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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [ARM7_STR75x_GCC/] [STLibrary/] [src/] [75x_tb.c] - Rev 584
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/******************** (C) COPYRIGHT 2006 STMicroelectronics ******************** * File Name : 75x_tb.c * Author : MCD Application Team * Date First Issued : 03/10/2006 * Description : This file provides all the TB software functions. ******************************************************************************** * History: * 07/17/2006 : V1.0 * 03/10/2006 : V0.1 ******************************************************************************** * 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 "75x_tb.h" #include "75x_mrcc.h" /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ /* Private macro -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ #define TB_IT_Enable_Mask 0x7FFF #define TB_IT_Clear_Mask 0x7FFF #define TB_IC_Enable 0x0004 #define TB_ICPolarity_Set 0x0008 #define TB_ICPolarity_Reset 0xFFF7 #define TB_UFS_Reset 0xFFFE #define TB_UFS_Set 0x0001 /* TB debug state */ #define TB_DBGC_Set 0x0400 #define TB_DBGC_Reset 0xFB7F /* TB counter state */ #define TB_COUNTER_Reset 0x0002 #define TB_COUNTER_Start 0x0004 #define TB_COUNTER_Stop 0xFFFB #define TB_SMS_EXTCLK_Set 0x0008 #define TB_SMS_RESETCLK_Set 0x0000 /* TB Slave Mode Enable Set/Reset value */ #define TB_SME_Reset 0x731B #define TB_SME_Set 0x0004 /* TB Trigger Selection value */ #define TB_TS_IC1_Set 0x0200 /* TB SCR Masks bit */ #define TB_SlaveModeSelection_Mask 0x7307 #define TB_TriggerSelection_Mask 0x701F /* Reset Register Masks */ #define TB_Prescaler_Reset_Mask 0x0000 #define TB_CounterMode_Mask 0xFF8F #define TB_AutoReload_Reset_Mask 0xFFFF /* Private function prototypes -----------------------------------------------*/ /* Private functions ---------------------------------------------------------*/ /****************************************************************************** * Function Name : TB_DeInit * Description : Deinitializes the TB peripheral registers to their default * reset values. * Input : None * Output : None * Return : None *******************************************************************************/ void TB_DeInit(void) { /* Enters and exits the TB peripheral to and from reset */ MRCC_PeripheralSWResetConfig(MRCC_Peripheral_TB,ENABLE); MRCC_PeripheralSWResetConfig(MRCC_Peripheral_TB,DISABLE); } /******************************************************************************* * Function Name : TB_Init * Description : Initializes TB peripheral according to the specified * parameters in the TB_InitStruct. * Input : TB_InitStruct: pointer to a TB_InitTypeDef structure that * contains the configuration information for the TB peripheral. * Output : None * Return : None *******************************************************************************/ void TB_Init(TB_InitTypeDef* TB_InitStruct) { /* Set the TB prescaler value */ TB->PSC = TB_InitStruct->TB_Prescaler; /* Set the TB period value */ TB->ARR = TB_InitStruct->TB_AutoReload; /* Set the corresponding counter mode */ TB->CR = (TB->CR & TB_CounterMode_Mask) | TB_InitStruct->TB_CounterMode; /* Set the corresponding clock source */ if(TB_InitStruct->TB_ClockSource == TB_ClockSource_CKRTC) { TB->SCR &= TB_SME_Reset & TB_SlaveModeSelection_Mask & TB_TriggerSelection_Mask; TB->SCR |= TB_SMS_EXTCLK_Set | TB_SME_Set | TB_TS_IC1_Set; } else { TB->SCR &= TB_SME_Reset & TB_SlaveModeSelection_Mask & TB_TriggerSelection_Mask; } if(TB_InitStruct->TB_Mode == TB_Mode_IC) { /* Set the corresponding value in TB SCR register */ TB->SCR &= TB_SME_Reset & TB_SlaveModeSelection_Mask & TB_TriggerSelection_Mask; TB->SCR |= TB_SMS_RESETCLK_Set | TB_SME_Set | TB_TS_IC1_Set; /* Set the IC1 enable bit */ TB->IMCR |= TB_IC_Enable; /* Set the input signal polarity */ if (TB_InitStruct->TB_ICAPolarity == TB_ICAPolarity_Falling) { TB->IMCR |= TB_ICPolarity_Set; } else { TB->IMCR &= TB_ICPolarity_Reset; } } } /******************************************************************************* * Function Name : TB_StructInit * Description : Fills each TB_InitStruct member with its default value * Input : TB_InitStruct : pointer to a TB_InitTypeDef structure which * will be initialized. * Output : None * Return : None *******************************************************************************/ void TB_StructInit(TB_InitTypeDef *TB_InitStruct) { TB_InitStruct->TB_Mode = TB_Mode_Timing; TB_InitStruct->TB_ClockSource = TB_ClockSource_CKTIM; TB_InitStruct->TB_CounterMode = TB_CounterMode_Up; TB_InitStruct->TB_ICAPolarity = TB_ICAPolarity_Rising; TB_InitStruct->TB_Prescaler = TB_Prescaler_Reset_Mask; TB_InitStruct->TB_AutoReload = TB_AutoReload_Reset_Mask; } /******************************************************************************* * Function Name : TB_Cmd * Description : Enables or disables the TB peripheral. * Input : Newstate: new state of the TB peripheral. This parameter can * be: ENABLE or DISABLE. * Output : None * Return : None *******************************************************************************/ void TB_Cmd(FunctionalState Newstate) { if(Newstate == ENABLE) { TB->CR |= TB_COUNTER_Start; } else { TB->CR &= TB_COUNTER_Stop; } } /******************************************************************************* * Function Name : TB_ITConfig * Description : Enables or disables the specified TB interrupt. * Input : - TB_IT: specifies the TB interrupt sources to be enabled or * disabled. * This parameter can be any combination of the following values: * - TB_IT_Update: TB Update interrupt * - TB_IT_GlobalUpdate: TB Global Update interrupt * - TB_IT_IC: TB Input Capture interrupt * - Newstate: new state of the specified TB interrupts. * This parameter can be: ENABLE or DISABLE. * Output : None * Return : None *******************************************************************************/ void TB_ITConfig(u16 TB_IT, FunctionalState Newstate) { u16 TB_IT_Enable = 0; TB_IT_Enable = TB_IT & TB_IT_Enable_Mask; if(Newstate == ENABLE) { /* Update interrupt global source: overflow/undeflow, counter reset operation or slave mode controller in reset mode */ if ((TB_IT & TB_IT_GlobalUpdate) == TB_IT_GlobalUpdate) { TB->CR &= TB_UFS_Reset; } /* Update interrupt source: counter overflow/underflow */ else if ((TB_IT & TB_IT_Update) == TB_IT_Update) { TB->CR |= TB_UFS_Set; } /* Select and enable the interrupts requests */ TB->RSR |= TB_IT_Enable; TB->RER |= TB_IT_Enable; } /* Disable the interrupts requests */ else { TB->RSR &= ~TB_IT_Enable; TB->RER &= ~TB_IT_Enable; } } /******************************************************************************* * Function Name : TB_SetPrescaler * Description : Sets the TB Prescaler value. * Input : Prescaler: specifies the TB Prescaler value. * Output : None * Return : None *******************************************************************************/ void TB_SetPrescaler(u16 Prescaler) { /* Sets the prescaler value */ TB->PSC = Prescaler; } /******************************************************************************* * Function Name : TB_ResetCounter * Description : Re-intializes the counter and generates an update of the * registers. * Input : None * Output : None * Return : None *******************************************************************************/ void TB_ResetCounter(void) { /* Re-intializes TB counter */ TB->CR |= TB_COUNTER_Reset; } /******************************************************************************* * Function Name : TB_DebugCmd * Description : Enables or disables TB peripheral Debug control. * Input : Newstate: new state of the TB Debug control. * This parameter can be: ENABLE or DISABLE. * Output : None * Return : None *******************************************************************************/ void TB_DebugCmd(FunctionalState Newstate) { if(Newstate == ENABLE) { TB->CR |= TB_DBGC_Set; } else { TB->CR &= TB_DBGC_Reset; } } /******************************************************************************* * Function Name : TB_CounterModeConfig * Description : Configures the TB Counter Mode. * Input : TB_CounterMode: specifies the TB counter mode to be used. * This parameter can be one of the following values: * - TB_CounterMode_Up: TB Up Counting Mode * - TB_CounterMode_Down: TB Down Counting Mode * - TB_CounterMode_CenterAligned: TB Center Aligned Mode * Output : None * Return : None *******************************************************************************/ void TB_CounterModeConfig(u16 TB_CounterMode) { /* Counter mode configuration */ TB->CR &= TB_CounterMode_Mask; TB->CR |= TB_CounterMode; } /******************************************************************************* * Function Name : TB_SLaveModeConfig * Description : Configures the TB slave Mode. * Input : TB_SMSMode: specifies the TB slave mode to be used. * This parameter can be one of the following values: * - TB_SMSMode_Trigger: The counter starts at a rising * edge of the trigger * - TB_SMSMode_Gated: The counter clock is enabled when * trigger signal is high * - TB_SMSMode_External: The rising edge of selected trigger * clocks the counter * - TB_SMSMode_Reset: The rising edge of the selected * trigger signal resets the counter * Output : None * Return : None *******************************************************************************/ void TB_SLaveModeConfig(u16 TB_SMSMode) { TB->SCR &= TB_SME_Reset & TB_SlaveModeSelection_Mask & TB_TriggerSelection_Mask; TB->SCR |= TB_SME_Set | TB_SMSMode | TB_TS_IC1_Set; } /******************************************************************************* * Function Name : TB_GetCounter * Description : Gets the TB Counter value. * Input : None * Output : None * Return : The TB counter register value. *******************************************************************************/ u16 TB_GetCounter(void) { return TB->CNT; } /******************************************************************************* * Function Name : TB_GetICAP1 * Description : Gets the TB Input capture value. * Input : None * Output : None * Return : The TB ICR1 register value. *******************************************************************************/ u16 TB_GetICAP1(void) { return TB->ICR1; } /******************************************************************************* * Function Name : TB_SetCounter * Description : Sets the TB Counter value. * Input : Counter: specifies the TB Counter value. * Output : None * Return : None *******************************************************************************/ void TB_SetCounter(u16 Counter) { TB->CNT = Counter; } /******************************************************************************* * Function Name : TB_GetFlagStatus * Description : Checks whether the specified TB flag is set or not. * Input : TB_FLAG: specifies the flag to check. * This parameter can be one of the following values: * - TB_FLAG_IC: TB Input Capture flag * - TB_FLAG_Update: TB update flag * Output : None * Return : The new state of the TB_FLAG (SET or RESET). *******************************************************************************/ FlagStatus TB_GetFlagStatus(u16 TB_FLAG) { if((TB->ISR & TB_FLAG) != RESET ) { return SET; } else { return RESET; } } /******************************************************************************* * Function Name : TB_ClearFlag * Description : Clears the TB’s pending flags. * Input : TB_FLAG: specifies the flag to clear. * This parameter can be any combination of the following values: * - TB_FLAG_IC: TB Input Capture flag * - TB_FLAG_Update: TB update flag * Output : None * Return : None *******************************************************************************/ void TB_ClearFlag(u16 TB_FLAG) { /* Clears the flags */ TB->ISR &= ~TB_FLAG; } /******************************************************************************* * Function Name : TB_GetITStatus * Description : Checks whether the specified TB interrupt has occurred or not. * Input : TB_IT: specifies the interrupt to check. * This parameter can be one of the following values: * - TB_IT_Update: TB Update interrupt * - TB_IT_GlobalUpdate: TB Global Update interrupt * - TB_IT_IC: TB Input Capture interrupt * Output : None * Return : The new state of the TB_IT (SET or RESET). *******************************************************************************/ ITStatus TB_GetITStatus(u16 TB_IT) { u16 TB_IT_Check = 0; /* Calculates the pending bits to be checked */ TB_IT_Check = TB_IT & TB_IT_Clear_Mask; if((TB->ISR & TB_IT_Check) != RESET ) { return SET; } else { return RESET; } } /******************************************************************************* * Function Name : TB_ClearITPendingBit * Description : Clears the TB's interrupt pending bits. * Input : TB_IT: specifies the interrupt pending bit to clear. * This parameter can be any combination of the following values: * - TB_IT_Update: TB Update interrupt * - TB_IT_GlobalUpdate: TB Global Update interrupt * - TB_IT_IC: TB Input Capture interrupt * Output : None * Return : None *******************************************************************************/ void TB_ClearITPendingBit(u16 TB_IT) { u16 TB_IT_Clear = 0; /* Calculates the pending bits to be cleared */ TB_IT_Clear = TB_IT & TB_IT_Clear_Mask; /* Clears the pending bits */ TB->ISR &= ~TB_IT_Clear; } /******************* (C) COPYRIGHT 2006 STMicroelectronics *****END OF FILE****/
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