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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [ARM9_STR91X_IAR/] [Library/] [source/] [91x_scu.c] - Rev 581
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/******************** (C) COPYRIGHT 2006 STMicroelectronics ******************** * File Name : 91x_scu.c * Author : MCD Application Team * Date First Issued : 05/18/2006 : Version 1.0 * Description : This file provides the SCU library software functions ******************************************************************************** * History: * 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_scu.h" /* Include of other module interface headers ---------------------------------*/ /* Local includes ------------------------------------------------------------*/ /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ #define SCU_PLLEN 0x80000 /* Private macro -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ /* Private function prototypes -----------------------------------------------*/ /* Interface functions -------------------------------------------------------*/ /* Private functions ---------------------------------------------------------*/ /******************************************************************************* * Function Name : SCU_MCLKSourceConfig * Description : Configures the MCLK source clock * Input : MCLK_Source = SCU_MCLK_OSC, SCU_MCLK_PLL or SCU_MCLK_RTC * Output : None * Return : ErrorStatus: SUCCESS or ERROR * Note : this function returns ERROR if trying to select the PLL as * clock source while the PLL is disabled or not locked. *******************************************************************************/ ErrorStatus SCU_MCLKSourceConfig(u32 MCLK_Source) { u32 CLKCNTR_Value; CLKCNTR_Value = SCU->CLKCNTR; /*get CLKCNTR register value*/ CLKCNTR_Value &=~0x3; /*clear field MCLKSEL*/ if (MCLK_Source == SCU_MCLK_PLL) /*PLL selected as clock source*/ { /*check if PLL enabled & locked*/ if (!((SCU->PLLCONF&SCU_PLLEN)&&(SCU->SYSSTATUS&SCU_FLAG_LOCK))) return ERROR; } else CLKCNTR_Value |=MCLK_Source; /*OSC or RTC selected as clock source*/ SCU->CLKCNTR = CLKCNTR_Value; /*Update CLKCNTR register value*/ return SUCCESS; } /******************************************************************************* * Function Name : SCU_PLLFactorsConfig * Description : Sets the PLL factors * Input : PLLN, PLLM and PLLP * Output : None * Return : ErrorStatus: ERROR or SUCCESS * Notes : -The PLL factors must respect the PLL specification requirements * -The function returns ERROR if trying to change PLL * factors while PLL is selected as Main Clock source (MCLK) * -This function disables the PLL, to enable the PLL use * function" SCU_PLLCmd(ENABLE)" after setting the PLL factors ******************************************************************************/ ErrorStatus SCU_PLLFactorsConfig(u8 PLLN, u8 PLLM, u8 PLLP) { if (SCU_PLLCmd(DISABLE)==SUCCESS) /*Disable PLL*/ { SCU->PLLCONF =0; /*clear PLLCONF register*/ SCU->PLLCONF |=(PLLN<<8); /*update PLLN field*/ SCU->PLLCONF |=PLLM; /*update PLLM field*/ SCU->PLLCONF |=PLLP<<16; /*update PLLP field*/ return SUCCESS; } return ERROR; } /******************************************************************************* * Function Name : SCU_PLLCmd * Description : Enable or Disable the PLL * Input : NewState = ENABLE or DISABLE * Output : None * Return : ErrorStatus: SUCCESS or ERROR * Note : -The function returns ERROR if: * *trying to disable the PLL while it is selected as the MCLK * *trying to enable the PLL while it is already enabled and * locked *******************************************************************************/ ErrorStatus SCU_PLLCmd(FunctionalState NewState) { vu32 i; if (NewState==ENABLE) { if (!