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pigweed / third_party / github / FreeRTOS / FreeRTOS-Kernel / f508a5f65335174a1d45895ca515e669901df398 / . / FreeRTOS / Demo / ARM9_STR91X_IAR / Library / source / 91x_tim.c
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/******************** (C) COPYRIGHT 2006 STMicroelectronics ********************
* File Name : 91x_tim.c
* Author : MCD Application Team
* Date First Issued : 05/18/2006 : Version 1.0
* Description : This file provides all the TIM software functions.
********************************************************************************
* History:
* 05/22/2007 : Version 1.2
* 05/24/2006 : Version 1.1
* 05/18/2006 : Version 1.0
********************************************************************************
* THE PRESENT SOFTWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS WITH
* CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME. AS
* A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT, INDIRECT
* OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE CONTENT
* OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING INFORMATION
* CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*******************************************************************************/
/* Includes ------------------------------------------------------------------*/
#include "91x_tim.h"
/* Include of other module interface headers ---------------------------------*/
/* Local includes ------------------------------------------------------------*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* TIM Bits Masks */
#define TIM_PWM_MASK 0x0010
#define TIM_OPM_MASK 0x0020
#define TIM_OC1_ENABLE_MASK 0x0040
#define TIM_OC1_DISABLE_MASK 0xFFBF
#define TIM_OC2_ENABLE_MASK 0x0080
#define TIM_OC2_DISABLE_MASK 0xFF7F
#define TIM_OLVL1_SET_MASK 0x0100
#define TIM_OLVL1_RESET_MASK 0xFEFF
#define TIM_OLVL2_SET_MASK 0x0200
#define TIM_OLVL2_RESET_MASK 0xFDFF
#define TIM_ENABLE_MASK 0x8000
#define TIM_DISABLE_MASK 0x7FFF
#define TIM_DMA_CLEAR_MASK 0xCFFF
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Interface functions -------------------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/*******************************************************************************
* Function Name : TIM_DeInit
* Description : Initializes TIM peripheral control and registers to their
* : default reset values.
* Input : TIMx: where x can be from 0 to 3 to select the TIM
* peripheral.
* Output : None
* Return : None
*******************************************************************************/
void TIM_DeInit(TIM_TypeDef *TIMx)
{
if((TIMx == TIM0)||(TIMx == TIM1))
{
SCU_APBPeriphReset(__TIM01, DISABLE); /* TIM0 & TIM1 Reset's off */
}
else
{
SCU_APBPeriphReset(__TIM23, DISABLE); /* TIM2 & TIM3 Reset's off */
}
/* Set all the TIMx registers to thier default values */
TIMx->OC1R = 0x8000;
TIMx->OC2R = 0x8000;
TIMx->CR1 = 0x0;
TIMx->CR2 = 0x1;
TIMx->CNTR = 0x1234;
TIMx->SR = 0x0;
}
/*******************************************************************************
* Function Name : TIM_StructInit
* Description : Fills in a TIM_InitTypeDef structure with the reset value of
* each parameter.
* Input : TIM_InitStruct : pointer to a TIM_InitTypeDef structure
which will be initialized.
* Output : None
* Return : None.
*******************************************************************************/
void TIM_StructInit(TIM_InitTypeDef *TIM_InitStruct)
{
TIM_InitStruct->TIM_Mode = 0x0000;
TIM_InitStruct->TIM_OC1_Modes = 0x0000;
TIM_InitStruct->TIM_OC2_Modes = 0x0000;
TIM_InitStruct->TIM_Clock_Source = 0x0000;
TIM_InitStruct->TIM_Clock_Edge = 0x0000;
TIM_InitStruct->TIM_OPM_INPUT_Edge = 0x0000;
TIM_InitStruct->TIM_ICAP1_Edge = 0x0000;
TIM_InitStruct->TIM_ICAP2_Edge = 0x0000;
TIM_InitStruct->TIM_Prescaler = 0x0000;
TIM_InitStruct->TIM_Pulse_Level_1 = 0x0000;
TIM_InitStruct->TIM_Pulse_Level_2 = 0x0000;
TIM_InitStruct->TIM_Period_Level = 0x0000;
TIM_InitStruct->TIM_Pulse_Length_1 = 0x0000;
TIM_InitStruct->TIM_Pulse_Length_2 = 0x0000;
TIM_InitStruct->TIM_Full_Period = 0x0000;
}
/*******************************************************************************
* Function Name : TIM_Init
* Description : Initializes TIM peripheral according to the specified
* parameters in the TIM_InitTypeDef structure.
