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Diffstat (limited to 'utility/clock.c')
| -rw-r--r-- | utility/clock.c | 289 |
1 files changed, 289 insertions, 0 deletions
diff --git a/utility/clock.c b/utility/clock.c new file mode 100644 index 0000000..830cb61 --- /dev/null +++ b/utility/clock.c @@ -0,0 +1,289 @@ +/* ----------------------------------------------------------------------------
+ * ATMEL Microcontroller Software Support
+ * ----------------------------------------------------------------------------
+ * Copyright (c) 2008, Atmel Corporation
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the disclaimer below.
+ *
+ * Atmel's name may not be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
+ * 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.
+ * ----------------------------------------------------------------------------
+ */
+
+//------------------------------------------------------------------------------
+// Headers
+//------------------------------------------------------------------------------
+
+#include "clock.h"
+#include <board.h>
+#include <utility/trace.h>
+
+//------------------------------------------------------------------------------
+// Internal types
+//------------------------------------------------------------------------------
+int currentConfig = 0; // 0 have to be the default configuration
+
+//------------------------------------------------------------------------------
+/// Describes a possible clock configuration (processor clock & master clock),
+/// including the necessary register values.
+//------------------------------------------------------------------------------
+struct ClockConfiguration {
+
+ /// Processor clock frequency (in MHz).
+ unsigned short pck;
+ /// Master clock frequency (in MHz).
+ unsigned short mck;
+ /// CKGR_PLL reqister value.
+ unsigned int pllr;
+ /// PMC_MCKR register value.
+ unsigned int mckr;
+};
+
+//------------------------------------------------------------------------------
+// Internal variables
+//------------------------------------------------------------------------------
+
+// Clock configurations for the AT91SAM9263-EK
+#if defined(at91sam9263)
+
+#define AT91C_CKGR_PLLR AT91C_CKGR_PLLAR
+#define AT91C_PMC_LOCK AT91C_PMC_LOCKA
+
+static const struct ClockConfiguration clockConfigurations[] = {
+ // PCK = 200 MHz, MCK = 100 MHz
+ {200, 100, 0x206DBF09, 0x00000102},
+ // PCK = 240 MHz, MCK = 120 MHz
+ {240, 120, 0x202BC003, 0x00000102},
+ // PCK = 120 MHz, MCK = 120 MHz
+ {120, 120, 0x20156003, 0x00000002},
+ // PCK = 96 MHz, MCK = 48 MHz
+ {96, 48, 0x2057400F, 0x00000102},
+ // PCK = 48 MHz, MCK = 48 MHz
+ {48, 48, 0x2057400F, 0x00000006}
+};
+
+// Clock configurations for the AT91SAM9G20-EK
+#elif defined(at91sam9g20)
+
+#define AT91C_CKGR_PLLR AT91C_CKGR_PLLAR
+#define AT91C_PMC_LOCK AT91C_PMC_LOCKA
+
+static const struct ClockConfiguration clockConfigurations[] = {
+
+ // PCK = 400 MHz, MCK = 133 MHz
+ {400, 133, 0x202A0101, 0x00001302},
+ // PCK = 200 MHz, MCK = 100 MHz
+ {200, 100, 0x202A3F01, 0x0000010A},
+ // PCK = 96 MHz, MCK = 48 MHz
+ {96, 48, 0x207C3F03, 0x0000010E},
+ // PCK = 48 MHz, MCK = 48 MHz
+ {48, 48, 0x207C3F03, 0x00000012}
