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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [ARM9_STR91X_IAR/] [Library/] [source/] [91x_scu.c] - Blame information for rev 583

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1 577 jeremybenn 
/******************** (C) COPYRIGHT 2006 STMicroelectronics ********************
2 
* File Name          : 91x_scu.c
3 
* Author             : MCD Application Team
4 
* Date First Issued  : 05/18/2006 : Version 1.0
5 
* Description        : This file provides the SCU library software functions
6 
********************************************************************************
7 
* History:
8 
* 05/24/2006 : Version 1.1
9 
* 05/18/2006 : Version 1.0
10 
********************************************************************************
11 
* THE PRESENT SOFTWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS WITH
12 
* CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME. AS
13 
* A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT, INDIRECT
14 
* OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE CONTENT
15 
* OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING INFORMATION
16 
* CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
17 
*******************************************************************************/
18 
 
19 
/* Includes ------------------------------------------------------------------*/
20 
#include "91x_scu.h"
21 
 
22 
/* Include of other module interface headers ---------------------------------*/
23 
/* Local includes ------------------------------------------------------------*/
24 
/* Private typedef -----------------------------------------------------------*/
25 
/* Private define ------------------------------------------------------------*/
26 
#define SCU_PLLEN 0x80000
27 
/* Private macro -------------------------------------------------------------*/
28 
/* Private variables ---------------------------------------------------------*/
29 
/* Private function prototypes -----------------------------------------------*/
30 
/* Interface functions -------------------------------------------------------*/
31 
/* Private functions ---------------------------------------------------------*/
32 
 
33 
/*******************************************************************************
34 
* Function Name  : SCU_MCLKSourceConfig
35 
* Description    : Configures the MCLK source clock
36 
* Input          : MCLK_Source = SCU_MCLK_OSC, SCU_MCLK_PLL or SCU_MCLK_RTC
37 
* Output         : None
38 
* Return         : ErrorStatus: SUCCESS or ERROR
39 
* Note           : this function returns ERROR if trying to select the PLL as
40 
*                  clock source while the PLL is disabled or not locked.
41 
*******************************************************************************/
42 
ErrorStatus SCU_MCLKSourceConfig(u32 MCLK_Source)
43 
{
44 
  u32 CLKCNTR_Value;
45 
 
46 
  CLKCNTR_Value = SCU->CLKCNTR;         /*get CLKCNTR register value*/
47 
  CLKCNTR_Value &=~0x3;                 /*clear field MCLKSEL*/
48 
  if (MCLK_Source == SCU_MCLK_PLL)      /*PLL selected as clock source*/
49 
  {
50 
    /*check if PLL enabled & locked*/
51 
    if (!((SCU->PLLCONF&SCU_PLLEN)&&(SCU->SYSSTATUS&SCU_FLAG_LOCK)))
52 
    return ERROR;
53 
  }
54 
  else CLKCNTR_Value |=MCLK_Source;     /*OSC or RTC selected as clock source*/
55 
  SCU->CLKCNTR = CLKCNTR_Value;         /*Update CLKCNTR register value*/
56 
  return SUCCESS;
57 
}
58 
 
59 
/*******************************************************************************
60 
* Function Name  : SCU_PLLFactorsConfig
61 
* Description    : Sets the PLL factors
62 
* Input          : PLLN, PLLM and PLLP
63 
* Output         : None
64 
* Return         : ErrorStatus: ERROR or SUCCESS
65 
* Notes          : -The PLL factors must respect the PLL specification requirements
66 
*                  -The function returns ERROR if trying to change PLL
67 
*                   factors while PLL is selected as Main Clock source (MCLK)
68 
*                  -This function disables the PLL, to enable the PLL use
69 
*                   function" SCU_PLLCmd(ENABLE)" after setting the PLL factors
70 
******************************************************************************/
71 
ErrorStatus SCU_PLLFactorsConfig(u8 PLLN, u8 PLLM, u8 PLLP)
72 
{
73 
  if (SCU_PLLCmd(DISABLE)==SUCCESS)      /*Disable PLL*/
74 
  {
75 
    SCU->PLLCONF =0;                     /*clear PLLCONF register*/
76 
    SCU->PLLCONF |=(PLLN<<8);            /*update PLLN field*/
77 
    SCU->PLLCONF |=PLLM;                 /*update PLLM field*/
78 
    SCU->PLLCONF |=PLLP<<16;             /*update PLLP field*/
79 
    return SUCCESS;
80 
  }
81 
  return ERROR;
82 
}
83 
 
