| NUC029FAE BSP V3.01.002 The Board Support Package for NUC029FAE

clk.c
Go to the documentation of this file.
1 /**************************************************************************/
12 #include "NUC029FAE.h"
30 void CLK_DisableCKO(void)
31 {
32 /* Disable CKO clock source */
33 CLK->APBCLK &= (~CLK_APBCLK_FDIV_EN_Msk);
34 }
35
53 void CLK_EnableCKO(uint32_t u32ClkSrc, uint32_t u32ClkDiv, uint32_t u32ClkDivBy1En)
54 {
55 /* CKO = clock source / 2^(u32ClkDiv + 1) */
56 CLK->FRQDIV = CLK_FRQDIV_DIVIDER_EN_Msk | u32ClkDiv | u32ClkDivBy1En<<CLK_FRQDIV_DIVIDER1_Pos;
57
58 /* Enable CKO clock source */
59 CLK->APBCLK |= CLK_APBCLK_FDIV_EN_Msk;
60
61 /* Select CKO clock source */
62 CLK->CLKSEL2 = (CLK->CLKSEL2 & (~CLK_CLKSEL2_FRQDIV_S_Msk)) | u32ClkSrc;
63 }
64
69 void CLK_PowerDown(void)
70 {
71 SCB->SCR = SCB_SCR_SLEEPDEEP_Msk;
72 CLK->PWRCON |= (CLK_PWRCON_PWR_DOWN_EN_Msk | CLK_PWRCON_PD_WU_STS_Msk);
73 __WFI();
74 }
75
80 void CLK_Idle(void)
81 {
82 CLK->PWRCON |= (CLK_PWRCON_PWR_DOWN_EN_Msk | CLK_PWRCON_PD_WU_STS_Msk);
83 __WFI();
84 }
85
90 uint32_t CLK_GetHXTFreq(void)
91 {
92 if(CLK->PWRCON & CLK_PWRCON_XTL12M )
93 return __XTAL12M;
94 else
95 return 0;
96 }
97
102 uint32_t CLK_GetLXTFreq(void)
103 {
104 if(CLK->PWRCON & CLK_PWRCON_LXT )
105 return __XTAL32K;
106 else
107 return 0;
108 }
109
114 uint32_t CLK_GetHCLKFreq(void)
115 {
116 SystemCoreClockUpdate();
117 return SystemCoreClock;
118 }
119
120
125 uint32_t CLK_GetCPUFreq(void)
126 {
127 SystemCoreClockUpdate();
128 return SystemCoreClock;
129 }
130
141 void CLK_SetHCLK(uint32_t u32ClkSrc, uint32_t u32ClkDiv)
142 {
143 CLK->CLKSEL0 = (CLK->CLKSEL0 & ~CLK_CLKSEL0_HCLK_S_Msk) | u32ClkSrc;
144 CLK->CLKDIV = (CLK->CLKDIV & ~CLK_CLKDIV_HCLK_N_Msk) | u32ClkDiv;
145 }
146
185 void CLK_SetModuleClock(uint32_t u32ModuleIdx, uint32_t u32ClkSrc, uint32_t u32ClkDiv)
186 {
187 uint32_t u32tmp=0,u32sel=0,u32div=0;
188
189 if(MODULE_CLKSEL_Msk(u32ModuleIdx)!=MODULE_NoMsk)
190 {
191 u32sel = (uint32_t)&CLK->CLKSEL0+((MODULE_CLKSEL(u32ModuleIdx))*4);
192 u32tmp = *(volatile uint32_t *)(u32sel);
193 u32tmp = ( u32tmp & ~(MODULE_CLKSEL_Msk(u32ModuleIdx)<<MODULE_CLKSEL_Pos(u32ModuleIdx)) ) | u32ClkSrc;
194 *(volatile uint32_t *)(u32sel) = u32tmp;
195 }
196
197 if(MODULE_CLKDIV_Msk(u32ModuleIdx)!=MODULE_NoMsk)
198 {
199 u32div =(uint32_t)&CLK->CLKDIV+((MODULE_CLKDIV(u32ModuleIdx))*4);
200 u32tmp = *(volatile uint32_t *)(u32div);
