSAMPLEENA = 0), an event is emitted when the selected tapped bit changes value (0 to 1 or 1 to 0) and any post-scalar value counts to 0. 3: Applications and debuggers can use the counter to measure elapsed execution time. By subtracting a start and an end time, an application can measure time between in-core clocks (other than when Halted in debug). This is valid to 2^32 core clock cycles (for example, almost 89.5 seconds at 48MHz). |
EXCCNT | Exception Overhead Count This register is used to count the total cycles spent in interrupt processing. |
FOLDCNT | Fold Count This register is used to count the total number of folded instructions. The counter increments on each instruction which takes 0 cycles. |
FUNCTION0 | Function 0 Use the DWT Function Registers 0 to control the operation of the comparator 0. This comparator can: 1. Match against either the PC or the data address. This is controlled by CYCMATCH. This function is only available for comparator 0 (COMP0). 2. Emit data or PC couples, trigger the ETM, or generate a watchpoint depending on the operation defined by FUNCTION. |
FUNCTION1 | Function 1 Use the DWT Function Registers 1 to control the operation of the comparator 1. This comparator can: 1. Perform data value comparisons if associated address comparators have performed an address match. This function is only available for comparator 1 (COMP1). 2. Emit data or PC couples, trigger the ETM, or generate a watchpoint depending on the operation defined by FUNCTION. |
FUNCTION2 | Function 2 Use the DWT Function Registers 2 to control the operation of the comparator 2. This comparator can emit data or PC couples, trigger the ETM, or generate a watchpoint depending on the operation defined by FUNCTION. |
FUNCTION3 | Function 3 Use the DWT Function Registers 3 to control the operation of the comparator 3. This comparator can emit data or PC couples, trigger the ETM, or generate a watchpoint depending on the operation defined by FUNCTION. |
LSUCNT | LSU Count This register is used to count the total number of cycles during which the processor is processing an LSU operation beyond the first cycle. |
MASK0 | Mask 0 Use the DWT Mask Registers 0 to apply a mask to data addresses when matching against COMP0. |
MASK1 | Mask 1 Use the DWT Mask Registers 1 to apply a mask to data addresses when matching against COMP1. |
MASK2 | Mask 2 Use the DWT Mask Registers 2 to apply a mask to data addresses when matching against COMP2. |
MASK3 | Mask 3 Use the DWT Mask Registers 3 to apply a mask to data addresses when matching against COMP3. |
PCSR | Program Counter Sample This register is used to enable coarse-grained software profiling using a debug agent, without changing the currently executing code. If the core is not in debug state, the value returned is the instruction address of a recently executed instruction. If the core is in debug state, the value returned is 0xFFFFFFFF. |
RegisterBlock | Register block |
SLEEPCNT | Sleep Count This register is used to count the total number of cycles during which the processor is sleeping. |