Page Comparison

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CPU

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_TS_TmrRd()

Anchor10534991053499Application-defined function to get current CPU timestamp timer count.anchor10541171054117

Files

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cpu_core.h / Application’s cpu_bsp.c Anchor10541221054122

Prototype

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Arguments

Anchor10535071053507None.anchor10535081053508

Returned Value

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CPU timestamp timer count value. Anchor10535101053510

Required Configuration

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CPU_TS_TmrRd() is an application/BSP function that must be defined by the developer if either of the following CPU features is enabled in cpu_cfg.h :anchor10567701056770

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Notes / Warnings

Anchor10535181053518CPU timestamp timer count values must be returned via word-size-configurable CPU_TS_TMR data type. If timer has more bits, truncate timer values’ higher-order bits greater than the configured CPU_TS_TMR timestamp timer data type word size. However, since the timer must not have less bits than the configured CPU_TS_TMR timestamp timer data type word size; CPU_CFG_TS_TMR_SIZE must be configured so that all bits in CPU_TS_TMR data type are significant. In other words, if timer size is not a binary-multiple of 8-bit octets (e.g. 20-bits or even 24-bits), then the next lower, binary-multiple octet word size should be configured (e.g. to 16-bits). However, the minimum supported word size for CPU timestamp timers is 8-bits.anchor

10535191053519CPU timestamp timer should be an ‘up’ counter whose values increase with each time count. If timer is a ‘down’ counter whose values decrease with each time count, then the returned timer value must be ones-complemented. Anchor10535201053520

When applicable, CPU timestamp timer period should be less than the typical measured time but must be less than the maximum measured time; otherwise, timer resolution inadequate to measure desired times. Anchor10537781053778

Example Template

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16-bit Up Timer Example

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16

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-bit

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Down Timer Example

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32-bit Up Timer Example

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48-bit Down Timer Example

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