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/******************** (C) COPYRIGHT 2003 STMicroelectronics ********************
* File Name          : rccu.c
* Author             : MCD Application Team
* Date First Issued  : 07/28/2003
* Description        : This file provides all the RCCU software functions
********************************************************************************
* History:
*  30/11/2004 : V2.0
*  14/07/2004 : V1.3
*  01/01/2004 : V1.2
*******************************************************************************
 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.
*******************************************************************************/
#include "rccu.h"
 
/*******************************************************************************
* Function Name  : RCCU_PLL1Config
* Description    : Configures the PLL1 div & mul factors.
* Input          : New_Mul ( RCCU_PLL1_Mul_12, RCCU_PLL1_Mul_16, RCCU_PLL1_Mul_20,
*                  RCCU_PLL1_Mul_24 )
*                : New_Div ( RCCU_Div_1, RCCU_Div_2, RCCU_Div_3, RCCU_Div_4,
*                  RCCU_Div_5, RCCU_Div_6, RCCU_Div_7)
* Return         : None
*******************************************************************************/
void RCCU_PLL1Config ( RCCU_PLL1_Mul New_Mul, RCCU_PLL_Div New_Div )
{
  u32 Tmp = ( RCCU->PLL1CR & ~RCCU_MX_Mask ) | ( New_Mul << RCCU_MX_Index );
  RCCU->PLL1CR = ( Tmp & ~RCCU_DX_Mask ) | New_Div | 0x40;
}
 
/*******************************************************************************
* Function Name  : RCCU_PLL2Config
* Description    : Configures the PLL2 div & mul factors.
* Input          : New_Mul ( RCCU_PLL2_Mul_12, RCCU_PLL2_Mul_16, RCCU_PLL2_Mul_20,
*                  RCCU_Mul_PLL2_28 )
*                : New_Div ( RCCU_Div_1, RCCU_Div_2, RCCU_Div_3, RCCU_Div_4,
*                  RCCU_Div_5, RCCU_Div_6, RCCU_Div_7)
* Return         : None
*******************************************************************************/
void RCCU_PLL2Config ( RCCU_PLL2_Mul New_Mul, RCCU_PLL_Div New_Div )
{
  u32 Tmp = ( PCU->PLL2CR & ~RCCU_MX_Mask ) | ( New_Mul << RCCU_MX_Index );
  PCU->PLL2CR = ( Tmp & ~RCCU_DX_Mask ) | ( New_Div  | RCCU_FREEN_Mask );
}
 
/*******************************************************************************
* Function Name  : RCCU_RCLKSourceConfig
* Description    : Selects the RCLK source clock
* Input          : New_Clock ( RCCU_PLL1_Output, RCCU_CLOCK2_16, RCCU_CLOCK2 )
* Return         : None
*******************************************************************************/
void RCCU_RCLKSourceConfig ( RCCU_RCLK_Clocks New_Clock )
{
  switch ( New_Clock )
  {
    case RCCU_CLOCK2    :{// Resets the CSU_Cksel bit in clk_flag
                             RCCU->CFR &= ~RCCU_CSU_CKSEL_Mask;
                          // Set the CK2_16 Bit in the CFR
                             RCCU->CFR |= RCCU_CK2_16_Mask;
                          // Deselect The CKAF
                             RCCU->CCR   &= ~RCCU_CKAF_SEL_Mask;
                           // switch off the PLL1
                              RCCU->PLL1CR=((RCCU->PLL1CR & ~RCCU_DX_Mask)\
                              |0x00000003) & ~RCCU_FREEN_Mask;
                              break;}
    case RCCU_CLOCK2_16  :{// ReSet the CK2_16 Bit in the CFR
                              RCCU->CFR &= ~RCCU_CK2_16_Mask;
                           // Deselect The CKAF
                              RCCU->CCR   &= ~RCCU_CKAF_SEL_Mask;
                           // switch off the PLL1
                              RCCU->PLL1CR=((RCCU->PLL1CR & ~RCCU_DX_Mask)\
                              |0x00000003) & ~RCCU_FREEN_Mask;
                              break;}
    case RCCU_PLL1_Output:{// Set the CK2_16 Bit in the CFR
                              RCCU->CFR = RCCU->CFR | RCCU_CK2_16_Mask;
                           // Waits the PLL1 to lock if DX bits are different from '111'
                           // If all DX bit are set the PLL lock flag in meaningless
                              if (( RCCU->PLL1CR & 0x0007 ) != 7)
                                while(!(RCCU->CFR & RCCU_LOCK_Mask));
                           // Deselect The CKAF
                              RCCU->CCR  &= ~RCCU_CKAF_SEL_Mask;
                           // Select The CSU_CKSEL
                              RCCU->CFR |= RCCU_CSU_CKSEL_Mask;
                              break;}
    case RCCU_RTC_CLOCK  :   {RCCU->CCR |= 0x04;
                              break;}
  }
}
 