((SCU->PLLCONF&SCU_PLLEN)&&(SCU->SYSSTATUS&SCU_FLAG_LOCK))) { SCU->SYSSTATUS|=SCU_FLAG_LOCK; /*clear LOCK bit*/ SCU->PLLCONF |=SCU_PLLEN; /*PLL Enable*/ while(!SCU->SYSSTATUS&SCU_FLAG_LOCK); /*Wait PLL to lock*/ return SUCCESS; } else return ERROR; } else /*NewState = DISABLE*/ { if(SCU->CLKCNTR&0x3) /*check if PLL not sys CLK*/ { for(i=10;i>0;i--); /*delay before PLL disabling*/ SCU->PLLCONF &=~SCU_PLLEN; /*PLL Disable*/ return SUCCESS; } else return ERROR; } } /******************************************************************************* * Function Name : SCU_RCLKDivisorConfig * Description : Sets the RCLK divisor value * Input : RCLK_Divisor * Output : None * Return : None *******************************************************************************/ void SCU_RCLKDivisorConfig(u32 RCLK_Divisor) { SCU->CLKCNTR &=SCU_RCLK_Div1; /*clear RCLKDIV[2:0] field*/ if (RCLK_Divisor!=SCU_RCLK_Div1) SCU->CLKCNTR |= RCLK_Divisor; /*update field with RCLK divisor*/ } /******************************************************************************* * Function Name : SCU_HCLKDivisorConfig * Description : Sets the HCLK divisor value * Input : HCLK_Divisor * Output : None * Return : None *******************************************************************************/ void SCU_HCLKDivisorConfig(u32 HCLK_Divisor) { SCU->CLKCNTR &=SCU_HCLK_Div1; /*clear AHBDIV[1:0] field*/ if (HCLK_Divisor!=SCU_HCLK_Div1) SCU->CLKCNTR |= HCLK_Divisor; /*update field with HCLK divisor*/ } /******************************************************************************* * Function Name : SCU_PCLKDivisorConfig * Description : Sets the PCLK divisor value * Input : PCLK_Divisor * Output : None * Return : None *******************************************************************************/ void SCU_PCLKDivisorConfig(u32 PCLK_Divisor) { SCU->CLKCNTR &=SCU_PCLK_Div1; /*clear APBDIV[1:0] field*/ if (PCLK_Divisor!=SCU_PCLK_Div1) SCU->CLKCNTR |= PCLK_Divisor; /*update field with PCLK Divisor*/ } /******************************************************************************* * Function Name : SCU_APBPeriphClockConfig * Description : Enable the clock for an APB peripheral * Input : -APBPerip : APB peripherals(__RTC, __ADC ,...) * -NewState : ENABLE or DISABLE * Output : None * Return : None *******************************************************************************/ void SCU_APBPeriphClockConfig(u32 APBPeriph, FunctionalState NewState) { if (NewState==ENABLE) /*Enable clock for APB peripheral*/ SCU->PCGR1 |=APBPeriph; else SCU->PCGR1 &=~APBPeriph; /*Disable clock for APB peripheral*/ } /******************************************************************************* * Function Name : SCU_AHBPeriphClockConfig * Description : Enable the clock for an AHB peripheral * Input : -AHBPerip: AHB peripherals(__USB, __DMA,...) * -NewState : ENABLE or DISABLE * Output : None * Return : None *******************************************************************************/ void SCU_AHBPeriphClockConfig(u32 AHBPeriph, FunctionalState NewState) { if (NewState==ENABLE) /*Enable clock for AHB peripheral*/ SCU->PCGRO |=AHBPeriph; else SCU->PCGRO &=~AHBPeriph; /*Disable clock for AHB peripheral*/ } /******************************************************************************* * Function Name : SCU_APBPeriphReset * Description : Assert or deassert Reset on APB peripheral * Input : -APBPeriph: APB peripherals(__RTC, __ADC,...) -NewState : ENABLE or DISABLE * Output : None * Return : None *******************************************************************************/ void SCU_APBPeriphReset(u32 APBPeriph, FunctionalState NewState) { if (NewState==DISABLE) /*APB peripheral not held in Reset*/ SCU->PRR1 |=APBPeriph; else SCU->PRR1 &=~APBPeriph; /*APB peripheral held in Reset*/ } /******************************************************************************* * Function Name : SCU_AHBPeriphReset * Description : Assert or deassert Reset on AHB peripheral * Input : -AHBPeriph: AHB peripherals(__USB, __DMA,...) -NewState : ENABLE or DISABLE * Output : None * Return : None *******************************************************************************/ void SCU_AHBPeriphReset(u32 AHBPeriph, FunctionalState NewState) { if (NewState==DISABLE) SCU->PRR0 |=AHBPeriph; /*AHB peripheral not held in Reset*/ else SCU->PRR0 &=~AHBPeriph; /*AHB peripheral held in Reset*/ } /******************************************************************************* * Function Name : SCU_APBPeriphIdleConfig * Description : Enable or Disable Periph Clock during Idle mode * Input : -APBPeriph: APB peripherals(__RTC, __ADC,...) -NewState : ENABLE or DISABLE * Output : None * Return : None *******************************************************************************/ void SCU_APBPeriphIdleConfig(u32 APBPeriph, FunctionalState NewState) { if (NewState==ENABLE) SCU->MGR1 |=APBPeriph; /*APB peripheral clock enabled during Idle mode*/ else SCU->MGR1 &=~APBPeriph; /*APB peripheral clock disabled during Idle mode*/ } /******************************************************************************* * Function Name : SCU_AHBPeriphIdleConfig * Description : Enable or Disable Periph Clock during Idle mode * Input : -AHBPeriph: AHB peripherals(__USB, __DMA,...) -NewState : ENABLE or DISABLE * Output : None * Return : None *******************************************************************************/ void SCU_AHBPeriphIdleConfig(u32 AHBPeriph, FunctionalState NewState) { if (NewState==ENABLE) SCU->MGR0 |=AHBPeriph; /*AHB peripheral clock enabled during Idle mode*/ else SCU->MGR0 &=~AHBPeriph; /*AHB peripheral clock disabled during Idle mode*/ } /******************************************************************************* * Function Name : SCU_APBPeriphDebugConfig * Description : Enable or Disable Periph Clock during ARM debug state * Input : -APBPeriph: APB peripherals(__RTC, __ADC,...) -NewState : ENABLE or DISABLE * Output : None * Return : None *******************************************************************************/ void SCU_APBPeriphDebugConfig(u32 APBPeriph, FunctionalState NewState) { if (NewState==ENABLE) SCU->PECGR1 |=APBPeriph; /*APB peripheral clock enabled during ARM debug state*/ else SCU->PECGR1 &=~APBPeriph; /*APB peripheral clock disabled during ARM debug state*/ } /******************************************************************************* * Function Name : SCU_AHBPeriphDebugConfig * Description : Enable or Disable Periph Clock during ARM debug state * Input : -AHBPeriph: AHB peripherals(__USB, __DMA,...) -NewState : ENABLE or DISABLE * Output : None * Return : None *******************************************************************************/ void SCU_AHBPeriphDebugConfig(u32 AHBPeriph, FunctionalState NewState) { if (NewState==ENABLE) SCU->PECGR0 |=AHBPeriph; /*AHB peripheral clock enabled during ARM debug state*/ else SCU->PECGR0 &=~AHBPeriph; /*AHB peripheral clock disabled during ARM debug state*/ } /******************************************************************************* * Function Name : SCU_BRCLKDivisorConfig * Description : Sets the BRCLK divisor value * Input : BRCLK_Divisor * Output : None * Return : None *******************************************************************************/ void SCU_BRCLKDivisorConfig(u32 BRCLK_Divisor) { SCU->CLKCNTR &=SCU_BRCLK_Div1; /*Clear BRSEL bit*/ if (BRCLK_Divisor!