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arch/arm/src/stm32l4: peripheral voltage monitor support for vddio2

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Signed-off-by: Harri Luhtala <harri.luhtala@haltian.com>
This commit is contained in:
Harri Luhtala 2022-03-21 15:48:53 +02:00 committed by Xiang Xiao
parent 757d01d915
commit 2ee12b2c5d
2 changed files with 135 additions and 6 deletions
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105
arch/arm/src/stm32l4/stm32l4_pwr.c
View File

@ -213,15 +213,13 @@ bool stm32l4_pwr_enableusv(bool set)
}
/****************************************************************************
* Name: stm32l4_pwr_vddio2_valid
* Name: stm32l4_pwr_enable_pvme2
*
* Description:
* Report that the Vddio2 independent I/Os supply voltage is valid or not.
* Setting this bit is mandatory to use the PG2 - PG15 I/Os.
* Enables or disables the peripheral voltage monitoring for Vddio2.
*
* Input Parameters:
* set - True: Vddio2 is value; False: Vddio2 is not present. Logical and
* electrical isolation is applied to ignore this supply.
* set - True: Vddio2 monitoring enable; False: Vddio2 monitoring disable.
*
* Returned Value:
* True: The bit was previously set.
@ -229,6 +227,103 @@ bool stm32l4_pwr_enableusv(bool set)
****************************************************************************/
#if !defined(CONFIG_STM32L4_STM32L4X3)
bool stm32l4_pwr_enable_pvme2(bool set)
{
uint32_t regval;
bool was_set;
bool was_clk_enabled;
regval = getreg32(STM32L4_RCC_APB1ENR1);
was_clk_enabled = ((regval & RCC_APB1ENR1_PWREN) != 0);
if (!was_clk_enabled)
{
stm32l4_pwr_enableclk(true);
}
/* Get the current state of the STM32L4 PWR control register 2 */
regval = stm32l4_pwr_getreg(STM32L4_PWR_CR2_OFFSET);
was_set = ((regval & PWR_CR2_PVME2) != 0);
/* Enable or disable the ability to write */
if (was_set && !set)
{
/* Disable the Vddio2 monitoring */
regval &= ~PWR_CR2_PVME2;
stm32l4_pwr_putreg(STM32L4_PWR_CR2_OFFSET, regval);
}
else if (!was_set && set)
{
/* Enable the Vddio2 monitoring */
regval |= PWR_CR2_PVME2;
stm32l4_pwr_putreg(STM32L4_PWR_CR2_OFFSET, regval);
}
if (!was_clk_enabled)
{
stm32l4_pwr_enableclk(false);
}
return was_set;
}
/****************************************************************************
* Name: stm32l4_pwr_get_pvmo2
*
* Description:
* Get value of peripheral voltage monitor output 2 (Vddio2).
*
* Returned Value:
* True: Vddio2 voltage is below PVM2 threshold.
* False: Vddio2 voltage is above PVM2 threshold.
*
****************************************************************************/
bool stm32l4_pwr_get_pvmo2(void)
{
uint32_t regval;
bool was_clk_enabled;
regval = getreg32(STM32L4_RCC_APB1ENR1);
was_clk_enabled = ((regval & RCC_APB1ENR1_PWREN) != 0);
if (!was_clk_enabled)
{
stm32l4_pwr_enableclk(true);
}
/* Get the current state of the STM32L4 SR2 control register 2 */
regval = stm32l4_pwr_getreg(STM32L4_PWR_SR2_OFFSET);
if (!was_clk_enabled)
{
stm32l4_pwr_enableclk(false);
}
return !!(regval & PWR_SR2_PVMO2);
}
/****************************************************************************
* Name: stm32l4_pwr_vddio2_valid
*
* Description:
* Report that the Vddio2 independent I/Os supply voltage is valid or not.
* Setting this bit is mandatory to use the PG2 - PG15 I/Os.
*
* Input Parameters:
* set - True: Vddio2 is valid; False: Vddio2 is not present. Logical and
* electrical isolation is applied to ignore this supply.
*
* Returned Value:
* True: The bit was previously set.
*
****************************************************************************/
bool stm32l4_pwr_vddio2_valid(bool set)
{
uint32_t regval;

36
arch/arm/src/stm32l4/stm32l4_pwr.h
View File

@ -105,6 +105,40 @@ bool stm32l4_pwr_enablebkp(bool writable);
bool stm32l4_pwr_enableusv(bool set);
/****************************************************************************
* Name: stm32l4_pwr_enable_pvme2
*
* Description:
* Enables or disables the peripheral voltage monitoring for Vddio2.
*
* Input Parameters:
* set - True: Vddio2 monitoring enable; False: Vddio2 monitoring disable.
*
* Returned Value:
* True: The bit was previously set.
*
****************************************************************************/
#if !defined(CONFIG_STM32L4_STM32L4X3)
bool stm32l4_pwr_enable_pvme2(bool set);
#endif
/****************************************************************************
* Name: stm32l4_pwr_get_pvmo2
*
* Description:
* Get value of peripheral voltage monitor output 2 (Vddio2).
*
* Returned Value:
* True: Vddio2 voltage is below PVM2 threshold.
* False: Vddio2 voltage is above PVM2 threshold.
*
****************************************************************************/
#if !defined(CONFIG_STM32L4_STM32L4X3)
bool stm32l4_pwr_get_pvmo2(void);
#endif
/****************************************************************************
* Name: stm32l4_pwr_vddio2_valid
*
@ -113,7 +147,7 @@ bool stm32l4_pwr_enableusv(bool set);
* Setting this bit is mandatory to use the PG2 - PG15 I/Os.
*
* Input Parameters:
* set - True: Vddio2 is value; False: Vddio2 is not present. Logical and
* set - True: Vddio2 is valid; False: Vddio2 is not present. Logical and
* electrical isolation is applied to ignore this supply.
*
* Returned Value: