clock control library written by Michael Wei
Dependents: IsuProject_LPC1768 int555 Gemini_Soloist_LPC1768 OSCtoCVConverter
Diff: ClockControl.cpp
- Revision:
- 0:bf8849c9b21a
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/ClockControl.cpp Wed Mar 28 10:45:42 2012 +0000 @@ -0,0 +1,37 @@ +#include "ClockControl.h" + +void setPLL0Frequency(unsigned char clkSrc, unsigned short cfg_m, unsigned char cfg_n) +{ + LPC_SC->CLKSRCSEL = clkSrc; + LPC_SC->PLL0CFG = (((unsigned int)cfg_n-1) << 16) | cfg_m-1; + LPC_SC->PLL0CON = 0x01; + LPC_SC->PLL0FEED = 0xAA; + LPC_SC->PLL0FEED = 0x55; + while (!(LPC_SC->PLL0STAT & (1<<26))); + + LPC_SC->PLL0CON = 0x03; + LPC_SC->PLL0FEED = 0xAA; + LPC_SC->PLL0FEED = 0x55; +} + +void setPLL1Frequency(unsigned char clkSrc, unsigned short cfg_m, unsigned char cfg_n) +{ + LPC_SC->CLKSRCSEL = clkSrc; + LPC_SC->PLL1CFG = (((unsigned int)cfg_n-1) << 16) | cfg_m-1; + LPC_SC->PLL1CON = 0x01; + LPC_SC->PLL1FEED = 0xAA; + LPC_SC->PLL1FEED = 0x55; + while (!(LPC_SC->PLL1STAT & (1<<26))); + + LPC_SC->PLL1CON = 0x03; + LPC_SC->PLL1FEED = 0xAA; + LPC_SC->PLL1FEED = 0x55; +} + +unsigned int setSystemFrequency(unsigned char clkDivider, unsigned char clkSrc, unsigned short cfg_m, unsigned char cfg_n) +{ + setPLL0Frequency(clkSrc, cfg_m, cfg_n); + LPC_SC->CCLKCFG = clkDivider - 1; + SystemCoreClockUpdate(); + return SystemCoreClock; +} \ No newline at end of file