Merge branch 'master' of ../wifishield

1 files changed, 101 insertions, 0 deletions

diff --git a/firmwares/wifishield/wifi_dnld/src/clocks.c b/firmwares/wifishield/wifi_dnld/src/clocks.c
new file mode 100644
index 0000000..cdd07fa
--- /dev/null
+++ b/firmwares/wifishield/wifi_dnld/src/clocks.c
@@ -0,0 +1,101 @@
+/* This source file is part of the ATMEL AVR-UC3-SoftwareFramework-1.7.0 Release */
+
+/*! \page License
+ * Copyright (C) 2009, H&D Wireless AB All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * 3. The name of H&D Wireless AB may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY H&D WIRELESS AB ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY AND
+ * SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+#include <avr32/io.h>
+#include "board.h"
+#include "clocks.h"
+#include "pm.h"
+#include "flashc.h"
+#include "gpio.h"
+
+/**
+ * Initializes the MCU system clocks.
+ */
+void
+init_sys_clocks(void)
+{
+        /* switch to OSC0 to speed up the booting */
+        pm_switch_to_osc0(&AVR32_PM, FOSC0, OSC0_STARTUP);
+    
+#ifndef USE_PLL
+        return;
+#endif
+        
+        /* For audio, ee have to use OSC1 on to generate the correct clockrate
+         * for the SSC
+         */
+#if OSC == 1
+        /* start oscillator1 */
+        pm_enable_osc1_crystal(&AVR32_PM, FOSC1);
+        pm_enable_clk1(&AVR32_PM, OSC1_STARTUP);
+#endif
+
+        /* configure pll multipliers */
+        pm_pll_setup(&AVR32_PM,
+                     0,          /* pll */
+                     PLL_MUL,    /* mul */
+                     1,          /* div */
+                     OSC,        /* osc */
+                     16);        /* lockcount */
+
+        /* set PLL operating range and divider (fpll = fvco/2)
+         * this gives PLL output = 66 MHz (62.0928 MHz for EVK1105/OSC1)
+         */
+        pm_pll_set_option(&AVR32_PM,
+                          0,  /* pll */
+                          1,  /* pll_freq */
+                          1,  /* pll_div2 */
+                          0); /* pll_wbwdisable. */
+  
+
+        /* start PLL0 and wait for the lock */
+        pm_pll_enable(&AVR32_PM, 0);
+        pm_wait_for_pll0_locked(&AVR32_PM);
+        
+        /* Set all peripheral clocks torun at master clock rate */
+        pm_cksel(&AVR32_PM,
+                 0,   /* pbadiv */
+                 0,   /* pbasel */
+                 0,   /* pbbdiv */
+                 0,   /* pbbsel */
+                 0,   /* hsbdiv */
+                 0);  /* hsbsel */ 
+        
+        /* Set one waitstate for the flash */
+        flashc_set_wait_state(1);
+        
+        /* Switch to PLL0 as the master clock */
+        pm_switch_to_clock(&AVR32_PM, AVR32_PM_MCCTRL_MCSEL_PLL0);
+
+#if OSC == 1
+        pm_configure_usb_clock();
+#endif
+}