* Input1 : TIMx: where x can be from 0 to 3 to select the TIM
* peripheral.
* Input2 : TIM_InitStruct: pointer to a TIM_InitTypeDef structure that
* contains the configuration information for the specified
* TIM peripheral.
* Output : None
* Return : None
*******************************************************************************/
void TIM_Init(TIM_TypeDef *TIMx, TIM_InitTypeDef *TIM_InitStruct)
{
/***************************** Clock configuration ****************************/
if (TIM_InitStruct->TIM_Clock_Source == TIM_CLK_APB)
{
/* APB clock */
TIMx->CR1 &= TIM_CLK_APB;
}
else
{
/* External/SCU clock */
TIMx->CR1 |= TIM_CLK_EXTERNAL;
if (TIM_InitStruct->TIM_Clock_Edge == TIM_CLK_EDGE_RISING)
{
/* Clock rising edge */
TIMx->CR1 |= TIM_CLK_EDGE_RISING;
}
else
{
/* Clock falling edge */
TIMx->CR1 &= TIM_CLK_EDGE_FALLING;
}
}
/************************** Prescaler configuration ***************************/
TIMx->CR2 =( TIMx->CR2 & 0xFF00 )|TIM_InitStruct->TIM_Prescaler ;
/********************************** TIM Modes *********************************/
switch ( TIM_InitStruct->TIM_Mode)
{
/******************************* PWM Input mode *******************************/
case TIM_PWMI:
/* Set the PWMI Bit */
TIMx->CR1 |= TIM_PWMI;
/* Set the first edge Level */
if ( TIM_InitStruct->TIM_ICAP1_Edge == TIM_ICAP1_EDGE_RISING)
{
TIMx->CR1 |= TIM_ICAP1_EDGE_RISING;
}
else
{
TIMx->CR1 &= TIM_ICAP1_EDGE_FALLING;
}
/* Set the Second edge Level ( Opposite of the first level ) */
if ( TIM_InitStruct->TIM_ICAP1_Edge == TIM_ICAP1_EDGE_RISING)
{
TIMx->CR1 &= TIM_ICAP2_EDGE_FALLING;
}
else
{
TIMx->CR1 |= TIM_ICAP2_EDGE_RISING;
}
break;
/************************** Output compare channel 1 **************************/
case TIM_OCM_CHANNEL_1:
if (TIM_InitStruct->TIM_Pulse_Level_1 == TIM_HIGH)
{
TIMx->CR1 |= TIM_OLVL1_SET_MASK;
}
else
{
TIMx->CR1 &= TIM_OLVL1_RESET_MASK;
}
TIMx->OC1R = TIM_InitStruct->TIM_Pulse_Length_1;
if (TIM_InitStruct->TIM_OC1_Modes == TIM_TIMING)
{
TIMx->CR1 &= TIM_OC1_DISABLE_MASK;
}
else
{
TIMx->CR1 |= TIM_OC1_ENABLE_MASK;
}
break;
/************************** Output compare channel 2 **************************/
case TIM_OCM_CHANNEL_2:
if (TIM_InitStruct->TIM_Pulse_Level_2 == TIM_HIGH)
{
TIMx->CR1 |= TIM_OLVL2_SET_MASK;
}
else
{
TIMx->CR1 &= TIM_OLVL2_RESET_MASK;
}
TIMx->OC2R = TIM_InitStruct->TIM_Pulse_Length_2;
if (TIM_InitStruct->TIM_OC2_Modes == TIM_TIMING)
{
TIMx->CR1 &= TIM_OC2_DISABLE_MASK;
}
else
{
TIMx->CR1 |= TIM_OC2_ENABLE_MASK;
}
break;
/************************ Output compare channel 1 & 2 ************************/
case TIM_OCM_CHANNEL_12:
TIMx->OC2R = TIM_InitStruct->TIM_Pulse_Length_2;
TIMx->OC1R = TIM_InitStruct->TIM_Pulse_Length_1;
if (TIM_InitStruct->TIM_OC2_Modes == TIM_TIMING)
