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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 "stm32f2xx_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
//--------------------------------------------------------------------+
void OTG_FS_IRQHandler(void) {
tusb_int_handler(0, true);
}
//--------------------------------------------------------------------+
// 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;
// F2 uses old USART IP (SR/DR)
void USARTn_IRQHandler(void) {
uint32_t sr = USARTn->SR;
if (sr & USART_SR_RXNE) {
uint8_t byte = (uint8_t) USARTn->DR;
tu_fifo_write(&uart_rx_ff, &byte);
}
// Reading DR clears RXNE. OR is cleared by reading SR then DR (already done).
}
#endif
//--------------------------------------------------------------------+
// MACRO TYPEDEF CONSTANT ENUM
//--------------------------------------------------------------------+
// enable all LED, Button, Uart, USB clock
static void all_rcc_clk_enable(void) {
__HAL_RCC_GPIOA_CLK_ENABLE(); // USB D+, D-
__HAL_RCC_GPIOB_CLK_ENABLE(); // LED
__HAL_RCC_GPIOC_CLK_ENABLE(); // Button
}
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
all_rcc_clk_enable();
GPIO_InitTypeDef GPIO_InitStruct;
// LED
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);
board_led_write(false);
// Button
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 DM DP Pins */
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_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF10_OTG_FS;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* Configure VBUS Pin */
GPIO_InitStruct.Pin = GPIO_PIN_9;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* Configure ID pin */
GPIO_InitStruct.Pin = GPIO_PIN_10;
GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Alternate = GPIO_AF10_OTG_FS;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* Enable USB FS Clocks */
__HAL_RCC_USB_OTG_FS_CLK_ENABLE();
#if CFG_TUD_ENABLED
// Enable VBUS sense (B device) via pin PA9
tud_configure_dwc2_t cfg = CFG_TUD_CONFIGURE_DWC2_DEFAULT;
cfg.vbus_sensing = true;
tud_configure(0, TUD_CFGID_DWC2, &cfg);
#endif
#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);
}
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 (UartHandle.Instance->SR & USART_SR_TXE) {
UartHandle.Instance->DR = 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\n");
}
// Required by __libc_init_array in startup code if we are compiling using
// -nostdlib/-nostartfiles.
void _init(void) {
}
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