=SCU_BRCLK_Div1) SCU->CLKCNTR |= SCU_BRCLK_Div2; /*set bit BRSEL*/ } /******************************************************************************* * Function Name : SCU_TIMCLKSourceConfig * Description : Sets the TIMx clock source * Input : - TIMx : SCU_TIM01 or SCU_TIM23 * - TIMCLK_Source = SCU_TIMCLK_EXT or SCU_TIMCLK_INT * Output : None * Return : None *******************************************************************************/ void SCU_TIMCLKSourceConfig(u8 TIMx, u32 TIMCLK_Source) { if (TIMx== SCU_TIM01) /*TIM01 clock source configuration*/ { SCU->CLKCNTR &=0xFFFFDFFF; if (TIMCLK_Source == SCU_TIMCLK_EXT) SCU->CLKCNTR |=0x2000; } else { SCU->CLKCNTR &=0xFFFFBFFF; /*TIM23 clock source configuration*/ if (TIMCLK_Source == SCU_TIMCLK_EXT) SCU->CLKCNTR |=0x4000; } } /******************************************************************************* * Function Name : SCU_TIMPresConfig * Description : Sets the TIMx Prescaler Value * Input : - TIMx : SCU_TIM01 or SCU_TIM23 * - Prescaler (16 bit value) * Output : None * Return : None *******************************************************************************/ void SCU_TIMPresConfig(u8 TIMx, u16 Prescaler) { if (TIMx==SCU_TIM01) /*TIM01 Prescaler configuration*/ SCU->SCR1 = Prescaler&0xFFFF; else SCU->SCR2 = Prescaler&0xFFFF; /*TIM23 Prescaler configuration*/ } /******************************************************************************* * Function Name : SCU_USBCLKConfig * Description : Configures the clock source for the 48MHz USBCLK * Input : USBCLK_Source: SCU_USBCLK_MCLK,SCU_USBCLK_MCLK2 or SCU_USBCLK_EXT * Output : None * Return : None *******************************************************************************/ void SCU_USBCLKConfig(u32 USBCLK_Source) { SCU->CLKCNTR &=SCU_USBCLK_MCLK; /*clear USBSEL[1:0] field*/ if (USBCLK_Source!=SCU_USBCLK_MCLK) SCU->CLKCNTR |= USBCLK_Source; /*update field with USBCLK_Source*/ } /******************************************************************************* * Function Name : SCU_PHYCLKConfig * Description : Enable or Disable PHY clock output * Input : NewState : ENABLE or DISABLE * Output : None * Return : None *******************************************************************************/ void SCU_PHYCLKConfig(FunctionalState NewState) { if (NewState==ENABLE) SCU->CLKCNTR |= 0x1000; /*enable MIIPHY clock*/ else SCU->CLKCNTR &=~0x1000; /*disable MIIPHY clock*/ } /******************************************************************************* * Function Name : SCU_FMICLKDivisorConfig * Description : Set the FMI clock divisor * Input : FMICLK_Divisor: SCU_FMICLK_Div1 or SCU_FMICLK_DIV2 * Output : None * Return : None *******************************************************************************/ void SCU_FMICLKDivisorConfig(u32 FMICLK_Divisor) { SCU->CLKCNTR &=SCU_FMICLK_Div1; /*FMICLK = RCLK*/ if (FMICLK_Divisor!=SCU_FMICLK_Div1) SCU->CLKCNTR |=SCU_FMICLK_Div2; /*FMICLK = RCLK/2 */ } /******************************************************************************* * Function Name : SCU_EMIBCLKDivisorConfig * Description : Set the EMI Bus clock divisor: EMIBCLK = HCLK or HCLK/2 * Input : SCU_EMICLK: SCU_EMIBCLK_Div1 , SCU_EMIBCLK_Div2 * Output : None * Return : None *******************************************************************************/ void SCU_EMIBCLKDivisorConfig(u32 SCU_EMIBCLK) { SCU->CLKCNTR &=SCU_EMIBCLK_Div1; /*EMIBCLK = HCLK */ if (SCU_EMIBCLK!=SCU_EMIBCLK_Div1) SCU->CLKCNTR |= SCU_EMIBCLK_Div2; /*EMIBCLK = HCLK/2 */ } /******************************************************************************* * Function Name : SCU_EMIModeConfig * Description : Configure the EMI as Multiplexed or Demultiplexed * Input : SCU_EMIMODE : SCU_EMI_MUX or SCU_EMI_DEMUX * Output : None * Return : None *******************************************************************************/ void SCU_EMIModeConfig(u32 SCU_EMIMODE) { SCU->SCR0 &=SCU_EMI_MUX; /*EMI mode = Multiplexed*/ if (SCU_EMIMODE!