+};
+
+// Clock configurations for the AT91SAM9XE-EK, AT91SAM9261-EK
+#elif defined(at91sam9xe128) || \
+ defined(at91sam9xe256) || \
+ defined(at91sam9xe512) || \
+ defined(at91sam9261)
+
+#define AT91C_CKGR_PLLR AT91C_CKGR_PLLAR
+#define AT91C_PMC_LOCK AT91C_PMC_LOCKA
+
+static const struct ClockConfiguration clockConfigurations[] = {
+
+ // PCK = 200 MHz, MCK = 100 MHz
+ {200, 100, 0x208CBF0D, 0x00000102},
+ // PCK = 100 MHz, MCK = 100 MHz
+ {100, 100, 0x20273F07, 0x00000002},
+ // PCK = 96 MHz, MCK = 48 MHz
+ {96, 48, 0x20483F0E, 0x00000102},
+ // PCK = 48 MHz, MCK = 48 MHz
+ {48, 48, 0x20483F0E, 0x00000006}
+};
+
+// Clock configurations for the AT91SAM9RL64-EK, AT91CAP9-DK, AT91CAP9-STK
+#elif defined(at91sam9rl64) || \
+ defined(at91cap9)
+
+#define AT91C_CKGR_PLLR AT91C_CKGR_PLLAR
+#define AT91C_PMC_LOCK AT91C_PMC_LOCKA
+
+static const struct ClockConfiguration clockConfigurations[] = {
+
+ // PCK = 200 MHz, MCK = 100 MHz
+ {200, 100, 0x2031BF03, 0x00000102},
+ // PCK = 100 MHz, MCK = 100 MHz
+ {100, 100, 0x20183F03, 0x00000002},
+ // PCK = 96 MHz, MCK = 48 MHz
+ {96, 48, 0x20073F01, 0x00000102},
+ // PCK = 48 MHz, MCK = 48 MHz
+ {48, 48, 0x20073F01, 0x00000006}
+};
+
+// Clock configuration for the AT91SAM7X-EK, AT91SAM7S-EK, AT91SAM7SE-EK
+#elif defined(at91sam7x128) || defined(at91sam7x256) || defined(at91sam7x512) \
+ || defined(at91sam7xc128) || defined(at91sam7xc256) || defined(at91sam7xc512) \
+ || defined(at91sam7s16) || defined(at91sam7s161) || defined(at91sam7s32) \
+ || defined(at91sam7s321) || defined(at91sam7s64) || defined(at91sam7s128) \
+ || defined(at91sam7s256) || defined(at91sam7s512) || defined(at91sam7se32) \
+ || defined(at91sam7se256) || defined(at91sam7se512)
+
+static const struct ClockConfiguration clockConfigurations[] = {
+
+ // PCK = 55 MHz, MCK = 55 MHz
+ {55, 55, 0x006A3F12, 0x00000007},
+ // PCK = 48 MHz, MCK = 48 MHz
+ {48, 48, 0x00483F0E, 0x00000007},
+};
+
+// Clock configuration for the AT91SAM7A3
+#elif defined(at91sam7a3)
+
+static const struct ClockConfiguration clockConfigurations[] = {
+
+ // PCK = 60 MHz, MCK = 60 MHz
+ {60, 60, 0x000C3F02, 0x00000007},
+ // PCK = 48 MHz, MCK = 48 MHz
+ {48, 48, 0x00483F0E, 0x00000007}
+};
+
+// Clock configurations for the AT91SAM9XE-EK, AT91SAM9261-EK
+ #elif defined(at91sam9g10)
+
+#define AT91C_CKGR_PLLR AT91C_CKGR_PLLAR
+#define AT91C_PMC_LOCK AT91C_PMC_LOCKA
+
+static const struct ClockConfiguration clockConfigurations[] = {
+ // PCK = 266 MHz, MCK = 133 MHz
+ {266, 133, 0x2064BF07, 0x00000102},
+ // PCK = 100 MHz, MCK = 100 MHz
+ {100, 100, 0x20273F07, 0x00000002},
+ // PCK = 96 MHz, MCK = 48 MHz
+ {96, 48, 0x20483F0E, 0x00000102},
+ // PCK = 48 MHz, MCK = 48 MHz
+ {48, 48, 0x20483F0E, 0x00000006}
+ };
+
+// Clock configuration for the AT91SAM3U
+#elif defined(at91sam3u)
+
+static const struct ClockConfiguration clockConfigurations[] = {
+
+ // PCK = 48 MHz, MCK = 48 MHz (default)
+ {48, 48, 0x20073f01, 0x00000012},
+ // PCK = 96 MHz, MCK = 96 MHz
+ {96, 96, 0x20073f01, 0x00000002},
+ // PCK = 24 MHz, MCK = 24 MHz
+ {24, 24, 0x20073f02, 0x00000012}
+};
+
+// No clock configuration
+#else
+ #error No clock configuration for this board.