84 
/*******************************************************************************
85 
* Function Name  : SCU_PLLCmd
86 
* Description    : Enable or Disable the PLL
87 
* Input          : NewState = ENABLE or DISABLE
88 
* Output         : None
89 
* Return         : ErrorStatus: SUCCESS or ERROR
90 
* Note           : -The function returns ERROR if:
91 
*                   *trying to disable the PLL while it is selected as the MCLK
92 
*                   *trying to enable the PLL while it is already enabled and
93 
*                    locked
94 
*******************************************************************************/
95 
ErrorStatus SCU_PLLCmd(FunctionalState NewState)
96 
{
97 
  vu32 i;
98 
  if (NewState==ENABLE)
99 
  {
100 
    if (!((SCU->PLLCONF&SCU_PLLEN)&&(SCU->SYSSTATUS&SCU_FLAG_LOCK)))
101 
    {
102 
      SCU->SYSSTATUS|=SCU_FLAG_LOCK;               /*clear LOCK bit*/
103 
      SCU->PLLCONF |=SCU_PLLEN;                    /*PLL Enable*/
104 
      while(!SCU->SYSSTATUS&SCU_FLAG_LOCK);        /*Wait PLL to lock*/
105 
      return SUCCESS;
106 
    }
107 
    else return ERROR;
108 
  }
109 
  else /*NewState = DISABLE*/
110 
  {
111 
    if(SCU->CLKCNTR&0x3)                /*check if PLL not sys CLK*/
112 
    {
113 
      for(i=10;i>0;i--);                /*delay before PLL disabling*/
114 
      SCU->PLLCONF &=~SCU_PLLEN;        /*PLL Disable*/
115 
      return SUCCESS;
116 
    }
117 
    else return ERROR;
118 
  }
119 
}
120 
 
121 
/*******************************************************************************
122 
* Function Name  : SCU_RCLKDivisorConfig
123 
* Description    : Sets the RCLK divisor value
124 
* Input          : RCLK_Divisor
125 
* Output         : None
126 
* Return         : None
127 
*******************************************************************************/
128 
void SCU_RCLKDivisorConfig(u32 RCLK_Divisor)
129 
{
130 
  SCU->CLKCNTR &=SCU_RCLK_Div1;              /*clear RCLKDIV[2:0] field*/
131 
  if (RCLK_Divisor!=SCU_RCLK_Div1)
132 
  SCU->CLKCNTR |= RCLK_Divisor;              /*update field with RCLK divisor*/
133 
}
134 
 
135 
/*******************************************************************************
136 
* Function Name  : SCU_HCLKDivisorConfig
137 
* Description    : Sets the HCLK divisor value
138 
* Input          : HCLK_Divisor
139 
* Output         : None
140 
* Return         : None
141 
*******************************************************************************/
142 
void SCU_HCLKDivisorConfig(u32 HCLK_Divisor)
143 
{
144 
  SCU->CLKCNTR &=SCU_HCLK_Div1;              /*clear AHBDIV[1:0] field*/
145 
  if (HCLK_Divisor!=SCU_HCLK_Div1)
146 
  SCU->CLKCNTR |= HCLK_Divisor;              /*update field with HCLK divisor*/
147 
}
148 
 
149 
/*******************************************************************************
150 
* Function Name  : SCU_PCLKDivisorConfig
151 
* Description    : Sets the PCLK divisor value
152 
* Input          : PCLK_Divisor
153 
* Output         : None
154 
* Return         : None
155 
*******************************************************************************/
156 
void SCU_PCLKDivisorConfig(u32 PCLK_Divisor)
157 
{
158 
  SCU->CLKCNTR &=SCU_PCLK_Div1;              /*clear APBDIV[1:0] field*/
159 
  if (PCLK_Divisor!=SCU_PCLK_Div1)
160 
  SCU->CLKCNTR |= PCLK_Divisor;              /*update field with PCLK Divisor*/
161 
}
162 
 
