/*****************************************************************************
* Function: Init
*
* Description:
*****************************************************************************/
void OutputPin::Init
(
pin_level_t pin_level // Starting level (high/low) of pin.
)
{
assert_param(IS_GPIO_ALL_PERIPH(this->port));
assert_param(IS_GET_GPIO_PIN(this->pin));
assert_param(IS_RCC_AHB1_CLOCK_PERIPH(this->clock));
// Peripheral clock enable.
RCC_AHB1PeriphClockCmd(this->clock, ENABLE);
// Configure pin in output pushpull mode.
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = this->pin;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(this->port, &GPIO_InitStructure);
// Initialize pin level and field.
if (pin_level == HIGH)
{
WriteHigh();
}
else
{
WriteLow();
}
} // OutputPin::Init()
/**
* @brief Sets or clears the selected data port bit.
* @param GPIOx: where x can be (A, B or C) to select the GPIO peripheral.
* @param GPIO_Pin: specifies the port bit to be written.
* This parameter can be one of GPIO_Pin_x where x can be (0..7).
* @param BitVal: specifies the value to be written to the selected bit.
* This parameter can be one of the BitAction enum values:
* @arg Bit_RESET: to clear the port pin
* @arg Bit_SET: to set the port pin
* @retval None
*/
void GPIO_WriteBit(GPIO_TypeDef* GPIOx, uint32_t GPIO_Pin, BitAction BitVal)
{
/* Check the parameters */
assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
assert_param(IS_GET_GPIO_PIN(GPIO_Pin));
assert_param(IS_GPIO_BIT_ACTION(BitVal));
if (BitVal != Bit_RESET)
{
GPIOx->BSR = GPIO_Pin;
}
else
{
GPIOx->BRR = GPIO_Pin ;
}
}
/**
* @brief Reads the specified input port pin.
* @param GPIOx: where x can be (A, B or C) to select the GPIO peripheral.
* @param GPIO_Pin: specifies the port bit to read.
* This parameter can be GPIO_Pin_x where x can be (0..7).
* @retval The input port pin value.
*/
uint32_t GPIO_ReadInputDataBit(GPIO_TypeDef* GPIOx, uint32_t GPIO_Pin)
{
uint32_t bitstatus = 0x00;
/* Check the parameters */
assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
assert_param(IS_GET_GPIO_PIN(GPIO_Pin));
if ((GPIOx->IDR & GPIO_Pin) != (uint32_t)Bit_RESET)
{
bitstatus = (uint32_t)Bit_SET;
}
else
{
bitstatus = (uint32_t)Bit_RESET;
}
return bitstatus;
}
/*****************************************************************************
* Function: Init
*
* Description:
*****************************************************************************/
void InputPin::Init(void)
{
assert_param(IS_GPIO_ALL_PERIPH(this->port));
assert_param(IS_GET_GPIO_PIN(this->pin));
assert_param(IS_RCC_AHB1_CLOCK_PERIPH(this->clock));
// Peripheral clock enable.
RCC_AHB1PeriphClockCmd(this->clock, ENABLE);
// Configure pin in input pushpull mode.
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = this->pin;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(this->port, &GPIO_InitStructure);
} // InputPin::Init()
/*****************************************************************************
* Function: Init
*
* Description:
*****************************************************************************/
void AlternateFunctionPin::Init(void)
{
assert_param(IS_GPIO_ALL_PERIPH(this->port));
assert_param(IS_GET_GPIO_PIN(this->pin));
assert_param(IS_GPIO_PIN_SOURCE(this->pin_source));
assert_param(IS_GPIO_AF(this->alternate_function));
assert_param(IS_RCC_AHB1_CLOCK_PERIPH(this->clock));
// Peripheral clock enable.
RCC_AHB1PeriphClockCmd(this->clock, ENABLE);
// Configure pin in alternate function mode.
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = this->pin;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(this->port, &GPIO_InitStructure);
GPIO_PinAFConfig(this->port, this->pin_source, this->alternate_function);
} // AlternateFunctionPin::Init()
