add esp32s2 saola bsp

update cdc_msc_freertos main.c to work with esp32s2
add CMake file

examples/device/cdc_msc_freertos/CMakeLists.txt

@@ -0,0 +1,10 @@
+# The following five lines of boilerplate have to be in your project's
+# CMakeLists in this exact order for cmake to work correctly
+cmake_minimum_required(VERSION 3.5)
+
+# example src directory
+set(EXTRA_COMPONENT_DIRS "src")
+
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+
+project(blink)

examples/device/cdc_msc_freertos/src/CMakeLists.txt

@@ -0,0 +1,36 @@
+# TOP is absolute path to root directory of TinyUSB git repo
+set(TOP "../../../..")
+get_filename_component(TOP "${TOP}" REALPATH)
+
+idf_component_register(SRCS "main.c" "usb_descriptors.c" "msc_disk.c"
+                    INCLUDE_DIRS "."
+                    REQUIRES freertos soc)
+                    
+target_compile_options(${COMPONENT_TARGET} PUBLIC
+  "-DCFG_TUSB_MCU=OPT_MCU_ESP32S2"
+)
+
+idf_component_get_property( FREERTOS_ORIG_INCLUDE_PATH freertos ORIG_INCLUDE_PATH)
+target_include_directories(${COMPONENT_TARGET} PUBLIC
+  "${FREERTOS_ORIG_INCLUDE_PATH}"
+  "${TOP}/hw"
+  "${TOP}/src"
+)
+
+target_sources(${COMPONENT_TARGET} PUBLIC
+  "${TOP}/hw/bsp/esp32s2_saola/esp32s2_saola.c"
+  "${TOP}/src/tusb.c"
+  "${TOP}/src/common/tusb_fifo.c"
+  "${TOP}/src/device/usbd.c"
+  "${TOP}/src/device/usbd_control.c"
+  "${TOP}/src/class/cdc/cdc_device.c"
+  "${TOP}/src/class/dfu/dfu_rt_device.c"
+  "${TOP}/src/class/hid/hid_device.c"
+  "${TOP}/src/class/midi/midi_device.c"
+  "${TOP}/src/class/msc/msc_device.c"
+  "${TOP}/src/class/net/net_device.c"
+  "${TOP}/src/class/usbtmc/usbtmc_device.c"
+  "${TOP}/src/class/vendor/vendor_device.c"
+  "${TOP}/src/portable/espressif/esp32s2/dcd_esp32s2.c"
+)
+

examples/device/cdc_msc_freertos/src/main.c

@@ -56,12 +56,12 @@ StaticTimer_t static_blink;
 TimerHandle_t blink_tm;
 
 // static task for usbd
-#define USBD_STACK_SIZE     (3*(configMINIMAL_STACK_SIZE/2))
+#define USBD_STACK_SIZE     (2*configMINIMAL_STACK_SIZE)
 StackType_t  stack_usbd[USBD_STACK_SIZE];
 StaticTask_t static_task_usbd;
 
 // static task for cdc
-#define CDC_STACK_SZIE      configMINIMAL_STACK_SIZE
+#define CDC_STACK_SZIE      (2*configMINIMAL_STACK_SIZE)
 StackType_t  stack_cdc[CDC_STACK_SZIE];
 StaticTask_t static_task_cdc;
 
@@ -72,11 +72,10 @@ void cdc_task(void* params);
 
 /*------------- MAIN -------------*/
 #if CFG_TUSB_MCU == OPT_MCU_ESP32S2
-// ESP32S2 entry function is app_main()
-#define main    app_main
-#endif
-
+void app_main(void)
+#else
 int main(void)
+#endif
 {
   board_init();
 
@@ -91,21 +90,16 @@ int main(void)
 
   // Create task
 #if CFG_TUD_CDC
-  (void) xTaskCreateStatic( cdc_task, "cdc", CDC_STACK_SZIE, NULL, configMAX_PRIORITIES-2, stack_cdc, &static_task_cdc);
+  (void) xTaskCreateStatic( cdc_task, "cdc", CDC_STACK_SZIE, NULL, configMAX_PRIORITIES-1, stack_cdc, &static_task_cdc);
 #endif
 
-#if CFG_TUSB_MCU == OPT_MCU_ESP32S2
-  // skip starting scheduler for ESP32 S2 (already started)
-  while(1)
-  {
-    vTaskSuspend(NULL);
-  }
-#else
+  // skip starting scheduler (and return) for ESP32-S2
+#if CFG_TUSB_MCU != OPT_MCU_ESP32S2
   vTaskStartScheduler();
   NVIC_SystemReset();
+  return 0;
 #endif
 
-  return 0;
 }
 
 // USB Device Driver task
@@ -186,7 +180,8 @@ void cdc_task(void* params)
       }
     }
 
-    taskYIELD();
+    // For ESP32-S2 this delay is essential to allow idle how to run and reset wdt
+    vTaskDelay(pdMS_TO_TICKS(10));
   }
 }
 

hw/bsp/esp32s2_saola/esp32s2_saola.c

@@ -0,0 +1,77 @@
+/* 
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020, 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 "bsp/board.h"
+#include "driver/gpio.h"
+#include "hal/usb_hal.h"
+
+//--------------------------------------------------------------------+
+// MACRO TYPEDEF CONSTANT ENUM DECLARATION
+//--------------------------------------------------------------------+
+
+#define LED_PIN   21
+
+// Initialize on-board peripherals : led, button, uart and USB
+void board_init(void)
+{
+  // LED
+  gpio_pad_select_gpio(LED_PIN);
+  gpio_set_direction(LED_PIN, GPIO_MODE_OUTPUT);
+
+  // USB Controller Hal init
+  usb_hal_context_t hal = {
+    .use_external_phy = false // use built-in PHY
+  };
+  usb_hal_init(&hal);
+}
+
+// Turn LED on or off
+void board_led_write(bool state)
+{
+  gpio_set_level(LED_PIN, state);
+}
+
+// Get the current state of button
+// a '1' means active (pressed), a '0' means inactive.
+uint32_t board_button_read(void)
+{
+  return 0;
+}
+
+// Get characters from UART
+int board_uart_read(uint8_t* buf, int len)
+{
+  (void) buf; (void) len;
+  return 0;
+}
+
+// Send characters to UART
+int board_uart_write(void const * buf, int len)
+{
+  (void) buf; (void) len;
+  return 0;
+}
+