/*******************************************************************************
* Function Name  : RCCU_RCLKClockSource
* Description    : Returns the current RCLK source clock
* Input          : None
* Return         : RCCU_PLL1_Output, RCCU_CLOCK2_16, RCCU_CLOCK2, RCCU_RTC_CLOCK
*******************************************************************************/
RCCU_RCLK_Clocks RCCU_RCLKClockSource ( void )
{
  if ((RCCU->CCR & 0x04)==0x04)
    return RCCU_RTC_CLOCK;
 
  else if ((RCCU->CFR & RCCU_CK2_16_Mask)==0)
    return RCCU_CLOCK2_16;
 
  else if (RCCU->CFR & RCCU_CSU_CKSEL_Mask)
    return RCCU_PLL1_Output;
 
  else
    return RCCU_CLOCK2;
}
 
/*******************************************************************************
* Function Name  : RCCU_USBClockSource
* Description    : Gets the RCLK source clock
* Input          : None
* Return         : RCCU_USB_Clocks ( RCCU_PLL2_Output, RCCU_USBCK )
*******************************************************************************/
RCCU_USB_Clocks RCCU_USBClockSource ( void )
{
  if ((PCU->PLL2CR & RCCU_USBEN_Mask ) >> RCCU_USBEN_Index == 1 )
     return RCCU_PLL2_Output;
  else return RCCU_USBCK;
}
 
/*******************************************************************************
* Function Name  : RCCU_FrequencyValue
* Description    : Calculates & Returns any internal RCCU clock frequency
*                  passed in parametres
* Input          : RCCU_Clocks ( RCCU_CLK2, RCCU_RCLK, RCCU_MCLK, RCCU_PCLK, RCCU_FCLK )
* Return         : u32
*******************************************************************************/
u32 RCCU_FrequencyValue ( RCCU_Clocks Internal_Clk )
{
  u32 Tmp;
  u8 Div, Mul;
  RCCU_RCLK_Clocks CurrentRCLK;
 
  Tmp = ( RCCU_Div2Status() == SET )? RCCU_Main_Osc / 2 :  RCCU_Main_Osc;
 
  if ( Internal_Clk == RCCU_CLK2 )
  {
   Div = 1;
   Mul = 1;
  }
  else
  { CurrentRCLK = RCCU_RCLKClockSource ();
    switch ( CurrentRCLK ){
      case RCCU_CLOCK2_16 : Div = 16;
                            Mul = 1;
                            break;
      case RCCU_CLOCK2    : Div = 1;
                            Mul = 1;
                            break;
      case RCCU_PLL1_Output :{Mul=(RCCU->PLL1CR & RCCU_MX_Mask ) >> RCCU_MX_Index;
                              switch ( Mul )
                              {case 0: Mul = 20; break;
                               case 1: Mul = 12; break;
                               case 2: Mul = 28; break;
                               case 3: Mul = 16; break;
                              }
                              Div = ( RCCU->PLL1CR & RCCU_DX_Mask ) + 1;
                              break;}
     case RCCU_RTC_CLOCK :  Mul = 1;
                            Div = 1;
                            Tmp = RCCU_RTC_Osc;
                            break;}}
 
  switch ( Internal_Clk ){
      case RCCU_MCLK :{Div <<= PCU->MDIVR & RCCU_FACT_Mask;
                       break;}
      case RCCU_PCLK :{Div <<=(PCU->PDIVR & RCCU_FACT2_Mask ) >> RCCU_FACT2_Index;
                       break;}
      case RCCU_FCLK :{Div <<=  PCU->PDIVR & 0x3;
                       break;}}
 
