/************************************************************************************ * configs/stm32ldiscovery/include/board.h * include/arch/board/board.h * * Copyright (C) 2013 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * 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_STM32LDISCOVERY_INCLUDE_BOARD_H #define __CONFIG_STM32LDISCOVERY_INCLUDE_BOARD_H /************************************************************************************ * Included Files ************************************************************************************/ #include #ifndef __ASSEMBLY__ # include #endif #include "stm32_rcc.h" #include "stm32.h" /************************************************************************************ * Definitions ************************************************************************************/ /* Clocking *************************************************************************/ /* Four different clock sources can be used to drive the system clock (SYSCLK): * * - HSI high-speed internal oscillator clock * Generated from an internal 16 MHz RC oscillator * - HSE high-speed external oscillator clock * Normally driven by an external crystal (X3). However, this crystal is not fitted * on the STM32L-Discovery board. * - PLL clock * - MSI multispeed internal oscillator clock * The MSI clock signal is generated from an internal RC oscillator. Seven frequency * ranges are available: 65.536 kHz, 131.072 kHz, 262.144 kHz, 524.288 kHz, 1.048 MHz, * 2.097 MHz (default value) and 4.194 MHz. * * The devices have the following two secondary clock sources * - LSI low-speed internal RC clock * Drives the watchdog and RTC. Approximately 37KHz * - LSE low-speed external oscillator clock * Driven by 32.768KHz crystal (X2) on the OSC32_IN and OSC32_OUT pins. */ #define STM32_BOARD_XTAL 8000000ul /* X3 on board (not fitted)*/ #define STM32_HSI_FREQUENCY 16000000ul /* Approximately 16MHz */ #define STM32_HSE_FREQUENCY STM32_BOARD_XTAL #define STM32_MSI_FREQUENCY 2097000 /* Default is approximately 2.097Mhz */ #define STM32_LSI_FREQUENCY 37000 /* Approximately 37KHz */ #define STM32_LSE_FREQUENCY 32768 /* X2 on board */ /* PLL Configuration * * - PLL source is HSI -> 16MHz input (nominal) * - PLL multipler is 6 -> 96MHz PLL VCO clock output (for USB) * - PLL output divider 3 -> 32MHz divided down PLL VCO clock output * * Resulting SYSCLK frequency is 16MHz x 6 / 3 = 32MHz * * USB/SDIO: * If the USB or SDIO interface is used in the application, the PLL VCO * clock (defined by STM32_CFGR_PLLMUL) must be programmed to output a 96 * MHz frequency. This is required to provide a 48 MHz clock to the USB or * SDIO (SDIOCLK or USBCLK = PLLVCO/2). * SYSCLK * The system clock is derived from the PLL VCO divided by the output division factor. * Limitations: * 96 MHz as PLLVCO when the product is in range 1 (1.8V), * 48 MHz as PLLVCO when the product is in range 2 (1.5V), * 24 MHz when the product is in range 3 (1.2V). * Output division to avoid exceeding 32 MHz as SYSCLK. * The minimum input clock frequency for PLL is 2 MHz (when using HSE as PLL source). */ #define STM32_CFGR_PLLSRC 0 /* Source is 16MHz HSI */ #ifdef CONFIG_STM32_USB # define STM32_CFGR_PLLMUL RCC_CFGR_PLLMUL_CLKx6 /* PLLMUL = 6 */ # define STM32_CFGR_PLLDIV RCC_CFGR_PLLDIV_3 /* PLLDIV = 3 */ # define STM32_PLL_FREQUENCY (6*STM32_HSI_FREQUENCY) /* PLL VCO Frequency is 96MHz */ #else # define STM32_CFGR_PLLMUL RCC_CFGR_PLLMUL_CLKx4 /* PLLMUL = 4 */ # define STM32_CFGR_PLLDIV RCC_CFGR_PLLDIV_2 /* PLLDIV = 2 */ # define STM32_PLL_FREQUENCY (4*STM32_HSI_FREQUENCY) /* PLL VCO Frequency is 