Merge pull request #959 from KarlK90/gd32vf103-support-tiny-usb

[PORT] Add GD32VF103 support and Sipeed Longan Nano Board support

.github/workflows/build_riscv.yml

@@ -16,6 +16,7 @@ jobs:
         family:
         # Alphabetical order
         - 'fomu'
+        - 'gd32vf103'
     steps:
     - name: Setup Python
       uses: actions/setup-python@v2

.gitmodules

@@ -124,3 +124,6 @@
 [submodule "hw/mcu/mindmotion/mm32sdk"]
 	path = hw/mcu/mindmotion/mm32sdk
 	url = https://github.com/zhangslice/mm32sdk.git
+[submodule "hw/mcu/gd/nuclei-sdk"]
+	path = hw/mcu/gd/nuclei-sdk
+	url = https://github.com/Nuclei-Software/nuclei-sdk.git

examples/device/cdc_msc_freertos/src/FreeRTOSConfig.h

@@ -150,11 +150,14 @@ extern uint32_t SystemCoreClock;
 //--------------------------------------------------------------------+
 // Interrupt nesting behavior configuration.
 //--------------------------------------------------------------------+
-/* Cortex-M specific definitions. __NVIC_PRIO_BITS is defined in core_cmx.h */
+#if defined(__NVIC_PRIO_BITS)
-#ifdef __NVIC_PRIO_BITS
+  // For Cortex-M specific: __NVIC_PRIO_BITS is defined in core_cmx.h
 	#define configPRIO_BITS       __NVIC_PRIO_BITS
+#elif defined(__ECLIC_INTCTLBITS)
+  // RISC-V Bumblebee core from nuclei
+  #define configPRIO_BITS       __ECLIC_INTCTLBITS
 #else
-  #error "This port requires __NVIC_PRIO_BITS to be defined"
+  #error "FreeRTOS configPRIO_BITS to be defined"
 #endif
 
 /* The lowest interrupt priority that can be used in a call to a "set priority" function. */

examples/device/hid_composite_freertos/src/FreeRTOSConfig.h

@@ -150,11 +150,14 @@ extern uint32_t SystemCoreClock;
 //--------------------------------------------------------------------+
 // Interrupt nesting behavior configuration.
 //--------------------------------------------------------------------+
-/* Cortex-M specific definitions. __NVIC_PRIO_BITS is defined in core_cmx.h */
+#if defined(__NVIC_PRIO_BITS)
-#ifdef __NVIC_PRIO_BITS
+  // For Cortex-M specific: __NVIC_PRIO_BITS is defined in core_cmx.h
 	#define configPRIO_BITS       __NVIC_PRIO_BITS
+#elif defined(__ECLIC_INTCTLBITS)
+  // RISC-V Bumblebee core from nuclei
+  #define configPRIO_BITS       __ECLIC_INTCTLBITS
 #else
-  #error "This port requires __NVIC_PRIO_BITS to be defined"
+  #error "FreeRTOS configPRIO_BITS to be defined"
 #endif
 
 /* The lowest interrupt priority that can be used in a call to a "set priority" function. */

hw/bsp/board_mcu.h

@@ -130,6 +130,9 @@
 #elif CFG_TUSB_MCU == OPT_MCU_RX63X || CFG_TUSB_MCU == OPT_MCU_RX65X
   // no header needed
 
+#elif CFG_TUSB_MCU == OPT_MCU_GD32VF103
+  #include "gd32vf103.h"
+
 #else
   #error "Missing MCU header"
 #endif

hw/bsp/fomu/family.mk

@@ -5,7 +5,7 @@ CFLAGS += \
   -nostdlib \
   -DCFG_TUSB_MCU=OPT_MCU_VALENTYUSB_EPTRI
 
-# Cross Compiler for RISC-V
+# Toolchain from https://github.com/xpack-dev-tools/riscv-none-embed-gcc-xpack
 CROSS_COMPILE = riscv-none-embed-
 
 # All source paths should be relative to the top level.

hw/bsp/gd32vf103/boards/sipeed_longan_nano/board.h

@@ -0,0 +1,20 @@
+#ifndef _NUCLEI_SDK_HAL_H
+#define _NUCLEI_SDK_HAL_H
+
+#include "gd32vf103c_longan_nano.h"
+
+// 4 bits for interrupt level, 0 for priority.
+// level 0 = lowest priority, level 15 = highest priority.
+#define __ECLIC_INTCTLBITS  4
+
+#define __SYSTEM_CLOCK      72000000
+#define HXTAL_VALUE         ((uint32_t)8000000)
+
+#define SOC_DEBUG_UART      GD32_COM0
+
+#define DBG_KEY_UNLOCK      0x4B5A6978
+#define DBG_CMD_RESET       0x1
+#define DBG_KEY             REG32(DBG + 0x0C)
+#define DBG_CMD             REG32(DBG + 0x08)
+
+#endif

hw/bsp/gd32vf103/boards/sipeed_longan_nano/board.mk

@@ -0,0 +1,13 @@
+LONGAN_NANO_SDK_BSP = $(GD32VF103_SDK_SOC)/Board/gd32vf103c_longan_nano
+LINKER_SCRIPTS = $(LONGAN_NANO_SDK_BSP)/Source/GCC
+
+# All source paths should be relative to the top level.
+LD_FILE = $(LINKER_SCRIPTS)/gcc_gd32vf103xb_flashxip.ld # Longan Nano 128k ROM 32k RAM
+#LD_FILE = $(LINKER_SCRIPTS)/gcc_gd32vf103x8_flashxip.ld # Longan Nano Lite 64k ROM 20k RAM
+
+SRC_C += $(LONGAN_NANO_SDK_BSP)/Source/gd32vf103c_longan_nano.c
+INC += $(TOP)/$(LONGAN_NANO_SDK_BSP)/Include
+
+# Longan Nano 128k ROM 32k RAM
+JLINK_DEVICE = gd32vf103cbt6
+#JLINK_DEVICE = gd32vf103c8t6 # Longan Nano Lite 64k ROM 20k RAM