{
TIMx->CR1 &= TIM_OC2_DISABLE_MASK;
}
else
{
TIMx->CR1 |= TIM_OC2_ENABLE_MASK;
}
if (TIM_InitStruct->TIM_OC1_Modes == TIM_TIMING)
{
TIMx->CR1 &= TIM_OC1_DISABLE_MASK;
}
else
{
TIMx->CR1 |= TIM_OC1_ENABLE_MASK;
}
if (TIM_InitStruct->TIM_Pulse_Level_1 == TIM_HIGH)
{
TIMx->CR1 |= TIM_OLVL1_SET_MASK;
}
else
{
TIMx->CR1 &= TIM_OLVL1_RESET_MASK;
}
if (TIM_InitStruct->TIM_Pulse_Level_2 == TIM_HIGH)
{
TIMx->CR1 |= TIM_OLVL2_SET_MASK;
}
else
{
TIMx->CR1 &= TIM_OLVL2_RESET_MASK;
}
break;
/********************************** PWM mode **********************************/
case TIM_PWM:
/* Set the Level During the pulse */
if ( TIM_InitStruct->TIM_Pulse_Level_1 == TIM_HIGH)
{
TIMx->CR1 |= TIM_OLVL2_SET_MASK;
}
else
{
TIMx->CR1 &= TIM_OLVL2_RESET_MASK;
}
/* Set the Level after the pulse */
if (TIM_InitStruct->TIM_Period_Level == TIM_HIGH)
{
TIMx->CR1 |= TIM_OLVL1_SET_MASK;
}
else
{
TIMx->CR1 &= TIM_OLVL1_RESET_MASK;
}
/* Set the OCAE */
TIMx->CR1 |= TIM_OC1_ENABLE_MASK;
/* Set the PWM Bit */
TIMx->CR1 |= TIM_PWM_MASK;
/* Set the Duty Cycle value */
TIMx->OC1R = TIM_InitStruct->TIM_Pulse_Length_1 ;
/* Set the Full Period */
TIMx->OC2R = TIM_InitStruct->TIM_Full_Period ;
break;
/******************************* One pulse mode *******************************/
case TIM_OPM:
/* Set the Level During the pulse */
if (TIM_InitStruct->TIM_Pulse_Level_1 == TIM_HIGH)
{
TIMx->CR1 |= TIM_OLVL2_SET_MASK;
}
/* Set the Level after the pulse */
if (TIM_InitStruct->TIM_Period_Level == TIM_HIGH)
{
TIMx->CR1 |= TIM_OLVL1_SET_MASK;
}
/* Set the Activation Edge on the ICAP 1 */
if (TIM_InitStruct->TIM_OPM_INPUT_Edge == TIM_OPM_EDGE_RISING)
{
TIMx->CR1 |= TIM_OPM_EDGE_RISING;
}
/* Set the Output Compare Function */
TIMx->CR1 |= TIM_OC1_ENABLE_MASK;
/* Set the One pulse mode */
TIMx->CR1 |= TIM_OPM_MASK;
/* Set the Pulse length */
TIMx->OC1R = TIM_InitStruct->TIM_Pulse_Length_1;
break;
/*************************** Input capture channel 1 **************************/
case TIM_ICAP_CHANNEL_1:
if (TIM_InitStruct->TIM_ICAP1_Edge == TIM_ICAP1_EDGE_RISING)
{
TIMx->CR1 |= TIM_ICAP1_EDGE_RISING;
}
else
{
TIMx->CR1 &= TIM_ICAP1_EDGE_FALLING;
}
break;
/*************************** Input capture channel 2 **************************/
case TIM_ICAP_CHANNEL_2:
if (TIM_InitStruct->TIM_ICAP2_Edge == TIM_ICAP2_EDGE_RISING)
{
TIMx->CR1 |= TIM_ICAP2_EDGE_RISING;
}
else
{
TIMx->CR1 &= TIM_ICAP2_EDGE_FALLING;
}
break;
/************************* Input capture channel 1 & 2 ************************/
case TIM_ICAP_CHANNEL_12:
if (TIM_InitStruct->TIM_ICAP2_Edge == TIM_ICAP2_EDGE_RISING)
{
TIMx->CR1 |= TIM_ICAP2_EDGE_RISING;
}
else
{
TIMx->CR1 &= TIM_ICAP2_EDGE_FALLING;
}
if (TIM_InitStruct->TIM_ICAP1_Edge == TIM_ICAP1_EDGE_RISING)
{
TIMx->CR1 |= TIM_ICAP1_EDGE_RISING;
