143 lines
4.3 KiB
C
143 lines
4.3 KiB
C
/*
|
|
* 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 17
|
|
#define BUTTON_PIN 15 // pin D5
|
|
|
|
/* 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);
|
|
|
|
// 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_NONE
|
|
// 1ms tick timer (samd SystemCoreClock may not correct)
|
|
SysTick_Config(CONF_CPU_FREQUENCY / 1000);
|
|
#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);
|
|
|
|
// Output 500hz PWM on D12 (PA19 - TCC0 WO[3]) so we can validate the GCLK0 clock speed with a Saleae.
|
|
_pm_enable_bus_clock(PM_BUS_APBC, TCC0);
|
|
TCC0->PER.bit.PER = 48000000 / 1000;
|
|
TCC0->CC[3].bit.CC = 48000000 / 2000;
|
|
TCC0->CTRLA.bit.ENABLE = true;
|
|
|
|
gpio_set_pin_function(PIN_PA19, PINMUX_PA19F_TCC0_WO3);
|
|
_gclk_enable_channel(TCC0_GCLK_ID, GCLK_CLKCTRL_GEN_GCLK0_Val);
|
|
}
|
|
|
|
//--------------------------------------------------------------------+
|
|
// 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
|