+#endif
+
+/// Number of available clock configurations
+#define NB_CLOCK_CONFIGURATION (sizeof(clockConfigurations)/sizeof(clockConfigurations[0]))
+
+//------------------------------------------------------------------------------
+// Global Functions
+//------------------------------------------------------------------------------
+
+//------------------------------------------------------------------------------
+/// Sets the specified clock configuration.
+/// \param configuration Index of the configuration to set.
+//------------------------------------------------------------------------------
+void CLOCK_SetConfig(unsigned char configuration)
+{
+ TRACE_DEBUG("Setting clock configuration #%d ... ", configuration);
+ currentConfig = configuration;
+
+ // Switch to main oscillator in two operations
+ AT91C_BASE_PMC->PMC_MCKR = (AT91C_BASE_PMC->PMC_MCKR & ~AT91C_PMC_CSS) | AT91C_PMC_CSS_MAIN_CLK;
+ while ((AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY) == 0);
+
+ // Configure PLL
+ *AT91C_CKGR_PLLAR = clockConfigurations[configuration].pllr;
+ while ((AT91C_BASE_PMC->PMC_SR & AT91C_PMC_LOCKA) == 0);
+
+ // Configure master clock in two operations
+ AT91C_BASE_PMC->PMC_MCKR = (clockConfigurations[configuration].mckr & ~AT91C_PMC_CSS) | AT91C_PMC_CSS_MAIN_CLK;
+ while ((AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY) == 0);
+ AT91C_BASE_PMC->PMC_MCKR = clockConfigurations[configuration].mckr;
+ while ((AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY) == 0);
+
+ // DBGU reconfiguration
+ DBGU_Configure(DBGU_STANDARD, 115200, clockConfigurations[configuration].mck*1000000);
+ TRACE_DEBUG("done.\n\r");
+}
+
+//------------------------------------------------------------------------------
+/// Display the user menu on the DBGU.
+//------------------------------------------------------------------------------
+void CLOCK_DisplayMenu(void)
+{
+ unsigned int i;
+
+ printf("\n\rMenu Clock configuration:\n\r");
+ for (i = 0; i < NB_CLOCK_CONFIGURATION; i++) {
+
+ printf(" %d: Set PCK = %3d MHz, MCK = %3d MHz %s\n\r",
+ i,
+ clockConfigurations[i].pck,
+ clockConfigurations[i].mck,
+ (currentConfig==i)?"(curr)":"");
+ }
+}
+
+//------------------------------------------------------------------------------
+/// Get the current MCK
+//------------------------------------------------------------------------------
+unsigned short CLOCK_GetCurrMCK(void)
+{
+ return clockConfigurations[currentConfig].mck;
+}
+
+//------------------------------------------------------------------------------
+/// Get the current PCK
+//------------------------------------------------------------------------------
+unsigned short CLOCK_GetCurrPCK(void)
+{
+ return clockConfigurations[currentConfig].pck;
+}
+
+//------------------------------------------------------------------------------
+/// Change clock configuration.
+//------------------------------------------------------------------------------
+void CLOCK_UserChangeConfig(void)
+{
+ unsigned char key = 0;
+
+ while (1)
+ {
+ CLOCK_DisplayMenu();
+ key = DBGU_GetChar();
+
+ if ((key >= '0') && (key <= ('0' + NB_CLOCK_CONFIGURATION - 1)))
+ {
+ CLOCK_SetConfig(key - '0');
+ break;
+ }
+ }
+}
\ No newline at end of file |