hw/bsp/gd32vf103/family.c

@@ -0,0 +1,197 @@
+/*
+ * 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 "board.h"
+#include "drv_usb_hw.h"
+#include "drv_usb_dev.h"
+
+#include "../board.h"
+
+//--------------------------------------------------------------------+
+// Forward USB interrupt events to TinyUSB IRQ Handler
+//--------------------------------------------------------------------+
+
+void USBFS_IRQHandler(void) { tud_int_handler(0); }
+
+//--------------------------------------------------------------------+
+// MACRO TYPEDEF CONSTANT ENUM
+//--------------------------------------------------------------------+
+
+#define USB_NO_VBUS_PIN
+
+// According to GD32VF103 user manual clock tree:
+// Systick clock = AHB clock / 4.
+#define TIMER_TICKS         ((SystemCoreClock / 4) / 1000) 
+
+#define BUTTON_PORT         GPIOA
+#define BUTTON_PIN          GPIO_PIN_0
+#define BUTTON_STATE_ACTIVE 1
+
+#define UART_DEV            SOC_DEBUG_UART
+
+#define LED_PIN             LED_R
+
+void board_init(void) {
+  /* Disable interrupts during init */
+  __disable_irq();
+
+#if CFG_TUSB_OS == OPT_OS_NONE
+  SysTick_Config(TIMER_TICKS);
+#endif
+
+  rcu_periph_clock_enable(RCU_GPIOA);
+  rcu_periph_clock_enable(RCU_GPIOB);
+  rcu_periph_clock_enable(RCU_GPIOC);
+  rcu_periph_clock_enable(RCU_GPIOD);
+  rcu_periph_clock_enable(RCU_AF);
+
+#ifdef BUTTON_PIN
+  gpio_init(BUTTON_PORT, GPIO_MODE_IN_FLOATING, GPIO_OSPEED_50MHZ, BUTTON_PIN);
+#endif
+
+#ifdef LED_PIN
+  gd_led_init(LED_PIN);
+#endif
+
+#if defined(UART_DEV)
+  gd_com_init(UART_DEV);
+#endif
+
+  /* USB D+ and D- pins don't need to be configured. */
+  /* Configure VBUS Pin */
+#ifndef USB_NO_VBUS_PIN
+  gpio_init(GPIOA, GPIO_MODE_IN_FLOATING, GPIO_OSPEED_50MHZ, GPIO_PIN_9);
+#endif
+
+  /* This for ID line debug */
+  // gpio_init(GPIOA, GPIO_MODE_AF_OD, GPIO_OSPEED_50MHZ, GPIO_PIN_10);
+
+  /* Enable USB OTG clock */
+  usb_rcu_config();
+
+  /* Reset USB OTG peripheral */
+  rcu_periph_reset_enable(RCU_USBFSRST);
+  rcu_periph_reset_disable(RCU_USBFSRST);
+
+  /* Configure USBFS IRQ */
+  ECLIC_Register_IRQ(USBFS_IRQn, ECLIC_NON_VECTOR_INTERRUPT,
+                     ECLIC_POSTIVE_EDGE_TRIGGER, 3, 0, NULL);
+
+  /* Retrieve otg core registers */
+  usb_gr* otg_core_regs = (usb_gr*)(USBFS_REG_BASE + USB_REG_OFFSET_CORE);
+
+#ifdef USB_NO_VBUS_PIN
+  /* Disable VBUS sense*/
+  otg_core_regs->GCCFG |= GCCFG_VBUSIG | GCCFG_PWRON | GCCFG_VBUSBCEN;
+#else
+  /* Enable VBUS sense via pin PA9 */
+  otg_core_regs->GCCFG |= GCCFG_VBUSIG | GCCFG_PWRON | GCCFG_VBUSBCEN;
+  otg_core_regs->GCCFG &= ~GCCFG_VBUSIG;
+#endif
+
+  /* Enable interrupts globaly */
+  __enable_irq();
+}
+
+void gd32vf103_reset(void) {
+  /* The MTIMER unit of the GD32VF103 doesn't have the MSFRST
+   * register to generate a software reset request.
+   * BUT instead two undocumented registers in the debug peripheral
+   * that allow issueing a software reset.
+   * https://github.com/esmil/gd32vf103inator/blob/master/include/gd32vf103/dbg.h
+   */
+  DBG_KEY = DBG_KEY_UNLOCK;
+  DBG_CMD = DBG_CMD_RESET;
+}
+
+//--------------------------------------------------------------------+
+// Board porting API
+//--------------------------------------------------------------------+
+
+void board_led_write(bool state) {
+  state ? gd_led_on(LED_PIN) : gd_led_off(LED_PIN);
+}
+
+uint32_t board_button_read(void) {
+  return BUTTON_STATE_ACTIVE == gpio_input_bit_get(BUTTON_PORT, BUTTON_PIN);
+}
+
+int board_uart_read(uint8_t* buf, int len) {
+#if defined(UART_DEV)
+  int rxsize = len;
+  while (rxsize--) {
+    *(uint8_t*)buf = usart_read(UART_DEV);
+    buf++;
+  }
+  return len;
+#else
+  (void)buf;
+  (void)len;
+  return 0;
+#endif
+}
+
+int board_uart_write(void const* buf, int len) {
+#if defined(UART_DEV)
+  int txsize = len;
+  while (txsize--) {
+    usart_write(UART_DEV, *(uint8_t*)buf);
+    buf++;
+  }
+  return len;
+#else
+  (void)buf;
+  (void)len;
+  return 0;
+#endif
+}
+
+#if CFG_TUSB_OS == OPT_OS_NONE
+volatile uint32_t system_ticks = 0;
+void eclic_mtip_handler(void) {
+  system_ticks++;
+  SysTick_Reload(TIMER_TICKS);
+}
+uint32_t board_millis(void) { return system_ticks; }
+#endif
+
+#ifdef USE_FULL_ASSERT
+/**
+ * @brief  Reports the name of the source file and the source line number
+ *         where the assert_param error has occurred.
+ * @param  file: pointer to the source file name
+ * @param  line: assert_param error line source number
+ * @retval None
+ */
+void assert_failed(char* file, uint32_t line) {
+  /* USER CODE BEGIN 6 */
+  /* User can add his own implementation to report the file name and line
+     number,
+     tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line)
+   */
+  /* USER CODE END 6 */
+}
+#endif /* USE_FULL_ASSERT */

