text: /************************************************************************************
   * configs/stm32f3discovery/include/board.h
   *
   *   Copyright (C) 2013, 2016 Gregory Nutt. All rights reserved.
   *   Author: Gregory Nutt <gnutt@nuttx.org>
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   * 3. Neither the name NuttX nor the names of its contributors may be
   *    used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
   * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
   * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
   * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
   * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
   * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
   * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   *
   ************************************************************************************/
  
  #ifndef __CONFIG_STM32F3DISCOVERY_INCLUDE_BOARD_H
  #define __CONFIG_STM32F3DISCOVERY_INCLUDE_BOARD_H
  
  /************************************************************************************
   * Included Files
   ************************************************************************************/
  
  #include <nuttx/config.h>
  
  #ifndef __ASSEMBLY__
  # include <stdint.h>
  #endif
  
  #include "stm32_rcc.h"
  #include "stm32.h"
  
  /************************************************************************************
   * Pre-processor Definitions
   ************************************************************************************/
  
  /* Clocking *************************************************************************/
  
  /* HSI - Internal 8 MHz RC Oscillator
   * LSI - 32 KHz RC
   * HSE - On-board crystal frequency is 8MHz
   * LSE - 32.768 kHz
   */
  
  #define STM32_BOARD_XTAL        8000000ul        /* X1 on board */
  
  #define STM32_HSI_FREQUENCY     8000000ul
  #define STM32_LSI_FREQUENCY     40000            /* Between 30kHz and 60kHz */
  #define STM32_HSE_FREQUENCY     STM32_BOARD_XTAL
  #define STM32_LSE_FREQUENCY     32768            /* X2 on board */
  
  /* PLL source is HSE/1, PLL multipler is 9: PLL frequency is 8MHz (XTAL) x 9 = 72MHz */
  
  #define STM32_CFGR_PLLSRC       RCC_CFGR_PLLSRC
  #define STM32_CFGR_PLLXTPRE     0
  #define STM32_CFGR_PLLMUL       RCC_CFGR_PLLMUL_CLKx9
  #define STM32_PLL_FREQUENCY     (9*STM32_BOARD_XTAL)
  
  /* Use the PLL and set the SYSCLK source to be the PLL */
  
  #define STM32_SYSCLK_SW         RCC_CFGR_SW_PLL
  #define STM32_SYSCLK_SWS        RCC_CFGR_SWS_PLL
  #define STM32_SYSCLK_FREQUENCY  STM32_PLL_FREQUENCY
  
  /* AHB clock (HCLK) is SYSCLK (72MHz) */
  
  #define STM32_RCC_CFGR_HPRE     RCC_CFGR_HPRE_SYSCLK
  #define STM32_HCLK_FREQUENCY    STM32_PLL_FREQUENCY
  #define STM32_BOARD_HCLK        STM32_HCLK_FREQUENCY    /* same as above, to satisfy compiler */
  
  /* APB2 clock (PCLK2) is HCLK (72MHz) */
  
  #define STM32_RCC_CFGR_PPRE2    RCC_CFGR_PPRE2_HCLK
  #define STM32_PCLK2_FREQUENCY   STM32_HCLK_FREQUENCY
  #define STM32_APB2_CLKIN        (STM32_PCLK2_FREQUENCY)   /* Timers 1 and 8, 15-17 */
  
  /* APB2 timers 1 and 8, 15-17 will receive PCLK2. */
  
  /* Timers driven from APB2 will be PCLK2 */
  
  #define STM32_APB2_TIM1_CLKIN   (STM32_PCLK2_FREQUENCY)
  #define STM32_APB2_TIM8_CLKIN   (STM32_PCLK2_FREQUENCY)
  #define STM32_APB1_TIM15_CLKIN  (STM32_PCLK2_FREQUENCY)
  #define STM32_APB1_TIM16_CLKIN  (STM32_PCLK2_FREQUENCY)
  #define STM32_APB1_TIM17_CLKIN  (STM32_PCLK2_FREQUENCY)
  
  /* APB1 clock (PCLK1) is HCLK/2 (36MHz) */
  
  #define STM32_RCC_CFGR_PPRE1    RCC_CFGR_PPRE1_HCLKd2
  #define STM32_PCLK1_FREQUENCY   (STM32_HCLK_FREQUENCY/2)
  
