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third_party/tinyusb/hw/bsp/stm32f3/family.c

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+/*
+ * 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.
+ */
+
+/* metadata:
+   manufacturer: STMicroelectronics
+*/
+
+#include "stm32f3xx_hal.h"
+#include "bsp/board_api.h"
+#include "common/tusb_fifo.h"
+#include "board.h"
+
+#ifdef UART_ID
+  #if UART_ID == 1
+    #define USARTn            USART1
+    #define USARTn_IRQn       USART1_IRQn
+    #define USARTn_IRQHandler USART1_IRQHandler
+    #define UARTn_CLK_ENABLE  __HAL_RCC_USART1_CLK_ENABLE
+  #elif UART_ID == 2
+    #define USARTn            USART2
+    #define USARTn_IRQn       USART2_IRQn
+    #define USARTn_IRQHandler USART2_IRQHandler
+    #define UARTn_CLK_ENABLE  __HAL_RCC_USART2_CLK_ENABLE
+  #elif UART_ID == 3
+    #define USARTn            USART3
+    #define USARTn_IRQn       USART3_IRQn
+    #define USARTn_IRQHandler USART3_IRQHandler
+    #define UARTn_CLK_ENABLE  __HAL_RCC_USART3_CLK_ENABLE
+  #endif
+#endif
+
+//--------------------------------------------------------------------+
+// Forward USB interrupt events to TinyUSB IRQ Handler
+//--------------------------------------------------------------------+
+
+// USB defaults to using interrupts 19, 20 and 42, however, this BSP sets the
+// SYSCFG_CFGR1.USB_IT_RMP bit remapping interrupts to 74, 75 and 76.
+
+// FIXME: Do all three need to be handled, or just the LP one?
+// USB high-priority interrupt (Channel 74): Triggered only by a correct
+// transfer event for isochronous and double-buffer bulk transfer to reach
+// the highest possible transfer rate.
+void USB_HP_IRQHandler(void) {
+  tud_int_handler(0);
+}
+
+// USB low-priority interrupt (Channel 75): Triggered by all USB events
+// (Correct transfer, USB reset, etc.). The firmware has to check the
+// interrupt source before serving the interrupt.
+void USB_LP_IRQHandler(void) {
+  tud_int_handler(0);
+}
+
+// USB wakeup interrupt (Channel 76): Triggered by the wakeup event from the USB
+// Suspend mode.
+// Not enabled by the fsdev driver (see fsdev_stm32.h); restore for STOP-mode wakeup.
+//void USBWakeUp_RMP_IRQHandler(void) {
+//  tud_int_handler(0);
+//}
+
+//--------------------------------------------------------------------+
+// MACRO TYPEDEF CONSTANT ENUM
+//--------------------------------------------------------------------+
+#ifdef UART_ID
+static UART_HandleTypeDef UartHandle = {
+  .Instance = USARTn,
+  .Init = {
+    .BaudRate     = CFG_BOARD_UART_BAUDRATE,
+    .WordLength   = UART_WORDLENGTH_8B,
+    .StopBits     = UART_STOPBITS_1,
+    .Parity       = UART_PARITY_NONE,
+    .HwFlowCtl    = UART_HWCONTROL_NONE,
+    .Mode         = UART_MODE_TX_RX,
+    .OverSampling = UART_OVERSAMPLING_16,
+  }
+};
+
+// RX ring buffer via RXNE interrupt
+static uint8_t   uart_rx_ff_buf[32];
+static tu_fifo_t uart_rx_ff;
+
+// F3 uses new USART IP (ISR/RDR/TDR/ICR) — same as F7
+void USARTn_IRQHandler(void) {
+  uint32_t isr = USARTn->ISR;
+  if (isr & USART_ISR_RXNE) {
+    uint8_t byte = (uint8_t) USARTn->RDR;
+    tu_fifo_write(&uart_rx_ff, &byte);
+  }
+  if (isr & (USART_ISR_ORE | USART_ISR_FE | USART_ISR_NE | USART_ISR_PE)) {
+    USARTn->ICR = USART_ICR_ORECF | USART_ICR_FECF | USART_ICR_NCF | USART_ICR_PECF;
+  }
+}
+#endif
+
+//--------------------------------------------------------------------+
+// MACRO TYPEDEF CONSTANT ENUM
+//--------------------------------------------------------------------+
+
+
+void board_init(void) {
+  SystemClock_Config();
+
+#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 from running before scheduler start
+  SysTick->CTRL &= ~1U;
+#endif
+
+  // Remap the USB interrupts
+  __HAL_RCC_SYSCFG_CLK_ENABLE();
+  __HAL_REMAPINTERRUPT_USB_ENABLE();
+
+  // LED
+  __HAL_RCC_GPIOE_CLK_ENABLE();
+  GPIO_InitTypeDef GPIO_InitStruct;
+  GPIO_InitStruct.Pin = LED_PIN;
+  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
+  GPIO_InitStruct.Pull = GPIO_PULLUP;
+  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
+  HAL_GPIO_Init(LED_PORT, &GPIO_InitStruct);
+
+  // Button
+  __HAL_RCC_GPIOA_CLK_ENABLE();
+  GPIO_InitStruct.Pin = BUTTON_PIN;
+  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
+  GPIO_InitStruct.Pull = GPIO_PULLDOWN;
+  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
+  HAL_GPIO_Init(BUTTON_PORT, &GPIO_InitStruct);
+
+  /* Configure USB DM and DP pins */
+  __HAL_RCC_GPIOA_CLK_ENABLE();
+  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_HIGH;
+  GPIO_InitStruct.Alternate = GPIO_AF14_USB;
+  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
+
+  // Enable USB clock
+  __HAL_RCC_USB_CLK_ENABLE();
+
+#ifdef UART_ID
+  HAL_UART_Init(&UartHandle);
+  tu_fifo_config(&uart_rx_ff, uart_rx_ff_buf, sizeof(uart_rx_ff_buf), false);
+  USARTn->CR1 |= USART_CR1_RXNEIE;
+  NVIC_SetPriority(USARTn_IRQn, (1 << __NVIC_PRIO_BITS) - 1);
+  NVIC_EnableIRQ(USARTn_IRQn);
+#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) {
+#ifdef UART_ID
+  return (int) tu_fifo_read_n(&uart_rx_ff, buf, (uint16_t) len);
+#else
+  (void) buf; (void) len;
+  return 0;
+#endif
+}
+
+int board_uart_write(void const* buf, int len) {
+#ifdef UART_ID
+  const uint8_t *p = (const uint8_t *) buf;
+  int count = 0;
+  while (count < len) {
+    if (__HAL_UART_GET_FLAG(&UartHandle, UART_FLAG_TXE)) {
+      UartHandle.Instance->TDR = p[count];
+      count++;
+    } else {
+      break;
+    }
+  }
+  return count;
+#else
+  (void) buf; (void) len;
+  return -1;
+#endif
+}
+
+#if CFG_TUSB_OS == OPT_OS_NONE
+volatile uint32_t system_ticks = 0;
+
+void SysTick_Handler(void) {
+  HAL_IncTick();
+  system_ticks++;
+}
+
+uint32_t tusb_time_millis_api(void) {
+  return system_ticks;
+}
+
+#endif
+
+void HardFault_Handler(void) {
+  asm("bkpt 0");
+}
+
+// Required by __libc_init_array in startup code if we are compiling using
+// -nostdlib/-nostartfiles.
+void _init(void) {
+
+}