}
else
{
TIMx->CR1 &= TIM_ICAP1_EDGE_FALLING;
}
break;
default:
break;
}
}
/*******************************************************************************
* Function Name : TIM_CounterCmd
* Description : Enables or disables TIMx Counter peripheral.
* Input1 : TIMx: where x can be from 0 to 3 to select the TIM
* peripheral.
* Input2 : TIM_operation: specifies the new state of the TIMx Counter.
* This parameter can be one of the following values:
* - TIM_START: Start the timer counter.
* - TIM_STOP : Stop the timer counter.
* - TIM_CLEAR: Clear the timer counter.
* Output : None
* Return : None
*******************************************************************************/
void TIM_CounterCmd(TIM_TypeDef *TIMx, TIM_CounterOperations TIM_operation)
{
switch (TIM_operation)
{
case TIM_START:
TIMx->CR1 |= TIM_ENABLE_MASK;
break;
case TIM_STOP:
TIMx->CR1 &= TIM_DISABLE_MASK;
break;
case TIM_CLEAR:
TIMx->CNTR = 0x1234;
break;
default:
break;
}
}
/*******************************************************************************
* Function Name : TIM_PrescalerConfig
* Description : This routine is used to configure the TIMx prescaler value
* (when using the APB clock).
* Input1 : TIMx: where x can be from 0 to 3 to select the TIM
* peripheral.
* Input2 : TIM_Prescaler: specifies the prescaler value. This parameter
* can be a value from 0x0 to 0xFF.
* Output : None
* Return : None
*******************************************************************************/
void TIM_PrescalerConfig(TIM_TypeDef *TIMx, u8 TIM_Prescaler)
{
TIMx->CR2 &= 0xFF00;
TIMx->CR2 |= TIM_Prescaler;
}
/*******************************************************************************
* Function Name : TIM_GetPrescalerValue
* Description : This routine is used to get the TIMx prescaler value
* (when using the APB clock).
* Input : TIMx: where x can be from 0 to 3 to select the TIM
* peripheral.
* Output : None
* Return : The prescaler value.
*******************************************************************************/
u8 TIM_GetPrescalerValue(TIM_TypeDef *TIMx)
{
return TIMx->CR2 & 0x00FF;
}
/*******************************************************************************
* Function Name : TIM_GetCounterValue
* Description : This routine is used to get the TIMx counter value.
* Input : TIMx: where x can be from 0 to 3 to select the TIM
* peripheral.
* Output : None
* Return : The counter value.
*******************************************************************************/
u16 TIM_GetCounterValue(TIM_TypeDef *TIMx)
{
return TIMx->CNTR;
}
/*******************************************************************************
* Function Name : TIM_GetICAP1Value
* Description : This routine is used to get the Input Capture 1 value.