163 
/*******************************************************************************
164 
* Function Name  : SCU_APBPeriphClockConfig
165 
* Description    : Enable the clock for an APB peripheral
166 
* Input          : -APBPerip : APB peripherals(__RTC, __ADC ,...)
167 
*                  -NewState : ENABLE or DISABLE
168 
* Output         : None
169 
* Return         : None
170 
*******************************************************************************/
171 
void SCU_APBPeriphClockConfig(u32 APBPeriph, FunctionalState NewState)
172 
{
173 
  if (NewState==ENABLE)                     /*Enable clock for APB peripheral*/
174 
  SCU->PCGR1 |=APBPeriph;
175 
  else
176 
  SCU->PCGR1 &=~APBPeriph;                  /*Disable clock for APB peripheral*/
177 
}
178 
 
179 
/*******************************************************************************
180 
* Function Name  : SCU_AHBPeriphClockConfig
181 
* Description    : Enable the clock for an AHB peripheral
182 
* Input          : -AHBPerip: AHB peripherals(__USB, __DMA,...)
183 
*                  -NewState : ENABLE or DISABLE
184 
* Output         : None
185 
* Return         : None
186 
*******************************************************************************/
187 
void SCU_AHBPeriphClockConfig(u32 AHBPeriph, FunctionalState NewState)
188 
{
189 
  if (NewState==ENABLE)                     /*Enable clock for AHB peripheral*/
190 
  SCU->PCGRO |=AHBPeriph;
191 
  else
192 
  SCU->PCGRO &=~AHBPeriph;                  /*Disable clock for AHB peripheral*/
193 
}
194 
 
195 
/*******************************************************************************
196 
* Function Name  : SCU_APBPeriphReset
197 
* Description    : Assert or deassert Reset on APB peripheral
198 
* Input          : -APBPeriph: APB peripherals(__RTC, __ADC,...)
199 
                   -NewState : ENABLE or DISABLE
200 
* Output         : None
201 
* Return         : None
202 
*******************************************************************************/
203 
void SCU_APBPeriphReset(u32 APBPeriph, FunctionalState NewState)
204 
{
205 
  if (NewState==DISABLE)                    /*APB peripheral not held in Reset*/
206 
  SCU->PRR1 |=APBPeriph;
207 
  else
208 
  SCU->PRR1 &=~APBPeriph;                   /*APB peripheral held in Reset*/
209 
}
210 
 
211 
/*******************************************************************************
212 
* Function Name  : SCU_AHBPeriphReset
213 
* Description    : Assert or deassert Reset on AHB peripheral
214 
* Input          : -AHBPeriph: AHB peripherals(__USB, __DMA,...)
215 
                   -NewState : ENABLE or DISABLE
216 
* Output         : None
217 
* Return         : None
218 
*******************************************************************************/
219 
void SCU_AHBPeriphReset(u32 AHBPeriph, FunctionalState NewState)
220 
{
221 
  if (NewState==DISABLE)
222 
  SCU->PRR0 |=AHBPeriph;                    /*AHB peripheral not held in Reset*/
223 
  else
224 
  SCU->PRR0 &=~AHBPeriph;                   /*AHB peripheral held in Reset*/
225 
}
226 
 
227 
/*******************************************************************************
228 
* Function Name  : SCU_APBPeriphIdleConfig
229 
* Description    : Enable or Disable Periph Clock during Idle mode
230 
* Input          : -APBPeriph: APB peripherals(__RTC, __ADC,...)
231 
                   -NewState : ENABLE or DISABLE
232 
* Output         : None
233 
* Return         : None
234 
*******************************************************************************/
235 
void SCU_APBPeriphIdleConfig(u32 APBPeriph, FunctionalState NewState)
236 
{
237 
  if (NewState==ENABLE)
238 
  SCU->MGR1 |=APBPeriph;      /*APB peripheral clock enabled during Idle mode*/
239 
  else
240 
  SCU->MGR1 &=~APBPeriph;     /*APB peripheral clock disabled during Idle mode*/
241 
}
242 
 
