/************************************************************************************ * configs/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 __CONFIGS_ARDUINO_DUE_INCLUDE_BOARD_H #define __CONFIGS_ARDUINO_DUE_INCLUDE_BOARD_H /************************************************************************************ * Included Files ************************************************************************************/ #include #ifndef __ASSEMBLY__ # include # ifdef CONFIG_GPIO_IRQ # include # endif #endif /************************************************************************************ * Definitions ************************************************************************************/ /* Clocking *************************************************************************/ /* After power-on reset, the SAM3X device is running on a 4MHz internal RC. These * definitions will configure clocking * * MAINOSC: Frequency = 12MHz (crysta) * PLLA: PLL Divider = 1, Multiplier = 14 to generate PLLACK = 168MHz * Master Clock (MCK): Source = PLLACK, Prescalar = 1 to generate MCK = 84MHz * CPU clock: 84MHz */ /* 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_STMODE PMC_CKGR_PLLAR_STMODE_FAST #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_MAINOSC_FREQUENCY (12000000) /* MAINOSC: 12MHz crystal on-board */ #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 24MHz 27MHz * 1 40MHz 47MHz * 2 72MHz 84MHz * 3 84MHz 96MHz */ #define BOARD_FWS 2 /* LED definitions ******************************************************************/ /* There are two user-controllable LEDs on board the Arduino Due board: * * LED GPIO * ---------------- ----- * TX Yellow LED PA21 * RX Yellow LED PC30 * * Both are pulled high and can be illuminated by driving the corresponding * GPIO output to low. */ /* LED index values for use with sam_setled() */ #define BOARD_LED_RX 0 #define BOARD_LED_TX 1 #define BOARD_NLEDS 2 /* LED bits for use with sam_setleds() */ #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 Val Meaning LED state * RX TX * ------------------- --- ----------------------- -------- --------- */ #define LED_STARTED 0 /* NuttX has been started OFF OFF */ #define LED_HEAPALLOCATE 0 /* Heap has been allocated OFF OFF */ #define LED_IRQSENABLED 0 /* Interrupts enabled OFF OFF */ #define LED_STACKCREATED 1 /* Idle stack created ON OFF */ #define LED_INIRQ 2 /* In an interrupt No change */ #define LED_SIGNAL 2 /* In a signal handler No change */ #define LED_ASSERTION 2 /* An assertion failed No change */ #define LED_PANIC 3 /* The system has crashed OFF Blinking */ #undef LED_IDLE /* MCU is is sleep mode Not used */ /* Thus if RX is statically on, NuttX has successfully booted and is, * apparently, running normmally. If TX is flashing at approximately * 2Hz, then a fatal error has been detected and the system has halted. */ /* Button definitions ***************************************************************/ /* There are no buttons on the Arduino Due board. */ /************************************************************************************ * Public Data ************************************************************************************/ #ifndef __ASSEMBLY__ #undef EXTERN #if defined(__cplusplus) #define EXTERN extern "C" extern "C" { #else #define EXTERN extern #endif /************************************************************************************ * Public Function Prototypes ************************************************************************************/ /************************************************************************************ * Name: sam_boardinitialize * * Description: * All SAM3X architectures must provide the following entry point. This entry point * is called early in the intitialization -- after all memory has been configured * and mapped but before any devices have been initialized. * ************************************************************************************/ void sam_boardinitialize(void); /************************************************************************************ * Name: sam_ledinit, sam_setled, and sam_setleds * * Description: * If CONFIG_ARCH_LEDS is defined, then NuttX will control the on-board LEDs. If * CONFIG_ARCH_LEDS is not defined, then the following interfacesare available to * control the LEDs from user applications. * ************************************************************************************/ #ifndef CONFIG_ARCH_LEDS void sam_ledinit(void); void sam_setled(int led, bool ledon); void sam_setleds(uint8_t ledset); #endif #undef EXTERN #if defined(__cplusplus) } #endif #endif /* __ASSEMBLY__ */ #endif /* __CONFIGS_ARDUINO_DUE_INCLUDE_BOARD_H */