periph_conf.h

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/*
 * SPDX-FileCopyrightText: 2024 ML!PA Consulting GmbH
 * SPDX-License-Identifier: LGPL-2.1-only
 */
 
#pragma once

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

#ifndef CLOCK_CORECLOCK
#define CLOCK_CORECLOCK     MHZ(120)
#endif

#define EXTERNAL_OSC32_SOURCE                    1
#define ULTRA_LOW_POWER_INTERNAL_OSC_SOURCE      0

#define USE_VREG_BUCK       (1)

static const tc32_conf_t timer_config[] = {
    {   /* Timer 0 - System Clock */
        .dev            = TC0,
        .irq            = TC0_IRQn,
        .mclk           = &MCLK->APBAMASK.reg,
        .mclk_mask      = MCLK_APBAMASK_TC0 | MCLK_APBAMASK_TC1,
        .gclk_id        = TC0_GCLK_ID,
        .gclk_src       = SAM0_GCLK_TIMER,
        .flags          = TC_CTRLA_MODE_COUNT32,
    },
    {   /* Timer 1 */
        .dev            = TC2,
        .irq            = TC2_IRQn,
        .mclk           = &MCLK->APBBMASK.reg,
        .mclk_mask      = MCLK_APBBMASK_TC2 | MCLK_APBBMASK_TC3,
        .gclk_id        = TC2_GCLK_ID,
        .gclk_src       = SAM0_GCLK_TIMER,
        .flags          = TC_CTRLA_MODE_COUNT32,
    }
};
 
/* 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_NUMOF         ARRAY_SIZE(timer_config)

static const can_conf_t candev_conf[] = {
    {
        .can = CAN0,
        .rx_pin = GPIO_PIN(PA, 22),
        .tx_pin = GPIO_PIN(PB, 23),
        .gclk_src = SAM0_GCLK_PERIPH,
    },
    {
        .can = CAN1,
        .rx_pin = GPIO_PIN(PB, 15),
        .tx_pin = GPIO_PIN(PB, 14),
        .gclk_src = SAM0_GCLK_PERIPH,
    }
};

#define ISR_CAN0            isr_can0

#define ISR_CAN1            isr_can1

#define CAN_NUMOF           ARRAY_SIZE(candev_conf)

static const uart_conf_t uart_config[] = {
    {   /* Virtual COM Port */
        .dev      = &SERCOM5->USART,
        .rx_pin   = GPIO_PIN(PB, 16),
        .tx_pin   = GPIO_PIN(PB, 17),
        .mux      = GPIO_MUX_C,
        .rx_pad   = UART_PAD_RX_1,
        .tx_pad   = UART_PAD_TX_0,
        .flags    = UART_FLAG_NONE,
        .gclk_src = SAM0_GCLK_PERIPH,
    },
    {   /* shared with CAN1 */
        .dev      = &SERCOM4->USART,
        .rx_pin   = GPIO_PIN(PB, 13),
        .tx_pin   = GPIO_PIN(PB, 12),
#ifdef MODULE_PERIPH_UART_HW_FC
        .rts_pin  = GPIO_PIN(PB, 14),
        .cts_pin  = GPIO_PIN(PB, 15),
#endif
        .mux      = GPIO_MUX_C,
        .rx_pad   = UART_PAD_RX_1,
#ifdef MODULE_PERIPH_UART_HW_FC
        .tx_pad   = UART_PAD_TX_0_RTS_2_CTS_3,
#else
        .tx_pad   = UART_PAD_TX_0,
#endif
        .flags    = UART_FLAG_NONE,
        .gclk_src = SAM0_GCLK_PERIPH,
    },
    {
        .dev      = &SERCOM0->USART,
        .rx_pin   = GPIO_PIN(PA, 9),
        .tx_pin   = GPIO_PIN(PA, 8),
#ifdef MODULE_PERIPH_UART_HW_FC
        .rts_pin  = GPIO_PIN(PA, 10),
        .cts_pin  = GPIO_PIN(PA, 10),
#endif
        .mux      = GPIO_MUX_C,
        .rx_pad   = UART_PAD_RX_1,
#ifdef MODULE_PERIPH_UART_HW_FC
        .tx_pad   = UART_PAD_TX_0_RTS_2_CTS_3,
#else
        .tx_pad   = UART_PAD_TX_0,
#endif
        .flags    = UART_FLAG_NONE,
        .gclk_src = SAM0_GCLK_PERIPH,
    },
    {   /* shared with CAN0 */
        .dev      = &SERCOM3->USART,
        .rx_pin   = GPIO_PIN(PA, 23),
        .tx_pin   = GPIO_PIN(PA, 22),
        .mux      = GPIO_MUX_C,
        .rx_pad   = UART_PAD_RX_1,
        .tx_pad   = UART_PAD_TX_0,
        .flags    = UART_FLAG_NONE,
        .gclk_src = SAM0_GCLK_PERIPH,
    }
};
 
/* interrupt function name mapping */
#define UART_0_ISR          isr_sercom5_2
#define UART_0_ISR_TX       isr_sercom5_0
 
#define UART_1_ISR          isr_sercom4_2
#define UART_1_ISR_TX       isr_sercom4_0
 
#define UART_2_ISR          isr_sercom0_2
#define UART_2_ISR_TX       isr_sercom0_0
 
#define UART_3_ISR          isr_sercom3_2
#define UART_3_ISR_TX       isr_sercom3_0
 
