Files
@ f778f20fe9ed
Branch filter:
Location: therm/usb_pwr.c
f778f20fe9ed
9.4 KiB
text/plain
Messing with SPI
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 | /**
******************************************************************************
* @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****/
|