  return (Tmp * Mul) / Div;
}
 
/******************* (C) COPYRIGHT 2003 STMicroelectronics *****END OF FILE****/

Line No.	Rev	Author	Line
1	577	jeremybenn	`/****************** (C) COPYRIGHT 2003 STMicroelectronics ******************`
2			`* File Name : rccu.c`
3			`* Author : MCD Application Team`
4			`* Date First Issued : 07/28/2003`
5			`* Description : This file provides all the RCCU software functions`
6			`********************************************************************************`
7			`* History:`
8			`* 30/11/2004 : V2.0`
9			`* 14/07/2004 : V1.3`
10			`* 01/01/2004 : V1.2`
11			`*******************************************************************************`
12			`THE PRESENT SOFTWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS WITH`
13			`CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.`
14			`AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT, INDIRECT`
15			`OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE CONTENT`
16			`OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING INFORMATION`
17			`CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.`
18			`*******************************************************************************/`
19			`#include "rccu.h"`
20
21			`/*******************************************************************************`
22			`* Function Name : RCCU_PLL1Config`
23			`* Description : Configures the PLL1 div & mul factors.`
24			`* Input : New_Mul ( RCCU_PLL1_Mul_12, RCCU_PLL1_Mul_16, RCCU_PLL1_Mul_20,`
25			`* RCCU_PLL1_Mul_24 )`
26			`* : New_Div ( RCCU_Div_1, RCCU_Div_2, RCCU_Div_3, RCCU_Div_4,`
27			`* RCCU_Div_5, RCCU_Div_6, RCCU_Div_7)`
28			`* Return : None`
29			`*******************************************************************************/`
30			`void RCCU_PLL1Config ( RCCU_PLL1_Mul New_Mul, RCCU_PLL_Div New_Div )`
31			`{`
32			`u32 Tmp = ( RCCU->PLL1CR & ~RCCU_MX_Mask ) \| ( New_Mul << RCCU_MX_Index );`
33			`RCCU->PLL1CR = ( Tmp & ~RCCU_DX_Mask ) \| New_Div \| 0x40;`
34			`}`
35
36			`/*******************************************************************************`
37			`* Function Name : RCCU_PLL2Config`
38			`* Description : Configures the PLL2 div & mul factors.`
39			`* Input : New_Mul ( RCCU_PLL2_Mul_12, RCCU_PLL2_Mul_16, RCCU_PLL2_Mul_20,`
40			`* RCCU_Mul_PLL2_28 )`
41			`* : New_Div ( RCCU_Div_1, RCCU_Div_2, RCCU_Div_3, RCCU_Div_4,`
42			`* RCCU_Div_5, RCCU_Div_6, RCCU_Div_7)`
43			`* Return : None`
44			`*******************************************************************************/`
45			`void RCCU_PLL2Config ( RCCU_PLL2_Mul New_Mul, RCCU_PLL_Div New_Div )`
46			`{`
47			`u32 Tmp = ( PCU->PLL2CR & ~RCCU_MX_Mask ) \| ( New_Mul << RCCU_MX_Index );`
48			`PCU->PLL2CR = ( Tmp & ~RCCU_DX_Mask ) \| ( New_Div \| RCCU_FREEN_Mask );`
49			`}`
50
51			`/*******************************************************************************`
52			`* Function Name : RCCU_RCLKSourceConfig`
53			`* Description : Selects the RCLK source clock`
54			`* Input : New_Clock ( RCCU_PLL1_Output, RCCU_CLOCK2_16, RCCU_CLOCK2 )`
55			`* Return : None`
56			`*******************************************************************************/`
57			`void RCCU_RCLKSourceConfig ( RCCU_RCLK_Clocks New_Clock )`
58			`{`
59			`switch ( New_Clock )`
60			`{`
61			`case RCCU_CLOCK2 :{// Resets the CSU_Cksel bit in clk_flag`
62			`RCCU->CFR &= ~RCCU_CSU_CKSEL_Mask;`
63			`// Set the CK2_16 Bit in the CFR`
64			`RCCU->CFR \|= RCCU_CK2_16_Mask;`
65			`// Deselect The CKAF`
66			`RCCU->CCR &= ~RCCU_CKAF_SEL_Mask;`
67			`// switch off the PLL1`
68			`RCCU->PLL1CR=((RCCU->PLL1CR & ~RCCU_DX_Mask)\`
69			`\|0x00000003) & ~RCCU_FREEN_Mask;`
70			`break;}`
71			`case RCCU_CLOCK2_16 :{// ReSet the CK2_16 Bit in the CFR`
72			`RCCU->CFR &= ~RCCU_CK2_16_Mask;`
73			`// Deselect The CKAF`
74			`RCCU->CCR &= ~RCCU_CKAF_SEL_Mask;`
75			`// switch off the PLL1`
76			`RCCU->PLL1CR=((RCCU->PLL1CR & ~RCCU_DX_Mask)\`
77			`\|0x00000003) & ~RCCU_FREEN_Mask;`
