diff options
Diffstat (limited to 'tinyusb/hw/bsp/samd21/family.c')
-rwxr-xr-x | tinyusb/hw/bsp/samd21/family.c | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/tinyusb/hw/bsp/samd21/family.c b/tinyusb/hw/bsp/samd21/family.c new file mode 100755 index 00000000..eb5b5586 --- /dev/null +++ b/tinyusb/hw/bsp/samd21/family.c @@ -0,0 +1,153 @@ +/* + * 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 "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" + +//--------------------------------------------------------------------+ +// Forward USB interrupt events to TinyUSB IRQ Handler +//--------------------------------------------------------------------+ +void USB_Handler(void) +{ + tud_int_handler(0); +} + +//--------------------------------------------------------------------+ +// MACRO TYPEDEF CONSTANT ENUM DECLARATION +//--------------------------------------------------------------------+ + +/* 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); + board_led_write(false); + + // Button init + gpio_set_pin_direction(BUTTON_PIN, GPIO_DIRECTION_IN); + gpio_set_pin_pull_mode(BUTTON_PIN, BUTTON_STATE_ACTIVE ? GPIO_PULL_DOWN : 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); + + // 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 ? LED_STATE_ON : (1-LED_STATE_ON)); +} + +uint32_t board_button_read(void) +{ + return BUTTON_STATE_ACTIVE == gpio_get_pin_level(BUTTON_PIN); +} + +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 |