243 
/*******************************************************************************
244 
* Function Name  : SCU_AHBPeriphIdleConfig
245 
* Description    : Enable or Disable Periph Clock during Idle mode
246 
* Input          : -AHBPeriph: AHB peripherals(__USB, __DMA,...)
247 
                   -NewState : ENABLE or DISABLE
248 
* Output         : None
249 
* Return         : None
250 
*******************************************************************************/
251 
void SCU_AHBPeriphIdleConfig(u32 AHBPeriph, FunctionalState NewState)
252 
{
253 
  if (NewState==ENABLE)
254 
  SCU->MGR0 |=AHBPeriph;      /*AHB peripheral clock enabled during Idle mode*/
255 
  else
256 
  SCU->MGR0 &=~AHBPeriph;     /*AHB peripheral clock disabled during Idle mode*/
257 
}
258 
 
259 
/*******************************************************************************
260 
* Function Name  : SCU_APBPeriphDebugConfig
261 
* Description    : Enable or Disable Periph Clock during ARM debug state
262 
* Input          : -APBPeriph: APB peripherals(__RTC, __ADC,...)
263 
                   -NewState : ENABLE or DISABLE
264 
* Output         : None
265 
* Return         : None
266 
*******************************************************************************/
267 
void SCU_APBPeriphDebugConfig(u32 APBPeriph, FunctionalState NewState)
268 
{
269 
  if (NewState==ENABLE)
270 
  SCU->PECGR1 |=APBPeriph;    /*APB peripheral clock enabled during ARM debug state*/
271 
  else
272 
  SCU->PECGR1 &=~APBPeriph;   /*APB peripheral clock disabled during ARM debug state*/
273 
}
274 
 
275 
/*******************************************************************************
276 
* Function Name  : SCU_AHBPeriphDebugConfig
277 
* Description    : Enable or Disable Periph Clock during ARM debug state
278 
* Input          : -AHBPeriph: AHB peripherals(__USB, __DMA,...)
279 
                   -NewState : ENABLE or DISABLE
280 
* Output         : None
281 
* Return         : None
282 
*******************************************************************************/
283 
void SCU_AHBPeriphDebugConfig(u32 AHBPeriph, FunctionalState NewState)
284 
{
285 
  if (NewState==ENABLE)
286 
  SCU->PECGR0 |=AHBPeriph;    /*AHB peripheral clock enabled during ARM debug state*/
287 
  else
288 
  SCU->PECGR0 &=~AHBPeriph;   /*AHB peripheral clock disabled during ARM debug state*/
289 
}
290 
/*******************************************************************************
291 
* Function Name  : SCU_BRCLKDivisorConfig
292 
* Description    : Sets the BRCLK divisor value
293 
* Input          : BRCLK_Divisor
294 
* Output         : None
295 
* Return         : None
296 
*******************************************************************************/
297 
void SCU_BRCLKDivisorConfig(u32 BRCLK_Divisor)
298 
{
299 
  SCU->CLKCNTR &=SCU_BRCLK_Div1;              /*Clear BRSEL bit*/
300 
  if (BRCLK_Divisor!=SCU_BRCLK_Div1)
301 
  SCU->CLKCNTR |= SCU_BRCLK_Div2;             /*set bit BRSEL*/
302 
}
303 
 