  /* APB1 timers 2-7 will be twice PCLK1 */
  
  #define STM32_APB1_TIM2_CLKIN   (2*STM32_PCLK1_FREQUENCY)
  #define STM32_APB1_TIM3_CLKIN   (2*STM32_PCLK1_FREQUENCY)
  #define STM32_APB1_TIM4_CLKIN   (2*STM32_PCLK1_FREQUENCY)
  #define STM32_APB1_TIM6_CLKIN   (2*STM32_PCLK1_FREQUENCY)
  #define STM32_APB1_TIM7_CLKIN   (2*STM32_PCLK1_FREQUENCY)
  
  /* USB divider -- Divide PLL clock by 1.5 */
  
  #define STM32_CFGR_USBPRE       0
  
  
  /* Timer Frequencies, if APBx is set to 1, frequency is same to APBx
   * otherwise frequency is 2xAPBx.
   * Note: TIM1,8 are on APB2, others on APB1
   */
  
  #define BOARD_TIM1_FREQUENCY    STM32_HCLK_FREQUENCY
  #define BOARD_TIM2_FREQUENCY    (STM32_HCLK_FREQUENCY / 2)
  #define BOARD_TIM3_FREQUENCY    (STM32_HCLK_FREQUENCY / 2)
  #define BOARD_TIM4_FREQUENCY    (STM32_HCLK_FREQUENCY / 2)
  #define BOARD_TIM5_FREQUENCY    (STM32_HCLK_FREQUENCY / 2)
  #define BOARD_TIM6_FREQUENCY    (STM32_HCLK_FREQUENCY / 2)
  #define BOARD_TIM7_FREQUENCY    (STM32_HCLK_FREQUENCY / 2)
  #define BOARD_TIM8_FREQUENCY    STM32_HCLK_FREQUENCY
  
  /* LED definitions ******************************************************************/
  /* The STM32F3Discovery board has ten LEDs.  Two of these are controlled by logic on
   * the board and are not available for software control:
   *
   * LD1 PWR:   red LED indicates that the board is powered.
   * LD2 COM:   LD2 default status is red. LD2 turns to green to indicate that
   *            communications are in progress between the PC and the ST-LINK/V2.
   *
   * And eight can be controlled by software:
   *
   * User LD3:  red LED is a user LED connected to the I/O PE9 of the STM32F303VCT6.
   * User LD4:  blue LED is a user LED connected to the I/O PE8 of the STM32F303VCT6.
   * User LD5:  orange LED is a user LED connected to the I/O PE10 of the STM32F303VCT6.
   * User LD6:  green LED is a user LED connected to the I/O PE15 of the STM32F303VCT6.
   * User LD7:  green LED is a user LED connected to the I/O PE11 of the STM32F303VCT6.
   * User LD8:  orange LED is a user LED connected to the I/O PE14 of the STM32F303VCT6.
   * User LD9:  blue LED is a user LED connected to the I/O PE12 of the STM32F303VCT6.
   * User LD10: red LED is a user LED connected to the I/O PE13 of the STM32F303VCT6.
   *
   * If CONFIG_ARCH_LEDS is not defined, then the user can control the LEDs in any
   * way.  The following definitions are used to access individual LEDs.
   */
  
  /* LED index values for use with board_userled() */
  
  #define BOARD_LED1        0 /* User LD3 */
  #define BOARD_LED2        1 /* User LD4 */
  #define BOARD_LED3        2 /* User LD5 */
  #define BOARD_LED4        3 /* User LD6 */
  #define BOARD_LED5        4 /* User LD7 */
  #define BOARD_LED6        5 /* User LD8 */
  #define BOARD_LED7        6 /* User LD9 */
  #define BOARD_LED8        7 /* User LD10 */
  #define BOARD_NLEDS       8
  
  /* LED bits for use with board_userled_all() */
  
  #define BOARD_LED1_BIT    (1 << BOARD_LED1)
  #define BOARD_LED2_BIT    (1 << BOARD_LED2)
  #define BOARD_LED3_BIT    (1 << BOARD_LED3)
  #define BOARD_LED4_BIT    (1 << BOARD_LED4)
  #define BOARD_LED5_BIT    (1 << BOARD_LED5)
  #define BOARD_LED6_BIT    (1 << BOARD_LED6)
  #define BOARD_LED7_BIT    (1 << BOARD_LED7)
  #define BOARD_LED8_BIT    (1 << BOARD_LED8)
  
