PICO: Adding tinyUSB library

lib/main/tinyUSB/hw/bsp/samg/family.c

@@ -0,0 +1,155 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019, hathach (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.
+ *
+ */
+
+#include "sam.h"
+
+// Suppress warning caused by mcu driver
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wcast-qual"
+#pragma GCC diagnostic ignored "-Wredundant-decls"
+#endif
+
+#include "peripheral_clk_config.h"
+#include "hal/include/hal_init.h"
+#include "hal/include/hpl_usart_sync.h"
+#include "hpl/pmc/hpl_pmc.h"
+#include "hal/include/hal_gpio.h"
+
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif
+
+#include "bsp/board_api.h"
+#include "board.h"
+
+
+//--------------------------------------------------------------------+
+// MACRO TYPEDEF CONSTANT ENUM DECLARATION
+//--------------------------------------------------------------------+
+struct _usart_sync_device edbg_com;
+
+//------------- IMPLEMENTATION -------------//
+void board_init(void) {
+  init_mcu();
+
+  _pmc_enable_periph_clock(ID_PIOA);
+
+  /* Disable Watchdog */
+  hri_wdt_set_MR_WDDIS_bit(WDT);
+
+  // LED
+  gpio_set_pin_level(LED_PIN, false);
+  gpio_set_pin_direction(LED_PIN, GPIO_DIRECTION_OUT);
+  gpio_set_pin_function(LED_PIN, GPIO_PIN_FUNCTION_OFF);
+
+  // Button
+  gpio_set_pin_direction(BUTTON_PIN, GPIO_DIRECTION_IN);
+  gpio_set_pin_pull_mode(BUTTON_PIN, GPIO_PULL_UP);
+  gpio_set_pin_function(BUTTON_PIN, GPIO_PIN_FUNCTION_OFF);
+
+  // Uart via EDBG Com
+  _pmc_enable_periph_clock(ID_FLEXCOM7);
+  gpio_set_pin_function(UART_RX_PIN, MUX_PA27B_FLEXCOM7_RXD);
+  gpio_set_pin_function(UART_TX_PIN, MUX_PA28B_FLEXCOM7_TXD);
+
+  _usart_sync_init(&edbg_com, FLEXCOM7);
+  _usart_sync_set_baud_rate(&edbg_com, CFG_BOARD_UART_BAUDRATE);
+  _usart_sync_set_mode(&edbg_com, USART_MODE_ASYNCHRONOUS);
+  _usart_sync_enable(&edbg_com);
+
+#if CFG_TUSB_OS == OPT_OS_NONE
+  // 1ms tick timer (samd SystemCoreClock may not correct)
+  SysTick_Config(CONF_CPU_FREQUENCY / 1000);
+#elif CFG_TUSB_OS == OPT_OS_FREERTOS
+  NVIC_SetPriority(UDP_IRQn, configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY);
+#endif
+
+  // USB Pin, Clock init
+
+  /* Clear SYSIO 10 & 11 for USB DM & DP */
+  hri_matrix_clear_CCFG_SYSIO_reg(MATRIX, CCFG_SYSIO_SYSIO10 | CCFG_SYSIO_SYSIO11);
+
+  // Enable clock
+  _pmc_enable_periph_clock(ID_UDP);
+
+  /* USB Device mode & Transceiver active */
+  hri_matrix_write_CCFG_USBMR_reg(MATRIX, CCFG_USBMR_USBMODE);
+}
+
+//--------------------------------------------------------------------+
+// USB Interrupt Handler
+//--------------------------------------------------------------------+
+void UDP_Handler(void) {
+  #if CFG_TUD_ENABLED
+  tud_int_handler(0);
+  #endif
+}
+
+//--------------------------------------------------------------------+
+// Board porting API
+//--------------------------------------------------------------------+
+
+void board_led_write(bool state) {
+  gpio_set_pin_level(LED_PIN, state);
+}
+
+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) {
+  uint8_t const* buf8 = (uint8_t const*) buf;
+  for (int i = 0; i < len; i++) {
+    while (!_usart_sync_is_ready_to_send(&edbg_com)) {}
+    _usart_sync_write_byte(&edbg_com, buf8[i]);
+  }
+  return len;
+}
+
+#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
+
+// Required by __libc_init_array in startup code if we are compiling using
+// -nostdlib/-nostartfiles.
+void _init(void) {
+
+}