304 
/*******************************************************************************
305 
* Function Name  : SCU_TIMCLKSourceConfig
306 
* Description    : Sets the TIMx clock source
307 
* Input          : - TIMx : SCU_TIM01 or SCU_TIM23
308 
*                  - TIMCLK_Source = SCU_TIMCLK_EXT or SCU_TIMCLK_INT
309 
* Output         : None
310 
* Return         : None
311 
*******************************************************************************/
312 
void SCU_TIMCLKSourceConfig(u8 TIMx, u32 TIMCLK_Source)
313 
{
314 
  if (TIMx== SCU_TIM01)                     /*TIM01 clock source configuration*/
315 
  {
316 
    SCU->CLKCNTR &=0xFFFFDFFF;
317 
    if (TIMCLK_Source == SCU_TIMCLK_EXT)
318 
    SCU->CLKCNTR |=0x2000;
319 
  }
320 
  else
321 
  {
322 
    SCU->CLKCNTR &=0xFFFFBFFF;            /*TIM23 clock source configuration*/
323 
    if (TIMCLK_Source == SCU_TIMCLK_EXT)
324 
    SCU->CLKCNTR |=0x4000;
325 
  }
326 
}
327 
 
328 
/*******************************************************************************
329 
* Function Name  : SCU_TIMPresConfig
330 
* Description    : Sets the TIMx Prescaler Value
331 
* Input          : - TIMx : SCU_TIM01 or SCU_TIM23
332 
*                  - Prescaler (16 bit value)
333 
* Output         : None
334 
* Return         : None
335 
*******************************************************************************/
336 
void SCU_TIMPresConfig(u8 TIMx, u16 Prescaler)
337 
{
338 
  if (TIMx==SCU_TIM01)                     /*TIM01 Prescaler configuration*/
339 
  SCU->SCR1 = Prescaler&0xFFFF;
340 
  else
341 
  SCU->SCR2 = Prescaler&0xFFFF;            /*TIM23 Prescaler configuration*/
342 
}
343 
 
344 
/*******************************************************************************
345 
* Function Name  : SCU_USBCLKConfig
346 
* Description    : Configures the clock source for the 48MHz USBCLK
347 
* Input          : USBCLK_Source: SCU_USBCLK_MCLK,SCU_USBCLK_MCLK2 or SCU_USBCLK_EXT
348 
* Output         : None
349 
* Return         : None
350 
*******************************************************************************/
351 
void SCU_USBCLKConfig(u32 USBCLK_Source)
352 
{
353 
  SCU->CLKCNTR &=SCU_USBCLK_MCLK;            /*clear USBSEL[1:0] field*/
354 
  if (USBCLK_Source!=SCU_USBCLK_MCLK)
355 
  SCU->CLKCNTR |= USBCLK_Source;             /*update field with USBCLK_Source*/
356 
}
357 
 
358 
/*******************************************************************************
359 
* Function Name  : SCU_PHYCLKConfig
360 
* Description    : Enable or Disable PHY clock output
361 
* Input          : NewState : ENABLE or DISABLE
362 
* Output         : None
363 
* Return         : None
364 
*******************************************************************************/
365 
void SCU_PHYCLKConfig(FunctionalState NewState)
366 
{
367 
  if (NewState==ENABLE)
368 
  SCU->CLKCNTR |= 0x1000;                    /*enable MIIPHY clock*/
369 
  else
370 
  SCU->CLKCNTR &=~0x1000;                    /*disable MIIPHY clock*/
371 
}
372 
 
373 
/*******************************************************************************
374 
* Function Name  : SCU_FMICLKDivisorConfig
375 
* Description    : Set the FMI clock divisor
376 
* Input          : FMICLK_Divisor: SCU_FMICLK_Div1 or SCU_FMICLK_DIV2
377 
* Output         : None
378 
* Return         : None
379 
*******************************************************************************/
380 
void SCU_FMICLKDivisorConfig(u32 FMICLK_Divisor)
381 
{
382 
  SCU->CLKCNTR &=SCU_FMICLK_Div1;            /*FMICLK = RCLK*/
383 
  if (FMICLK_Divisor!=SCU_FMICLK_Div1)
384 
  SCU->CLKCNTR |=SCU_FMICLK_Div2;            /*FMICLK = RCLK/2 */
385 
}
386 
 
