196 lines
6.3 KiB
C
196 lines
6.3 KiB
C
/*
|
|
* 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.
|
|
*/
|
|
|
|
#include "../board.h"
|
|
|
|
#include "stm32l0xx_hal.h"
|
|
|
|
#define LED_PORT GPIOA
|
|
#define LED_PIN GPIO_PIN_5
|
|
#define LED_STATE_ON 1
|
|
|
|
#define BUTTON_PORT GPIOA
|
|
#define BUTTON_PIN GPIO_PIN_0
|
|
#define BUTTON_STATE_ACTIVE 1
|
|
|
|
/**
|
|
* @brief System Clock Configuration
|
|
* The system Clock is configured as follow:
|
|
* HSI48 used as USB clock source
|
|
* - System Clock source = HSI
|
|
* - HSI Frequency(Hz) = 16000000
|
|
* - SYSCLK(Hz) = 16000000
|
|
* - HCLK(Hz) = 16000000
|
|
* - AHB Prescaler = 1
|
|
* - APB1 Prescaler = 1
|
|
* - APB2 Prescaler = 1
|
|
* - Flash Latency(WS) = 0
|
|
* - Main regulator output voltage = Scale1 mode
|
|
* @param None
|
|
* @retval None
|
|
*/
|
|
static void SystemClock_Config(void)
|
|
{
|
|
RCC_ClkInitTypeDef RCC_ClkInitStruct;
|
|
RCC_OscInitTypeDef RCC_OscInitStruct;
|
|
RCC_PeriphCLKInitTypeDef PeriphClkInitStruct;
|
|
static RCC_CRSInitTypeDef RCC_CRSInitStruct;
|
|
|
|
/* Enable HSI Oscillator to be used as System clock source
|
|
Enable HSI48 Oscillator to be used as USB clock source */
|
|
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSI48;
|
|
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
|
|
RCC_OscInitStruct.HSI48State = RCC_HSI48_ON;
|
|
HAL_RCC_OscConfig(&RCC_OscInitStruct);
|
|
|
|
/* Select HSI48 as USB clock source */
|
|
PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_USB;
|
|
PeriphClkInitStruct.UsbClockSelection = RCC_USBCLKSOURCE_HSI48;
|
|
HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct);
|
|
|
|
/* Select HSI as system clock source and configure the HCLK, PCLK1 and PCLK2
|
|
clock dividers */
|
|
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
|
|
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
|
|
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
|
|
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
|
|
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
|
|
HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0);
|
|
|
|
/*Configure the clock recovery system (CRS)**********************************/
|
|
|
|
/*Enable CRS Clock*/
|
|
__HAL_RCC_CRS_CLK_ENABLE();
|
|
|
|
/* Default Synchro Signal division factor (not divided) */
|
|
RCC_CRSInitStruct.Prescaler = RCC_CRS_SYNC_DIV1;
|
|
/* Set the SYNCSRC[1:0] bits according to CRS_Source value */
|
|
RCC_CRSInitStruct.Source = RCC_CRS_SYNC_SOURCE_USB;
|
|
/* HSI48 is synchronized with USB SOF at 1KHz rate */
|
|
RCC_CRSInitStruct.ReloadValue = __HAL_RCC_CRS_RELOADVALUE_CALCULATE(48000000, 1000);
|
|
RCC_CRSInitStruct.ErrorLimitValue = RCC_CRS_ERRORLIMIT_DEFAULT;
|
|
/* Set the TRIM[5:0] to the default value*/
|
|
RCC_CRSInitStruct.HSI48CalibrationValue = 0x20;
|
|
/* Start automatic synchronization */
|
|
HAL_RCCEx_CRSConfig (&RCC_CRSInitStruct);
|
|
}
|
|
|
|
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
|
|
// If freeRTOS is used, IRQ priority is limit by max syscall ( smaller is higher )
|
|
//NVIC_SetPriority(USB0_IRQn, configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY );
|
|
#endif
|
|
|
|
GPIO_InitTypeDef GPIO_InitStruct;
|
|
|
|
// LED
|
|
__HAL_RCC_GPIOA_CLK_ENABLE();
|
|
GPIO_InitStruct.Pin = LED_PIN;
|
|
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
|
|
GPIO_InitStruct.Pull = GPIO_PULLUP;
|
|
GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
|
|
HAL_GPIO_Init(LED_PORT, &GPIO_InitStruct);
|
|
|
|
board_led_write(false);
|
|
|
|
// 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_FAST;
|
|
HAL_GPIO_Init(BUTTON_PORT, &GPIO_InitStruct);
|
|
|
|
// USB
|
|
/* Configure DM DP Pins */
|
|
__HAL_RCC_GPIOA_CLK_ENABLE();
|
|
GPIO_InitStruct.Pin = (GPIO_PIN_11 | GPIO_PIN_12);
|
|
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
|
|
GPIO_InitStruct.Pull = GPIO_NOPULL;
|
|
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
|
|
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
|
|
|
|
/* Enable USB FS Clock */
|
|
__HAL_RCC_USB_CLK_ENABLE();
|
|
}
|
|
|
|
//--------------------------------------------------------------------+
|
|
// Board porting API
|
|
//--------------------------------------------------------------------+
|
|
|
|
void board_led_write(bool state)
|
|
{
|
|
HAL_GPIO_WritePin(LED_PORT, LED_PIN, state ? LED_STATE_ON : (1-LED_STATE_ON));
|
|
}
|
|
|
|
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)
|
|
{
|
|
(void) buf; (void) len;
|
|
return 0;
|
|
}
|
|
|
|
int board_uart_write(void const * buf, int len)
|
|
{
|
|
(void) buf; (void) len;
|
|
return 0;
|
|
}
|
|
|
|
#if CFG_TUSB_OS == OPT_OS_NONE
|
|
volatile uint32_t system_ticks = 0;
|
|
void SysTick_Handler (void)
|
|
{
|
|
system_ticks++;
|
|
}
|
|
|
|
uint32_t board_millis(void)
|
|
{
|
|
return system_ticks;
|
|
}
|
|
#endif
|
|
|
|
void HardFault_Handler (void)
|
|
{
|
|
asm("bkpt");
|
|
}
|
|
|
|
// Required by __libc_init_array in startup code if we are compiling using
|
|
// -nostdlib/-nostartfiles.
|
|
void _init(void)
|
|
{
|
|
|
|
}
|