* Input : TIMx: where x can be from 0 to 3 to select the TIM
* peripheral.
* Output : None
* Return : The Input Capture 1 value.
*******************************************************************************/
u16 TIM_GetICAP1Value(TIM_TypeDef *TIMx)
{
return TIMx->IC1R;
}
/*******************************************************************************
* Function Name : TIM_GetICAP2Value
* Description : This routine is used to get the Input Capture 2 value.
* Input : TIMx: where x can be from 0 to 3 to select the TIM
* peripheral.
* Output : None
* Return : The Input Capture 2 value.
*******************************************************************************/
u16 TIM_GetICAP2Value(TIM_TypeDef *TIMx)
{
return TIMx->IC2R;
}
/*******************************************************************************
* Function Name : TIM_SetPulse
* Description : This routine is used to set the pulse value.
* Input1 : TIMx: where x can be from 0 to 3 to select the TIM
* peripheral.
* Input2 : TIM_Channel: specifies the needed channel.
* This parameter can be one of the following values:
* - TIM_PWM_OC1_Channel: PWM/Output Compare 1 Channel
* - TIM_OC2_Channel : Output Compare 2 Channel
* Input3 : TIM_Pulse: specifies the new pulse value.
* Output : None
* Return : None
*******************************************************************************/
void TIM_SetPulse(TIM_TypeDef *TIMx,u16 TIM_Channel ,u16 TIM_Pulse)
{
if (TIM_Channel == TIM_PWM_OC1_Channel)
{
TIMx->OC1R = TIM_Pulse;
}
else
{
TIMx->OC2R = TIM_Pulse;
}
}
/*******************************************************************************
* Function Name : TIM_GetFlagStatus
* Description : Checks whether the specified TIMx flag is set or not.
* Input1 : TIMx: where x can be from 0 to 3 to select the TIM
* peripheral.
* Input2 : TIM_Flag: specifies the flag to check.
* This parameter can be one of the following values:
* - TIM_FLAG_IC1: Input Capture Channel 1 Flag
* - TIM_FLAG_IC2: Input Capture Channel 2 Flag
* - TIM_FLAG_TO : Timer Overflow Flag
* - TIM_FLAG_OC1: Output Compare Channel 1 Flag
* - TIM_FLAG_OC2: Output Compare Channel 2 Flag
* Output : None
* Return : The NewState of the TIM_Flag (SET or RESET).
*******************************************************************************/
FlagStatus TIM_GetFlagStatus(TIM_TypeDef *TIMx, u16 TIM_Flag)
{
if((TIMx->SR & TIM_Flag) == RESET)
{
return RESET;
}
else
{
return SET;
}
}
/*******************************************************************************
* Function Name : TIM_ClearFlag
* Description : Clears the TIM Flag passed as a parameter.
* Input1 : TIMx: where x can be from 0 to 3 to select the TIM
* peripheral.
* Input2 : TIM_Flag: specifies the flag to clear.
* This parameter can be one of the following values:
* - TIM_FLAG_IC1: Input Capture Channel 1 Flag
* - TIM_FLAG_IC2: Input Capture Channel 2 Flag
* - TIM_FLAG_TO : Timer Overflow Flag
* - TIM_FLAG_OC1: Output Compare Channel 1 Flag
* - TIM_FLAG_OC2: Output Compare Channel 2 Flag
* Output : None
* Return : None
*******************************************************************************/
void TIM_ClearFlag(TIM_TypeDef *TIMx, u16 TIM_Flag)
{
/* Clear TIM_Flag */
TIMx->SR &= ~TIM_Flag;
}
/*******************************************************************************
* Function Name : TIM_GetPWMIPulse
* Description : This routine is used to get the Pulse value in PWMI Mode.
* Input : TIMx: where x can be from 0 to 3 to select the TIM
* peripheral.
