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void | halInternalStartSymbolTimer (void) |
| Initializes the symbol timer. When a dedicated symbol timer peripheral exists (e.g. EM2xx, EM3xx) this initialization is generally performed directly by the PHY, so this routine may be a no-op.
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uint32_t | halStackGetInt32uSymbolTick (void) |
| Returns the current symbol time in symbol ticks (units are platform-dependent, but typically on the order of microseconds).
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bool | halStackInt32uSymbolTickGTorEqual (uint32_t st1, uint32_t st2) |
| Returns true if symbol tick time st1 is greater than symbol tick time st2, as determined by half the range of the symbol timer. Can only account for 1 wrap around between st1 and st2 before it is wrong.
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uint32_t | halStackGetSymbolTicksPerSecond (void) |
| Obtains the number of symtol timer ticks in one second of real time. Can be used for conversion between real time and symbol ticks.
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See symbol-timer.h
for source code.
Enumerator |
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EM_HAL_SYMBOL_DELAY_CHANNEL_A |
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EM_HAL_SYMBOL_DELAY_CHANNEL_B |
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EM_HAL_SYMBOL_DELAY_CHANNELS |
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void halInternalStartSymbolTimer |
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void |
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- Parameters
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- Note
- If cancelled prior to the delay expiring, the original callback will not be called.
void halStackCancelSymbolDelayA |
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void |
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uint32_t halStackGetInt32uSymbolTick |
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void |
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- Returns
- The least significant 32 bits of the current symbol time in symbol timer ticks.
uint32_t halStackGetSymbolTicksPerSecond |
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void |
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- Returns
- How many symbol ticks occur in a second.
bool halStackInt32uSymbolTickGTorEqual |
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uint32_t |
st1, |
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uint32_t |
st2 |
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) |
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void halStackOrderInt16uSymbolDelayA |
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uint16_t |
symbols | ) |
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Used by the MAC to request an interrupt callback at a specified amount of time in the future.
- Parameters
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symbols | The delay, in symbols. |
Used by the MAC to request an interrupt callback at a specified number of symbol timer ticks in the future.
- Parameters
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delayChan | The symbol timer delay channel to use. |
callback | The callback to call in interrupt context when the delay expires. If NULL, the timer is not actually started, but the return value is accurate; useful for polling. |
microseconds | The delay, in units of microseconds. |
- Returns
- The absolute symbol tick value of the delay (usually in the future).
- Note
- Internal conversion of microseconds to symbol ticks will use a rounding function.
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No minimum delay is enforced; short delays may trigger the callback immediately, before this routine returns to its caller.
void halStackSymbolDelayAIsr |
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void |
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