diff options
Diffstat (limited to 'thirdparty/STM32_USB-FS-Device_Lib_V4.0.0/Projects/Mass_Storage/src/usb_pwr.c')
| -rw-r--r-- | thirdparty/STM32_USB-FS-Device_Lib_V4.0.0/Projects/Mass_Storage/src/usb_pwr.c | 318 |
1 files changed, 318 insertions, 0 deletions
diff --git a/thirdparty/STM32_USB-FS-Device_Lib_V4.0.0/Projects/Mass_Storage/src/usb_pwr.c b/thirdparty/STM32_USB-FS-Device_Lib_V4.0.0/Projects/Mass_Storage/src/usb_pwr.c new file mode 100644 index 0000000..04673bd --- /dev/null +++ b/thirdparty/STM32_USB-FS-Device_Lib_V4.0.0/Projects/Mass_Storage/src/usb_pwr.c @@ -0,0 +1,318 @@ +/** + ****************************************************************************** + * @file usb_pwr.c + * @author MCD Application Team + * @version V4.0.0 + * @date 21-January-2013 + * @brief Connection/disconnection & power management + ****************************************************************************** + * @attention + * + * <h2><center>© COPYRIGHT 2013 STMicroelectronics</center></h2> + * + * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License"); + * You may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.st.com/software_license_agreement_liberty_v2 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + ****************************************************************************** + */ + + +/* Includes ------------------------------------------------------------------*/ +#include "usb_lib.h" +#include "usb_conf.h" +#include "usb_pwr.h" +#include "hw_config.h" + +/* Private typedef -----------------------------------------------------------*/ +/* Private define ------------------------------------------------------------*/ +/* Private macro -------------------------------------------------------------*/ +/* Private variables ---------------------------------------------------------*/ +__IO uint32_t bDeviceState = UNCONNECTED; /* USB device status */ +__IO bool fSuspendEnabled = TRUE; /* true when suspend is possible */ +__IO uint32_t EP[8]; + +struct +{ + __IO RESUME_STATE eState; + __IO uint8_t bESOFcnt; +} +ResumeS; + +__IO uint32_t remotewakeupon=0; + +/* Extern variables ----------------------------------------------------------*/ +/* Private function prototypes -----------------------------------------------*/ +/* Extern function prototypes ------------------------------------------------*/ +/* Private functions ---------------------------------------------------------*/ + +/******************************************************************************* +* Function Name : PowerOn +* Description : +* Input : None. +* Output : None. +* Return : USB_SUCCESS. +*******************************************************************************/ +RESULT PowerOn(void) +{ + uint16_t wRegVal; + + /*** cable plugged-in ? ***/ + USB_Cable_Config(ENABLE); + + /*** CNTR_PWDN = 0 ***/ + wRegVal = CNTR_FRES; + _SetCNTR(wRegVal); + + /*** CNTR_FRES = 0 ***/ + wInterrupt_Mask = 0; + _SetCNTR(wInterrupt_Mask); + /*** Clear pending interrupts ***/ + _SetISTR(0); + /*** Set interrupt mask ***/ + wInterrupt_Mask = CNTR_RESETM | CNTR_SUSPM | CNTR_WKUPM; + _SetCNTR(wInterrupt_Mask); + + return USB_SUCCESS; +} + +/******************************************************************************* +* Function Name : PowerOff +* Description : handles switch-off conditions +* Input : None. +* Output : None. +* Return : USB_SUCCESS. +*******************************************************************************/ +RESULT PowerOff() +{ + /* disable all interrupts and force USB reset */ + _SetCNTR(CNTR_FRES); + /* clear interrupt status register */ + _SetISTR(0); + /* Disable the Pull-Up*/ + USB_Cable_Config(DISABLE); + /* switch-off device */ + _SetCNTR(CNTR_FRES + CNTR_PDWN); + /* sw variables reset */ + /* ... */ + + return USB_SUCCESS; +} + +/******************************************************************************* +* Function Name : Suspend +* Description : sets suspend mode operating conditions +* Input : None. +* Output : None. +* Return : USB_SUCCESS. +*******************************************************************************/ +void Suspend(void) +{ + uint32_t i =0; + uint16_t wCNTR; + uint32_t tmpreg = 0; + __IO uint32_t savePWR_CR=0; + /* suspend preparation */ + /* ... */ + + /*Store CNTR value */ + wCNTR = _GetCNTR(); + + /* This a sequence to apply a force RESET to handle a robustness case */ + + /*Store endpoints registers status */ + for (i=0;i<8;i++) EP[i] = _GetENDPOINT(i); + + /* unmask RESET flag */ + wCNTR|=CNTR_RESETM; + _SetCNTR(wCNTR); + + /*apply FRES */ + wCNTR|=CNTR_FRES; + _SetCNTR(wCNTR); + + /*clear