387 
/*******************************************************************************
388 
* Function Name  : SCU_EMIBCLKDivisorConfig
389 
* Description    : Set the EMI Bus clock divisor: EMIBCLK = HCLK or HCLK/2
390 
* Input          : SCU_EMICLK: SCU_EMIBCLK_Div1 , SCU_EMIBCLK_Div2
391 
* Output         : None
392 
* Return         : None
393 
*******************************************************************************/
394 
void SCU_EMIBCLKDivisorConfig(u32 SCU_EMIBCLK)
395 
{
396 
  SCU->CLKCNTR &=SCU_EMIBCLK_Div1;          /*EMIBCLK = HCLK */
397 
  if (SCU_EMIBCLK!=SCU_EMIBCLK_Div1)
398 
  SCU->CLKCNTR |= SCU_EMIBCLK_Div2;         /*EMIBCLK = HCLK/2 */
399 
}
400 
 
401 
/*******************************************************************************
402 
* Function Name  : SCU_EMIModeConfig
403 
* Description    : Configure the EMI as Multiplexed or Demultiplexed
404 
* Input          : SCU_EMIMODE : SCU_EMI_MUX or SCU_EMI_DEMUX
405 
* Output         : None
406 
* Return         : None
407 
*******************************************************************************/
408 
void SCU_EMIModeConfig(u32 SCU_EMIMODE)
409 
{
410 
  SCU->SCR0 &=SCU_EMI_MUX;                 /*EMI mode = Multiplexed*/
411 
  if (SCU_EMIMODE!=SCU_EMI_MUX)
412 
  SCU->SCR0 |= SCU_EMI_DEMUX;                /*EMI mode = Demultiplexed*/
413 
}
414 
 
415 
/*******************************************************************************
416 
* Function Name  : SCU_EMIALEConfig
417 
* Description    : Configure the ALE signal (length & polarity)
418 
* Input          : -SCU_EMIALE_LEN : SCU_EMIALE_LEN1 or SCU_EMIALE_LEN2
419 
*                  -SCU_EMIALE_POL : SCU_EMIALE_POLLow or SCU_EMI_POLHigh
420 
* Output         : None
421 
* Return         : None
422 
*******************************************************************************/
423 
void SCU_EMIALEConfig(u32 SCU_EMIALE_LEN, u32 SCU_EMIALE_POL)
424 
{
425 
  /*Configure EMI ALE Length*/
426 
  SCU->SCR0 &=SCU_EMIALE_LEN1;
427 
  if (SCU_EMIALE_LEN!=SCU_EMIALE_LEN1)
428 
  SCU->SCR0 |= SCU_EMIALE_LEN2;
429 
 
430 
  /*Configure EMI ALE POL*/
431 
  SCU->SCR0 &=SCU_EMIALE_POLLow;
432 
  if (SCU_EMIALE_POL!=SCU_EMIALE_POLLow)
433 
  SCU->SCR0 |= SCU_EMIALE_POLHigh;
434 
}
435 
 
436 
/*******************************************************************************
437 
* Function Name  : SCU_ITConfig
438 
* Description    : ENBALE or DISABLE an SCU interrupt
439 
* Input          : -SCU_IT:   interrupt mask
440 
*                  -NewState: ENABLE or DISABLE
441 
* Output         : None
442 
* Return         : None
443 
*******************************************************************************/
444 
void SCU_ITConfig(u32 SCU_IT, FunctionalState NewState)
445 
{
446 
  if (NewState==ENABLE)
447 
  SCU->ITCMSK&=~SCU_IT;                    /*IT enable */
448 
  else
449 
  SCU->ITCMSK|=SCU_IT;                     /*IT disable( mask)*/
450 
}
451 
 
452 
/*******************************************************************************
453 
* Function Name  : SCU_GetFlagStatus
454 
* Description    : Returns flag status
455 
* Input          : SCU_Flag
456 
* Output         : NONE
457 
* Return         : SET or RESET
458 
*******************************************************************************/
459 
FlagStatus SCU_GetFlagStatus(u32 SCU_Flag)
460 
{
461 
  if (SCU->SYSSTATUS&SCU_Flag)
462 
  return SET;
463 
  else return RESET;
464 
}
465 
 
466 
/*******************************************************************************
467 
* Function Name  : SCU_ClearFlag
468 
* Description    : Clears a SYSTATUS Flag
469 
* Input          : SCU_Flag
470 
* Output         : None
471 
* Return         : None
472 
*******************************************************************************/
473 
void SCU_ClearFlag(u32 SCU_Flag)
474 
{
475 
  SCU->SYSSTATUS = SCU_Flag;
476 
}
477 
/*******************************************************************************
478 
* Function Name  : SCU_GetPLLfreqValue
479 
* Description    : Gets the current PLL frequency
480 
* Input          : None
481 
* Output         : None
482 
* Return         : PLL frequency (KHz)
483 
*******************************************************************************/
484 
u32 SCU_GetPLLFreqValue(void)
485 
{
486 
  u8 PLL_M;
487 
  u8 PLL_N;
488 
  u8 PLL_P;
489 
 
490 
  PLL_M = SCU->PLLCONF&0xFF;
491 
  PLL_N = (SCU->PLLCONF&0xFF00)>>8;
492 
  PLL_P = (SCU->PLLCONF&0x70000)>>16;
493 
 
494 
  if ((PLL_M>0)&&(PLL_N>0))
495 
  return (u32)(((_Main_Crystal*2)*PLL_N)/(PLL_M<<PLL_P));
496 
 
497 
  else return 0;
498 
}
499 
/*******************************************************************************
500 
* Function Name  : SCU_GetMCLKFreqValue
501 
* Description    : Gets the current MCLK frequency
502 
* Input          : None
503 
* Output         : None
504 
* Return         : MCLK frequency (KHz)
505 
*******************************************************************************/
506 
u32 SCU_GetMCLKFreqValue(void)
507 
{
508 
  if ((SCU->CLKCNTR&0x3) == 0x2) return (u32)(_Main_Crystal);
509 
  if ((SCU->CLKCNTR&0x3) == 0x1) return (u32)(32);
510 
  else return (SCU_GetPLLFreqValue());
511 
}
512 
 
513 
/*******************************************************************************
514 
* Function Name  : SCU_GetRCLKFreqValue
515 
* Description    : Gets the current RCLK frequency
516 
* Input          : None
517 
* Output         : None
518 
* Return         : RCLK frequency (KHz)
519 
*******************************************************************************/
520 
u32 SCU_GetRCLKFreqValue(void)
521 
{
522 
  u8 RCLK_Div;
523 
  RCLK_Div = (SCU->CLKCNTR&0x1C)>>2;
524 
  if (RCLK_Div==0x5) RCLK_Div=10;
525 
  return (u32)(SCU_GetMCLKFreqValue() >>RCLK_Div);
526 
}
527 
 
528 
/*******************************************************************************
529 
* Function Name  : SCU_GetHCLKFreqValue
530 
* Description    : Gets the current PCLK frequency
531 
* Input          : None
532 
* Output         : None
533 
* Return         : HCLK frequency (KHz)
534 
*******************************************************************************/
535 
u32 SCU_GetHCLKFreqValue(void)
536 
{
537 
  u8 HCLK_Div;
538 
  HCLK_Div = (SCU->CLKCNTR&0x60)>>5;
539 
  return (u32)(SCU_GetRCLKFreqValue() >>HCLK_Div);
540 
}
541 
 
542 
/*******************************************************************************
543 
* Function Name  : SCU_GetPCLKFreqValue
544 
* Description    : Gets the current HCLK frequency
545 
* Input          : None
546 
* Output         : None
547 
* Return         : PCLK frequency (KHz)
548 
*******************************************************************************/
549 
u32 SCU_GetPCLKFreqValue(void)
550 
{
551 
  u8 PCLK_Div;
552 
  PCLK_Div = (SCU->CLKCNTR&0x180)>>7;
553 
  return (u32)(SCU_GetRCLKFreqValue() >>PCLK_Div);
554 
}
555 
 