hw/bsp/gd32vf103/family.mk

@@ -0,0 +1,68 @@
+# https://www.embecosm.com/resources/tool-chain-downloads/#riscv-stable
+#CROSS_COMPILE ?= riscv32-unknown-elf-
+
+# Toolchain from https://nucleisys.com/download.php
+#CROSS_COMPILE ?= riscv-nuclei-elf-
+
+# Toolchain from https://github.com/xpack-dev-tools/riscv-none-embed-gcc-xpack
+CROSS_COMPILE ?= riscv-none-embed-
+
+# Submodules
+NUCLEI_SDK = hw/mcu/gd/nuclei-sdk
+DEPS_SUBMODULES += $(NUCLEI_SDK)
+
+# Nuclei-SDK paths
+GD32VF103_SDK_SOC = $(NUCLEI_SDK)/SoC/gd32vf103
+GD32VF103_SDK_DRIVER = $(GD32VF103_SDK_SOC)/Common/Source/Drivers
+LIBC_STUBS = $(GD32VF103_SDK_SOC)/Common/Source/Stubs
+STARTUP_ASM = $(GD32VF103_SDK_SOC)/Common/Source/GCC
+
+include $(TOP)/$(BOARD_PATH)/board.mk
+
+SKIP_NANOLIB = 1
+
+CFLAGS += \
+	-march=rv32imac \
+	-mabi=ilp32 \
+	-mcmodel=medlow \
+	-mstrict-align \
+	-nostdlib -nostartfiles \
+	-DCFG_TUSB_MCU=OPT_MCU_GD32VF103 \
+	-DDOWNLOAD_MODE=DOWNLOAD_MODE_FLASHXIP \
+	-DGD32VF103 
+
+# mcu driver cause following warnings
+CFLAGS += -Wno-error=unused-parameter
+
+SRC_C += \
+	src/portable/st/synopsys/dcd_synopsys.c \
+	$(GD32VF103_SDK_DRIVER)/gd32vf103_rcu.c \
+	$(GD32VF103_SDK_DRIVER)/gd32vf103_gpio.c \
+	$(GD32VF103_SDK_DRIVER)/Usb/gd32vf103_usb_hw.c \
+	$(GD32VF103_SDK_DRIVER)/gd32vf103_usart.c \
+	$(LIBC_STUBS)/sbrk.c \
+	$(LIBC_STUBS)/close.c \
+	$(LIBC_STUBS)/isatty.c \
+	$(LIBC_STUBS)/fstat.c \
+	$(LIBC_STUBS)/lseek.c \
+	$(LIBC_STUBS)/read.c 
+
+SRC_S += \
+	$(STARTUP_ASM)/startup_gd32vf103.S \
+	$(STARTUP_ASM)/intexc_gd32vf103.S
+
+INC += \
+	$(TOP)/$(BOARD_PATH) \
+	$(TOP)/$(NUCLEI_SDK)/NMSIS/Core/Include \
+	$(TOP)/$(GD32VF103_SDK_SOC)/Common/Include \
+	$(TOP)/$(GD32VF103_SDK_SOC)/Common/Include/Usb
+
+# For freeRTOS port source
+FREERTOS_PORT = RISC-V
+
+# For flash-jlink target
+JLINK_IF = jtag
+
+# flash target ROM bootloader
+flash: $(BUILD)/$(PROJECT).bin
+	dfu-util -R -a 0 --dfuse-address 0x08000000 -D $<

