Diff: usbd_LPC1549.c

Revision:

0:ef2c0c52abc4

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/usbd_LPC1549.c	Fri Mar 14 09:14:16 2014 +0000
@@ -0,0 +1,59 @@
+#include <rl_usb.h>
+#include <LPC15xx.h>
+
+/*
+ *  USB Device Initialize Function
+ *   Called by the User to initialize USB Device
+ *    Return Value:    None
+ */
+
+void USBD_Init (void)
+{
+	/* Set USB PLL input to main oscillator */
+    LPC_SYSCON->USBPLLCLKSEL = 0x01;
+    /* Setup USB PLL  (FCLKIN = 12MHz) * 4 = 48MHz
+	   MSEL = 3 (this is pre-decremented), PSEL = 1 (for P = 2)
+	   FCLKOUT = FCLKIN * (MSEL + 1) = 12MHz * 4 = 48MHz
+	   FCCO = FCLKOUT * 2 * P = 48MHz * 2 * 2 = 192MHz (within FCCO range) */
+    LPC_SYSCON->USBPLLCTRL = 3|(1<<6);
+
+	/* Powerup USB PLL */  
+    LPC_SYSCON->PDRUNCFG &= ~(1<<23);
+
+    /* Wait for PLL to lock */
+    while(!(LPC_SYSCON->USBPLLSTAT&0x01));
+
+    /* enable USB main clock */
+    LPC_SYSCON->USBCLKSEL = 0x02;
+    LPC_SYSCON->USBCLKDIV = 1;
+    /* Enable AHB clock to the USB block. */
+    LPC_SYSCON->SYSAHBCLKCTRL1 |= (1<<23);
+    /* power UP USB Phy */
+    LPC_SYSCON->PDRUNCFG &= ~(1<<9);
+    /* Reset USB block */
+    LPC_SYSCON->PRESETCTRL1 |= (1<23);
+}
+
+/*
+ *  USB Device Connect Function
+ *   Called by the User to Connect/Disconnect USB Device
+ *    Parameters:      con:   Connect/Disconnect
+ *    Return Value:    None
+ */
+
+void USBD_Connect(uint8_t con)
+{
+    if (con) {
+        NVIC_EnableIRQ(USB_IRQ_IRQn);
+    } else {
+        NVIC_DisableIRQ(USB_IRQ_IRQn);
+    }
+}
+
+/*
+ *  USB Device Interrupt Service Routine
+ */
+
+void USB_IRQ_IRQHandler(void) {
+  pUsbApi->hw->ISR(hUsb);
+}