556 
/*******************************************************************************
557 
* Function Name  : SCU_WakeUpLineConfig
558 
* Description    : Configures an External interrupt as WakeUp line
559 
* Input          : EXTint : 0 -> 31
560 
* Output         : None
561 
* Return         : None
562 
*******************************************************************************/
563 
void SCU_WakeUpLineConfig(u8 EXTint)
564 
{
565 
  if (EXTint < 8)
566 
  {
567 
    SCU->WKUPSEL&=~0x7;
568 
    SCU->WKUPSEL|=EXTint;
569 
  }
570 
  else if (EXTint<16)
571 
  {
572 
    SCU->WKUPSEL&=~0x38;
573 
    SCU->WKUPSEL|=(EXTint-8)<<3;
574 
  }
575 
  else if (EXTint<24)
576 
  {
577 
    SCU->WKUPSEL&=~0x1C0;
578 
    SCU->WKUPSEL|=(EXTint-16)<<6;
579 
  }
580 
  else
581 
  {
582 
    SCU->WKUPSEL&=~0xE00;
583 
    SCU->WKUPSEL|=(EXTint-24)<<9;
584 
  }
585 
}
586 
 
587 
/*******************************************************************************
588 
* Function Name  : SCU_SpecIntRunModeConfig
589 
* Description    : Enables or Disables the Special Run mode
590 
* Input          : newstate = ENABLE or DISABLE
591 
* Output         : None
592 
* Return         : None
593 
*******************************************************************************/
594 
void SCU_SpecIntRunModeConfig(FunctionalState NewState)
595 
{
596 
  if (NewState == ENABLE)
597 
  SCU->PWRMNG |=0x8;
598 
  else
599 
  SCU->PWRMNG &=~0x8;
600 
}
601 
/*******************************************************************************
602 
* Function Name  : SCU_EnterIdleMode
603 
* Description    : Enters in Idle mode
604 
* Input          : None
605 
* Output         : None
606 
* Return         : None
607 
*******************************************************************************/
608 
void SCU_EnterIdleMode(void)
609 
{
610 
  SCU->PWRMNG |=0x1;
611 
}
612 
/*******************************************************************************
613 
* Function Name  : SCU_EnterSleepMode
614 
* Description    : Enters in Sleep mode
615 
* Input          : None
616 
* Output         : None
617 
* Return         : None
618 
*******************************************************************************/
619 
void SCU_EnterSleepMode(void)
620 
{
621 
  SCU->PWRMNG |=0x2;
622 
}
623 
 
624 
/*******************************************************************************
625 
* Function Name  : SCU_UARTIrDAConfig
626 
* Description    : Enable or Disable the Irda mode for UARTx
627 
* Input          : - UARTx :x=0,1 or 2
628 
*                  - UART_IrDA_Mode : SCU_UARTMode_IrDA or SCU_UARTMode_UART
629 
* Output         :  None
630 
* Return         :  None
631 
*******************************************************************************/
632 
void SCU_UARTIrDASelect(UART_TypeDef * UARTx, u8 UART_IrDA_Mode)
633 
{
634 
  if (UART_IrDA_Mode == SCU_UARTMode_IrDA)
635 
  {
636 
    if (UARTx== UART0) SCU->SCR0 |=0x400;
637 
    else if (UARTx==UART1) SCU->SCR0 |=0x800;
638 
    else SCU->SCR0 |=0x1000;
639 
  }
640 
  else
641 
  {
642 
    if (UARTx== UART0) SCU->SCR0 &=~0x400;
643 
    else if (UARTx==UART1) SCU->SCR0 &=~0x800;
644 
    else SCU->SCR0 &=~0x1000;
645 
  }
646 
}
647 
/*******************************************************************************
648 
* Function Name  : SCU_PFQBCCmd
649 
* Description    : Enable or Disable PFQBC
650 
* Input          : NewState : ENABLE or DISABLE
651 
* Output         : None
652 
* Return         : None
653 
*******************************************************************************/
654 
void SCU_PFQBCCmd(FunctionalState NewState)
655 
{
656 
  if (NewState==ENABLE)
657 
  SCU->SCR0 |=0x1;
658 
  else SCU->SCR0 &=~0x1;
659 
}
660 
 
661 
/******************* (C) COPYRIGHT 2006 STMicroelectronics *****END OF FILE****/

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