=SCU_EMI_MUX) SCU->SCR0 |= SCU_EMI_DEMUX; /*EMI mode = Demultiplexed*/ } /******************************************************************************* * Function Name : SCU_EMIALEConfig * Description : Configure the ALE signal (length & polarity) * Input : -SCU_EMIALE_LEN : SCU_EMIALE_LEN1 or SCU_EMIALE_LEN2 * -SCU_EMIALE_POL : SCU_EMIALE_POLLow or SCU_EMI_POLHigh * Output : None * Return : None *******************************************************************************/ void SCU_EMIALEConfig(u32 SCU_EMIALE_LEN, u32 SCU_EMIALE_POL) { /*Configure EMI ALE Length*/ SCU->SCR0 &=SCU_EMIALE_LEN1; if (SCU_EMIALE_LEN!=SCU_EMIALE_LEN1) SCU->SCR0 |= SCU_EMIALE_LEN2; /*Configure EMI ALE POL*/ SCU->SCR0 &=SCU_EMIALE_POLLow; if (SCU_EMIALE_POL!=SCU_EMIALE_POLLow) SCU->SCR0 |= SCU_EMIALE_POLHigh; } /******************************************************************************* * Function Name : SCU_ITConfig * Description : ENBALE or DISABLE an SCU interrupt * Input : -SCU_IT: interrupt mask * -NewState: ENABLE or DISABLE * Output : None * Return : None *******************************************************************************/ void SCU_ITConfig(u32 SCU_IT, FunctionalState NewState) { if (NewState==ENABLE) SCU->ITCMSK&=~SCU_IT; /*IT enable */ else SCU->ITCMSK|=SCU_IT; /*IT disable( mask)*/ } /******************************************************************************* * Function Name : SCU_GetFlagStatus * Description : Returns flag status * Input : SCU_Flag * Output : NONE * Return : SET or RESET *******************************************************************************/ FlagStatus SCU_GetFlagStatus(u32 SCU_Flag) { if (SCU->SYSSTATUS&SCU_Flag) return SET; else return RESET; } /******************************************************************************* * Function Name : SCU_ClearFlag * Description : Clears a SYSTATUS Flag * Input : SCU_Flag * Output : None * Return : None *******************************************************************************/ void SCU_ClearFlag(u32 SCU_Flag) { SCU->SYSSTATUS = SCU_Flag; } /******************************************************************************* * Function Name : SCU_GetPLLfreqValue * Description : Gets the current PLL frequency * Input : None * Output : None * Return : PLL frequency (KHz) *******************************************************************************/ u32 SCU_GetPLLFreqValue(void) { u8 PLL_M; u8 PLL_N; u8 PLL_P; PLL_M = SCU->PLLCONF&0xFF; PLL_N = (SCU->PLLCONF&0xFF00)>>8; PLL_P = (SCU->PLLCONF&0x70000)>>16; if ((PLL_M>0)&&(PLL_N>0)) return (u32)(((_Main_Crystal*2)*PLL_N)/(PLL_M<<PLL_P)); else return 0; } /******************************************************************************* * Function Name : SCU_GetMCLKFreqValue * Description : Gets the current MCLK frequency * Input : None * Output : None * Return : MCLK frequency (KHz) *******************************************************************************/ u32 SCU_GetMCLKFreqValue(void) { if ((SCU->CLKCNTR&0x3) == 0x2) return (u32)(_Main_Crystal); if ((SCU->CLKCNTR&0x3) == 0x1) return (u32)(32); else return (SCU_GetPLLFreqValue()); } /******************************************************************************* * Function Name : SCU_GetRCLKFreqValue * Description : Gets the current RCLK frequency * Input : None * Output : None * Return : RCLK frequency (KHz) *******************************************************************************/ u32 SCU_GetRCLKFreqValue(void) { u8 RCLK_Div; RCLK_Div = (SCU->CLKCNTR&0x1C)>>2; if (RCLK_Div==0x5) RCLK_Div=10; return (u32)(SCU_GetMCLKFreqValue() >>RCLK_Div); } /******************************************************************************* * Function Name : SCU_GetHCLKFreqValue * Description : Gets the current