/**************************************************************************** * boards/arm/sam34/arduino-due/include/board.h * * Copyright (C) 2013 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * 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. Neither the name NuttX nor the names of its contributors may be * used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "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 DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS 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. * ****************************************************************************/ #ifndef __BOARDS_ARM_SAM34_ARDUINO_DUE_INCLUDE_BOARD_H #define __BOARDS_ARM_SAM34_ARDUINO_DUE_INCLUDE_BOARD_H /**************************************************************************** * Included Files ****************************************************************************/ #include #ifndef __ASSEMBLY__ # include # include # ifdef CONFIG_SAM34_GPIO_IRQ # include # endif #endif /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /* Clocking *****************************************************************/ /* After power-on reset, the SAM3X device is running on a 4MHz internal RC. * These definitions will configure clocking * * MAINOSC: Frequency = 12MHz (crystal) * PLLA: PLL Divider = 1, Multiplier = 14 to generate PLLACK = 168MHz * Master Clock (MCK): Source = PLLACK, Prescalar = 1 to generate MCK = 84MHz * CPU clock: 84MHz */ #define BOARD_32KOSC_FREQUENCY (32768) #define BOARD_SCLK_FREQUENCY (BOARD_32KOSC_FREQUENCY) #define BOARD_MAINOSC_FREQUENCY (12000000) /* MAINOSC: 12MHz crystal on-board */ /* Main oscillator register settings. * * The start up time should be should be: * Start Up Time = 8 * MOSCXTST / SLCK = 56 Slow Clock Cycles. */ #define BOARD_CKGR_MOR_MOSCXTST (62 << PMC_CKGR_MOR_MOSCXTST_SHIFT) /* Start-up Time */ /* PLLA configuration. * * Divider = 1 * Multipler = 14 */ #define BOARD_CKGR_PLLAR_MUL (13 << PMC_CKGR_PLLAR_MUL_SHIFT) #define BOARD_CKGR_PLLAR_COUNT (63 << PMC_CKGR_PLLAR_COUNT_SHIFT) #define BOARD_CKGR_PLLAR_DIV PMC_CKGR_PLLAR_DIV_BYPASS /* PMC master clock register settings. * * Source = PLLA * Divider = 2 */ #define BOARD_PMC_MCKR_CSS PMC_MCKR_CSS_PLLA #define BOARD_PMC_MCKR_PRES PMC_MCKR_PRES_DIV2 /* USB UTMI PLL start-up time */ #define BOARD_CKGR_UCKR_UPLLCOUNT (3 << PMC_CKGR_UCKR_UPLLCOUNT_SHIFT) /* Resulting frequencies */ #define BOARD_PLLA_FREQUENCY (168000000) /* PLLACK: 14 * 12Mhz / 1 */ #define BOARD_MCK_FREQUENCY (84000000) /* MCK: PLLACK / 2 */ #define BOARD_CPU_FREQUENCY (84000000) /* CPU: MCK */ /* HSMCI clocking * * Multimedia Card Interface clock (MCCK or MCI_CK) is Master Clock * (MCK) divided by (2*(CLKDIV+1)). * * MCI_SPEED = MCCK / (2*(CLKDIV+1)) * CLKDIV = MCCK / MCI_SPEED / 2 - 1 * * Where CLKDIV has a range of 0-255. */ /* MCK = 84MHz, CLKDIV = 104, * MCI_SPEED = 84MHz / 2 * (104+1) = 400 KHz */ #define HSMCI_INIT_CLKDIV (104 << HSMCI_MR_CLKDIV_SHIFT) /* MCK = 84MHz, CLKDIV = 2, MCI_SPEED = 84MHz / 2 * (2+1) = 14 MHz */ #define HSMCI_MMCXFR_CLKDIV (1 << HSMCI_MR_CLKDIV_SHIFT) /* MCK = 84MHz, CLKDIV = 1, MCI_SPEED = 84MHz / 2 * (1+1) = 21 MHz */ #define HSMCI_SDXFR_CLKDIV (1 << HSMCI_MR_CLKDIV_SHIFT) #define HSMCI_SDWIDEXFR_CLKDIV HSMCI_SDXFR_CLKDIV /* FLASH wait states * * FWS MAX FREQUENCY * 1.62V 1.8V * --- ----- ------ * 0 17MHz 19MHz * 1 45MHz 50MHz * 2 58MHz 64MHz * 3 70MHz 