initial commit

third_party/tinyusb/hw/bsp/same7x/family.c

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+/*
+ * 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 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.
+ */
+
+/* metadata:
+   manufacturer: Microchip
+*/
+
+#include "bsp/board_api.h"
+#include "sam.h"
+
+#include "hal/include/hal_gpio.h"
+#include "hal/include/hal_init.h"
+#include "hal/include/hal_usart_async.h"
+#include "hpl/pmc/hpl_pmc.h"
+#include "hpl/usart/hpl_usart_base.h"
+#include "peripheral_clk_config.h"
+
+static inline void board_vbus_set(uint8_t rhport, bool state);
+void _init(void);
+#include "board.h"
+
+#ifndef UART_BUFFER_SIZE
+  #define UART_BUFFER_SIZE 64
+#endif
+
+#define LED_STATE_OFF (1 - LED_STATE_ON)
+
+static struct usart_async_descriptor edbg_com;
+static uint8_t edbg_com_buffer[UART_BUFFER_SIZE];
+static volatile bool uart_busy = false;
+static void tx_complete_cb(const struct usart_async_descriptor *const io_descr) {
+  (void) io_descr;
+  uart_busy = false;
+}
+
+void board_init(void) {
+  init_mcu();
+
+  /* Disable Watchdog */
+  hri_wdt_set_MR_WDDIS_bit(WDT);
+
+#ifdef LED_PIN
+  _pmc_enable_periph_clock(LED_PORT_CLOCK);
+  gpio_set_pin_level(LED_PIN, LED_STATE_OFF);
+  gpio_set_pin_direction(LED_PIN, GPIO_DIRECTION_OUT);
+  gpio_set_pin_function(LED_PIN, GPIO_PIN_FUNCTION_OFF);
+#endif
+
+#ifdef BUTTON_PIN
+  _pmc_enable_periph_clock(BUTTON_PORT_CLOCK);
+  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);
+  gpio_set_pin_function(BUTTON_PIN, GPIO_PIN_FUNCTION_OFF);
+#endif
+
+  _pmc_enable_periph_clock(UART_PORT_CLOCK);
+  gpio_set_pin_function(UART_RX_PIN, UART_RX_FUNCTION);
+  gpio_set_pin_function(UART_TX_PIN, UART_TX_FUNCTION);
+
+  usart_async_init(&edbg_com, BOARD_USART, edbg_com_buffer, sizeof(edbg_com_buffer), _usart_get_usart_async());
+  usart_async_set_baud_rate(&edbg_com, CFG_BOARD_UART_BAUDRATE);
+  usart_async_register_callback(&edbg_com, USART_ASYNC_TXC_CB, tx_complete_cb);
+  usart_async_enable(&edbg_com);
+
+#if CFG_TUSB_OS == OPT_OS_NONE
+  // 1ms tick timer (SystemCoreClock may not be correct after init)
+  SysTick_Config(CONF_CPU_FREQUENCY / 1000);
+#elif CFG_TUSB_OS == OPT_OS_FREERTOS
+  // Explicitly disable systick to prevent its ISR from running before scheduler start
+  SysTick->CTRL &= ~1U;
+  // If freeRTOS is used, IRQ priority is limit by max syscall ( smaller is higher )
+  NVIC_SetPriority((IRQn_Type) ID_USBHS, configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY);
+#endif
+
+  // Enable USB clock
+  _pmc_enable_periph_clock(ID_USBHS);
+
+#if CFG_TUH_ENABLED
+  board_vbus_set(0, true);
+#endif
+}
+
+//--------------------------------------------------------------------+
+// USB Interrupt Handler
+//--------------------------------------------------------------------+
+void USBHS_Handler(void) {
+  tud_int_handler(0);
+}
+
+//--------------------------------------------------------------------+
+// Board porting API
+//--------------------------------------------------------------------+
+
+void board_led_write(bool state) {
+#ifdef LED_PIN
+  gpio_set_pin_level(LED_PIN, state ? LED_STATE_ON : LED_STATE_OFF);
+#else
+  (void) state;
+#endif
+}
+
+uint32_t board_button_read(void) {
+#ifdef BUTTON_PIN
+  return BUTTON_STATE_ACTIVE == gpio_get_pin_level(BUTTON_PIN);
+#else
+  return 0;
+#endif
+}
+
+int board_uart_read(uint8_t *buf, int len) {
+  (void) buf;
+  (void) len;
+  return -1;
+}
+
+int board_uart_write(void const *buf, int len) {
+  while (uart_busy) {}
+  uart_busy = true;
+
+  io_write(&edbg_com.io, buf, len);
+  return len;
+}
+
+// Read 128-bit unique ID via EFC STUI/SPUI commands
+// Must run from RAM since STUI remaps flash to the unique ID
+__attribute__((noinline)) TU_ATTR_SECTION(.ramfunc) static void read_unique_id(uint32_t uid[4]) {
+  // Wait for flash to be ready
+  while (!(EFC->EEFC_FSR & EEFC_FSR_FRDY)) {}
+
+  // Issue Start Read Unique Identifier command
+  EFC->EEFC_FCR = EEFC_FCR_FKEY_PASSWD | EEFC_FCR_FCMD_STUI;
+  while (EFC->EEFC_FSR & EEFC_FSR_FRDY) {}
+
+  // Read 128-bit unique ID from flash base address
+  const volatile uint32_t *flash = (const volatile uint32_t *) IFLASH_ADDR;
+  for (int i = 0; i < 4; i++) {
+    uid[i] = flash[i];
+  }
+
+  // Issue Stop Read Unique Identifier command
+  EFC->EEFC_FCR = EEFC_FCR_FKEY_PASSWD | EEFC_FCR_FCMD_SPUI;
+  while (!(EFC->EEFC_FSR & EEFC_FSR_FRDY)) {}
+}
+
+size_t board_get_unique_id(uint8_t id[], size_t max_len) {
+  const size_t uid_len = 16;
+  if (max_len < uid_len) {
+    return 0;
+  }
+  read_unique_id((uint32_t *)(uintptr_t) id);
+  return uid_len;
+}
+
+#if CFG_TUSB_OS == OPT_OS_NONE
+volatile uint32_t system_ticks = 0;
+
+void SysTick_Handler(void) {
+  system_ticks++;
+}
+
+uint32_t tusb_time_millis_api(void) {
+  return system_ticks;
+}
+#endif
+
+void _init(void) {
+}