/**
* @brief Initialize GPIO registers according to the specified parameters in GPIO_InitStruct.
* @param GPIOx GPIO Port
* @param GPIO_InitStruct: pointer to a @ref LL_GPIO_InitTypeDef structure
* that contains the configuration information for the specified GPIO peripheral.
* @retval An ErrorStatus enumeration value:
* - SUCCESS: GPIO registers are initialized according to GPIO_InitStruct content
* - ERROR: Not applicable
*/
ErrorStatus LL_GPIO_Init(GPIO_TypeDef *GPIOx, LL_GPIO_InitTypeDef *GPIO_InitStruct)
{
uint32_t pinmask;
uint32_t pinpos;
uint32_t currentpin;
/* Check the parameters */
assert_param(IS_GPIO_ALL_INSTANCE(GPIOx));
assert_param(IS_LL_GPIO_PIN(GPIO_InitStruct->Pin));
/* ------------------------- Configure the port pins ---------------- */
/* Initialize pinpos on first pin set */
pinmask = ((GPIO_InitStruct->Pin) << GPIO_PIN_MASK_POS) >> GPIO_PIN_NB;
pinpos = POSITION_VAL(pinmask);
/* Configure the port pins */
while ((pinmask >> pinpos) != 0U)
{
/* skip if bit is not set */
if ((pinmask & (1U << pinpos)) != 0U)
{
/* Get current io position */
if (pinpos < GPIO_PIN_MASK_POS)
{
currentpin = (0x00000101U << pinpos);
}
else
{
currentpin = ((0x00010001U << (pinpos - GPIO_PIN_MASK_POS)) | 0x04000000U);
}
/* Check Pin Mode and Pin Pull parameters */
assert_param(IS_LL_GPIO_MODE(GPIO_InitStruct->Mode));
assert_param(IS_LL_GPIO_PULL(GPIO_InitStruct->Pull));
/* Pin Mode configuration */
LL_GPIO_SetPinMode(GPIOx, currentpin, GPIO_InitStruct->Mode);
/* Pull-up Pull-down resistor configuration*/
LL_GPIO_SetPinPull(GPIOx, currentpin, GPIO_InitStruct->Pull);
if ((GPIO_InitStruct->Mode == LL_GPIO_MODE_OUTPUT) || (GPIO_InitStruct->Mode == LL_GPIO_MODE_ALTERNATE))
{
/* Check speed and Output mode parameters */
assert_param(IS_LL_GPIO_SPEED(GPIO_InitStruct->Speed));
assert_param(IS_LL_GPIO_OUTPUT_TYPE(GPIO_InitStruct->OutputType));
/* Speed mode configuration */
LL_GPIO_SetPinSpeed(GPIOx, currentpin, GPIO_InitStruct->Speed);
/* Output mode configuration*/
LL_GPIO_SetPinOutputType(GPIOx, currentpin, GPIO_InitStruct->OutputType);
}
}
pinpos++;
}
return (SUCCESS);
}
/**
* @brief Initialize GPIO registers according to the specified parameters in GPIO_InitStruct.
* @param GPIOx GPIO Port
* @param GPIO_InitStruct: pointer to a @ref LL_GPIO_InitTypeDef structure
* that contains the configuration information for the specified GPIO peripheral.
* @retval An ErrorStatus enumeration value:
* - SUCCESS: GPIO registers are initialized according to GPIO_InitStruct content
* - ERROR: Not applicable
*/
ErrorStatus LL_GPIO_Init(GPIO_TypeDef *GPIOx, LL_GPIO_InitTypeDef *GPIO_InitStruct)
{
uint32_t pinpos = 0x00000000U;
uint32_t currentpin = 0x00000000U;
/* Check the parameters */
assert_param(IS_GPIO_ALL_INSTANCE(GPIOx));
assert_param(IS_LL_GPIO_PIN(GPIO_InitStruct->Pin));
assert_param(IS_LL_GPIO_MODE(GPIO_InitStruct->Mode));
assert_param(IS_LL_GPIO_PULL(GPIO_InitStruct->Pull));
/* ------------------------- Configure the port pins ---------------- */
/* Initialize pinpos on first pin set */
/* pinpos = 0; useless as already done in default initialization */
/* Configure the port pins */
while (((GPIO_InitStruct->Pin) >> pinpos) != 0x00000000U)
{
/* Get current io position */
currentpin = (GPIO_InitStruct->Pin) & (0x00000001U << pinpos);
if (currentpin)
{
/* Pin Mode configuration */
LL_GPIO_SetPinMode(GPIOx, currentpin, GPIO_InitStruct->Mode);
if ((GPIO_InitStruct->Mode == LL_GPIO_MODE_OUTPUT) || (GPIO_InitStruct->Mode == LL_GPIO_MODE_ALTERNATE))
{
/* Check Speed mode parameters */
assert_param(IS_LL_GPIO_SPEED(GPIO_InitStruct->Speed));
/* Speed mode configuration */
LL_GPIO_SetPinSpeed(GPIOx, currentpin, GPIO_InitStruct->Speed);
}
/* Pull-up Pull down resistor configuration*/
LL_GPIO_SetPinPull(GPIOx, currentpin, GPIO_InitStruct->Pull);
if (GPIO_InitStruct->Mode == LL_GPIO_MODE_ALTERNATE)
{
/* Check Alternate parameter */
assert_param(IS_LL_GPIO_ALTERNATE(GPIO_InitStruct->Alternate));
/* Speed mode configuration */
if (currentpin < LL_GPIO_PIN_8)
{
LL_GPIO_SetAFPin_0_7(GPIOx, currentpin, GPIO_InitStruct->Alternate);
}
else
{
LL_GPIO_SetAFPin_8_15(GPIOx, currentpin, GPIO_InitStruct->Alternate);
}
}
}
pinpos++;
}
if ((GPIO_InitStruct->Mode == LL_GPIO_MODE_OUTPUT) || (GPIO_InitStruct->Mode == LL_GPIO_MODE_ALTERNATE))
{
/* Check Output mode parameters */
assert_param(IS_LL_GPIO_OUTPUT_TYPE(GPIO_InitStruct->OutputType));
/* Output mode configuration*/
LL_GPIO_SetPinOutputType(GPIOx, GPIO_InitStruct->Pin, GPIO_InitStruct->OutputType);
}
return (SUCCESS);
}