78			`break;}`
79			`case RCCU_PLL1_Output:{// Set the CK2_16 Bit in the CFR`
80			`RCCU->CFR = RCCU->CFR \| RCCU_CK2_16_Mask;`
81			`// Waits the PLL1 to lock if DX bits are different from '111'`
82			`// If all DX bit are set the PLL lock flag in meaningless`
83			`if (( RCCU->PLL1CR & 0x0007 ) != 7)`
84			`while(!(RCCU->CFR & RCCU_LOCK_Mask));`
85			`// Deselect The CKAF`
86			`RCCU->CCR &= ~RCCU_CKAF_SEL_Mask;`
87			`// Select The CSU_CKSEL`
88			`RCCU->CFR \|= RCCU_CSU_CKSEL_Mask;`
89			`break;}`
90			`case RCCU_RTC_CLOCK : {RCCU->CCR \|= 0x04;`
91			`break;}`
92			`}`
93			`}`
94
95			`/*******************************************************************************`
96			`* Function Name : RCCU_RCLKClockSource`
97			`* Description : Returns the current RCLK source clock`
98			`* Input : None`
99			`* Return : RCCU_PLL1_Output, RCCU_CLOCK2_16, RCCU_CLOCK2, RCCU_RTC_CLOCK`
100			`*******************************************************************************/`
101			`RCCU_RCLK_Clocks RCCU_RCLKClockSource ( void )`
102			`{`
103			`if ((RCCU->CCR & 0x04)==0x04)`
104			`return RCCU_RTC_CLOCK;`
105
106			`else if ((RCCU->CFR & RCCU_CK2_16_Mask)==0)`
107			`return RCCU_CLOCK2_16;`
108
109			`else if (RCCU->CFR & RCCU_CSU_CKSEL_Mask)`
110			`return RCCU_PLL1_Output;`
111
112			`else`
113			`return RCCU_CLOCK2;`
114			`}`
115
116			`/*******************************************************************************`
117			`* Function Name : RCCU_USBClockSource`
118			`* Description : Gets the RCLK source clock`
119			`* Input : None`
120			`* Return : RCCU_USB_Clocks ( RCCU_PLL2_Output, RCCU_USBCK )`
121			`*******************************************************************************/`
122			`RCCU_USB_Clocks RCCU_USBClockSource ( void )`
123			`{`
124			`if ((PCU->PLL2CR & RCCU_USBEN_Mask ) >> RCCU_USBEN_Index == 1 )`
125			`return RCCU_PLL2_Output;`
126			`else return RCCU_USBCK;`
127			`}`
128
129			`/*******************************************************************************`
130			`* Function Name : RCCU_FrequencyValue`
131			`* Description : Calculates & Returns any internal RCCU clock frequency`
132			`* passed in parametres`
133			`* Input : RCCU_Clocks ( RCCU_CLK2, RCCU_RCLK, RCCU_MCLK, RCCU_PCLK, RCCU_FCLK )`
134			`* Return : u32`
135			`*******************************************************************************/`
136			`u32 RCCU_FrequencyValue ( RCCU_Clocks Internal_Clk )`
137			`{`
138			`u32 Tmp;`
139			`u8 Div, Mul;`
140			`RCCU_RCLK_Clocks CurrentRCLK;`
141
142			`Tmp = ( RCCU_Div2Status() == SET )? RCCU_Main_Osc / 2 : RCCU_Main_Osc;`
143
144			`if ( Internal_Clk == RCCU_CLK2 )`
145			`{`
146			`Div = 1;`
147			`Mul = 1;`
148			`}`
149			`else`
150			`{ CurrentRCLK = RCCU_RCLKClockSource ();`
151			`switch ( CurrentRCLK ){`
152			`case RCCU_CLOCK2_16 : Div = 16;`
153			`Mul = 1;`
154			`break;`
155			`case RCCU_CLOCK2 : Div = 1;`
156			`Mul = 1;`
157			`break;`
158			`case RCCU_PLL1_Output :{Mul=(RCCU->PLL1CR & RCCU_MX_Mask ) >> RCCU_MX_Index;`
159			`switch ( Mul )`
160			`{case 0: Mul = 20; break;`
161			`case 1: Mul = 12; break;`
162			`case 2: Mul = 28; break;`
163			`case 3: Mul = 16; break;`
164			`}`
165			`Div = ( RCCU->PLL1CR & RCCU_DX_Mask ) + 1;`
166			`break;}`
167			`case RCCU_RTC_CLOCK : Mul = 1;`
168			`Div = 1;`
169			`Tmp = RCCU_RTC_Osc;`
170			`break;}}`
171
172			`switch ( Internal_Clk ){`
173			`case RCCU_MCLK :{Div <<= PCU->MDIVR & RCCU_FACT_Mask;`
174			`break;}`
175			`case RCCU_PCLK :{Div <<=(PCU->PDIVR & RCCU_FACT2_Mask ) >> RCCU_FACT2_Index;`
176			`break;}`
177			`case RCCU_FCLK :{Div <<= PCU->PDIVR & 0x3;`
178			`break;}}`
179
180			`return (Tmp * Mul) / Div;`
181			`}`
182
183			`/***************** (C) COPYRIGHT 2003 STMicroelectronics *END OF FILE**/`

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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [ARM7_STR71x_IAR/] [Library/] [rccu.c] - Blame information for rev 583