64MHz */ #endif /* Use the PLL and set the SYSCLK source to be the divided down PLL VCO output * frequency (STM32_PLL_FREQUENCY divided by the PLLDIV value). */ #define STM32_SYSCLK_SW RCC_CFGR_SW_PLL /* Use the PLL as the SYSCLK */ #define STM32_SYSCLK_SWS RCC_CFGR_SWS_PLL #ifdef CONFIG_STM32_USB # define STM32_SYSCLK_FREQUENCY (STM32_PLL_FREQUENCY/3) /* SYSCLK frequence is 96MHz/PLLDIV = 32MHz */ #else # define STM32_SYSCLK_FREQUENCY (STM32_PLL_FREQUENCY/2) /* SYSCLK frequence is 64MHz/PLLDIV = 32MHz */ #endif /* AHB clock (HCLK) is SYSCLK (32MHz) */ #define STM32_RCC_CFGR_HPRE RCC_CFGR_HPRE_SYSCLK #define STM32_HCLK_FREQUENCY STM32_SYSCLK_FREQUENCY #define STM32_BOARD_HCLK STM32_HCLK_FREQUENCY /* Same as above, to satisfy compiler */ /* APB2 clock (PCLK2) is HCLK (32MHz) */ #define STM32_RCC_CFGR_PPRE2 RCC_CFGR_PPRE2_HCLK #define STM32_PCLK2_FREQUENCY STM32_HCLK_FREQUENCY #define STM32_APB2_CLKIN (STM32_PCLK2_FREQUENCY) /* APB2 timers 9, 10, and 11 will receive PCLK2. */ #define STM32_APB2_TIM9_CLKIN (STM32_PCLK2_FREQUENCY) #define STM32_APB2_TIM10_CLKIN (STM32_PCLK2_FREQUENCY) #define STM32_APB2_TIM11_CLKIN (STM32_PCLK2_FREQUENCY) /* APB1 clock (PCLK1) is HCLK (32MHz) */ #define STM32_RCC_CFGR_PPRE1 RCC_CFGR_PPRE1_HCLK #define STM32_PCLK1_FREQUENCY (STM32_HCLK_FREQUENCY) /* APB1 timers 2-7 will receive PCLK1 */ #define STM32_APB1_TIM2_CLKIN (STM32_PCLK1_FREQUENCY) #define STM32_APB1_TIM3_CLKIN (STM32_PCLK1_FREQUENCY) #define STM32_APB1_TIM4_CLKIN (STM32_PCLK1_FREQUENCY) #define STM32_APB1_TIM5_CLKIN (STM32_PCLK1_FREQUENCY) #define STM32_APB1_TIM6_CLKIN (STM32_PCLK1_FREQUENCY) #define STM32_APB1_TIM7_CLKIN (STM32_PCLK1_FREQUENCY) /* LED definitions ******************************************************************/ /* The STM32L-Discovery board has four LEDs. Two of these are controlled by * logic on the board and are not available for software control: * * LD1 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. * LD2 PWR: Red LED indicates that the board is powered. * * And two LEDs can be controlled by software: * * User LD3: Green LED is a user LED connected to the I/O PB7 of the STM32L152 * MCU. * User LD4: Blue LED is a user LED connected to the I/O PB6 of the STM32L152 * MCU. * * 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 stm32_setled() */ #define BOARD_LED1 0 /* User LD3 */ #define BOARD_LED2 1 /* User LD4 */ #define BOARD_NLEDS 2 /* LED bits for use with stm32_setleds() */ #define BOARD_LED1_BIT (1 << BOARD_LED1) #define BOARD_LED2_BIT (1 << BOARD_LED2) /* If CONFIG_ARCH_LEDs is defined, then NuttX will control the 8 LEDs on board the * STM32L-Discovery. The following definitions describe how NuttX controls the LEDs: * * SYMBOL Meaning LED state * LED1 LED2 * ------------------- ----------------------- -------- -------- * LED_STARTED NuttX has been started OFF OFF * LED_HEAPALLOCATE Heap has been allocated OFF OFF * LED_IRQSENABLED Interrupts enabled OFF OFF * LED_STACKCREATED Idle stack created ON OFF * LED_INIRQ In an interrupt No change * LED_SIGNAL In a signal handler No change * LED_ASSERTION An assertion failed No change * LED_PANIC The system has crashed OFF Blinking * LED_IDLE STM32 is is sleep mode Not used */ #define LED_STARTED 0 #define LED_HEAPALLOCATE 0 #define LED_IRQSENABLED 0 #define LED_STACKCREATED 1 #define LED_INIRQ 2 #define LED_SIGNAL 2 #define LED_ASSERTION 2 #define LED_PANIC 3 /* Button definitions ***************************************************************/ /* The STM32L-Discovery 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 STM32L152RBT6. * B2 RESET: pushbutton connected to