Diff: LPC1768.c

Revision:

1:2c52307d223f

diff -r e255ce830c49 -r 2c52307d223f LPC1768.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LPC1768.c	Thu Dec 02 12:32:18 2010 +0000
@@ -0,0 +1,97 @@
+#include "LPC17xx.h"
+#include "core_cm3.h"
+#include "cmsis_nvic.h"
+#include "LPC1768.h"
+#include "main.h"
+
+void PLL0_init(void) {
+
+    // Set main clk as main oscillator
+    CLKSRCSEL = 1;
+
+    PLL0_disconnect();
+
+    PLL0_disable();
+
+    // Set PLL0 multiplier
+    PLL0CFG = PLLMULT;
+
+    // Feed the PLL
+    PLL0FEED = 0xAA;
+    PLL0FEED = 0x55;
+
+    PLL0_enable();
+
+    // Set CPU clock divider
+    CCLKCFG = 2;
+
+    // Wait for PLOCK0 to become 1
+    while ((PLL0STAT & (1<<26)) == 0x00);
+
+    PLL0_connect();
+
+}
+
+void PLL0_disconnect(void) {
+
+    // Disconnect the PLL0
+    PLL0CON &= ~(1<<1); /* Disconnect the main PLL (PLL0) */
+
+    // Feed the PLL
+    PLL0FEED = 0xAA;
+    PLL0FEED = 0x55;
+
+    // Wait for main PLL (PLL0) to disconnect
+    while ((PLL0STAT & (1<<25)) != 0x00);
+
+}
+
+void PLL0_connect(void) {
+
+    // Connect to the main PLL (PLL0)
+    PLL0CON |= 1<<1;
+
+    // Feed the PLL
+    PLL0FEED = 0xAA;
+    PLL0FEED = 0x55;
+
+    // Wait for main PLL (PLL0) to connect
+    while ((PLL0STAT & (1<<25)) == 0x00);
+
+}
+
+void PLL0_disable(void) {
+
+    // Turn off the main PLL (PLL0)
+    PLL0CON &= ~(1<<0);
+
+    // Feed the PLL
+    PLL0FEED = 0xAA;
+    PLL0FEED = 0x55;
+
+    // Wait for main PLL (PLL0) to shut down
+    while ((PLL0STAT & (1<<24)) != 0x00);
+
+}
+
+void PLL0_enable(void) {
+
+    // Turn on the main PLL (PLL0)
+    PLL0CON |= 1<<0;
+
+    // Feed the PLL
+    PLL0FEED = 0xAA;
+    PLL0FEED = 0x55;
+
+    // Wait for main PLL (PLL0) to come up
+    while ((PLL0STAT & (1<<24)) == 0x00);
+
+}
+
+void LED_init(void) {
+
+    // Set output direction for LEDs
+    FIODIR |= LED_MASK;
+
+}
+