24 lines
1.2 KiB
Plaintext
24 lines
1.2 KiB
Plaintext
/*
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* Debug support for low-power modes
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* To enter low-power mode, the instruction WFI or WFE must be executed.
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* The MCU implements several low-power modes which can either deactivate the CPU clock
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* or reduce the power of the CPU.
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* The core does not allow FCLK or HCLK to be turned off during a debug session. As these
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* are required for the debugger connection, during a debug, they must remain active. The
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* MCU integrates special means to allow the user to debug software in low-power modes.
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* For this, the debugger host must first set some debug configuration registers to change the
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* low-power mode behavior:
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* In Sleep mode, DBG_SLEEP bit of DBGMCU_CR register must be previously set by
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* the debugger. This will feed HCLK with the same clock that is provided to FCLK
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* (system clock previously configured by the software).
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* In Stop mode, the bit DBG_STOP must be previously set by the debugger. This will
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* enable the internal RC oscillator clock to feed FCLK and HCLK in STOP mode.
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*/
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execUserExecutionStarted()
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{
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if (!__driverType("sim"))
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{
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__writeMemory32(__readMemory32(0xE0042004, "Memory") | 0x3, 0xE0042004, "Memory"); // Set DBG_SLEEP and DBG_STOP in DBGMCU_CR
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}
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} |