Test application based on the AVR examples provided by ThaiEasyElec for their ELT240320ATP breakout board -- library works rather slow on the mbed platform.
ClockControl.cpp@0:4395705c8647, 2010-03-10 (annotated)
- Committer:
- robodude666
- Date:
- Wed Mar 10 21:17:41 2010 +0000
- Revision:
- 0:4395705c8647
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
robodude666 | 0:4395705c8647 | 1 | #include "ClockControl.h" |
robodude666 | 0:4395705c8647 | 2 | |
robodude666 | 0:4395705c8647 | 3 | void setPLL0Frequency(unsigned char clkSrc, unsigned short M, unsigned char N) |
robodude666 | 0:4395705c8647 | 4 | { |
robodude666 | 0:4395705c8647 | 5 | LPC_SC->CLKSRCSEL = clkSrc; |
robodude666 | 0:4395705c8647 | 6 | LPC_SC->PLL0CFG = (((unsigned int)N-1) << 16) | M-1; |
robodude666 | 0:4395705c8647 | 7 | LPC_SC->PLL0CON = 0x01; |
robodude666 | 0:4395705c8647 | 8 | LPC_SC->PLL0FEED = 0xAA; |
robodude666 | 0:4395705c8647 | 9 | LPC_SC->PLL0FEED = 0x55; |
robodude666 | 0:4395705c8647 | 10 | while (!(LPC_SC->PLL0STAT & (1<<26))); |
robodude666 | 0:4395705c8647 | 11 | |
robodude666 | 0:4395705c8647 | 12 | LPC_SC->PLL0CON = 0x03; |
robodude666 | 0:4395705c8647 | 13 | LPC_SC->PLL0FEED = 0xAA; |
robodude666 | 0:4395705c8647 | 14 | LPC_SC->PLL0FEED = 0x55; |
robodude666 | 0:4395705c8647 | 15 | } |
robodude666 | 0:4395705c8647 | 16 | |
robodude666 | 0:4395705c8647 | 17 | void setPLL1Frequency(unsigned char clkSrc, unsigned short M, unsigned char N) |
robodude666 | 0:4395705c8647 | 18 | { |
robodude666 | 0:4395705c8647 | 19 | LPC_SC->CLKSRCSEL = clkSrc; |
robodude666 | 0:4395705c8647 | 20 | LPC_SC->PLL1CFG = (((unsigned int)N-1) << 16) | M-1; |
robodude666 | 0:4395705c8647 | 21 | LPC_SC->PLL1CON = 0x01; |
robodude666 | 0:4395705c8647 | 22 | LPC_SC->PLL1FEED = 0xAA; |
robodude666 | 0:4395705c8647 | 23 | LPC_SC->PLL1FEED = 0x55; |
robodude666 | 0:4395705c8647 | 24 | while (!(LPC_SC->PLL1STAT & (1<<26))); |
robodude666 | 0:4395705c8647 | 25 | |
robodude666 | 0:4395705c8647 | 26 | LPC_SC->PLL1CON = 0x03; |
robodude666 | 0:4395705c8647 | 27 | LPC_SC->PLL1FEED = 0xAA; |
robodude666 | 0:4395705c8647 | 28 | LPC_SC->PLL1FEED = 0x55; |
robodude666 | 0:4395705c8647 | 29 | } |
robodude666 | 0:4395705c8647 | 30 | |
robodude666 | 0:4395705c8647 | 31 | unsigned int setSystemFrequency(unsigned char clkDivider, unsigned char clkSrc, unsigned short M, unsigned char N) |
robodude666 | 0:4395705c8647 | 32 | { |
robodude666 | 0:4395705c8647 | 33 | setPLL0Frequency(clkSrc, M, N); |
robodude666 | 0:4395705c8647 | 34 | LPC_SC->CCLKCFG = clkDivider - 1; |
robodude666 | 0:4395705c8647 | 35 | SystemCoreClockUpdate(); |
robodude666 | 0:4395705c8647 | 36 | return SystemCoreClock; |
robodude666 | 0:4395705c8647 | 37 | } |