135 lines
4.5 KiB
C
135 lines
4.5 KiB
C
/**************************************************************************/
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/*!
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@file board_metro_m4_express.c
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@author hathach (tinyusb.org)
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@section LICENSE
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Software License Agreement (BSD License)
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Copyright (c) 2018, hathach (tinyusb.org)
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. Neither the name of the copyright holders nor the
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names of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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This file is part of the tinyusb stack.
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*/
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/**************************************************************************/
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#include "bsp/board.h"
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#include "sam.h"
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#include "hal/include/hal_gpio.h"
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#include "hal/include/hal_init.h"
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#include "hri/hri_nvmctrl_d21.h"
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#include "hpl/gclk/hpl_gclk_base.h"
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#include "hpl_pm_config.h"
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#include "hpl/pm/hpl_pm_base.h"
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#include "tusb_option.h"
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//--------------------------------------------------------------------+
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// MACRO TYPEDEF CONSTANT ENUM DECLARATION
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//--------------------------------------------------------------------+
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#define LED_PIN 17
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/* Referenced GCLKs, should be initialized firstly */
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#define _GCLK_INIT_1ST (1 << 0 | 1 << 1)
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/* Not referenced GCLKs, initialized last */
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#define _GCLK_INIT_LAST (~_GCLK_INIT_1ST)
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void board_init(void)
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{
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// Clock init ( follow hpl_init.c )
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hri_nvmctrl_set_CTRLB_RWS_bf(NVMCTRL, 2);
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_pm_init();
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_sysctrl_init_sources();
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#if _GCLK_INIT_1ST
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_gclk_init_generators_by_fref(_GCLK_INIT_1ST);
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#endif
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_sysctrl_init_referenced_generators();
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_gclk_init_generators_by_fref(_GCLK_INIT_LAST);
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// Led init
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gpio_set_pin_direction(LED_PIN, GPIO_DIRECTION_OUT);
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gpio_set_pin_level(LED_PIN, 0);
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#if CFG_TUSB_OS == OPT_OS_NONE
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// Tick init, samd SystemCoreClock may not correct
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SysTick_Config(CONF_CPU_FREQUENCY/1000);
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#endif
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/* USB Clock init
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* The USB module requires a GCLK_USB of 48 MHz ~ 0.25% clock
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* for low speed and full speed operation. */
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_pm_enable_bus_clock(PM_BUS_APBB, USB);
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_pm_enable_bus_clock(PM_BUS_AHB, USB);
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_gclk_enable_channel(USB_GCLK_ID, GCLK_CLKCTRL_GEN_GCLK0_Val);
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// USB Pin Init
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gpio_set_pin_direction(PIN_PA24, GPIO_DIRECTION_OUT);
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gpio_set_pin_level(PIN_PA24, false);
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gpio_set_pin_pull_mode(PIN_PA24, GPIO_PULL_OFF);
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gpio_set_pin_direction(PIN_PA25, GPIO_DIRECTION_OUT);
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gpio_set_pin_level(PIN_PA25, false);
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gpio_set_pin_pull_mode(PIN_PA25, GPIO_PULL_OFF);
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gpio_set_pin_function(PIN_PA24, PINMUX_PA24G_USB_DM);
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gpio_set_pin_function(PIN_PA25, PINMUX_PA25G_USB_DP);
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// Output 500hz PWM on D12 (PA19 - TCC0 WO[3]) so we can validate the GCLK0 clock speed with a Saleae.
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_pm_enable_bus_clock(PM_BUS_APBC, TCC0);
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TCC0->PER.bit.PER = 48000000 / 1000;
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TCC0->CC[3].bit.CC = 48000000 / 2000;
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TCC0->CTRLA.bit.ENABLE = true;
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gpio_set_pin_function(PIN_PA19, PINMUX_PA19F_TCC0_WO3);
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_gclk_enable_channel(TCC0_GCLK_ID, GCLK_CLKCTRL_GEN_GCLK0_Val);
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}
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void board_led_control(bool state)
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{
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gpio_set_pin_level(LED_PIN, state);
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}
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/*------------------------------------------------------------------*/
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/* TUSB HAL MILLISECOND
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*------------------------------------------------------------------*/
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#if CFG_TUSB_OS == OPT_OS_NONE
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volatile uint32_t system_ticks = 0;
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void SysTick_Handler (void)
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{
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system_ticks++;
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}
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uint32_t tusb_hal_millis(void)
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{
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return board_tick2ms(system_ticks);
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}
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#endif
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