PCLK frequency * Input : None * Output : None * Return : HCLK frequency (KHz) *******************************************************************************/ u32 SCU_GetHCLKFreqValue(void) { u8 HCLK_Div; HCLK_Div = (SCU->CLKCNTR&0x60)>>5; return (u32)(SCU_GetRCLKFreqValue() >>HCLK_Div); } /******************************************************************************* * Function Name : SCU_GetPCLKFreqValue * Description : Gets the current HCLK frequency * Input : None * Output : None * Return : PCLK frequency (KHz) *******************************************************************************/ u32 SCU_GetPCLKFreqValue(void) { u8 PCLK_Div; PCLK_Div = (SCU->CLKCNTR&0x180)>>7; return (u32)(SCU_GetRCLKFreqValue() >>PCLK_Div); } /******************************************************************************* * Function Name : SCU_WakeUpLineConfig * Description : Configures an External interrupt as WakeUp line * Input : EXTint : 0 -> 31 * Output : None * Return : None *******************************************************************************/ void SCU_WakeUpLineConfig(u8 EXTint) { if (EXTint < 8) { SCU->WKUPSEL&=~0x7; SCU->WKUPSEL|=EXTint; } else if (EXTint<16) { SCU->WKUPSEL&=~0x38; SCU->WKUPSEL|=(EXTint-8)<<3; } else if (EXTint<24) { SCU->WKUPSEL&=~0x1C0; SCU->WKUPSEL|=(EXTint-16)<<6; } else { SCU->WKUPSEL&=~0xE00; SCU->WKUPSEL|=(EXTint-24)<<9; } } /******************************************************************************* * Function Name : SCU_SpecIntRunModeConfig * Description : Enables or Disables the Special Run mode * Input : newstate = ENABLE or DISABLE * Output : None * Return : None *******************************************************************************/ void SCU_SpecIntRunModeConfig(FunctionalState NewState) { if (NewState == ENABLE) SCU->PWRMNG |=0x8; else SCU->PWRMNG &=~0x8; } /******************************************************************************* * Function Name : SCU_EnterIdleMode * Description : Enters in Idle mode * Input : None * Output : None * Return : None *******************************************************************************/ void SCU_EnterIdleMode(void) { SCU->PWRMNG |=0x1; } /******************************************************************************* * Function Name : SCU_EnterSleepMode * Description : Enters in Sleep mode * Input : None * Output : None * Return : None *******************************************************************************/ void SCU_EnterSleepMode(void) { SCU->PWRMNG |=0x2; } /******************************************************************************* * Function Name : SCU_UARTIrDAConfig * Description : Enable or Disable the Irda mode for UARTx * Input : - UARTx :x=0,1 or 2 * - UART_IrDA_Mode : SCU_UARTMode_IrDA or SCU_UARTMode_UART * Output : None * Return : None *******************************************************************************/ void SCU_UARTIrDASelect(UART_TypeDef * UARTx, u8 UART_IrDA_Mode) { if (UART_IrDA_Mode == SCU_UARTMode_IrDA) { if (UARTx== UART0) SCU->SCR0 |=0x400; else if (UARTx==UART1) SCU->SCR0 |=0x800; else SCU->SCR0 |=0x1000; } else { if (UARTx== UART0) SCU->SCR0 &=~0x400; else if (UARTx==UART1) SCU->SCR0 &=~0x800; else SCU->SCR0 &=~0x1000; } } /******************************************************************************* * Function Name : SCU_PFQBCCmd * Description : Enable or Disable PFQBC * Input : NewState : ENABLE or DISABLE * Output : None * Return : None *******************************************************************************/ void SCU_PFQBCCmd(FunctionalState NewState) { if (NewState==ENABLE) SCU->SCR0 |=0x1; else SCU->SCR0 &=~0x1; } /******************* (C) COPYRIGHT 2006 STMicroelectronics *****END OF FILE****/
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