
see http://mbed.org/users/no2chem/notebook/mbed-clock-control--benchmarks/
main.cpp
- Committer:
- no2chem
- Date:
- 2010-01-24
- Revision:
- 0:b5d3bd64d2dc
File content as of revision 0:b5d3bd64d2dc:
#include "mbed.h" #include "ClockControl/ClockControl.h" #include "CoreMark/core_portme.h" int main() { while(1) { printf("mbed Clock Control test\r\n"); printf("(c) 2010 Michael Wei\r\n"); unsigned short newM = 12; unsigned short newN = 1; printf("Value of M? (default = 12):\r\n"); scanf("%d", &newM); printf("Value of N? (default = 1):\r\n"); scanf("%d", &newN); setSystemFrequency(0x3, 0x1, newM, newN); Serial pc(USBTX, USBRX); // tx, rx //This code by Simon Ford: http://mbed.org/forum/mbed/topic/229/?page=1#comment-1225 int Fin = 12000000; // 12MHz XTAL pc.printf("PLL Registers:\r\n"); pc.printf(" - PLL0CFG = 0x%08X\r\n", LPC_SC->PLL0CFG); pc.printf(" - CLKCFG = 0x%08X\r\n", LPC_SC->CCLKCFG); int M = (LPC_SC->PLL0CFG & 0xFFFF) + 1; int N = (LPC_SC->PLL0CFG >> 16) + 1; int CCLKDIV = LPC_SC->CCLKCFG + 1; pc.printf("Clock Variables:\r\n"); pc.printf(" - Fin = %d\r\n", Fin); pc.printf(" - M = %d\r\n", M); pc.printf(" - N = %d\r\n", N); pc.printf(" - CCLKDIV = %d\r\n", CCLKDIV); int Fcco = (2 * M * 12000000) / N; int CCLK = Fcco / CCLKDIV; pc.printf("Clock Results:\r\n"); pc.printf(" - Fcco = %d\r\n", Fcco); printf(" - CCLK = %d\r\n", CCLK); printf("Run CoreMark? (Y/N)\n"); char buf[8]; scanf("%s", buf); if (buf[0] == 'y' || buf[0] == 'Y') { mainCoreMark(); } wait(1); NVIC_SystemReset(); } }