201 u32tmp = ( u32tmp & ~(MODULE_CLKDIV_Msk(u32ModuleIdx)<<MODULE_CLKDIV_Pos(u32ModuleIdx)) ) | u32ClkDiv;
202 *(volatile uint32_t *)(u32div) = u32tmp;
203 }
204 }
205
215 void CLK_SetSysTickClockSrc(uint32_t u32ClkSrc)
216 {
217 CLK->CLKSEL0 = (CLK->CLKSEL0 & ~CLK_CLKSEL0_STCLK_S_Msk) | u32ClkSrc;
218 }
219
228 void CLK_EnableXtalRC(uint32_t u32ClkMask)
229 {
230 CLK->PWRCON |=u32ClkMask;
231 }
232
241 void CLK_DisableXtalRC(uint32_t u32ClkMask)
242 {
243 CLK->PWRCON &=~u32ClkMask;
244 }
245
263 void CLK_EnableModuleClock(uint32_t u32ModuleIdx)
264 {
265 *(volatile uint32_t *)((uint32_t)&CLK->APBCLK+(MODULE_APBCLK(u32ModuleIdx)*4)) |= 1<<MODULE_IP_EN_Pos(u32ModuleIdx);
266 }
267
285 void CLK_DisableModuleClock(uint32_t u32ModuleIdx)
286 {
287 *(volatile uint32_t *)((uint32_t)&CLK->APBCLK+(MODULE_APBCLK(u32ModuleIdx)*4)) &= ~(1<<MODULE_IP_EN_Pos(u32ModuleIdx));
288 }
289
298 void CLK_SysTickDelay(uint32_t us)
299 {
300 SysTick->LOAD = us * CyclesPerUs;
301 SysTick->VAL = (0x00);
302 SysTick->CTRL = SysTick_CTRL_CLKSOURCE_Msk | SysTick_CTRL_ENABLE_Msk;
303
304 /* Waiting for down-count to zero */
305 while((SysTick->CTRL & SysTick_CTRL_COUNTFLAG_Msk) == 0);
306 SysTick->CTRL = 0;
307 }
308
322 uint32_t CLK_WaitClockReady(uint32_t u32ClkMask)
323 {
324 int32_t i32TimeOutCnt;
325
326 i32TimeOutCnt = __HSI / 200; /* About 5ms */
327
328 while((CLK->CLKSTATUS & u32ClkMask) != u32ClkMask)
329 {
330 if(i32TimeOutCnt-- <= 0)
331 return 0;
332 }
333 return 1;
334 }
335
336 /* end of group NUC029FAE_CLK_EXPORTED_FUNCTIONS */
338 /* end of group NUC029FAE_CLK_Driver */
340 /* end of group NUC029FAE_Device_Driver */
342
343 /*** (C) COPYRIGHT 2013 Nuvoton Technology Corp. ***/
MODULE_NoMsk
#define MODULE_NoMsk
Definition: clk.h:120
NUC029FAE.h
NUC029FAE peripheral access layer header file. This file contains all the peripheral register's defin...
MODULE_CLKDIV
#define MODULE_CLKDIV(x)
Definition: clk.h:116
CLK_DisableCKO
void CLK_DisableCKO(void)
This function disable frequency output function.
Definition: clk.c:30
MODULE_IP_EN_Pos
#define MODULE_IP_EN_Pos(x)
Definition: clk.h:119
CLK_GetHCLKFreq
uint32_t CLK_GetHCLKFreq(void)
This function get HCLK frequency. The frequency unit is Hz.
Definition: clk.c:114
SystemCoreClockUpdate
void SystemCoreClockUpdate(void)
Updates the SystemCoreClock with current core Clock retrieved from CPU registers.
Definition: system_NUC029FAE.c:31
CLK_PowerDown
void CLK_PowerDown(void)
This function let system enter to Power-down mode.
