Marco Graf / Mbed 2 deprecated Check_PLL

PLL Check with changed USB-Serial baudrate to 921600

Dependencies:   mbed

Files at this revision

API Documentation at this revision

Revision 0:cd464ee509f7, committed 2010-06-09

Comitter:
cedes
Date:
Wed Jun 09 12:40:20 2010 +0000
Commit message:

Changed in this revision

main.cpp Show annotated file Show diff for this revision Revisions of this file
mbed.bld Show annotated file Show diff for this revision Revisions of this file 
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Jun 09 12:40:20 2010 +0000
@@ -0,0 +1,32 @@
+#include "mbed.h"
+
+Serial pc(USBTX, USBRX); // tx, rx
+
+int main() {
+    int Fin = 12000000; // 12MHz XTAL
+    
+    pc.baud(921600);
+
+    pc.printf("PLL Registers:\n");
+    pc.printf(" - PLL0CFG = 0x%08X\n", LPC_SC->PLL0CFG);
+    pc.printf(" - CLKCFG  = 0x%08X\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:\n");
+    pc.printf(" - Fin = %d\n", Fin);
+    pc.printf(" - M   = %d\n", M);
+    pc.printf(" - N   = %d\n", N);
+    pc.printf(" - CCLKDIV = %d\n", CCLKDIV);
+
+    int Fcco = (2 * M * 12000000) / N;
+    int CCLK = Fcco / CCLKDIV;
+
+    pc.printf("Clock Results:\n");
+    pc.printf(" - Fcco = %d\n", Fcco);
+    pc.printf(" - CCLK = %d\n", CCLK);
+    
+    while(1);
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Wed Jun 09 12:40:20 2010 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/029aa53d7323