diff options
Diffstat (limited to 'tinyusb/hw/bsp/stm32l0538disco/stm32l0538disco.c')
| -rwxr-xr-x | tinyusb/hw/bsp/stm32l0538disco/stm32l0538disco.c | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/tinyusb/hw/bsp/stm32l0538disco/stm32l0538disco.c b/tinyusb/hw/bsp/stm32l0538disco/stm32l0538disco.c new file mode 100755 index 00000000..f0f1d028 --- /dev/null +++ b/tinyusb/hw/bsp/stm32l0538disco/stm32l0538disco.c @@ -0,0 +1,205 @@ +/* + * 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" + +//--------------------------------------------------------------------+ +// Forward USB interrupt events to TinyUSB IRQ Handler +//--------------------------------------------------------------------+ +void USB_IRQHandler(void) +{ + tud_int_handler(0); +} + +//--------------------------------------------------------------------+ +// MACRO TYPEDEF CONSTANT ENUM +//--------------------------------------------------------------------+ +#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_FREQ_HIGH; + 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_FREQ_HIGH; + 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) +{ + +} |