PICO: Adding tinyUSB library

lib/main/tinyUSB/hw/bsp/stm32c0/family.c

@@ -0,0 +1,199 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019 Ha Thach (tinyusb.org)
+ * Copyright (c) 2023 HiFiPhile
+ *
+ * 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 "stm32c0xx_hal.h"
+#include "bsp/board_api.h"
+#include "board.h"
+
+//--------------------------------------------------------------------+
+// Forward USB interrupt events to TinyUSB IRQ Handler
+//--------------------------------------------------------------------+
+void USB_DRD_FS_IRQHandler(void) {
+  tud_int_handler(0);
+}
+
+// Startup code generated by STM32CubeIDE uses USB_IRQHandler, while
+// stm32c071xx.s from cmsis_device_c0 uses USB_DRD_FS_IRQHandler.
+void USB_IRQHandler(void) {
+  USB_DRD_FS_IRQHandler();
+}
+
+//--------------------------------------------------------------------+
+// MACRO TYPEDEF CONSTANT ENUM
+//--------------------------------------------------------------------+
+UART_HandleTypeDef UartHandle;
+
+void board_init(void) {
+  HAL_Init();
+
+  // Enable the HSIUSB48 48 MHz oscillator.
+  RCC->CR |= RCC_CR_HSIUSB48ON;
+
+  // Wait for HSIUSB48 to be ready.
+  while (!(RCC->CR & RCC_CR_HSIUSB48RDY)) { }
+
+  // Change the SYSCLK source to HSIUSB48.
+  RCC->CFGR = (RCC->CFGR & ~RCC_CFGR_SW) | RCC_SYSCLKSOURCE_HSIUSB48;
+
+  // Wait for the SYSCLK source to change.
+  while ((RCC->CFGR & RCC_CFGR_SWS) >> RCC_CFGR_SWS_Pos != RCC_SYSCLKSOURCE_HSIUSB48) { }
+
+  // Disable HSI48 to save power.
+  RCC->CR &= ~RCC_CR_HSION;
+
+  // Enable peripheral clocks.
+  RCC->APBENR1 = RCC_APBENR1_USBEN | RCC_APBENR1_CRSEN | RCC_APBENR1_USART2EN;
+  RCC->APBENR2 = RCC_APBENR2_USART1EN;
+
+  // Enable all GPIO clocks.
+  RCC->IOPENR = 0x2F;
+
+  // Turn on CRS to make the HSIUSB48 clock more precise when USB is connected.
+  CRS->CR |= CRS_CR_AUTOTRIMEN | CRS_CR_CEN;
+
+#if CFG_TUSB_OS == OPT_OS_NONE
+  // 1ms tick timer
+  SysTick_Config(SystemCoreClock / 1000);
+#elif CFG_TUSB_OS == OPT_OS_FREERTOS
+  // Explicitly disable systick to prevent its ISR runs before scheduler start
+  SysTick->CTRL &= ~1U;
+
+  // If freeRTOS is used, IRQ priority is limit by max syscall ( smaller is higher )
+  NVIC_SetPriority(USB_DRD_FS_IRQn, configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY);
+#endif
+
+  // LED
+  {
+    GPIO_InitTypeDef gpio_init = { 0 };
+    gpio_init.Pin = LED_PIN;
+    gpio_init.Mode = GPIO_MODE_OUTPUT_PP;
+    HAL_GPIO_Init(LED_PORT, &gpio_init);
+    board_led_write(false);
+  }
+
+  // Button
+  {
+    GPIO_InitTypeDef gpio_init = { 0 };
+    gpio_init.Pin = BUTTON_PIN;
+    gpio_init.Mode = GPIO_MODE_INPUT;
+    gpio_init.Pull = BUTTON_STATE_ACTIVE ? GPIO_PULLDOWN : GPIO_PULLUP;
+    HAL_GPIO_Init(BUTTON_PORT, &gpio_init);
+  }
+
+#ifdef UART_DEV
+  // UART
+  {
+    GPIO_InitTypeDef gpio_init = { 0 };
+    gpio_init.Pin = UART_TX_PIN | UART_RX_PIN;
+    gpio_init.Mode = GPIO_MODE_AF_PP;
+    gpio_init.Pull = GPIO_PULLUP;
+    gpio_init.Speed = GPIO_SPEED_FREQ_HIGH;
+    gpio_init.Alternate = UART_GPIO_AF;
+    HAL_GPIO_Init(UART_GPIO_PORT, &gpio_init);
+  }
+
+  UartHandle = (UART_HandleTypeDef){
+    .Instance = UART_DEV,
+    .Init.BaudRate = CFG_BOARD_UART_BAUDRATE,
+    .Init.WordLength = UART_WORDLENGTH_8B,
+    .Init.StopBits = UART_STOPBITS_1,
+    .Init.Parity = UART_PARITY_NONE,
+    .Init.HwFlowCtl = UART_HWCONTROL_NONE,
+    .Init.Mode = UART_MODE_TX_RX,
+    .Init.OverSampling = UART_OVERSAMPLING_16,
+    .AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT
+  };
+  HAL_UART_Init(&UartHandle);
+#endif
+}
+
+//--------------------------------------------------------------------+
+// Board porting API
+//--------------------------------------------------------------------+
+
+void board_led_write(bool state) {
+  GPIO_PinState pin_state = (GPIO_PinState)(state ? LED_STATE_ON : (1 - LED_STATE_ON));
+  HAL_GPIO_WritePin(LED_PORT, LED_PIN, pin_state);
+}
+
+uint32_t board_button_read(void) {
+  return BUTTON_STATE_ACTIVE == HAL_GPIO_ReadPin(BUTTON_PORT, BUTTON_PIN);
+}
+
+size_t board_get_unique_id(uint8_t id[], size_t max_len) {
+  (void) max_len;
+  volatile uint32_t * stm32_uuid = (volatile uint32_t *) UID_BASE;
+  uint32_t* id32 = (uint32_t*) (uintptr_t) id;
+  uint8_t const len = 12;
+
+  id32[0] = stm32_uuid[0];
+  id32[1] = stm32_uuid[1];
+  id32[2] = stm32_uuid[2];
+
+  return len;
+}
+
+int board_uart_read(uint8_t *buf, int len) {
+  (void) buf;
+  (void) len;
+  return 0;
+}
+
+int board_uart_write(void const *buf, int len) {
+#ifdef UART_DEV
+  HAL_UART_Transmit(&UartHandle, (uint8_t*)(uintptr_t) buf, len, 0xffff);
+  return len;
+#else
+  (void) buf;
+  (void) len;
+  (void) UartHandle;
+  return 0;
+#endif
+}
+
+#if CFG_TUSB_OS == OPT_OS_NONE
+volatile uint32_t system_ticks = 0;
+
+void SysTick_Handler(void) {
+  system_ticks++;
+  HAL_IncTick();
+}
+
+uint32_t board_millis(void) {
+  return system_ticks;
+}
+#endif
+
+void HardFault_Handler(void) {
+  __asm("BKPT #0\n");
+}
+
+// Required by __libc_init_array in startup code if we are compiling using
+// -nostdlib/-nostartfiles.
+void _init(void) {
+
+}