NRST is used to RESET the STM32L152RBT6. */ #define BUTTON_USER 0 #define NUM_BUTTONS 1 #define BUTTON_USER_BIT (1 << BUTTON_USER) /* Alternate Pin Functions **********************************************************/ /* The STM32L-Discovery has no on-board RS-232 driver. Further, there are no USART * pins that do not conflict with the on board resources, in particular, the LCD: * Most USART pins are available if the LCD is enabled; USART2 may be used if either * the LCD or the on-board LEDs are disabled. * * PA9 USART1_TX LCD glass COM1 P2, pin 22 * PA10 USART1_RX LCD glass COM2 P2, pin 21 * PB6 USART1_TX LED Blue P2, pin 8 * PB7 USART1_RX LED Green P2, pin 7 * * PA2 USART2_TX LCD SEG1 P1, pin 17 * PA3 USART2_RX LCD SEG2 P1, pin 18 * * PB10 USART3_TX LCD SEG6 P1, pin 22 * PB11 USART3_RX LCD SEG7 P1, pin 23 * PC10 USART3_TX LCD SEG22 P2, pin 15 * PC11 USART3_RX LCD SEG23 P2, pin 14 */ #if !defined(CONFIG_STM32_LCD) /* Select PA9 and PA10 if the LCD is not enabled */ # define GPIO_USART1_RX GPIO_USART1_RX_1 /* PA10 */ # define GPIO_USART1_TX GPIO_USART1_TX_1 /* PA9 */ /* This there are no other options for USART1 on this part */ # define GPIO_USART2_RX GPIO_USART2_RX_1 /* PA3 */ # define GPIO_USART2_TX GPIO_USART2_TX_1 /* PA2 */ /* Arbirtrarily select PB10 and PB11 */ # define GPIO_USART3_RX GPIO_USART3_RX_1 /* PB11 */ # define GPIO_USART3_TX GPIO_USART3_TX_1 /* PB10 */ #elif !defined(CONFIG_ARCH_LEDS) /* Select PB6 and PB7 if the LEDs are not enabled */ # define GPIO_USART1_RX GPIO_USART1_RX_2 /* PB7 */ # define GPIO_USART1_TX GPIO_USART1_TX_2 /* PB6 */ #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); /************************************************************************************ * Name: stm32_ledinit, stm32_setled, and stm32_setleds * * Description: * If CONFIG_ARCH_LEDS is defined, then NuttX will control the on-board LEDs. If * CONFIG_ARCH_LEDS is not defined, then the following interfacesare available to * control the LEDs from user applications. * ************************************************************************************/ #ifndef CONFIG_ARCH_LEDS void stm32_ledinit(void); void stm32_setled(int led, bool ledon); void stm32_setleds(uint8_t ledset); #endif /************************************************************************************ * Button support. * * Description: * up_buttoninit() must be called to initialize button resources. After * that, up_buttons() may be called to collect the current state of all * buttons or up_irqbutton() may be called to register button interrupt * handlers. * * After up_buttoninit() has been called, up_buttons() may be called to * collect the state of all buttons. up_buttons() returns an 8-bit bit set * with each bit associated with a button. See the BUTTON_*_BIT * definitions in board.h for the meaning of each bit. * * up_irqbutton() may be called to register an interrupt handler that will * be called when a button is depressed or released. The ID value is a * button enumeration value that uniquely identifies a button resource. See the * BUTTON_* definitions in board.h for the meaning of enumeration * value. The previous interrupt handler address is returned (so that it may * restored, if so desired). * ************************************************************************************/ #ifdef CONFIG_ARCH_BUTTONS void up_buttoninit(void); uint8_t up_buttons(void); #ifdef CONFIG_ARCH_IRQBUTTONS xcpt_t up_irqbutton(int id, xcpt_t irqhandler); #endif #endif #undef EXTERN #if defined(__cplusplus) } #endif #endif /* __ASSEMBLY__ */ #endif /* __CONFIG_STM32LDISCOVERY_INCLUDE_BOARD_H */