* Output : None
* Return : The pulse value.
*******************************************************************************/
u16 TIM_GetPWMIPulse(TIM_TypeDef *TIMx)
{
return TIMx->IC2R;
}
/*******************************************************************************
* Function Name : TIM_GetPWMIPeriod
* Description : This routine is used to get the Period value in PWMI Mode.
* Input : TIMx: where x can be from 0 to 3 to select the TIM
* peripheral.
* Output : None
* Return : The period value.
*******************************************************************************/
u16 TIM_GetPWMIPeriod(TIM_TypeDef *TIMx)
{
return TIMx->IC1R;
}
/*******************************************************************************
* Function Name : TIM_ITConfig
* Description : Configures the Timer interrupt source.
* Input1 : TIMx: where x can be from 0 to 3 to select the TIM
* peripheral.
* Input2 : TIM_IT: specifies the TIM interrupt source to be enabled.
* This parameter can be one of the following values:
* - TIM_IT_IC1: Input Capture 1 Interrupt source.
* - TIM_IT_OC1: Output Compare 1 Interrupt source.
* - TIM_IT_TO : Timer Overflow Interrupt source.
* - TIM_IT_IC2: Input Capture 2 Interrupt source.
* - TIM_IT_OC2: Output Compare 2 Interrupt source.
* Input3 : TIM_Newstate: specifies the new state of the TIMx IT.
* This parameter can be one of the following values:
* - ENABLE : Enable the needed interrupt.
* - DISABLE: Disable the needed interrupt.
* Output : None
* Return : None
*******************************************************************************/
void TIM_ITConfig(TIM_TypeDef *TIMx, u16 TIM_IT, FunctionalState TIM_Newstate)
{
if(TIM_Newstate == ENABLE)
{
TIMx->CR2 = (TIMx->CR2 & 0x00FF) | TIM_IT;
}
else
{
TIMx->CR2 &= ~TIM_IT;
}
}
/*******************************************************************************
* Function Name : TIM_DMAConfig
* Description : Configures the Timer DMA source.
* Input1 : TIMx: where x can be from 0 to 3 to select the TIM
* peripheral.
* Input2 : TIM_DMA_Souces: specifies the TIM DMA source to be selected.
* This parameter can be one of the following values:
* - TIM_DMA_IC1: Input Capture 1 DMA source.
* - TIM_DMA_OCA1 Output Compare 1 DMA source.
* - TIM_DMA_TO: Timer Overflow DMA source.
* - TIM_DMA_IC2: Input Capture 2 DMA source.
* - TIM_DMA_OC2: Output Compare 2 DMA source.
* Output : None
* Return : None
*******************************************************************************/
void TIM_DMAConfig(TIM_TypeDef *TIMx, u16 TIM_DMA_Sources)
{
/* Reset the DMAS[1:0] bits */
TIMx->CR1 &= TIM_DMA_CLEAR_MASK;
/* Set the DMAS[1:0] bits according to TIM_DMA_Sources parameter */
TIMx->CR1 |= TIM_DMA_Sources;
}
/*******************************************************************************
* Function Name : TIM_DMACmd
* Description : Enables or disables TIMx DMA peripheral.
* Input1 : TIMx: where x can be from 0 to 3 to select the TIM
* peripheral.
* Input2 : TIM_Newstate: new state of the TIMx DMA peripheral
* This parameter can be one of the following values:
* - ENABLE : Enable the TIMx DMA.
* - DISABLE: Disable the TIMx DMA.
* Output : None
* Return : None
*******************************************************************************/
void TIM_DMACmd(TIM_TypeDef *TIMx, FunctionalState TIM_Newstate)
{
if (TIM_Newstate == ENABLE)
{
TIMx->CR2 |= TIM_DMA_ENABLE;
}
else
{
TIMx->CR2 &= TIM_DMA_DISABLE;
}
}
/******************* (C) COPYRIGHT 2006 STMicroelectronics *****END OF FILE****/