#define UART_NUMOF          ARRAY_SIZE(uart_config)

 
/* PWM0 channels */
static const pwm_conf_chan_t pwm_chan0_config[] = {
    /* GPIO pin, MUX value, TCC channel */
    {
        .pin  = GPIO_PIN(PA, 14),   /* LED0 */
        .mux  = GPIO_MUX_F,
        .chan = 0,
    },
};
 
/* PWM device configuration */
static const pwm_conf_t pwm_config[] = {
    {
        .tim  = TCC_CONFIG(TCC2),
        .chan = pwm_chan0_config,
        .chan_numof = ARRAY_SIZE(pwm_chan0_config),
        .gclk_src = SAM0_GCLK_48MHZ,
    },
};
 
/* number of devices that are actually defined */
#define PWM_NUMOF           ARRAY_SIZE(pwm_config)

static const spi_conf_t spi_config[] = {
    {
        .dev      = &SERCOM1->SPI,
        .miso_pin = GPIO_PIN(PA, 19),
        .mosi_pin = GPIO_PIN(PA, 16),
        .clk_pin  = GPIO_PIN(PA, 27),
        .miso_mux = GPIO_MUX_C,
        .mosi_mux = GPIO_MUX_C,
        .clk_mux  = GPIO_MUX_C,
        .miso_pad = SPI_PAD_MISO_3,
        .mosi_pad = SPI_PAD_MOSI_0_SCK_1,
        .gclk_src = SAM0_GCLK_PERIPH,
#ifdef MODULE_PERIPH_DMA
        .tx_trigger = SERCOM1_DMAC_ID_TX,
        .rx_trigger = SERCOM1_DMAC_ID_RX,
#endif
 
    },
};
 
#define SPI_NUMOF           ARRAY_SIZE(spi_config)

static const i2c_conf_t i2c_config[] = {
    {
        .dev      = &SERCOM2->I2CM,
        .speed    = I2C_SPEED_NORMAL,
        .scl_pin  = GPIO_PIN(PA, 13),
        .sda_pin  = GPIO_PIN(PA, 12),
        .mux      = GPIO_MUX_C,
        .gclk_src = SAM0_GCLK_PERIPH,
        .flags    = I2C_FLAG_NONE
    },
};
 
#define I2C_NUMOF           ARRAY_SIZE(i2c_config)

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

static const sam0_common_usb_config_t sam_usbdev_config[] = {
    {
        .dm     = GPIO_PIN(PA, 24),
        .dp     = GPIO_PIN(PA, 25),
        .d_mux  = GPIO_MUX_H,
        .device = &USB->DEVICE,
        .gclk_src = SAM0_GCLK_PERIPH,
    }
};

 
/* ADC Default values */
#define ADC_GCLK_SRC                        SAM0_GCLK_PERIPH    
#define ADC_PRESCALER                       ADC_CTRLA_PRESCALER_DIV8
 
#define ADC_NEG_INPUT                       ADC_INPUTCTRL_MUXNEG(0x18u)
#define ADC_REF_DEFAULT                     ADC_REFCTRL_REFSEL_INTVCC1
 
static const adc_conf_chan_t adc_channels[] = {
    /* inputctrl, dev */
    { .inputctrl = ADC0_INPUTCTRL_MUXPOS_PA07, .dev = ADC0 },
    { .inputctrl = ADC0_INPUTCTRL_MUXPOS_PA04, .dev = ADC0 },
    { .inputctrl = ADC0_INPUTCTRL_MUXPOS_PB09, .dev = ADC0 },
    { .inputctrl = ADC0_INPUTCTRL_MUXPOS_PA11, .dev = ADC0 },
    { .inputctrl = ADC0_INPUTCTRL_MUXPOS_PA10, .dev = ADC0 },
    { .inputctrl = ADC0_INPUTCTRL_MUXPOS_PB08, .dev = ADC0 },
    { .inputctrl = ADC0_INPUTCTRL_MUXPOS_PB03, .dev = ADC0 },
    { .inputctrl = ADC0_INPUTCTRL_MUXPOS_PA02, .dev = ADC0 },
    { .inputctrl = ADC1_INPUTCTRL_MUXPOS_PB04, .dev = ADC1 },
    { .inputctrl = ADC1_INPUTCTRL_MUXPOS_PB05, .dev = ADC1 },
    { .inputctrl = ADC1_INPUTCTRL_MUXPOS_PB06, .dev = ADC1 },
    { .inputctrl = ADC1_INPUTCTRL_MUXPOS_PB07, .dev = ADC1 },
    { .inputctrl = ADC0_INPUTCTRL_MUXPOS_PB01, .dev = ADC0 },
    { .inputctrl = ADC0_INPUTCTRL_MUXPOS_PB00, .dev = ADC0 },
    { .inputctrl = ADC0_INPUTCTRL_MUXPOS_PA03, .dev = ADC0 },
};
 
#define ADC_NUMOF                           ARRAY_SIZE(adc_channels)

                            /* Must not exceed 12 MHz */
#define DAC_CLOCK           SAM0_GCLK_TIMER
                            /* Use external reference voltage on PA03 */
                            /* (You have to manually connect PA03 with Vcc) */
                            /* Internal reference only gives 1V */
#define DAC_VREF            DAC_CTRLB_REFSEL_VREFPU
 
#ifdef __cplusplus
}
#endif