Demo/ARM7_STR75x_IAR/STLibrary/src/75x_tb.c

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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****/