RIOT/boards/fox/include/periph_conf.h

/*
 * Copyright (C) 2014 Freie Universität Berlin
 *
 * This file is subject to the terms and conditions of the GNU Lesser General
 * Public License v2.1. See the file LICENSE in the top level directory for more
 * details.
 */

/**
 * @ingroup     boards_fox
 * @{
 *
 * @file
 * @brief       Peripheral MCU configuration for the fox board
 *
 * @author      Thomas Eichinger <thomas.eichinger@fu-berlin.de>
 */

#ifndef PERIPH_CONF_H
#define PERIPH_CONF_H

#include "periph_cpu.h"

#ifdef __cplusplus
extern "C" {
#endif

/**
 * @name    Clock system configuration
 * @{
 **/
/* high speed clock configuration:
 * 0 := use internal HSI oscillator (always 8MHz)
 * HSE frequency value := use external HSE oscillator with given freq [in Hz]
 *                        must be 4000000 <= value <= 16000000 */
#define CLOCK_HSE           (16000000U)
/* low speed clock configuration:
 * 0 := use internal LSI oscillator (~40kHz)
 * 1 := use extern LSE oscillator, always 32.768kHz */
#define CLOCK_LSE           (1)
/* targeted system clock speed [in Hz], must be <= 72MHz */
#define CLOCK_CORECLOCK     (72000000U)
/* PLL configuration, set both values to zero to disable PLL usage. The values
 * must be set to satisfy the following equation:
 * CORECLOCK := CLOCK_SOURCE / PLL_DIV * PLL_MUL
 * with
 * 1 <= CLOCK_PLL_DIV <= 2
 * 2 <= CLOCK_PLL_MUL <= 17 */
#define CLOCK_PLL_DIV       (2)
#define CLOCK_PLL_MUL       (9)
/* AHB and APBx bus clock configuration, keep in mind the following constraints:
 * ABP1 <= 36MHz
 */
#define CLOCK_AHB_DIV       RCC_CFGR_HPRE_DIV1
#define CLOCK_AHB           (CLOCK_CORECLOCK / 1)
#define CLOCK_APB2_DIV      RCC_CFGR_PPRE2_DIV1
#define CLOCK_APB2          (CLOCK_CORECLOCK / 1)
#define CLOCK_APB1_DIV      RCC_CFGR_PPRE1_DIV2
#define CLOCK_APB1          (CLOCK_CORECLOCK / 2)
/** @} */

/**
 * @name    Timer configuration
 * @{
 */
static const timer_conf_t timer_config[] = {
    {
        .dev      = TIM2,
        .max      = 0x0000ffff,
        .rcc_mask = RCC_APB1ENR_TIM2EN,
        .bus      = APB1,
        .irqn     = TIM2_IRQn
    },
    {
        .dev      = TIM3,
        .max      = 0x0000ffff,
        .rcc_mask = RCC_APB1ENR_TIM3EN,
        .bus      = APB1,
        .irqn     = TIM3_IRQn
    }
};

#define TIMER_0_ISR         isr_tim2
#define TIMER_1_ISR         isr_tim3

#define TIMER_NUMOF         ARRAY_SIZE(timer_config)
/** @} */

/**
 * @name    UART configuration
 * @{
 */
static const uart_conf_t uart_config[] = {
    {
        .dev      = USART2,
        .rcc_mask = RCC_APB1ENR_USART2EN,
        .rx_pin   = GPIO_PIN(PORT_A, 3),
        .tx_pin   = GPIO_PIN(PORT_A, 2),
        .bus      = APB1,
        .irqn     = USART2_IRQn
    },
    {
        .dev      = USART1,
        .rcc_mask = RCC_APB2ENR_USART1EN,
        .rx_pin   = GPIO_PIN(PORT_A, 10),
        .tx_pin   = GPIO_PIN(PORT_A, 9),
        .bus      = APB2,
        .irqn     = USART1_IRQn
    }
};

#define UART_0_ISR          (isr_usart2)
#define UART_1_ISR          (isr_usart1)

#define UART_NUMOF          ARRAY_SIZE(uart_config)
/** @} */

/**
 * @name    SPI configuration
 *
 * @note    The spi_divtable is auto-generated from
 *          `cpu/stm32_common/dist/spi_divtable/spi_divtable.c`
 * @{
 */
static const uint8_t spi_divtable[2][5] = {
    {       /* for APB1 @ 36000000Hz */
        7,  /* -> 140625Hz */
        6,  /* -> 281250Hz */
        4,  /* -> 1125000Hz */
        2,  /* -> 4500000Hz */
        1   /* -> 9000000Hz */
    },
    {       /* for APB2 @ 72000000Hz */
        7,  /* -> 281250Hz */
        7,  /* -> 281250Hz */
        5,  /* -> 1125000Hz */
        3,  /* -> 4500000Hz */
        2   /* -> 9000000Hz */
    }
};

static const spi_conf_t spi_config[] = {
    {
        .dev      = SPI2,
        .mosi_pin = GPIO_PIN(PORT_B, 15),
        .miso_pin = GPIO_PIN(PORT_B, 14),
        .sclk_pin = GPIO_PIN(PORT_B, 13),
        .cs_pin   = GPIO_UNDEF,
        .rccmask  = RCC_APB1ENR_SPI2EN,
        .apbbus   = APB1
    }
};

#define SPI_NUMOF           ARRAY_SIZE(spi_config)
/** @} */

/**
 * @name    Real time counter configuration
 * @{
 */
#define RTT_IRQ_PRIO        1

#define RTT_DEV             RTC
#define RTT_IRQ             RTC_IRQn
#define RTT_ISR             isr_rtc
#define RTT_MAX_VALUE       (0xffffffff)
#define RTT_FREQUENCY       (1)             /* in Hz */
#define RTT_PRESCALER       (0x7fff)        /* run with 1 Hz */
/** @} */

/**
 * @name    I2C configuration
  * @{
 */
static const i2c_conf_t i2c_config[] = {
    {
        .dev            = I2C1,
        .speed          = I2C_SPEED_NORMAL,
        .scl_pin        = GPIO_PIN(PORT_B, 6),
        .sda_pin        = GPIO_PIN(PORT_B, 7),
        .bus            = APB1,
        .rcc_mask       = RCC_APB1ENR_I2C1EN,
        .clk            = CLOCK_APB1,
        .irqn           = I2C1_EV_IRQn
    }
};

#define I2C_0_ISR           isr_i2c1_ev

#define I2C_NUMOF           ARRAY_SIZE(i2c_config)
/** @} */

#ifdef __cplusplus
}
#endif

#endif /* PERIPH_CONF_H */
/** @} */