Initial project setup

managed_components/espressif__tinyusb/hw/bsp/spresense/board.mk

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+# Platforms are: Linux, Darwin, MSYS, CYGWIN
+PLATFORM := $(firstword $(subst _, ,$(shell uname -s 2>/dev/null)))
+
+ifeq ($(PLATFORM),Darwin)
+  # macOS
+  MKSPK = $(TOP)/hw/mcu/sony/cxd56/mkspk/mkspk
+else ifeq ($(PLATFORM),Linux)
+  # Linux
+  MKSPK = $(TOP)/hw/mcu/sony/cxd56/mkspk/mkspk
+else
+  # Cygwin/MSYS2
+  MKSPK = $(TOP)/hw/mcu/sony/cxd56/mkspk/mkspk.exe
+endif
+
+SERIAL ?= /dev/ttyUSB0
+
+CFLAGS += \
+	-DCONFIG_HAVE_DOUBLE \
+	-Dmain=spresense_main \
+	-pipe \
+	-std=gnu11 \
+	-mcpu=cortex-m4 \
+	-mthumb \
+	-mfpu=fpv4-sp-d16 \
+	-mfloat-abi=hard \
+	-mabi=aapcs \
+	-fno-builtin \
+	-fno-strength-reduce \
+	-fomit-frame-pointer \
+	-Wno-error=undef \
+	-Wno-error=cast-align \
+	-Wno-error=unused-parameter \
+	-DCFG_TUSB_MCU=OPT_MCU_CXD56 \
+
+# suppress following warnings from mcu driver
+# lwip/src/core/raw.c:334:43: error: declaration of 'recv' shadows a global declaration
+CFLAGS += -Wno-error=shadow  -Wno-error=redundant-decls
+
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
+SPRESENSE_SDK = $(TOP)/hw/mcu/sony/cxd56/spresense-exported-sdk
+
+SRC_C += src/portable/sony/cxd56/dcd_cxd56.c
+
+INC += \
+	$(SPRESENSE_SDK)/nuttx/include \
+	$(SPRESENSE_SDK)/nuttx/arch \
+	$(SPRESENSE_SDK)/nuttx/arch/chip \
+	$(SPRESENSE_SDK)/nuttx/arch/os \
+	$(SPRESENSE_SDK)/sdk/include \
+
+LIBS += \
+	$(SPRESENSE_SDK)/nuttx/libs/libapps.a \
+	$(SPRESENSE_SDK)/nuttx/libs/libnuttx.a \
+
+LD_FILE = hw/mcu/sony/cxd56/spresense-exported-sdk/nuttx/scripts/ramconfig.ld
+
+LDFLAGS += \
+	-Xlinker --entry=__start \
+	-nostartfiles \
+	-nodefaultlibs \
+	-Wl,--gc-sections \
+	-u spresense_main
+
+$(MKSPK): $(BUILD)/$(PROJECT).elf
+	$(MAKE) -C $(TOP)/hw/mcu/sony/cxd56/mkspk
+
+$(BUILD)/$(PROJECT).spk: $(MKSPK)
+	@echo CREATE $@
+	@$(MKSPK) -c 2 $(BUILD)/$(PROJECT).elf nuttx $@
+
+# flash
+flash: $(BUILD)/$(PROJECT).spk
+	@echo FLASH $<
+	@$(PYTHON) $(TOP)/hw/mcu/sony/cxd56/tools/flash_writer.py -s -c $(SERIAL) -d -b 115200 -n $<

managed_components/espressif__tinyusb/hw/bsp/spresense/board_spresense.c

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+/*
+ * The MIT License (MIT)
+ *
+ * Copyright 2019 Sony Semiconductor Solutions Corporation
+ *
+ * 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 <sys/boardctl.h>
+#include <nuttx/arch.h>
+#include <arch/board/board.h>
+#include <arch/chip/pin.h>
+
+#include "bsp/board_api.h"
+
+/*------------------------------------------------------------------*/
+/* MACRO TYPEDEF CONSTANT ENUM
+ *------------------------------------------------------------------*/
+#define LED_PIN         PIN_I2S1_BCK
+
+#define BUTTON_PIN      PIN_HIF_IRQ_OUT
+
+// Initialize on-board peripherals : led, button, uart and USB
+void board_init(void)
+{
+  boardctl(BOARDIOC_INIT, 0);
+
+  board_gpio_write(PIN_I2S1_BCK, -1);
+  board_gpio_config(PIN_I2S1_BCK, 0, false, true, PIN_FLOAT);
+
+  board_gpio_write(PIN_HIF_IRQ_OUT, -1);
+  board_gpio_config(PIN_HIF_IRQ_OUT, 0, true, true, PIN_FLOAT);
+};
+
+//--------------------------------------------------------------------+
+// Board porting API
+//--------------------------------------------------------------------+
+
+// Turn LED on or off
+void board_led_write(bool state)
+{
+  board_gpio_write(LED_PIN, state);
+}
+
+// Get the current state of button
+// a '1' means active (pressed), a '0' means inactive.
+uint32_t board_button_read(void)
+{
+  if (board_gpio_read(BUTTON_PIN))
+  {
+    return 0;
+  }
+
+  return 1;
+}
+
+// Get characters from UART
+int board_uart_read(uint8_t *buf, int len)
+{
+  int r = read(0, buf, len);
+
+  return r;
+}
+
+// Send characters to UART
+int board_uart_write(void const *buf, int len)
+{
+  int r = write(1, buf, len);
+
+  return r;
+}
+
+// Get current milliseconds
+uint32_t board_millis(void)
+{
+  struct timespec tp;
+
+    /* Wait until RTC is available */
+    while (g_rtc_enabled == false);
+
+    if (clock_gettime(CLOCK_MONOTONIC, &tp))
+    {
+        return 0;
+    }
+
+    return (((uint64_t)tp.tv_sec) * 1000 + tp.tv_nsec / 1000000);
+}