  /* If CONFIG_ARCH_LEDs is defined, then NuttX will control the 8 LEDs on board the
   * stm32f3discovery.  The following definitions describe how NuttX controls the LEDs:
   *
   *   SYMBOL                Meaning                 LED state
   *                                              Initially all LEDs are OFF
   *   -------------------  -----------------------  ------------- ------------
   *   LED_STARTED          NuttX has been started   LD3 ON
   *   LED_HEAPALLOCATE     Heap has been allocated  LD4 ON
   *   LED_IRQSENABLED      Interrupts enabled       LD4 ON
   *   LED_STACKCREATED     Idle stack created       LD6 ON
   *   LED_INIRQ            In an interrupt          LD7 should glow
   *   LED_SIGNAL           In a signal handler      LD8 might glow
   *   LED_ASSERTION        An assertion failed      LD9 ON while handling the assertion
   *   LED_PANIC            The system has crashed   LD10 Blinking at 2Hz
   *   LED_IDLE             STM32 is is sleep mode   (Optional, not used)
   */
  
  #define LED_STARTED       0
  #define LED_HEAPALLOCATE  1
  #define LED_IRQSENABLED   2
  #define LED_STACKCREATED  3
  #define LED_INIRQ         4
  #define LED_SIGNAL        5
  #define LED_ASSERTION     6
  #define LED_PANIC         7
  
  /* Button definitions ***************************************************************/
  /* The STM32F3Discovery supports two buttons; only one button is controllable by
   * software:
   *
   *   B1 USER: user and wake-up button connected to the I/O PA0 of the STM32F303VCT6.
   *   B2 RESET: pushbutton connected to NRST is used to RESET the STM32F303VCT6.
   */
  
  #define BUTTON_USER        0
  
  #define NUM_BUTTONS        1
  
  #define BUTTON_USER_BIT    (1 << BUTTON_USER)
  
  /* Alternate function pin selections ************************************************/
  
  /* USART
   *
   *  USART1: Hardwired to embedded STLinkV2 hardware debugger
   *    RX (PC5)
   *    TX (PC4)
   *
   *  USART2: Connect to an external UART<->RS232 transceiver for use as console.
   *    RX (PA3)
   *    TX (PA2)
   */
  
  #define GPIO_USART2_RX GPIO_USART2_RX_2
  #define GPIO_USART2_TX GPIO_USART2_TX_2
  
  /* SPI
   *
   *  SPI1: Hardwired to ST L3GD20 MEMS device
   *    MISO (PA6)
   *    MSOI (PA7)
   *    SCK (PA5)
   */
  
  #define GPIO_SPI1_MISO GPIO_SPI1_MISO_1
  #define GPIO_SPI1_MOSI GPIO_SPI1_MOSI_1
  #define GPIO_SPI1_SCK  GPIO_SPI1_SCK_1
  
  /* I2C
   *
   * I2C1: Accessible via expansion headers
   *   SCL (PA15)
   *   SDA (PA14)
   *   SMBA (PB5)
   *
   * I2C2: Accessible via expansion headers
   *   SCL (PA9)
   *   SDA (PA10)
   *   SMBA (PB12)
   */
  
  #ifdef CONFIG_STM32_I2C1
  #define GPIO_I2C1_SCL  GPIO_I2C1_SCL_1
  #define GPIO_I2C1_SDA  GPIO_I2C1_SDA_1
  #endif
  
  #ifdef CONFIG_STM32_I2C2
  #define GPIO_I2C2_SCL  GPIO_I2C2_SCL_1
  #define GPIO_I2C2_SDA  GPIO_I2C2_SDA_1
  #endif
  
  /************************************************************************************
   * Public Data
   ************************************************************************************/
  
  #ifndef __ASSEMBLY__
  
  #undef EXTERN
  #if defined(__cplusplus)
  #define EXTERN extern "C"
  extern "C"
  {
  #else
  #define EXTERN extern
  #endif
  
  /************************************************************************************
   * Public Function Prototypes
   ************************************************************************************/
  
  /************************************************************************************
   * Name: stm32_boardinitialize
   *
   * Description:
   *   All STM32 architectures must provide the following entry point.  This entry point
   *   is called early in the intitialization -- after all memory has been configured
   *   and mapped but before any devices have been initialized.
   *
   ************************************************************************************/
  
  void stm32_boardinitialize(void);
  
  #undef EXTERN
  #if defined(__cplusplus)
  }
  #endif
  
  #endif /* __ASSEMBLY__ */
  #endif  /* __CONFIG_STM32F3DISCOVERY_INCLUDE_BOARD_H */
  