#define CLK_FREQ    ( 10000 )
#define CORE_FREQ ( 168000000 ) static void TIM_GPIO_Config( void )
{
GPIO_InitTypeDef GPIO_InitStructure; // Enable GPIOA clock
__HAL_RCC_GPIOA_CLK_ENABLE( ); // Configure PA8 pin as CLK output -- to CK Input
GPIO_InitStructure.Mode = GPIO_MODE_AF_PP;
GPIO_InitStructure.Pull = GPIO_NOPULL;
GPIO_InitStructure.Pin = GPIO_PIN_8;
GPIO_InitStructure.Speed = GPIO_SPEED_HIGH;
GPIO_InitStructure.Alternate = GPIO_AF1_TIM1; HAL_GPIO_Init( GPIOA, &GPIO_InitStructure ); // Enable GPIOC clock
__HAL_RCC_GPIOC_CLK_ENABLE( ); // Configure PC7 pin as CK input -- from CLK Output
// Can not uses GPIO_MODE_INPUT : AF = 0
GPIO_InitStructure.Mode = GPIO_MODE_AF_PP; // AF = 3
GPIO_InitStructure.Pull = GPIO_NOPULL;
GPIO_InitStructure.Pin = GPIO_PIN_7;
GPIO_InitStructure.Speed = GPIO_SPEED_HIGH;
GPIO_InitStructure.Alternate = GPIO_AF3_TIM8;
HAL_GPIO_Init( GPIOC, &GPIO_InitStructure ); // Configure PC6 pin as CK output -- to Oscilloscope Display
GPIO_InitStructure.Mode = GPIO_MODE_AF_PP;
GPIO_InitStructure.Pull = GPIO_NOPULL;
GPIO_InitStructure.Pin = GPIO_PIN_6;
GPIO_InitStructure.Speed = GPIO_SPEED_HIGH;
GPIO_InitStructure.Alternate = GPIO_AF3_TIM8;
HAL_GPIO_Init( GPIOC, &GPIO_InitStructure );
} TIM_HandleTypeDef TimHandle;
TIM_MasterConfigTypeDef sMasterConfig;
TIM_SlaveConfigTypeDef sSlaveConfig; TIM_OC_InitTypeDef sConfig; static void Error_Handler( void )
{
while ( )
{
}
} void TIM_CLK_Output( void )
{
__HAL_RCC_TIM1_CLK_ENABLE( )
; TimHandle.Instance = TIM1; TimHandle.Init.Period = ;
TimHandle.Init.Prescaler = CORE_FREQ / CLK_FREQ - ;
TimHandle.Init.ClockDivision = ;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
if ( HAL_TIM_PWM_Init( &TimHandle ) != HAL_OK )
Error_Handler( ); sConfig.OCMode = TIM_OCMODE_PWM1;
sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfig.OCFastMode = TIM_OCFAST_DISABLE;
sConfig.Pulse = ;
if ( HAL_TIM_PWM_ConfigChannel( &TimHandle, &sConfig, TIM_CHANNEL_1 ) != HAL_OK )
Error_Handler( ); if ( HAL_TIM_PWM_Start( &TimHandle, TIM_CHANNEL_1 ) != HAL_OK )
Error_Handler( );
} void TIM_CK_Input( void )
{
__HAL_RCC_TIM8_CLK_ENABLE( ); TimHandle.Instance = TIM8; TIM_IC_InitTypeDef IC_InitTypeDef;
IC_InitTypeDef.ICFilter = ;
IC_InitTypeDef.ICPolarity = TIM_ICPOLARITY_BOTHEDGE;
IC_InitTypeDef.ICPrescaler = TIM_ICPSC_DIV1;
IC_InitTypeDef.ICSelection = TIM_ICSELECTION_DIRECTTI; // TIM8_CH2 : PC7
HAL_TIM_IC_ConfigChannel( &TimHandle, &IC_InitTypeDef, TIM_CHANNEL_2 ); TIM_ClockConfigTypeDef ClockConfig;
ClockConfig.ClockFilter = ;
ClockConfig.ClockPolarity = TIM_CLOCKPOLARITY_BOTHEDGE;
ClockConfig.ClockPrescaler = TIM_CLOCKPRESCALER_DIV1;
ClockConfig.ClockSource = TIM_CLOCKSOURCE_TI2; // TIM8_CH2 : PC7
HAL_TIM_ConfigClockSource( &TimHandle, &ClockConfig ); TimHandle.Init.Period = ;
TimHandle.Init.Prescaler = ;
TimHandle.Init.ClockDivision = ;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
if ( HAL_TIM_Base_Init( &TimHandle ) != HAL_OK )
Error_Handler( ); if ( HAL_TIM_Base_Start( &TimHandle ) != HAL_OK )
Error_Handler( );
} void TIM_CK_Output( void )
{
TimHandle.Instance = TIM8; sConfig.OCMode = TIM_OCMODE_PWM1;
sConfig.OCPolarity = TIM_OCPOLARITY_LOW; // Inverted CK_Input
sConfig.OCFastMode = TIM_OCFAST_DISABLE;
sConfig.Pulse = ;
if ( HAL_TIM_PWM_ConfigChannel( &TimHandle, &sConfig, TIM_CHANNEL_1 ) != HAL_OK )
Error_Handler( ); if ( HAL_TIM_PWM_Start( &TimHandle, TIM_CHANNEL_1 ) != HAL_OK )
Error_Handler( );
} void Timer_Demo( void )
{
TIM_GPIO_Config( );
TIM_CLK_Output( ); // To CK_Input 5 KHz
TIM_CK_Input( ); // From CLK_Output 5 KHz
TIM_CK_Output( ); // PWM Output 5 KHz -- Inverted CL_Output with Delay while ( )
{
}
}

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