hw/bsp/gd32vf103/system_gd32vf103.c

@@ -0,0 +1,668 @@
+/*!
+ \file    system_gd32vf103.h
+\brief   RISC-V Device Peripheral Access Layer Source File for
+          GD32VF103 Device Series
+
+*/
+
+/*
+    Copyright (c) 2020, GigaDevice Semiconductor Inc.
+
+    Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice, this
+       list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+    3. Neither the name of the copyright holder nor the names of its contributors
+       may be used to endorse or promote products derived from this software without
+       specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+OF SUCH DAMAGE.
+*/
+
+/* This file refers the RISC-V standard, some adjustments are made according to GigaDevice chips */
+#include "board.h"
+
+/* system frequency define */
+#define __IRC8M           (IRC8M_VALUE)            /* internal 8 MHz RC oscillator frequency */
+#define __HXTAL           (HXTAL_VALUE)            /* high speed crystal oscillator frequency */
+#define __SYS_OSC_CLK     (__IRC8M)                /* main oscillator frequency */
+#define __SYSTEM_CLOCK_HXTAL                    (HXTAL_VALUE)
+
+#if !defined(__SYSTEM_CLOCK)
+#define __SYSTEM_CLOCK 72000000
+#endif
+
+#if __SYSTEM_CLOCK == 48000000
+  #define __SYSTEM_CLOCK_48M_PLL_HXTAL            (uint32_t)(48000000)
+  uint32_t SystemCoreClock = __SYSTEM_CLOCK_48M_PLL_HXTAL;
+  static void system_clock_48m_hxtal(void);
+
+#elif __SYSTEM_CLOCK == 72000000
+  #define __SYSTEM_CLOCK_72M_PLL_HXTAL            (uint32_t)(72000000)
+  uint32_t SystemCoreClock = __SYSTEM_CLOCK_72M_PLL_HXTAL;
+  static void system_clock_72m_hxtal(void);
+
+#elif __SYSTEM_CLOCK == 96000000
+  #define __SYSTEM_CLOCK_96M_PLL_HXTAL            (uint32_t)(96000000)
+  uint32_t SystemCoreClock = __SYSTEM_CLOCK_96M_PLL_HXTAL;
+  static void system_clock_96m_hxtal(void);
+
+#else
+#error No valid system clock configuration set!
+#endif
+
+/* configure the system clock */
+static void system_clock_config(void);
+
+/*!
+    \brief      configure the system clock
+    \param[in]  none
+    \param[out] none
+    \retval     none
+*/
+static void system_clock_config(void)
+{
+#if defined (__SYSTEM_CLOCK_48M_PLL_HXTAL)
+    system_clock_48m_hxtal();
+#elif defined (__SYSTEM_CLOCK_72M_PLL_HXTAL)
+    system_clock_72m_hxtal();
+#elif defined (__SYSTEM_CLOCK_96M_PLL_HXTAL)
+    system_clock_96m_hxtal();
+#endif /* __SYSTEM_CLOCK_HXTAL */
+}
+
+/*!
+    \brief      setup the microcontroller system, initialize the system
+    \param[in]  none
+    \param[out] none
+    \retval     none
+*/
+void SystemInit(void)
+{
+    /* reset the RCC clock configuration to the default reset state */
+    /* enable IRC8M */
+    RCU_CTL |= RCU_CTL_IRC8MEN;
+    
+    /* reset SCS, AHBPSC, APB1PSC, APB2PSC, ADCPSC, CKOUT0SEL bits */
+    RCU_CFG0 &= ~(RCU_CFG0_SCS | RCU_CFG0_AHBPSC | RCU_CFG0_APB1PSC | RCU_CFG0_APB2PSC |
+                  RCU_CFG0_ADCPSC | RCU_CFG0_ADCPSC_2 | RCU_CFG0_CKOUT0SEL);
+
+    /* reset HXTALEN, CKMEN, PLLEN bits */
+    RCU_CTL &= ~(RCU_CTL_HXTALEN | RCU_CTL_CKMEN | RCU_CTL_PLLEN);
+
+    /* Reset HXTALBPS bit */
+    RCU_CTL &= ~(RCU_CTL_HXTALBPS);
+
+    /* reset PLLSEL, PREDV0_LSB, PLLMF, USBFSPSC bits */
+    
+    RCU_CFG0 &= ~(RCU_CFG0_PLLSEL | RCU_CFG0_PREDV0_LSB | RCU_CFG0_PLLMF |
+                  RCU_CFG0_USBFSPSC | RCU_CFG0_PLLMF_4);
+    RCU_CFG1 = 0x00000000U;
+
+    /* Reset HXTALEN, CKMEN, PLLEN, PLL1EN and PLL2EN bits */
+    RCU_CTL &= ~(RCU_CTL_PLLEN | RCU_CTL_PLL1EN | RCU_CTL_PLL2EN | RCU_CTL_CKMEN | RCU_CTL_HXTALEN);
+    /* disable all interrupts */
+    RCU_INT = 0x00FF0000U;
+
+    /* Configure the System clock source, PLL Multiplier, AHB/APBx prescalers and Flash settings */
+    system_clock_config();
+}
+
+/*!
+    \brief      update the SystemCoreClock with current core clock retrieved from cpu registers
+    \param[in]  none
+    \param[out] none
+    \retval     none
+*/
+void SystemCoreClockUpdate(void)
+{
+    uint32_t scss;
+    uint32_t pllsel, predv0sel, pllmf, ck_src;
+    uint32_t predv0, predv1, pll1mf;
+
+    scss = GET_BITS(RCU_CFG0, 2, 3);
+
+    switch (scss)
+    {
+        /* IRC8M is selected as CK_SYS */
+        case SEL_IRC8M:
+            SystemCoreClock = IRC8M_VALUE;
+            break;
+            
+        /* HXTAL is selected as CK_SYS */
+        case SEL_HXTAL:
+            SystemCoreClock = HXTAL_VALUE;
+            break;
+            
+        /* PLL is selected as CK_SYS */
+        case SEL_PLL:
+            /* PLL clock source selection, HXTAL or IRC8M/2 */
+            pllsel = (RCU_CFG0 & RCU_CFG0_PLLSEL);
+
+
+            if(RCU_PLLSRC_IRC8M_DIV2 == pllsel){
+                /* PLL clock source is IRC8M/2 */
+                ck_src = IRC8M_VALUE / 2U;
+            }else{
+                /* PLL clock source is HXTAL */
+                ck_src = HXTAL_VALUE;
+
+                predv0sel = (RCU_CFG1 & RCU_CFG1_PREDV0SEL);
+
+                /* source clock use PLL1 */
+                if(RCU_PREDV0SRC_CKPLL1 == predv0sel){
+                    predv1 = ((RCU_CFG1 & RCU_CFG1_PREDV1) >> 4) + 1U;
+                    pll1mf = ((RCU_CFG1 & RCU_CFG1_PLL1MF) >> 8) + 2U;
+                    if(17U == pll1mf){
+                        pll1mf = 20U;
+                    }
+                    ck_src = (ck_src / predv1) * pll1mf;
+                }
+                predv0 = (RCU_CFG1 & RCU_CFG1_PREDV0) + 1U;
+                ck_src /= predv0;
+            }
+
+            /* PLL multiplication factor */
+            pllmf = GET_BITS(RCU_CFG0, 18, 21);
