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Author: code-fiasco

stm32/Adafruit_TinyUSB_stm32.cpp

@@ -0,0 +1,80 @@
+#include "tusb_option.h"
+
+#if (defined(ARDUINO_ARCH_STM32) || defined(ARDUINO_ARCH_ARDUINO_CORE_STM32)) && CFG_TUD_ENABLED
+
+#define USE_HAL_DRIVER
+#include "stm32f4xx_hal.h"
+#include "stm32f4xx_hal_rcc.h"
+#include "Arduino.h"
+#include "arduino/Adafruit_TinyUSB_API.h"
+#include "tusb.h"
+
+//--------------------------------------------------------------------+
+// Forward USB interrupt events to TinyUSB IRQ Handler
+//--------------------------------------------------------------------+
+extern "C" {
+
+void OTG_FS_IRQHandler(void)
+{
+    tud_int_handler(0);
+}
+
+void yield(void)
+{
+    tud_task();
+    if (tud_cdc_connected()) {
+        tud_cdc_write_flush();
+    }
+}
+
+} // extern "C"
+
+//--------------------------------------------------------------------+
+// Porting API
+//--------------------------------------------------------------------+
+void TinyUSB_Port_InitDevice(uint8_t rhport)
+{
+    (void) rhport;
+
+    // Enable clocks FIRST
+    __HAL_RCC_GPIOA_CLK_ENABLE();
+    __HAL_RCC_USB_OTG_FS_CLK_ENABLE();
+    
+    // Configure USB pins (PA11 = DM, PA12 = DP)
+    GPIO_InitTypeDef GPIO_InitStruct = {};
+    GPIO_InitStruct.Pin = GPIO_PIN_11 | GPIO_PIN_12;
+    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
+    GPIO_InitStruct.Pull = GPIO_NOPULL;
+    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
+    GPIO_InitStruct.Alternate = GPIO_AF10_OTG_FS;
+    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
+    
+    // Enable USB IRQ
+    NVIC_SetPriority(OTG_FS_IRQn, 0);
+    NVIC_EnableIRQ(OTG_FS_IRQn);
+    
+    // Disable VBUS sensing (we're bus-powered, don't need it)
+    USB_OTG_FS->GCCFG |= USB_OTG_GCCFG_NOVBUSSENS;
+    USB_OTG_FS->GCCFG &= ~USB_OTG_GCCFG_VBUSBSEN;
+    USB_OTG_FS->GCCFG &= ~USB_OTG_GCCFG_VBUSASEN;
+
+    // Initialize TinyUSB device stack
+    tud_init(rhport);
+    
+}
+
+void TinyUSB_Port_EnterDFU(void) { 
+    // Optional - implement bootloader entry if needed
+}
+
+uint8_t TinyUSB_Port_GetSerialNumber(uint8_t serial_id[16])
+{
+    volatile uint32_t *uid = (volatile uint32_t *)0x1FFF7A10; // STM32F411 UID base
+    uint32_t *serial_32 = (uint32_t *)serial_id;
+    serial_32[0] = uid[0];
+    serial_32[1] = uid[1];
+    serial_32[2] = uid[2];
+    return 12;
+}
+
+#endif // ARDUINO_ARCH_STM32

stm32/tusb_config_stm32.h

@@ -0,0 +1,41 @@
+#ifndef TUSB_CONFIG_STM32_H_
+#define TUSB_CONFIG_STM32_H_
+
+// USB Port
+#define CFG_TUSB_RHPORT0_MODE  OPT_MODE_DEVICE
+#define CFG_TUSB_RHPORT0_SPEED OPT_FULL_SPEED
+#define CFG_TUSB_RHPORT1_MODE  OPT_MODE_NONE
+
+// MCU / OS
+#define CFG_TUSB_MCU OPT_MCU_STM32F4
+#define CFG_TUSB_OS  OPT_OS_NONE
+
+// Debug
+#ifndef CFG_TUSB_DEBUG
+#define CFG_TUSB_DEBUG 0
+#endif
+
+#define CFG_TUSB_MEM_SECTION
+#define CFG_TUSB_MEM_ALIGN __attribute__((aligned(4)))
+
+// Device stack
+#define CFG_TUD_ENABLED       1
+#define CFG_TUD_ENDPOINT0_SIZE 64
+
+// Classes
+#define CFG_TUD_CDC     1
+#define CFG_TUD_MSC     0
+#define CFG_TUD_HID     1
+#define CFG_TUD_MIDI    1
+#define CFG_TUD_VENDOR  0
+
+// Buffer sizes
+#define CFG_TUD_CDC_RX_BUFSIZE  64
+#define CFG_TUD_CDC_TX_BUFSIZE  64
+#define CFG_TUD_HID_EP_BUFSIZE  64
+#define CFG_TUD_MIDI_RX_BUFSIZE 128
+#define CFG_TUD_MIDI_TX_BUFSIZE 128
+#define CFG_TUD_VENDOR_RX_BUFSIZE 64
+#define CFG_TUD_VENDOR_TX_BUFSIZE 64
+
+#endif