Definition: clk.c:69
CLK_EnableModuleClock
void CLK_EnableModuleClock(uint32_t u32ModuleIdx)
This function enable module clock.
Definition: clk.c:263
__HSI
#define __HSI
Definition: system_NUC029FAE.h:34
CLK_GetCPUFreq
uint32_t CLK_GetCPUFreq(void)
This function get CPU frequency. The frequency unit is Hz.
Definition: clk.c:125
CLK_GetHXTFreq
uint32_t CLK_GetHXTFreq(void)
This function get external high frequency crystal frequency. The frequency unit is Hz.
Definition: clk.c:90
CLK_GetLXTFreq
uint32_t CLK_GetLXTFreq(void)
This function get external low frequency crystal frequency. The frequency unit is Hz.
Definition: clk.c:102
SystemCoreClock
uint32_t SystemCoreClock
Definition: system_NUC029FAE.c:20
CLK_SysTickDelay
void CLK_SysTickDelay(uint32_t us)
This function execute delay function.
Definition: clk.c:298
CLK_DisableXtalRC
void CLK_DisableXtalRC(uint32_t u32ClkMask)
This function disable clock source.
Definition: clk.c:241
__XTAL12M
#define __XTAL12M
Definition: system_NUC029FAE.h:29
__XTAL32K
#define __XTAL32K
Definition: system_NUC029FAE.h:30
MODULE_APBCLK
#define MODULE_APBCLK(x)
Definition: clk.h:112
MODULE_CLKSEL_Pos
#define MODULE_CLKSEL_Pos(x)
Definition: clk.h:115
CLK_EnableXtalRC
void CLK_EnableXtalRC(uint32_t u32ClkMask)
This function enable clock source.
Definition: clk.c:228
CLK
#define CLK
Pointer to CLK register structure.
Definition: NUC029FAE.h:3228
CLK_Idle
void CLK_Idle(void)
This function let system enter to Idle mode.
Definition: clk.c:80
MODULE_CLKSEL_Msk
#define MODULE_CLKSEL_Msk(x)
Definition: clk.h:114
CLK_PWRCON_XTL12M
#define CLK_PWRCON_XTL12M
Definition: clk.h:38
CLK_EnableCKO
void CLK_EnableCKO(uint32_t u32ClkSrc, uint32_t u32ClkDiv, uint32_t u32ClkDivBy1En)
This function enable frequency divider module clock, enable frequency divider clock function and conf...
Definition: clk.c:53
MODULE_CLKDIV_Msk
#define MODULE_CLKDIV_Msk(x)
Definition: clk.h:117
CLK_SetModuleClock
void CLK_SetModuleClock(uint32_t u32ModuleIdx, uint32_t u32ClkSrc, uint32_t u32ClkDiv)
This function set selected module clock source and module clock divider.
Definition: clk.c:185
MODULE_CLKDIV_Pos
#define MODULE_CLKDIV_Pos(x)
Definition: clk.h:118
CLK_PWRCON_LXT
#define CLK_PWRCON_LXT
Definition: clk.h:41
MODULE_CLKSEL
#define MODULE_CLKSEL(x)
Definition: clk.h:113
CLK_SetSysTickClockSrc
void CLK_SetSysTickClockSrc(uint32_t u32ClkSrc)
This function set SysTick clock source.
Definition: clk.c:215
CLK_SetHCLK
void CLK_SetHCLK(uint32_t u32ClkSrc, uint32_t u32ClkDiv)
This function set HCLK clock source and HCLK clock divider.
Definition: clk.c:141
CLK_WaitClockReady
uint32_t CLK_WaitClockReady(uint32_t u32ClkMask)
This function check selected clock source status.
Definition: clk.c:322
CLK_DisableModuleClock
void CLK_DisableModuleClock(uint32_t u32ModuleIdx)
This function disable module clock.
Definition: clk.c:285
CyclesPerUs
uint32_t CyclesPerUs
Definition: system_NUC029FAE.c:21