/**
* @brief Initializes CEC low level.
* @param None
* @retval None
*/
void HDMI_CEC_IO_Init (void)
{
GPIO_InitTypeDef GPIO_InitStruct;
/* Enable CEC clock */
__CEC_CLK_ENABLE();
/* Enable CEC LINE GPIO clock */
HDMI_CEC_LINE_CLK_ENABLE();
/* Configure CEC LINE GPIO as alternate function open drain */
GPIO_InitStruct.Pin = HDMI_CEC_LINE_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Alternate = HDMI_CEC_LINE_AF;
HAL_GPIO_Init(HDMI_CEC_LINE_GPIO_PORT, &GPIO_InitStruct);
/* CEC IRQ Channel configuration */
HAL_NVIC_SetPriority((IRQn_Type)HDMI_CEC_IRQn, 0xF, 0x0);
HAL_NVIC_EnableIRQ((IRQn_Type)HDMI_CEC_IRQn);
/* Enable CEC HPD SINK GPIO clock */
HDMI_CEC_HPD_SINK_CLK_ENABLE();
/* Configure CEC HPD SINK GPIO as output push pull */
GPIO_InitStruct.Pin = HDMI_CEC_HPD_SINK_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Speed = GPIO_SPEED_LOW;
GPIO_InitStruct.Pull = GPIO_PULLDOWN;
HAL_GPIO_Init(HDMI_CEC_HPD_SINK_GPIO_PORT, &GPIO_InitStruct);
I2C1_Init();
/* Enable CEC HPD SOURCE GPIO clock */
HDMI_CEC_HPD_SOURCE_CLK_ENABLE();
/* Configure CEC HPD SOURCE GPIO as output push pull */
GPIO_InitStruct.Pin = HDMI_CEC_HPD_SOURCE_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Speed = GPIO_SPEED_LOW;
GPIO_InitStruct.Pull = GPIO_PULLDOWN;
HAL_GPIO_Init(HDMI_CEC_HPD_SOURCE_GPIO_PORT, &GPIO_InitStruct);
I2C2_Init();
}
/**
* @brief CEC MSP Initialization
* This function configures the hardware resources used in this example:
* - Peripheral's clock enable
* - Peripheral's GPIO Configuration
* @param hcec: CEC handle pointer
* @retval None
*/
void HAL_CEC_MspInit(CEC_HandleTypeDef *hcec)
{
GPIO_InitTypeDef GPIO_InitStruct;
/* Enable CEC clock */
__CEC_CLK_ENABLE();
/* Enable GPIO clock and initialize GPIO */
HDMI_CEC_LINE_CLK_ENABLE();
GPIO_InitStruct.Pin = HDMI_CEC_LINE_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
GPIO_InitStruct.Alternate = HDMI_CEC_LINE_AF;
HAL_GPIO_Init(HDMI_CEC_LINE_GPIO_PORT, &GPIO_InitStruct);
/* Enable and set CEC Interrupt to the lowest priority */
HAL_NVIC_SetPriority(HDMI_CEC_IRQn, 0x0F, 0);
HAL_NVIC_EnableIRQ(HDMI_CEC_IRQn);
}
