initial "sam_e1" application for an USB E1 adapter

1 files changed, 115 insertions, 0 deletions

diff --git a/sam/applications/sam_e1/sam4sd32c_sam4s_xplained_pro/low_power_board.c b/sam/applications/sam_e1/sam4sd32c_sam4s_xplained_pro/low_power_board.c
new file mode 100644
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+/**
+ * \file
+ *
+ * \brief Board specific code for low power example.
+ *
+ * Copyright (c) 2014-2015 Atmel Corporation. All rights reserved.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * 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 Atmel may not be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * 4. This software may only be redistributed and used in connection with an
+ *    Atmel microcontroller product.
+ *
+ * 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
+ * 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.
+ *
+ * \asf_license_stop
+ *
+ */
+/*
+ * Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a>
+ */
+
+#include "board.h"
+#include "pio.h"
+#include "pio_handler.h"
+#include "pmc.h"
+#include "adc.h"
+#include "low_power_board.h"
+
+/** IRQ priority for PIO (The lower the value, the greater the priority) */
+#define IRQ_PRIOR_PIO    0
+
+/** Clock list from fast RC */
+uint32_t g_fastrc_clock_list[][3] = {
+	/* MCK,    FastRC,                  Prescaler */
+	{125000,   CKGR_MOR_MOSCRCF_4_MHz,  PMC_MCKR_PRES_CLK_32},
+	{250000,   CKGR_MOR_MOSCRCF_4_MHz,  PMC_MCKR_PRES_CLK_16},
+	{500000,   CKGR_MOR_MOSCRCF_4_MHz,  PMC_MCKR_PRES_CLK_8},
+	{1000000,  CKGR_MOR_MOSCRCF_4_MHz,  PMC_MCKR_PRES_CLK_4},
+	{2000000,  CKGR_MOR_MOSCRCF_4_MHz,  PMC_MCKR_PRES_CLK_2},
+	{4000000,  CKGR_MOR_MOSCRCF_4_MHz,  PMC_MCKR_PRES_CLK_1},
+	{8000000,  CKGR_MOR_MOSCRCF_8_MHz,  PMC_MCKR_PRES_CLK_1},
+	{12000000, CKGR_MOR_MOSCRCF_12_MHz, PMC_MCKR_PRES_CLK_1}
+};
+
+/** Clock list from PLL */
+uint32_t g_pll_clock_list[][4] = {
+	/* MCK, MUL, DIV, PRES */
+	/* MCK = 12000000 * (7+1) / 1 / 4 = 24 MHz */
+	{24000000, 7, 1, PMC_MCKR_PRES_CLK_4},
+	/* MCK = 12000000 * (7+1) / 1 / 3 = 32 MHz */
+	{32000000, 7, 1, PMC_MCKR_PRES_CLK_3},
+	/* MCK = 12000000 * (7+1) / 1 / 2 = 48 MHz */
+	{48000000, 7, 1, PMC_MCKR_PRES_CLK_2},
+	/* MCK = 12000000 * (31+1) / 3 / 2 = 64 MHz */
+	{64000000, 31, 3, PMC_MCKR_PRES_CLK_2},
+	/* MCK = 12000000 * (13+1) / 1 / 2 = 84 MHz */
+	{84000000, 13, 1, PMC_MCKR_PRES_CLK_2},
+	/* MCK = 12000000 * (24+1) / 1 / 3 = 100 MHz */
+	{100000000, 24, 1, PMC_MCKR_PRES_CLK_3},
+	/* MCK = 12000000 * (19+1) / 1 / 2 = 120 MHz */
+	{120000000, 19, 1, PMC_MCKR_PRES_CLK_2}
+};
+
+/**
+ * \brief Initialize SAM4 Xplained Pro board for low power test.
+ */
+void init_specific_board(void)
+{
+#if 0
+	/* Configure all PIOs as inputs to save power */
+	pio_set_input(PIOA, 0xFFFFFFFF, PIO_PULLUP);
+	pio_set_input(PIOB, 0xFFFFFFFF, PIO_PULLUP);
+	pio_set_input(PIOC, 0xFFFFFFFF, PIO_PULLUP);
+
+	/* Disable USB Clock */
+	pmc_disable_udpck();
+#endif
+	/* Disable PIO pull-up for PB10(USB_DDM), PB11(USB_DDP) */
+	pio_pull_up(PIOB, (0x3 << 10), 0);
+	/* Disable PIO pull-up for PC21(USB_CNX) */
+	pio_pull_up(PIOC, (0x1 << 21), 0);
+#if 0
+	/* Initialize ADC pin as ADC input mode to save power */
+	adc_enable_channel(ADC, ADC_CHANNEL_4);
+
+	/* Enable the PMC clocks of push button for wakeup */
+	pmc_enable_periph_clk(ID_PIOA);
+	pio_handler_set_priority(PIOA, PIOA_IRQn, IRQ_PRIOR_PIO);
+#endif
+}