+
+            if((RCU_CFG0 & RCU_CFG0_PLLMF_4)){
+                pllmf |= 0x10U;
+            }
+
+            if(pllmf >= 15U){
+                pllmf += 1U;
+            }else{
+                pllmf += 2U;
+            }
+
+            SystemCoreClock = ck_src * pllmf;
+
+            if(15U == pllmf){
+                /* PLL source clock multiply by 6.5 */
+                SystemCoreClock = ck_src * 6U + ck_src / 2U;
+            }
+
+            break;
+
+        /* IRC8M is selected as CK_SYS */
+        default:
+            SystemCoreClock = IRC8M_VALUE;
+            break;
+    }
+}
+
+#if defined (__SYSTEM_CLOCK_48M_PLL_HXTAL)
+/*!
+    \brief      configure the system clock to 48M by PLL which selects HXTAL(MD/HD/XD:8M; CL:25M) as its clock source
+    \param[in]  none
+    \param[out] none
+    \retval     none
+*/
+static void system_clock_48m_hxtal(void)
+{
+    uint32_t timeout = 0U;
+    uint32_t stab_flag = 0U;
+
+    /* enable HXTAL */
+    RCU_CTL |= RCU_CTL_HXTALEN;
+
+    /* wait until HXTAL is stable or the startup time is longer than HXTAL_STARTUP_TIMEOUT */
+    do{
+        timeout++;
+        stab_flag = (RCU_CTL & RCU_CTL_HXTALSTB);
+    }while((0U == stab_flag) && (HXTAL_STARTUP_TIMEOUT != timeout));
+
+    /* if fail */
+    if(0U == (RCU_CTL & RCU_CTL_HXTALSTB)){
+        while(1){
+        }
+    }
+
+    /* HXTAL is stable */
+    /* AHB = SYSCLK */
+    RCU_CFG0 |= RCU_AHB_CKSYS_DIV1;
+    /* APB2 = AHB/1 */
+    RCU_CFG0 |= RCU_APB2_CKAHB_DIV1;
+    /* APB1 = AHB/2 */
+    RCU_CFG0 |= RCU_APB1_CKAHB_DIV2;
+
+    /* CK_PLL = (CK_PREDIV0) * 12 = 48 MHz */
+    RCU_CFG0 &= ~(RCU_CFG0_PLLMF | RCU_CFG0_PLLMF_4);
+    RCU_CFG0 |= (RCU_PLLSRC_HXTAL | RCU_PLL_MUL12);
+
+    if(HXTAL_VALUE==25000000){
+
+        /* CK_PREDIV0 = (CK_HXTAL)/5 *8 /10 = 4 MHz */
+        RCU_CFG1 &= ~(RCU_CFG1_PREDV0SEL | RCU_CFG1_PLL1MF | RCU_CFG1_PREDV1 | RCU_CFG1_PREDV0);
+        RCU_CFG1 |= (RCU_PREDV0SRC_CKPLL1 | RCU_PLL1_MUL8 | RCU_PREDV1_DIV5 | RCU_PREDV0_DIV10);
+
+        /* enable PLL1 */
+        RCU_CTL |= RCU_CTL_PLL1EN;
+        /* wait till PLL1 is ready */
+        while((RCU_CTL & RCU_CTL_PLL1STB) == 0){
+        }
+
+    }else if(HXTAL_VALUE==8000000){
+        RCU_CFG1 &= ~(RCU_CFG1_PREDV0SEL | RCU_CFG1_PREDV1 | RCU_CFG1_PLL1MF | RCU_CFG1_PREDV0);
+        RCU_CFG1 |= (RCU_PREDV0SRC_HXTAL | RCU_PREDV0_DIV2 );
+    }
+
+
+
+    /* enable PLL */
+    RCU_CTL |= RCU_CTL_PLLEN;
+
+    /* wait until PLL is stable */
+    while(0U == (RCU_CTL & RCU_CTL_PLLSTB)){
+    }
+
+    /* select PLL as system clock */
+    RCU_CFG0 &= ~RCU_CFG0_SCS;
+    RCU_CFG0 |= RCU_CKSYSSRC_PLL;
+
+    /* wait until PLL is selected as system clock */
+    while(0U == (RCU_CFG0 & RCU_SCSS_PLL)){
+    }
+}
+
+#elif defined (__SYSTEM_CLOCK_72M_PLL_HXTAL)
+/*!
+    \brief      configure the system clock to 72M by PLL which selects HXTAL(MD/HD/XD:8M; CL:25M) as its clock source
+    \param[in]  none
+    \param[out] none
+    \retval     none
+*/
+static void system_clock_72m_hxtal(void)
+{
+    uint32_t timeout = 0U;
+    uint32_t stab_flag = 0U;
+
+    /* enable HXTAL */
+    RCU_CTL |= RCU_CTL_HXTALEN;
+
+    /* wait until HXTAL is stable or the startup time is longer than HXTAL_STARTUP_TIMEOUT */
+    do{
+        timeout++;
+        stab_flag = (RCU_CTL & RCU_CTL_HXTALSTB);
+    }while((0U == stab_flag) && (HXTAL_STARTUP_TIMEOUT != timeout));
+
+    /* if fail */
+    if(0U == (RCU_CTL & RCU_CTL_HXTALSTB)){
+        while(1){
+        }
+    }
+
+    /* HXTAL is stable */
+    /* AHB = SYSCLK */
+    RCU_CFG0 |= RCU_AHB_CKSYS_DIV1;
+    /* APB2 = AHB/1 */
+    RCU_CFG0 |= RCU_APB2_CKAHB_DIV1;
+    /* APB1 = AHB/2 */
+    RCU_CFG0 |= RCU_APB1_CKAHB_DIV2;
+
+    /* CK_PLL = (CK_PREDIV0) * 18 = 72 MHz */ 
+    RCU_CFG0 &= ~(RCU_CFG0_PLLMF | RCU_CFG0_PLLMF_4);
+    RCU_CFG0 |= (RCU_PLLSRC_HXTAL | RCU_PLL_MUL18);
+
+
+    if(HXTAL_VALUE==25000000){
+
+        /* CK_PREDIV0 = (CK_HXTAL)/5 *8 /10 = 4 MHz */
+        RCU_CFG1 &= ~(RCU_CFG1_PREDV0SEL | RCU_CFG1_PLL1MF | RCU_CFG1_PREDV1 | RCU_CFG1_PREDV0);
+        RCU_CFG1 |= (RCU_PREDV0SRC_CKPLL1 | RCU_PLL1_MUL8 | RCU_PREDV1_DIV5 | RCU_PREDV0_DIV10);
+
+        /* enable PLL1 */
+        RCU_CTL |= RCU_CTL_PLL1EN;
+        /* wait till PLL1 is ready */
+        while((RCU_CTL & RCU_CTL_PLL1STB) == 0){
+        }
+
+    }else if(HXTAL_VALUE==8000000){
+        RCU_CFG1 &= ~(RCU_CFG1_PREDV0SEL | RCU_CFG1_PREDV1 | RCU_CFG1_PLL1MF | RCU_CFG1_PREDV0);
+        RCU_CFG1 |= (RCU_PREDV0SRC_HXTAL | RCU_PREDV0_DIV2 );
+    }
+
+    /* enable PLL */
+    RCU_CTL |= RCU_CTL_PLLEN;
+
+    /* wait until PLL is stable */
+    while(0U == (RCU_CTL & RCU_CTL_PLLSTB)){
+    }
+
+    /* select PLL as system clock */
+    RCU_CFG0 &= ~RCU_CFG0_SCS;
+    RCU_CFG0 |= RCU_CKSYSSRC_PLL;
+
+    /* wait until PLL is selected as system clock */
+    while(0U == (RCU_CFG0 & RCU_SCSS_PLL)){
+    }
+}
+
+#elif defined (__SYSTEM_CLOCK_96M_PLL_HXTAL)
+/*!
+    \brief      configure the system clock to 96M by PLL which selects HXTAL(MD/HD/XD:8M; CL:25M) as its clock source
+    \param[in]  none
+    \param[out] none
+    \retval     none
+*/
+static void system_clock_96m_hxtal(void)
+{
+    uint32_t timeout = 0U;
+    uint32_t stab_flag = 0U;
+
+    /* enable HXTAL */
+    RCU_CTL |= RCU_CTL_HXTALEN;
+
+    /* wait until HXTAL is stable or the startup time is longer than HXTAL_STARTUP_TIMEOUT */
+    do{
+        timeout++;
+        stab_flag = (RCU_CTL & RCU_CTL_HXTALSTB);
+    }while((0U == stab_flag) && (HXTAL_STARTUP_TIMEOUT != timeout));
