From 01820061b279cd9d9e62fec2084f23cbfc1023c7 Mon Sep 17 00:00:00 2001 From: Jeremy Herbert Date: Mon, 23 Mar 2020 07:04:43 -0700 Subject: [PATCH] add support for seeeduino xiao --- docs/boards.md | 1 + hw/bsp/seeeduino_xiao/board.mk | 45 +++++++ hw/bsp/seeeduino_xiao/samd21g18a_flash.ld | 147 ++++++++++++++++++++++ hw/bsp/seeeduino_xiao/seeeduino_xiao.c | 142 +++++++++++++++++++++ 4 files changed, 335 insertions(+) create mode 100644 hw/bsp/seeeduino_xiao/board.mk create mode 100644 hw/bsp/seeeduino_xiao/samd21g18a_flash.ld create mode 100644 hw/bsp/seeeduino_xiao/seeeduino_xiao.c diff --git a/docs/boards.md b/docs/boards.md index 9667f6944..abf914aaa 100644 --- a/docs/boards.md +++ b/docs/boards.md @@ -18,6 +18,7 @@ This code base already had supported for a handful of following boards (sorted a - [Adafruit ItsyBitsy M4 Express](https://www.adafruit.com/product/3800) - [Adafruit Metro M0 Express](https://www.adafruit.com/product/3505) - [Adafruit Metro M4 Express](https://www.adafruit.com/product/3382) +- [Seeeduino Xiao](https://www.seeedstudio.com/Seeeduino-XIAO-Arduino-Microcontroller-SAMD21-Cortex-M0+-p-4426.html) ### Nordic nRF5x diff --git a/hw/bsp/seeeduino_xiao/board.mk b/hw/bsp/seeeduino_xiao/board.mk new file mode 100644 index 000000000..d762c4eca --- /dev/null +++ b/hw/bsp/seeeduino_xiao/board.mk @@ -0,0 +1,45 @@ +CFLAGS += \ + -flto \ + -mthumb \ + -mabi=aapcs-linux \ + -mcpu=cortex-m0plus \ + -nostdlib -nostartfiles \ + -D__SAMD21G18A__ \ + -DCONF_DFLL_OVERWRITE_CALIBRATION=0 \ + -DCFG_TUSB_MCU=OPT_MCU_SAMD21 + +# All source paths should be relative to the top level. +LD_FILE = hw/bsp/$(BOARD)/samd21g18a_flash.ld + +SRC_C += \ + hw/mcu/microchip/samd/asf4/samd21/gcc/gcc/startup_samd21.c \ + hw/mcu/microchip/samd/asf4/samd21/gcc/system_samd21.c \ + hw/mcu/microchip/samd/asf4/samd21/hpl/gclk/hpl_gclk.c \ + hw/mcu/microchip/samd/asf4/samd21/hpl/pm/hpl_pm.c \ + hw/mcu/microchip/samd/asf4/samd21/hpl/sysctrl/hpl_sysctrl.c \ + hw/mcu/microchip/samd/asf4/samd21/hal/src/hal_atomic.c + +INC += \ + $(TOP)/hw/mcu/microchip/samd/asf4/samd21/ \ + $(TOP)/hw/mcu/microchip/samd/asf4/samd21/config \ + $(TOP)/hw/mcu/microchip/samd/asf4/samd21/include \ + $(TOP)/hw/mcu/microchip/samd/asf4/samd21/hal/include \ + $(TOP)/hw/mcu/microchip/samd/asf4/samd21/hal/utils/include \ + $(TOP)/hw/mcu/microchip/samd/asf4/samd21/hpl/pm/ \ + $(TOP)/hw/mcu/microchip/samd/asf4/samd21/hpl/port \ + $(TOP)/hw/mcu/microchip/samd/asf4/samd21/hri \ + $(TOP)/hw/mcu/microchip/samd/asf4/samd21/CMSIS/Include + +# For TinyUSB port source +VENDOR = microchip +CHIP_FAMILY = samd + +# For freeRTOS port source +FREERTOS_PORT = ARM_CM0 + +# For flash-jlink target +JLINK_DEVICE = ATSAMD21G18 +JLINK_IF = swd + +# flash using jlink +flash: flash-jlink diff --git a/hw/bsp/seeeduino_xiao/samd21g18a_flash.ld b/hw/bsp/seeeduino_xiao/samd21g18a_flash.ld new file mode 100644 index 000000000..bae38a881 --- /dev/null +++ b/hw/bsp/seeeduino_xiao/samd21g18a_flash.ld @@ -0,0 +1,147 @@ +/** + * \file + * + * \brief Linker script for running in internal FLASH on the SAMD21G18A + * + * Copyright (c) 2017 Microchip Technology Inc. + * + * \asf_license_start + * + * \page License + * + * SPDX-License-Identifier: Apache-2.0 + * + * Licensed under the Apache License, Version 2.0 (the "License"); you may + * not use this file except in compliance with the License. + * You may obtain a copy of the Licence at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an AS IS BASIS, WITHOUT + * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + * \asf_license_stop + * + */ + + +OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm") +OUTPUT_ARCH(arm) +SEARCH_DIR(.) + +/* Memory Spaces Definitions */ +MEMORY +{ + rom (rx) : ORIGIN = 0x00000000 + 8K, LENGTH = 0x00040000 - 8K /* 8K offset to preserve bootloader */ + ram (rwx) : ORIGIN = 0x20000000, LENGTH = 0x00008000 +} + +/* The stack size used by the application. NOTE: you need to adjust according to your application. */ +STACK_SIZE = DEFINED(STACK_SIZE) ? STACK_SIZE : DEFINED(__stack_size__) ? __stack_size__ : 0x2000; + +ENTRY(Reset_Handler) + +/* Section Definitions */ +SECTIONS +{ + .text : + { + . = ALIGN(4); + _sfixed = .; + KEEP(*(.vectors .vectors.*)) + *(.text*) + *(.gnu.linkonce.t.*) + *(.glue_7t) *(.glue_7) + *(.rodata .rodata* .gnu.linkonce.r.*) + *(.ARM.extab* .gnu.linkonce.armextab.*) + + /* Support C constructors, and C destructors in both user code + and the C library. This also provides support for C++ code. */ + . = ALIGN(4); + KEEP(*(.init)) + . = ALIGN(4); + __preinit_array_start = .; + KEEP (*(.preinit_array)) + __preinit_array_end = .; + + . = ALIGN(4); + __init_array_start = .; + KEEP (*(SORT(.init_array.*))) + KEEP (*(.init_array)) + __init_array_end = .; + + . = ALIGN(4); + KEEP (*crtbegin.o(.ctors)) + KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors)) + KEEP (*(SORT(.ctors.*))) + KEEP (*crtend.o(.ctors)) + + . = ALIGN(4); + KEEP(*(.fini)) + + . = ALIGN(4); + __fini_array_start = .; + KEEP (*(.fini_array)) + KEEP (*(SORT(.fini_array.*))) + __fini_array_end = .; + + KEEP (*crtbegin.o(.dtors)) + KEEP (*(EXCLUDE_FILE (*crtend.o) .dtors)) + KEEP (*(SORT(.dtors.*))) + KEEP (*crtend.o(.dtors)) + + . = ALIGN(4); + _efixed = .; /* End of text section */ + } > rom + + /* .ARM.exidx is sorted, so has to go in its own output section. */ + PROVIDE_HIDDEN (__exidx_start = .); + .ARM.exidx : + { + *(.ARM.exidx* .gnu.linkonce.armexidx.*) + } > rom + PROVIDE_HIDDEN (__exidx_end = .); + + . = ALIGN(4); + _etext = .; + + .relocate : AT (_etext) + { + . = ALIGN(4); + _srelocate = .; + *(.ramfunc .ramfunc.*); + *(.data .data.*); + . = ALIGN(4); + _erelocate = .; + } > ram + + /* .bss section which is used for uninitialized data */ + .bss (NOLOAD) : + { + . = ALIGN(4); + _sbss = . ; + _szero = .; + *(.bss .bss.*) + *(COMMON) + . = ALIGN(4); + _ebss = . ; + _ezero = .; + end = .; + } > ram + + /* stack section */ + .stack (NOLOAD): + { + . = ALIGN(8); + _sstack = .; + . = . + STACK_SIZE; + . = ALIGN(8); + _estack = .; + } > ram + + . = ALIGN(4); + _end = . ; +} diff --git a/hw/bsp/seeeduino_xiao/seeeduino_xiao.c b/hw/bsp/seeeduino_xiao/seeeduino_xiao.c new file mode 100644 index 000000000..a3602d66e --- /dev/null +++ b/hw/bsp/seeeduino_xiao/seeeduino_xiao.c @@ -0,0 +1,142 @@ +/* + * The MIT License (MIT) + * + * Copyright (c) 2019 Ha Thach (tinyusb.org) + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + * + * This file is part of the