/************************************************************************************ * configs/samd20-xplained/include/board.h * * Copyright (C) 2014 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_SAMD20_XPLAINED_INCLUDE_BOARD_H #define __CONFIGS_SAMD20_XPLAINED_INCLUDE_BOARD_H /************************************************************************************ * Included Files ************************************************************************************/ #include #ifndef __ASSEMBLY__ # include # ifdef CONFIG_GPIO_IRQ # include # endif #endif /************************************************************************************ * Definitions ************************************************************************************/ /* Clocking *************************************************************************/ /* Nominal frequencies of on-chip RC oscillators. These are *not* configurable * but appear here for use in frequency calculations. NOTE: These frequencies * may vary with temperature changes. */ #define BOARD_OSC32K_FREQUENCY 32768 /* 32.768kHz internal oscillator */ #define BOARD_OSCULP32K_FREQUENCY 32000 /* 32kHz ultra-low-power internal oscillator */ #define BOARD_OSC8M_FREQUENCY 8000000 /* 8MHz high-accuracy internal oscillator */ #define BOARD_DFLL48M_FREQUENCY 48000000 /* 48MHz Digital Frequency Locked Loop */ /* The SAMD20 Xplained Pro has one on-board crystal: * * XC101 32.768KHz XOSC32 */ /* XOSC Configuration -- Not available */ #undef BOARD_XOSC_FREQUENCY /* XOSC32 Configuration */ #define BOARD_XOSC32_FREQUENCY 32768 /* 32.768KHz XTAL */ #define BOARD_XOSC32_STARTUP_US 6100 /* The source of the main clock is always GLCK_MAIN. Also called GCLKGEN[0], this is * the clock feeding the Power Manager. The Power Manager, in turn, generates main * clock which is divided down to produce the CPU, AHB, and APB clocks. * * The main clock is initially OSC8M divided by 8. But will be reconfigured here to * be DFLL48M. * * Select the OSC8M as the source of the GLCK_MAIN. Options (define one): * * BOARD_GLCK_MAIN_SRC_XOSC - XOSC oscillator output * BOARD_GLCK_MAIN_SRC_GCLKIN - Generator input pad * BOARD_GLCK_MAIN_SRC_GCLKGEN1 - Generic clock generator 1 output * BOARD_GLCK_MAIN_SRC_OSCULP32K - OSCULP32K oscillator output * BOARD_GLCK_MAIN_SRC_OSC32K - OSC32K oscillator output * BOARD_GLCK_MAIN_SRC_XOSC32K - XOSC32K oscillator output * BOARD_GLCK_MAIN_SRC_OSC8M - OSC8M oscillator output * BOARD_GLCK_MAIN_SRC_DFLL48M - DFLL48M output * * Fglckmain = Frefclk / Divider */ #define BOARD_GLCK_MAIN_SRC_OSC8M 1 #define BOARD_GLCK_MAIN_DIVIDER 1 #define BOARD_GLCK_MAIN_FREQUENCY (BOARD_OSC8M_FREQUENCY / BOARD_GLCK_MAIN_DIVIDER) /* Digital Frequency Locked Loop configuration. In closed-loop mode, the * DFLL output frequency (Fdfll) is given by: * * Fdfll = DFLLmul * Frefclk * = (48000000/32768) * 32768 = 48MHz * * Where the reference clock is always the Generic Clock Channel 0 output. * * NOTE: Nothing must be defined if the DFPLL is not used */ #define BOARD_DFLL48M_TARGET 48000000 #define BOARD_DFLL48M_MUL (BOARD_DFLL0_TARGET / BOARD_GCK_MAIN_FREQUENCY) #define BOARD_DFLL48M_FREQUENCY (BOARD_DFLL48M_MUL * BOARD_GCK_MAIN_FREQUENCY) /* System clock dividers: Fbus = Fmck >> BUSshift */ #define BOARD_CPU_SHIFT 0 /* Fcpu = Fmck = 48MHz */ #define BOARD_PBA_SHIFT 0 /* Fpba = Fmck = 48MHz */ #define BOARD_PBB_SHIFT 0 /* Fpbb = Fmck = 48MHz */ #define BOARD_PBC_SHIFT 0 /* Fpbc = Fmck = 48MHz */ #define BOARD_PBD_SHIFT 0 /* Fpbd = Fmck = 48MHz */ /* Resulting frequencies */ #define BOARD_MCK_FREQUENCY (BOARD_GLCK_MAIN_FREQUENCY) #define BOARD_CPU_FREQUENCY (BOARD_MCK_FREQUENCY >> BOARD_CPU_SHIFT) #define BOARD_PBA_FREQUENCY (BOARD_MCK_FREQUENCY >> BOARD_PBA_SHIFT) #define BOARD_PBB_FREQUENCY (BOARD_MCK_FREQUENCY >> BOARD_PBB_SHIFT) #define BOARD_PBC_FREQUENCY (BOARD_MCK_FREQUENCY >> BOARD_PBC_SHIFT) #define BOARD_PBD_FREQUENCY (BOARD_MCK_FREQUENCY >> BOARD_PBD_SHIFT) /* LED definitions ******************************************************************/ /* There are three LEDs on board the SAMD20 Xplained Pro board: The EDBG * controls two of the LEDs, a power LED and a status LED. There is only * one user controllable LED, a yellow LED labelled STATUS near the SAMD20 USB * connector. * * This LED is controlled by PC07 and the LED can be activated by driving the * PA14 to GND. */ /* LED index values for use with sam_setled() */ #define BOARD_STATUS_LED 0 #define BOARD_NLEDS 1 /* LED bits for use with sam_setleds() */ #define BOARD_STATUS LED_BIT (1 << BOARD_STATUS_LED) /* When CONFIG_ARCH_LEDS is defined in the NuttX configuration, NuttX will * control the LED as defined below. Thus if the LED is statically on, NuttX has * successfully booted and is, apparently, running normally. If the LED is * flashing at approximately 2Hz, then a fatal error has been detected and the * system has halted. */ #define LED_STARTED 0 /* STATUS LED=OFF */ #define LED_HEAPALLOCATE 0 /* STATUS LED=OFF */ #define LED_IRQSENABLED 0 /* STATUS LED=OFF */ #define LED_STACKCREATED 1 /* STATUS LED=ON */ #define LED_INIRQ 2 /* STATUS LED=no change */ #define LED_SIGNAL 2 /* STATUS LED=no change */ #define LED_ASSERTION 2 /* STATUS LED=no change */ #define LED_PANIC 3 /* STATUS LED=flashing */ /* Button definitions ***************************************************************/ /* Mechanical buttons: * * The SAMD20 Xplained Pro contains two mechanical buttons. One button is the * RESET button connected to the SAMD20 reset line and the other is a generic user * configurable button. When a button is pressed it will drive the I/O line to GND. * * PA15 SW0 */ /* The SAMD20 Xplained Pro supports one button: */ #define BUTTON_SW0 0 #define NUM_BUTTONS 1 #define BUTTON_SW0_BIT (1 << BUTTON_SW0) /************************************************************************************ * 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 SAM3U architectures must provide the following entry point. This entry point * is called early in the initialization -- 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 interfaces are 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_SAMD20_XPLAINED_INCLUDE_BOARD_H */