+
+    /* if fail */
+    if(0U == (RCU_CTL & RCU_CTL_HXTALSTB)){
+        while(1){
+        }
+    }
+
+    /* HXTAL is stable */
+    /* AHB = SYSCLK */
+    RCU_CFG0 |= RCU_AHB_CKSYS_DIV1;
+    /* APB2 = AHB/1 */
+    RCU_CFG0 |= RCU_APB2_CKAHB_DIV1;
+    /* APB1 = AHB/2 */
+    RCU_CFG0 |= RCU_APB1_CKAHB_DIV2;
+
+    if(HXTAL_VALUE==25000000){
+
+        /* CK_PLL = (CK_PREDIV0) * 24 = 96 MHz */
+        RCU_CFG0 &= ~(RCU_CFG0_PLLMF | RCU_CFG0_PLLMF_4);
+        RCU_CFG0 |= (RCU_PLLSRC_HXTAL | RCU_PLL_MUL24);
+
+        /* CK_PREDIV0 = (CK_HXTAL)/5 *8 /10 = 4 MHz */
+        RCU_CFG1 &= ~(RCU_CFG1_PREDV0SEL | RCU_CFG1_PLL1MF | RCU_CFG1_PREDV1 | RCU_CFG1_PREDV0);
+        RCU_CFG1 |= (RCU_PREDV0SRC_CKPLL1 | RCU_PLL1_MUL8 | RCU_PREDV1_DIV5 | RCU_PREDV0_DIV10);
+        /* enable PLL1 */
+        RCU_CTL |= RCU_CTL_PLL1EN;
+        /* wait till PLL1 is ready */
+        while((RCU_CTL & RCU_CTL_PLL1STB) == 0){
+        }
+
+    }else if(HXTAL_VALUE==8000000){
+        /* CK_PLL = (CK_PREDIV0) * 24 = 96 MHz */
+        RCU_CFG0 &= ~(RCU_CFG0_PLLMF | RCU_CFG0_PLLMF_4);
+        RCU_CFG0 |= (RCU_PLLSRC_HXTAL | RCU_PLL_MUL24);
+
+        RCU_CFG1 &= ~(RCU_CFG1_PREDV0SEL | RCU_CFG1_PREDV1 | RCU_CFG1_PLL1MF | RCU_CFG1_PREDV0);
+        RCU_CFG1 |= (RCU_PREDV0SRC_HXTAL | RCU_PREDV0_DIV2 );
+    }
+
+    /* enable PLL */
+    RCU_CTL |= RCU_CTL_PLLEN;
+
+    /* wait until PLL is stable */
+    while(0U == (RCU_CTL & RCU_CTL_PLLSTB)){
+    }
+
+    /* select PLL as system clock */
+    RCU_CFG0 &= ~RCU_CFG0_SCS;
+    RCU_CFG0 |= RCU_CKSYSSRC_PLL;
+
+    /* wait until PLL is selected as system clock */
+    while(0U == (RCU_CFG0 & RCU_SCSS_PLL)){
+    }
+}
+
+#endif
+
+/**
+ * \defgroup  NMSIS_Core_IntExcNMI_Handling   Interrupt and Exception and NMI Handling
+ * \brief Functions for interrupt, exception and nmi handle available in system_<device>.c.
+ * \details
+ * Nuclei provide a template for interrupt, exception and NMI handling. Silicon Vendor could adapat according
+ * to their requirement. Silicon vendor could implement interface for different exception code and
+ * replace current implementation.
+ *
+ * @{
+ */
+/** \brief Max exception handler number, don't include the NMI(0xFFF) one */
+#define MAX_SYSTEM_EXCEPTION_NUM        12
+/**
+ * \brief      Store the exception handlers for each exception ID
+ * \note
+ * - This SystemExceptionHandlers are used to store all the handlers for all
+ * the exception codes Nuclei N/NX core provided.
+ * - Exception code 0 - 11, totally 12 exceptions are mapped to SystemExceptionHandlers[0:11]
+ * - Exception for NMI is also re-routed to exception handling(exception code 0xFFF) in startup code configuration, the handler itself is mapped to SystemExceptionHandlers[MAX_SYSTEM_EXCEPTION_NUM]
+ */
+static unsigned long SystemExceptionHandlers[MAX_SYSTEM_EXCEPTION_NUM + 1];
+
+/**
+ * \brief      Exception Handler Function Typedef
+ * \note
+ * This typedef is only used internal in this system_gd32vf103.c file.
+ * It is used to do type conversion for registered exception handler before calling it.
+ */
+typedef void (*EXC_HANDLER)(unsigned long mcause, unsigned long sp);
+
+/**
+ * \brief      System Default Exception Handler
+ * \details
+ * This function provided a default exception and NMI handling code for all exception ids.
+ * By default, It will just print some information for debug, Vendor can customize it according to its requirements.
+ */
+static void system_default_exception_handler(unsigned long mcause, unsigned long sp)
+{
+    /* TODO: Uncomment this if you have implement printf function */
+    /*printf("MCAUSE: 0x%lx\r\n", mcause);
+    printf("MEPC  : 0x%lx\r\n", __RV_CSR_READ(CSR_MEPC));
+    printf("MTVAL : 0x%lx\r\n", __RV_CSR_READ(CSR_MBADADDR));*/
+    while (1);
+}
+
+/**
+ * \brief      Initialize all the default core exception handlers
+ * \details
+ * The core exception handler for each exception id will be initialized to \ref system_default_exception_handler.
+ * \note
+ * Called in \ref _init function, used to initialize default exception handlers for all exception IDs
+ */
+static void Exception_Init(void)
+{
+    for (int i = 0; i < MAX_SYSTEM_EXCEPTION_NUM + 1; i++) {
+        SystemExceptionHandlers[i] = (unsigned long)system_default_exception_handler;
+    }
+}
+
+/**
+ * \brief       Register an exception handler for exception code EXCn
+ * \details
+ * * For EXCn < \ref MAX_SYSTEM_EXCEPTION_NUM, it will be registered into SystemExceptionHandlers[EXCn-1].
+ * * For EXCn == NMI_EXCn, it will be registered into SystemExceptionHandlers[MAX_SYSTEM_EXCEPTION_NUM].
+ * \param   EXCn    See \ref EXCn_Type
+ * \param   exc_handler     The exception handler for this exception code EXCn
+ */
+void Exception_Register_EXC(uint32_t EXCn, unsigned long exc_handler)
+{
+    if ((EXCn < MAX_SYSTEM_EXCEPTION_NUM) && (EXCn != 0)) {
+        SystemExceptionHandlers[EXCn] = exc_handler;
+    } else if (EXCn == NMI_EXCn) {
+        SystemExceptionHandlers[MAX_SYSTEM_EXCEPTION_NUM] = exc_handler;
+    }
+}
+
+/**
+ * \brief       Get current exception handler for exception code EXCn
+ * \details
+ * * For EXCn < \ref MAX_SYSTEM_EXCEPTION_NUM, it will return SystemExceptionHandlers[EXCn-1].
+ * * For EXCn == NMI_EXCn, it will return SystemExceptionHandlers[MAX_SYSTEM_EXCEPTION_NUM].
+ * \param   EXCn    See \ref EXCn_Type
+ * \return  Current exception handler for exception code EXCn, if not found, return 0.
+ */
+unsigned long Exception_Get_EXC(uint32_t EXCn)
+{
+    if ((EXCn < MAX_SYSTEM_EXCEPTION_NUM) && (EXCn != 0)) {