80MHz * 4 78MHz 90MHz */ #define BOARD_FWS 4 /* LED definitions **********************************************************/ /* There are three user-controllable LEDs on board the Arduino Due board: * * LED GPIO * ---------------- ----- * L Amber LED PB27 * TX Yellow LED PA21 * RX Yellow LED PC30 * * LED L is connected to ground and can be illuminated by driving the PB27 * output high. The TX and RX LEDs are pulled high and can be illuminated by * driving the corresponding * GPIO output to low. */ /* LED index values for use with board_userled() */ #define BOARD_LED_L 0 #define BOARD_LED_RX 1 #define BOARD_LED_TX 2 #define BOARD_NLEDS 3 /* LED bits for use with board_userled_all() */ #define BOARD_LED_L_BIT (1 << BOARD_LED_L) #define BOARD_LED_RX_BIT (1 << BOARD_LED_RX) #define BOARD_LED_TX_BIT (1 << BOARD_LED_TX) /* These LEDs are not used by the board port unless CONFIG_ARCH_LEDS is * defined. In that case, the usage by the board port is defined in * include/board.h and src/sam_leds.c. The LEDs are used to encode OS-related * events as follows: * * SYMBOL MEANING LED STATE * L TX RX * ----------------------- -------------------------- -------- -------- -------- */ #define LED_STARTED 0 /* NuttX has been started OFF OFF OFF */ #define LED_HEAPALLOCATE 0 /* Heap has been allocated OFF OFF OFF */ #define LED_IRQSENABLED 0 /* Interrupts enabled OFF OFF OFF */ #define LED_STACKCREATED 1 /* Idle stack created ON OFF OFF */ #define LED_INIRQ 2 /* In an interrupt N/C GLOW OFF */ #define LED_SIGNAL 2 /* In a signal handler N/C GLOW OFF */ #define LED_ASSERTION 2 /* An assertion failed N/C GLOW OFF */ #define LED_PANIC 3 /* The system has crashed N/C N/C Blinking */ #define LED_PANIC 3 /* MCU is is sleep mode ------ Not used -------- */ /* Thus if LED L is statically on, NuttX has successfully booted and is, * apparently, running normmally. If LED RX is glowing, then NuttX is * handling interrupts (and also signals and assertions). If TX is flashing * at approximately 2Hz, then a fatal error has been detected and the system */ /* Button definitions *******************************************************/ /* There are no buttons on the Arduino Due board. */ /* GPIO pin configurations **************************************************/ #if 1 /* #ifdef CONFIG_ARDUINO_DUE_REV3 works with REV2 as well */ /* This port was performed on the Arduino Due Rev 2 board. * A NuttX user reported issues with the serial port on his Aduino Due Rev 3 * board. * That problem was resolved as follows: * * "... The issue was in my hardware. I found the difference between Arduino * Due shematics (revision R2) and actual PCB layout of my Arduino (revision * R3). On a schematics which I download from arduino.cc was shown that 2nd * pin of IC10 is connected to the ground, but on my Arduino the 2nd pin * of IC10 was connected to its 1st pin instead of ground and in my case * IC10 works in open-drain mode, but RX0 pin on SAM3x doesn't have pull-up * and thus TX signal from AtMega16U2 can't reach the SAM3x input pin, on * this pin always '0'. * * "My solution is to enable internal pull-up in SAM3x. ... * Now shell console on UART0 (via USB programming connector) of Arduino Due * Due works as expected." */ # undef GPIO_UART0_RXD # define GPIO_UART0_RXD (GPIO_PERIPHA | GPIO_CFG_DEFAULT | GPIO_PORT_PIOA | \ GPIO_PIN8 | GPIO_CFG_PULLUP) #endif #endif /* __BOARDS_ARM_SAM34_ARDUINO_DUE_INCLUDE_BOARD_H */