FRES*/ + wCNTR&=~CNTR_FRES; + _SetCNTR(wCNTR); + + /*poll for RESET flag in ISTR*/ + while((_GetISTR()&ISTR_RESET) == 0); + + /* clear RESET flag in ISTR */ + _SetISTR((uint16_t)CLR_RESET); + + /*restore Enpoints*/ + for (i=0;i<8;i++) + _SetENDPOINT(i, EP[i]); + + /* Now it is safe to enter macrocell in suspend mode */ + wCNTR |= CNTR_FSUSP; + _SetCNTR(wCNTR); + + /* force low-power mode in the macrocell */ + wCNTR = _GetCNTR(); + wCNTR |= CNTR_LPMODE; + _SetCNTR(wCNTR); + + /*prepare entry in low power mode (STOP mode)*/ + /* Select the regulator state in STOP mode*/ + savePWR_CR = PWR->CR; + tmpreg = PWR->CR; + /* Clear PDDS and LPDS bits */ + tmpreg &= ((uint32_t)0xFFFFFFFC); + /* Set LPDS bit according to PWR_Regulator value */ + tmpreg |= PWR_Regulator_LowPower; + /* Store the new value */ + PWR->CR = tmpreg; + /* Set SLEEPDEEP bit of Cortex System Control Register */ +#if defined (STM32F30X) || defined (STM32F37X) + SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk; +#else + SCB->SCR |= SCB_SCR_SLEEPDEEP; +#endif + + /* enter system in STOP mode, only when wakeup flag in not set */ + if((_GetISTR()&ISTR_WKUP)==0) + { + __WFI(); + /* Reset SLEEPDEEP bit of Cortex System Control Register */ +#if defined (STM32F30X) || defined (STM32F37X) + SCB->SCR &= (uint32_t)~((uint32_t)SCB_SCR_SLEEPDEEP_Msk); +#else + SCB->SCR &= (uint32_t)~((uint32_t)SCB_SCR_SLEEPDEEP); +#endif + } + else + { + /* Clear Wakeup flag */ + _SetISTR(CLR_WKUP); + /* clear FSUSP to abort entry in suspend mode */ + wCNTR = _GetCNTR(); + wCNTR&=~CNTR_FSUSP; + _SetCNTR(wCNTR); + + /*restore sleep mode configuration */ + /* restore Power regulator config in sleep mode*/ + PWR->CR = savePWR_CR; + + /* Reset SLEEPDEEP bit of Cortex System Control Register */ +#if defined (STM32F30X) || defined (STM32F37X) + SCB->SCR &= (uint32_t)~((uint32_t)SCB_SCR_SLEEPDEEP_Msk); +#else + SCB->SCR &= (uint32_t)~((uint32_t)SCB_SCR_SLEEPDEEP); +#endif + } +} + +/******************************************************************************* +* Function Name : Resume_Init +* Description : Handles wake-up restoring normal operations +* Input : None. +* Output : None. +* Return : USB_SUCCESS. +*******************************************************************************/ +void Resume_Init(void) +{ + uint16_t wCNTR; + + /* ------------------ ONLY WITH BUS-POWERED DEVICES ---------------------- */ + /* restart the clocks */ + /* ... */ + + /* CNTR_LPMODE = 0 */ + wCNTR = _GetCNTR(); + wCNTR &= (~CNTR_LPMODE); + _SetCNTR(wCNTR); + + /* restore full power */ + /* ... on connected devices */ + Leave_LowPowerMode(); + + /* reset FSUSP bit */ + _SetCNTR(IMR_MSK); + + /* reverse suspend preparation */ + /* ... */ + +} + +/******************************************************************************* +* Function Name : Resume +* Description : This is the state machine handling resume operations and +* timing sequence. The control is based on the Resume structure +* variables and on the ESOF interrupt calling this subroutine +* without changing machine state. +* Input : a state machine value (RESUME_STATE) +* RESUME_ESOF doesn't change ResumeS.eState allowing +* decrementing of the ESOF counter in different states. +* Output : None. +* Return : None. +*******************************************************************************/ +void Resume(RESUME_STATE eResumeSetVal) +{ + uint16_t wCNTR; + + if (eResumeSetVal != RESUME_ESOF) + ResumeS.eState = eResumeSetVal; + switch (ResumeS.eState) + { + case RESUME_EXTERNAL: + if (remotewakeupon ==0) + { + Resume_Init(); + ResumeS.eState = RESUME_OFF; + } + else /* RESUME detected during the RemoteWAkeup signalling => keep RemoteWakeup handling*/ + { + ResumeS.eState = RESUME_ON; + } + break; + case RESUME_INTERNAL: + Resume_Init(); + ResumeS.eState = RESUME_START; + remotewakeupon = 1; + break; + case RESUME_LATER: + ResumeS.bESOFcnt = 2; + ResumeS.eState = RESUME_WAIT; + break; + case RESUME_WAIT: + ResumeS.bESOFcnt--; + if (ResumeS.bESOFcnt == 0) + ResumeS.eState = RESUME_START; + break; + case RESUME_START: + wCNTR = _GetCNTR(); + wCNTR |= CNTR_RESUME; + _SetCNTR(wCNTR); + ResumeS.eState = RESUME_ON; + ResumeS.bESOFcnt = 10; + break; + case RESUME_ON: + ResumeS.bESOFcnt--; + if (ResumeS.bESOFcnt == 0) + { + wCNTR = _GetCNTR(); + wCNTR &= (~CNTR_RESUME); + _SetCNTR(wCNTR); + ResumeS.eState = RESUME_OFF; + remotewakeupon = 0; + } + break; + case RESUME_OFF: + case RESUME_ESOF: + default: + ResumeS.eState = RESUME_OFF; + break; + } +} + +/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |