periph_conf.h

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/*
 * Copyright (C) 2019 Mesotic SAS
 *
 * 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.
 */
 
#pragma once

 
#include "periph_cpu.h"
 
#ifdef __cplusplus
extern "C" {
#endif

#define CLOCK_CORECLOCK     (16000000U)

#define USE_VREG_BUCK       (1)

static const tc32_conf_t timer_config[] = {
    {   /* Timer 0 - System Clock */
        .dev            = TC0,
        .irq            = TC0_IRQn,
        .mclk           = &MCLK->APBCMASK.reg,
        .mclk_mask      = MCLK_APBCMASK_TC0_Msk | MCLK_APBCMASK_TC1_Msk,
        .gclk_id        = TC0_GCLK_ID,
        .gclk_src       = SAM0_GCLK_MAIN,
        .flags          = TC_CTRLA_MODE_COUNT32,
    },
    {
        .dev            = TC2,
        .irq            = TC2_IRQn,
        .mclk           = &MCLK->APBCMASK.reg,
        .mclk_mask      = MCLK_APBCMASK_TC2_Msk,
        .gclk_id        = TC2_GCLK_ID,
        .gclk_src       = SAM0_GCLK_MAIN,
        .flags          = TC_CTRLA_MODE_COUNT16,
    }
};
 
/* Timer 0 configuration */
#define TIMER_0_CHANNELS    2
#define TIMER_0_ISR         isr_tc0
 
/* Timer 1 configuration */
#define TIMER_1_CHANNELS    2
#define TIMER_1_ISR         isr_tc2
#define TIMER_1_MAX_VALUE   0xffff
 
#define TIMER_NUMOF         ARRAY_SIZE(timer_config)

static const uart_conf_t uart_config[] = {
    {    /* Virtual COM Port */
        .dev      = &SERCOM2->USART,
        .rx_pin   = GPIO_PIN(PA, 25),
        .tx_pin   = GPIO_PIN(PA, 24),
#ifdef MODULE_PERIPH_UART_HW_FC
        .rts_pin  = GPIO_UNDEF,
        .cts_pin  = GPIO_UNDEF,
#endif
        .mux      = GPIO_MUX_D,
        .rx_pad   = UART_PAD_RX_3,
        .tx_pad   = UART_PAD_TX_2,
        .flags    = UART_FLAG_NONE,
        .gclk_src = SAM0_GCLK_MAIN,
    },
    {    /* EXT1 */
        /* For SAML11, see boards/saml11/doc.txt
         * to properly enable this SERCOM */
        .dev      = &SERCOM1->USART,
        .rx_pin   = GPIO_PIN(PA, 9),
        .tx_pin   = GPIO_PIN(PA, 8),
#ifdef MODULE_PERIPH_UART_HW_FC
        .rts_pin  = GPIO_UNDEF,
        .cts_pin  = GPIO_UNDEF,
#endif
        .mux      = GPIO_MUX_C,
        .rx_pad   = UART_PAD_RX_1,
        .tx_pad   = UART_PAD_TX_0,
        .flags    = UART_FLAG_NONE,
        .gclk_src = SAM0_GCLK_MAIN,
    }
};
 
/* interrupt function name mapping */
#define UART_0_ISR          isr_sercom2_2
#define UART_0_ISR_TX       isr_sercom2_0
#define UART_1_ISR          isr_sercom1_2
#define UART_1_ISR_TX       isr_sercom1_0
 
#define UART_NUMOF          ARRAY_SIZE(uart_config)

#define PWM_0_EN            1
#define PWM_1_EN            0
 
#if PWM_0_EN
/* PWM0 channels */
static const pwm_conf_chan_t pwm_chan0_config[] = {
    /* GPIO pin, MUX value, TC channel */
    { GPIO_PIN(PA, 18), GPIO_MUX_E, 0 },
    { GPIO_PIN(PA, 19), GPIO_MUX_E, 1 },
};
#endif
#if PWM_1_EN
/* PWM1 channels */
static const pwm_conf_chan_t pwm_chan1_config[] = {
    /* GPIO pin, MUX value, TC channel */
    { GPIO_PIN(PA, 7), GPIO_MUX_E, 1 }, /* LED */
};
#endif
 
/* PWM device configuration */
static const pwm_conf_t pwm_config[] = {
#if PWM_0_EN
    { .tim  = TC_CONFIG(TC2),
      .chan = pwm_chan0_config,
      .chan_numof = ARRAY_SIZE(pwm_chan0_config),
      .gclk_src = SAM0_GCLK_MAIN,
    },
#endif
#if PWM_1_EN
    /* conflicts with xtimer config (TC0_TC1) */
    { .tim  = TC_CONFIG(TC1),
      .chan = pwm_chan1_config,
      .chan_numof = ARRAY_SIZE(pwm_chan0_config),
      .gclk_src = SAM0_GCLK_MAIN,
    },
#endif
};
 
/* number of devices that are actually defined */
#define PWM_NUMOF           ARRAY_SIZE(pwm_config)

static const spi_conf_t spi_config[] = {
    {
        .dev      = &(SERCOM0->SPI),
        .miso_pin = GPIO_PIN(PA,  4),
        .mosi_pin = GPIO_PIN(PA, 14),
        .clk_pin  = GPIO_PIN(PA, 15),
        .miso_mux = GPIO_MUX_D,
        .mosi_mux = GPIO_MUX_D,
        .clk_mux  = GPIO_MUX_D,
        .miso_pad = SPI_PAD_MISO_0,
        .mosi_pad = SPI_PAD_MOSI_2_SCK_3,
        .gclk_src = SAM0_GCLK_MAIN,
#ifdef MODULE_PERIPH_DMA
        .tx_trigger = SERCOM0_DMAC_ID_TX,
        .rx_trigger = SERCOM0_DMAC_ID_RX,
#endif
    }
};
 
#define SPI_NUMOF           ARRAY_SIZE(spi_config)

static const i2c_conf_t i2c_config[] = {
    {
        .dev      = &(SERCOM1->I2CM),
        .speed    = I2C_SPEED_NORMAL,
        .scl_pin  = GPIO_PIN(PA, 17),
        .sda_pin  = GPIO_PIN(PA, 16),
        .mux      = GPIO_MUX_C,
        .gclk_src = SAM0_GCLK_MAIN,
        .flags    = I2C_FLAG_NONE
    }
};
 
#define I2C_NUMOF           ARRAY_SIZE(i2c_config)

#define EXTERNAL_OSC32_SOURCE                    1
#define ULTRA_LOW_POWER_INTERNAL_OSC_SOURCE      0

#ifndef RTT_FREQUENCY
#define RTT_FREQUENCY       (32768U)
#endif

 
/* ADC Default values */
#define ADC_PRESCALER                       ADC_CTRLB_PRESCALER_DIV256
 
#define ADC_NEG_INPUT                       ADC_INPUTCTRL_MUXNEG(0x18u)
#define ADC_REF_DEFAULT                     ADC_REFCTRL_REFSEL_INTVCC2
 
static const adc_conf_chan_t adc_channels[] = {
    /* port, pin, muxpos */
    { .inputctrl = ADC_INPUTCTRL_MUXPOS_PA10 },
};
 
#define ADC_NUMOF                           ARRAY_SIZE(adc_channels)

#define DAC_CLOCK           SAM0_GCLK_32KHZ
                            /* use Vcc as reference voltage */
#define DAC_VREF            DAC_CTRLB_REFSEL_AVCC
 
#ifdef __cplusplus
}
#endif