+        return SystemExceptionHandlers[EXCn];
+    } else if (EXCn == NMI_EXCn) {
+        return SystemExceptionHandlers[MAX_SYSTEM_EXCEPTION_NUM];
+    } else {
+        return 0;
+    }
+}
+
+/**
+ * \brief      Common NMI and Exception handler entry
+ * \details
+ * This function provided a command entry for NMI and exception. Silicon Vendor could modify
+ * this template implementation according to requirement.
+ * \remarks
+ * - RISCV provided common entry for all types of exception. This is proposed code template
+ *   for exception entry function, Silicon Vendor could modify the implementation.
+ * - For the core_exception_handler template, we provided exception register function \ref Exception_Register_EXC
+ *   which can help developer to register your exception handler for specific exception number.
+ */
+uint32_t core_exception_handler(unsigned long mcause, unsigned long sp)
+{
+    uint32_t EXCn = (uint32_t)(mcause & 0X00000fff);
+    EXC_HANDLER exc_handler;
+
+    if ((EXCn < MAX_SYSTEM_EXCEPTION_NUM) && (EXCn > 0)) {
+        exc_handler = (EXC_HANDLER)SystemExceptionHandlers[EXCn];
+    } else if (EXCn == NMI_EXCn) {
+        exc_handler = (EXC_HANDLER)SystemExceptionHandlers[MAX_SYSTEM_EXCEPTION_NUM];
+    } else {
+        exc_handler = (EXC_HANDLER)system_default_exception_handler;
+    }
+    if (exc_handler != NULL) {
+        exc_handler(mcause, sp);
+    }
+    return 0;
+}
+/** @} */ /* End of Doxygen Group NMSIS_Core_ExceptionAndNMI */
+
+/**
+ * \brief initialize eclic config
+ * \details
+ * Eclic need initialize after boot up, Vendor could also change the initialization
+ * configuration.
+ */
+void ECLIC_Init(void)
+{
+    /* TODO: Add your own initialization code here. This function will be called by main */
+    ECLIC_SetMth(0);
+    ECLIC_SetCfgNlbits(__ECLIC_INTCTLBITS);
+}
+
+/**
+ * \brief  Initialize a specific IRQ and register the handler
+ * \details
+ * This function set vector mode, trigger mode and polarity, interrupt level and priority,
+ * assign handler for specific IRQn.
+ * \param [in]  IRQn        NMI interrupt handler address
+ * \param [in]  shv         \ref ECLIC_NON_VECTOR_INTERRUPT means non-vector mode, and \ref ECLIC_VECTOR_INTERRUPT is vector mode
+ * \param [in]  trig_mode   see \ref ECLIC_TRIGGER_Type
+ * \param [in]  lvl         interupt level
+ * \param [in]  priority    interrupt priority
+ * \param [in]  handler     interrupt handler, if NULL, handler will not be installed
+ * \return       -1 means invalid input parameter. 0 means successful.
+ * \remarks
+ * - This function use to configure specific eclic interrupt and register its interrupt handler and enable its interrupt.
+ * - If the vector table is placed in read-only section(FLASHXIP mode), handler could not be installed
+ */
+int32_t ECLIC_Register_IRQ(IRQn_Type IRQn, uint8_t shv, ECLIC_TRIGGER_Type trig_mode, uint8_t lvl, uint8_t priority, void* handler)
+{
+    if ((IRQn > SOC_INT_MAX) || (shv > ECLIC_VECTOR_INTERRUPT) \
+        || (trig_mode > ECLIC_NEGTIVE_EDGE_TRIGGER)) {
+        return -1;
+    }
+
+    /* set interrupt vector mode */
+    ECLIC_SetShvIRQ(IRQn, shv);
+    /* set interrupt trigger mode and polarity */
+    ECLIC_SetTrigIRQ(IRQn, trig_mode);
+    /* set interrupt level */
+    ECLIC_SetLevelIRQ(IRQn, lvl);
+    /* set interrupt priority */
+    ECLIC_SetPriorityIRQ(IRQn, priority);
+    if (handler != NULL) {
+        /* set interrupt handler entry to vector table */
+        ECLIC_SetVector(IRQn, (rv_csr_t)handler);
+    }
+    /* enable interrupt */
+    ECLIC_EnableIRQ(IRQn);
+    return 0;
+}
+/** @} */ /* End of Doxygen Group NMSIS_Core_ExceptionAndNMI */
+
+/**
+ * \brief early init function before main
+ * \details
+ * This function is executed right before main function.
+ * For RISC-V gnu toolchain, _init function might not be called
+ * by __libc_init_array function, so we defined a new function
+ * to do initialization
+ */
+void _premain_init(void)
+{
+    /* Initialize exception default handlers */
+    Exception_Init();
+    /* ECLIC initialization, mainly MTH and NLBIT */
+    ECLIC_Init();
+}
+
+/**
+ * \brief finish function after main
+ * \param [in]  status     status code return from main
+ * \details
+ * This function is executed right after main function.
+ * For RISC-V gnu toolchain, _fini function might not be called
+ * by __libc_fini_array function, so we defined a new function
+ * to do initialization
+ */
+void _postmain_fini(int status)
+{
+    /* TODO: Add your own finishing code here, called after main */
+}
+
+/**
+ * \brief _init function called in __libc_init_array()
+ * \details
+ * This `__libc_init_array()` function is called during startup code,
+ * user need to implement this function, otherwise when link it will
+ * error init.c:(.text.__libc_init_array+0x26): undefined reference to `_init'
+ * \note
+ * Please use \ref _premain_init function now
+ */
+void _init(void)
+{
+    /* Don't put any code here, please use _premain_init now */
+}
+
+/**
+ * \brief _fini function called in __libc_fini_array()
+ * \details
+ * This `__libc_fini_array()` function is called when exit main.
+ * user need to implement this function, otherwise when link it will
+ * error fini.c:(.text.__libc_fini_array+0x28): undefined reference to `_fini'
+ * \note
+ * Please use \ref _postmain_fini function now
+ */
+void _fini(void)
+{
+    /* Don't put any code here, please use _postmain_fini now */
+}
+
+/** @} */ /* End of Doxygen Group NMSIS_Core_SystemAndClock */