TinyUSB stack. + */ + +#include "sam.h" +#include "bsp/board.h" + +#include "hal/include/hal_gpio.h" +#include "hal/include/hal_init.h" +#include "hri/hri_nvmctrl_d21.h" + +#include "hpl/gclk/hpl_gclk_base.h" +#include "hpl_pm_config.h" +#include "hpl/pm/hpl_pm_base.h" + +//--------------------------------------------------------------------+ +// MACRO TYPEDEF CONSTANT ENUM DECLARATION +//--------------------------------------------------------------------+ +#define LED_PIN 26 +#define BUTTON_PIN 9 // PA4, pin D1 on seeed pinout + +/* Referenced GCLKs, should be initialized firstly */ +#define _GCLK_INIT_1ST (1 << 0 | 1 << 1) + +/* Not referenced GCLKs, initialized last */ +#define _GCLK_INIT_LAST (~_GCLK_INIT_1ST) + +void board_init(void) +{ + // Clock init ( follow hpl_init.c ) + hri_nvmctrl_set_CTRLB_RWS_bf(NVMCTRL, 2); + + _pm_init(); + _sysctrl_init_sources(); +#if _GCLK_INIT_1ST + _gclk_init_generators_by_fref(_GCLK_INIT_1ST); +#endif + _sysctrl_init_referenced_generators(); + _gclk_init_generators_by_fref(_GCLK_INIT_LAST); + + // Update SystemCoreClock since it is hard coded with asf4 and not correct + // Init 1ms tick timer (samd SystemCoreClock may not correct) + SystemCoreClock = CONF_CPU_FREQUENCY; + SysTick_Config(CONF_CPU_FREQUENCY / 1000); + + // Led init + gpio_set_pin_direction(LED_PIN, GPIO_DIRECTION_OUT); + gpio_set_pin_level(LED_PIN, 0); + + // Button init + gpio_set_pin_direction(BUTTON_PIN, GPIO_DIRECTION_IN); + gpio_set_pin_pull_mode(BUTTON_PIN, GPIO_PULL_UP); + +#if CFG_TUSB_OS == OPT_OS_FREERTOS + // If freeRTOS is used, IRQ priority is limit by max syscall ( smaller is higher ) + NVIC_SetPriority(USB_IRQn, configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY); +#endif + + /* USB Clock init + * The USB module requires a GCLK_USB of 48 MHz ~ 0.25% clock + * for low speed and full speed operation. */ + _pm_enable_bus_clock(PM_BUS_APBB, USB); + _pm_enable_bus_clock(PM_BUS_AHB, USB); + _gclk_enable_channel(USB_GCLK_ID, GCLK_CLKCTRL_GEN_GCLK0_Val); + + // USB Pin Init + gpio_set_pin_direction(PIN_PA24, GPIO_DIRECTION_OUT); + gpio_set_pin_level(PIN_PA24, false); + gpio_set_pin_pull_mode(PIN_PA24, GPIO_PULL_OFF); + gpio_set_pin_direction(PIN_PA25, GPIO_DIRECTION_OUT); + gpio_set_pin_level(PIN_PA25, false); + gpio_set_pin_pull_mode(PIN_PA25, GPIO_PULL_OFF); + + gpio_set_pin_function(PIN_PA24, PINMUX_PA24G_USB_DM); + gpio_set_pin_function(PIN_PA25, PINMUX_PA25G_USB_DP); +} + +//--------------------------------------------------------------------+ +// Board porting API +//--------------------------------------------------------------------+ + +void board_led_write(bool state) +{ + gpio_set_pin_level(LED_PIN, state); +} + +uint32_t board_button_read(void) +{ + // button is active low + return gpio_get_pin_level(BUTTON_PIN) ? 0 : 1; +} + +int board_uart_read(uint8_t* buf, int len) +{ + (void) buf; (void) len; + return 0; +} + +int board_uart_write(void const * buf, int len) +{ + (void) buf; (void) len; + return 0; +} + +#if CFG_TUSB_OS == OPT_OS_NONE +volatile uint32_t system_ticks = 0; +void SysTick_Handler (void) +{ + system_ticks++; +} + +uint32_t board_millis(void) +{ + return system_ticks; +} +#endif + +void HardFault_Handler(void) { + while(1); +}