206 lines
6.7 KiB
C
206 lines
6.7 KiB
C
/*
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* The MIT License (MIT)
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*
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* Copyright (c) 2019 Ha Thach (tinyusb.org)
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* This file is part of the TinyUSB stack.
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*/
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#include "../board.h"
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#include "stm32l0xx_hal.h"
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//--------------------------------------------------------------------+
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// Forward USB interrupt events to TinyUSB IRQ Handler
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//--------------------------------------------------------------------+
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void USB_IRQHandler(void)
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{
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tud_int_handler(0);
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}
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//--------------------------------------------------------------------+
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// MACRO TYPEDEF CONSTANT ENUM
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//--------------------------------------------------------------------+
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#define LED_PORT GPIOA
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#define LED_PIN GPIO_PIN_5
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#define LED_STATE_ON 1
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#define BUTTON_PORT GPIOA
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#define BUTTON_PIN GPIO_PIN_0
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#define BUTTON_STATE_ACTIVE 1
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/**
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* @brief System Clock Configuration
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* The system Clock is configured as follow:
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* HSI48 used as USB clock source
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* - System Clock source = HSI
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* - HSI Frequency(Hz) = 16000000
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* - SYSCLK(Hz) = 16000000
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* - HCLK(Hz) = 16000000
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* - AHB Prescaler = 1
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* - APB1 Prescaler = 1
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* - APB2 Prescaler = 1
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* - Flash Latency(WS) = 0
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* - Main regulator output voltage = Scale1 mode
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* @param None
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* @retval None
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*/
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static void SystemClock_Config(void)
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{
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RCC_ClkInitTypeDef RCC_ClkInitStruct;
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RCC_OscInitTypeDef RCC_OscInitStruct;
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RCC_PeriphCLKInitTypeDef PeriphClkInitStruct;
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static RCC_CRSInitTypeDef RCC_CRSInitStruct;
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/* Enable HSI Oscillator to be used as System clock source
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Enable HSI48 Oscillator to be used as USB clock source */
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSI48;
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RCC_OscInitStruct.HSIState = RCC_HSI_ON;
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RCC_OscInitStruct.HSI48State = RCC_HSI48_ON;
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HAL_RCC_OscConfig(&RCC_OscInitStruct);
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/* Select HSI48 as USB clock source */
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PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_USB;
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PeriphClkInitStruct.UsbClockSelection = RCC_USBCLKSOURCE_HSI48;
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HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct);
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/* Select HSI as system clock source and configure the HCLK, PCLK1 and PCLK2
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clock dividers */
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RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
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RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
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RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
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RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
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RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
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HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0);
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/*Configure the clock recovery system (CRS)**********************************/
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/*Enable CRS Clock*/
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__HAL_RCC_CRS_CLK_ENABLE();
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/* Default Synchro Signal division factor (not divided) */
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RCC_CRSInitStruct.Prescaler = RCC_CRS_SYNC_DIV1;
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/* Set the SYNCSRC[1:0] bits according to CRS_Source value */
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RCC_CRSInitStruct.Source = RCC_CRS_SYNC_SOURCE_USB;
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/* HSI48 is synchronized with USB SOF at 1KHz rate */
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RCC_CRSInitStruct.ReloadValue = __HAL_RCC_CRS_RELOADVALUE_CALCULATE(48000000, 1000);
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RCC_CRSInitStruct.ErrorLimitValue = RCC_CRS_ERRORLIMIT_DEFAULT;
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/* Set the TRIM[5:0] to the default value*/
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RCC_CRSInitStruct.HSI48CalibrationValue = 0x20;
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/* Start automatic synchronization */
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HAL_RCCEx_CRSConfig (&RCC_CRSInitStruct);
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}
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void board_init(void)
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{
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SystemClock_Config();
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#if CFG_TUSB_OS == OPT_OS_NONE
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// 1ms tick timer
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SysTick_Config(SystemCoreClock / 1000);
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#elif CFG_TUSB_OS == OPT_OS_FREERTOS
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// If freeRTOS is used, IRQ priority is limit by max syscall ( smaller is higher )
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//NVIC_SetPriority(USB0_IRQn, configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY );
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#endif
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GPIO_InitTypeDef GPIO_InitStruct;
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// LED
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__HAL_RCC_GPIOA_CLK_ENABLE();
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GPIO_InitStruct.Pin = LED_PIN;
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GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
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GPIO_InitStruct.Pull = GPIO_PULLUP;
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
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HAL_GPIO_Init(LED_PORT, &GPIO_InitStruct);
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board_led_write(false);
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// Button
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//__HAL_RCC_GPIOA_CLK_ENABLE();
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GPIO_InitStruct.Pin = BUTTON_PIN;
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GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
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GPIO_InitStruct.Pull = GPIO_PULLDOWN;
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
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HAL_GPIO_Init(BUTTON_PORT, &GPIO_InitStruct);
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// USB
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/* Configure DM DP Pins */
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__HAL_RCC_GPIOA_CLK_ENABLE();
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GPIO_InitStruct.Pin = (GPIO_PIN_11 | GPIO_PIN_12);
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GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
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GPIO_InitStruct.Pull = GPIO_NOPULL;
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
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HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
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/* Enable USB FS Clock */
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__HAL_RCC_USB_CLK_ENABLE();
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}
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//--------------------------------------------------------------------+
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// Board porting API
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//--------------------------------------------------------------------+
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void board_led_write(bool state)
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{
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HAL_GPIO_WritePin(LED_PORT, LED_PIN, state ? LED_STATE_ON : (1-LED_STATE_ON));
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}
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uint32_t board_button_read(void)
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{
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return BUTTON_STATE_ACTIVE == HAL_GPIO_ReadPin(BUTTON_PORT, BUTTON_PIN);
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}
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int board_uart_read(uint8_t* buf, int len)
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{
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(void) buf; (void) len;
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return 0;
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}
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int board_uart_write(void const * buf, int len)
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{
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(void) buf; (void) len;
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return 0;
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}
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#if CFG_TUSB_OS == OPT_OS_NONE
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volatile uint32_t system_ticks = 0;
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void SysTick_Handler (void)
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{
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system_ticks++;
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}
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uint32_t board_millis(void)
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{
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return system_ticks;
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}
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#endif
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void HardFault_Handler (void)
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{
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asm("bkpt");
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}
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// Required by __libc_init_array in startup code if we are compiling using
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// -nostdlib/-nostartfiles.
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void _init(void)
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{
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}
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