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Allow to use all STM32 targets prescaler for LPTIM #15051

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Merged
merged 2 commits into from
Sep 10, 2021
Merged

Allow to use all STM32 targets prescaler for LPTIM #15051

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1ad23b8
Allow more target prescaler for LPTIM
hallard Sep 3, 2021
81876a0
added disclaimers
hallard Sep 6, 2021
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12 changes: 11 additions & 1 deletion targets/TARGET_STM/lp_ticker.c
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Original file line number Diff line number Diff line change
Expand Up @@ -242,7 +242,17 @@ void lp_ticker_init(void)
LptimHandle.State = HAL_LPTIM_STATE_RESET;
LptimHandle.Init.Clock.Source = LPTIM_CLOCKSOURCE_APBCLOCK_LPOSC;
#if defined(MBED_CONF_TARGET_LPTICKER_LPTIM_CLOCK)
#if (MBED_CONF_TARGET_LPTICKER_LPTIM_CLOCK == 4)
#if (MBED_CONF_TARGET_LPTICKER_LPTIM_CLOCK == 128)
LptimHandle.Init.Clock.Prescaler = LPTIM_PRESCALER_DIV128;
#elif (MBED_CONF_TARGET_LPTICKER_LPTIM_CLOCK == 64)
LptimHandle.Init.Clock.Prescaler = LPTIM_PRESCALER_DIV64;
#elif (MBED_CONF_TARGET_LPTICKER_LPTIM_CLOCK == 32)
LptimHandle.Init.Clock.Prescaler = LPTIM_PRESCALER_DIV32;
#elif (MBED_CONF_TARGET_LPTICKER_LPTIM_CLOCK == 16)
LptimHandle.Init.Clock.Prescaler = LPTIM_PRESCALER_DIV16;
#elif (MBED_CONF_TARGET_LPTICKER_LPTIM_CLOCK == 8)
LptimHandle.Init.Clock.Prescaler = LPTIM_PRESCALER_DIV8;
#elif (MBED_CONF_TARGET_LPTICKER_LPTIM_CLOCK == 4)
LptimHandle.Init.Clock.Prescaler = LPTIM_PRESCALER_DIV4;
#elif (MBED_CONF_TARGET_LPTICKER_LPTIM_CLOCK == 2)
LptimHandle.Init.Clock.Prescaler = LPTIM_PRESCALER_DIV2;
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5 changes: 3 additions & 2 deletions targets/targets.json
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Original file line number Diff line number Diff line change
Expand Up @@ -1256,8 +1256,9 @@
"macro_name": "LPTICKER_DELAY_TICKS"
},
"lpticker_lptim_clock": {
"help": "Default value for LPTIM clock (lpticker_lptim == 1). Value is the dividing factor. Choose 1, 2 or 4",
"value": 1
"help": "Default value for LPTIM clock (lpticker_lptim == 1). Value is the dividing factor. Choose 1, 2, 4, 8, 16, 32, 64 or 128",
"value": 1,
"constraint": "Disclaimers : values from 8 to 128 have impacts on mbed-os timer precision and therefore on scheduling. It's not supported by mbed-os. Use it if you know what you're doing such as long low power sleep."
},
"gpio_reset_at_init": {
"help": "if value set, all GPIO are reset during init",
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