hw/mcu/gd/nuclei-sdk

@@ -0,0 +1 @@
+Subproject commit 7eb7bfa9ea4fbeacfafe1d5f77d5a0e6ed3922e7

src/class/audio/audio_device.c

@@ -89,7 +89,8 @@
     (CFG_TUSB_MCU == OPT_MCU_STM32L4 && defined(STM32L4_SYNOPSYS)) || \
     CFG_TUSB_MCU == OPT_MCU_RX63X                                 || \
     CFG_TUSB_MCU == OPT_MCU_RX65X                                 || \
-    CFG_TUSB_MCU == OPT_MCU_RX72N
+    CFG_TUSB_MCU == OPT_MCU_RX72N                                 || \
+    CFG_TUSB_MCU == OPT_MCU_GD32VF103
 #define  USE_LINEAR_BUFFER     0
 #else
 #define  USE_LINEAR_BUFFER     1

src/device/dcd_attr.h

@@ -147,6 +147,10 @@
 //#elif TU_CHECK_MCU(MM32F327X)
 //  #define DCD_ATTR_ENDPOINT_MAX not known yet
 
+//------------- GigaDevice -------------//
+#elif TU_CHECK_MCU(GD32VF103)
+  #define DCD_ATTR_ENDPOINT_MAX   4
+
 #else
   #warning "DCD_ATTR_ENDPOINT_MAX is not defined for this MCU, default to 8"
   #define DCD_ATTR_ENDPOINT_MAX   8

src/portable/st/synopsys/dcd_synopsys.c

@@ -51,7 +51,8 @@
        CFG_TUSB_MCU == OPT_MCU_STM32F4                               || \
        CFG_TUSB_MCU == OPT_MCU_STM32F7                               || \
        CFG_TUSB_MCU == OPT_MCU_STM32H7                               || \
-      (CFG_TUSB_MCU == OPT_MCU_STM32L4 && defined(STM32L4_SYNOPSYS))    \
+      (CFG_TUSB_MCU == OPT_MCU_STM32L4 && defined(STM32L4_SYNOPSYS)  || \
+       CFG_TUSB_MCU == OPT_MCU_GD32VF103 )                           \
     )
 
 // EP_MAX       : Max number of bi-directional endpoints including EP0
@@ -92,6 +93,30 @@
 #define EP_MAX_FS       6
 #define EP_FIFO_SIZE_FS 1280
 
+#elif CFG_TUSB_MCU == OPT_MCU_GD32VF103
+#include "synopsys_common.h"
+
+// These numbers are the same for the whole GD32VF103 family.
+#define OTG_FS_IRQn     86
+#define EP_MAX_FS       4
+#define EP_FIFO_SIZE_FS 1280
+
+// The GD32VF103 is a RISC-V MCU, which implements the ECLIC Core-Local
+// Interrupt Controller by Nuclei. It is nearly API compatible to the
+// NVIC used by ARM MCUs.
+#define ECLIC_INTERRUPT_ENABLE_BASE 0xD2001001UL
+
+#define NVIC_EnableIRQ __eclic_enable_interrupt
+#define NVIC_DisableIRQ __eclic_disable_interrupt
+
+static inline void __eclic_enable_interrupt (uint32_t irq) {
+  *(volatile uint8_t*)(ECLIC_INTERRUPT_ENABLE_BASE + (irq * 4)) = 1;
+}
+
+static inline void __eclic_disable_interrupt (uint32_t irq){
+  *(volatile uint8_t*)(ECLIC_INTERRUPT_ENABLE_BASE + (irq * 4)) = 0;
+}
+
 #else
 #error "Unsupported MCUs"
 #endif
@@ -282,6 +307,8 @@ static void set_turnaround(USB_OTG_GlobalTypeDef * usb_otg, tusb_speed_t speed)
     // Turnaround timeout depends on the MCU clock
     uint32_t turnaround;
 
+    TU_LOG_INT(2, SystemCoreClock);
+
     if ( SystemCoreClock >= 32000000U )
       turnaround = 0x6U;
     else if ( SystemCoreClock >= 27500000U )
@@ -625,6 +652,8 @@ bool dcd_edpt_open (uint8_t rhport, tusb_desc_endpoint_t const * desc_edpt)
 
     _allocated_fifo_words_tx += fifo_size;
 
+    TU_LOG(2, "    Allocated %u bytes at offset %u", fifo_size*4, EP_FIFO_SIZE-_allocated_fifo_words_tx*4);
+
     // DIEPTXF starts at FIFO #1.
     // Both TXFD and TXSA are in unit of 32-bit words.
     usb_otg->DIEPTXF[epnum - 1] = (fifo_size << USB_OTG_DIEPTXF_INEPTXFD_Pos) | (EP_FIFO_SIZE/4 - _allocated_fifo_words_tx);

src/tusb_option.h

@@ -122,6 +122,9 @@
 // Mind Motion
 #define OPT_MCU_MM32F327X        1500 ///< Mind Motion MM32F327
 
+// GigaDevice
+#define OPT_MCU_GD32VF103        1600 ///< GigaDevice GD32VF103
+
 //--------------------------------------------------------------------+
 // Supported OS
 //--------------------------------------------------------------------+