periph_conf.h File Reference

Configuration of CPU peripherals for the Adafruit ItsyBitsy M4. More...

Detailed Description

Configuration of CPU peripherals for the Adafruit ItsyBitsy M4.

Author

Benjamin Valentin benja.nosp@m.min..nosp@m.valen.nosp@m.tin@.nosp@m.ml-pa.nosp@m..com

Definition in file periph_conf.h.

#include "periph_cpu.h"

Include dependency graph for periph_conf.h:

Go to the source code of this file.

Macros
#define	USE_VREG_BUCK   (1)
	Enable the internal DC/DC converter The board is equipped with the necessary inductor.

desired core clock frequency
#define	CLOCK_CORECLOCK   MHZ(120)

32kHz Oscillator configuration
#define	EXTERNAL_OSC32_SOURCE   0
#define	ULTRA_LOW_POWER_INTERNAL_OSC_SOURCE   1

Timer peripheral configuration
#define	TIMER_0_CHANNELS   2
#define	TIMER_0_ISR   isr_tc0
#define	TIMER_1_CHANNELS   2
#define	TIMER_1_ISR   isr_tc2
#define	TIMER_NUMOF   ARRAY_SIZE(timer_config)
static const tc32_conf_t	timer_config []

UART configuration
#define	UART_0_ISR   isr_sercom3_2
#define	UART_0_ISR_TX   isr_sercom3_0
#define	UART_NUMOF   ARRAY_SIZE(uart_config)
static const uart_conf_t	uart_config []

PWM configuration
#define	PWM_0_EN   1
#define	PWM_NUMOF   ARRAY_SIZE(pwm_config)
static const pwm_conf_chan_t	pwm_chan0_config []
static const pwm_conf_t	pwm_config []

SPI configuration
#define	SPI_NUMOF   ARRAY_SIZE(spi_config)
static const spi_conf_t	spi_config []

I2C configuration
#define	I2C_NUMOF   ARRAY_SIZE(i2c_config)
static const i2c_conf_t	i2c_config []

RTT configuration
#define	RTT_FREQUENCY   (32768U)

ADC Configuration
#define	ADC_GCLK_SRC   SAM0_GCLK_PERIPH
	clock used for ADC
#define	ADC_PRESCALER   ADC_CTRLA_PRESCALER_DIV8
#define	ADC_NEG_INPUT   ADC_INPUTCTRL_MUXNEG(0x18u)
#define	ADC_REF_DEFAULT   ADC_REFCTRL_REFSEL_INTVCC1
#define	ADC_NUMOF   ARRAY_SIZE(adc_channels)
static const adc_conf_chan_t	adc_channels []

DAC configuration
#define	DAC_CLOCK   SAM0_GCLK_TIMER
#define	DAC_VREF   DAC_CTRLB_REFSEL_VREFPU

USB peripheral configuration
static const sam0_common_usb_config_t	sam_usbdev_config []

Variable Documentation

adc_channels

const adc_conf_chan_t adc_channels[]

static

Initial value:

= {
    
    { .inputctrl = ADC0_INPUTCTRL_MUXPOS_PA02, .dev = ADC0 },
    { .inputctrl = ADC0_INPUTCTRL_MUXPOS_PA05, .dev = ADC0 },
    { .inputctrl = ADC0_INPUTCTRL_MUXPOS_PB08, .dev = ADC0 },
    { .inputctrl = ADC0_INPUTCTRL_MUXPOS_PB09, .dev = ADC0 },
    { .inputctrl = ADC0_INPUTCTRL_MUXPOS_PA04, .dev = ADC0 },
    { .inputctrl = ADC0_INPUTCTRL_MUXPOS_PA06, .dev = ADC0 },
}

Definition at line 243 of file periph_conf.h.

i2c_config

const i2c_conf_t i2c_config[]

static

Initial value:

= {
    {
        .dev      = &(SERCOM2->I2CM),
        .speed    = I2C_SPEED_NORMAL,
        .scl_pin  = GPIO_PIN(PA, 12),
        .sda_pin  = GPIO_PIN(PA, 13),
        .mux      = GPIO_MUX_C,
        .gclk_src = SAM0_GCLK_PERIPH,
        .flags    = I2C_FLAG_NONE
    },
}

Definition at line 192 of file periph_conf.h.

pwm_chan0_config

const pwm_conf_chan_t pwm_chan0_config[]

static

Initial value:

= {
    
    { GPIO_PIN(PA, 22), GPIO_MUX_G, 2 },
}

Definition at line 123 of file periph_conf.h.

pwm_config

const pwm_conf_t pwm_config[]

static

Initial value:

= {
 
    { .tim  = TCC_CONFIG(TCC0),
      .chan = pwm_chan0_config,
      .chan_numof = ARRAY_SIZE(pwm_chan0_config),
      .gclk_src = SAM0_GCLK_PERIPH,
    },
 
}

Definition at line 130 of file periph_conf.h.

sam_usbdev_config

const sam0_common_usb_config_t sam_usbdev_config[]

static

Initial value:

= {
    {
        .dm     = GPIO_PIN(PA, 24),
        .dp     = GPIO_PIN(PA, 25),
        .d_mux  = GPIO_MUX_H,
        .device = &USB->DEVICE,
        .gclk_src = SAM0_GCLK_PERIPH,
    }
}

Definition at line 220 of file periph_conf.h.

timer_config

const tc32_conf_t timer_config[]

static

Initial value:

= {
    {   
        .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,
    },
    {   
        .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,
    }
}

Definition at line 55 of file periph_conf.h.

uart_config

const uart_conf_t uart_config[]

static

Initial value:

= {
    {
        .dev      = &SERCOM3->USART,
        .rx_pin   = GPIO_PIN(PA, 16),
        .tx_pin   = GPIO_PIN(PA, 17),
 
 
 
 
        .mux      = GPIO_MUX_D,
        .rx_pad   = UART_PAD_RX_1,
        .tx_pad   = UART_PAD_TX_0,
        .flags    = UART_FLAG_NONE,
        .gclk_src = SAM0_GCLK_PERIPH,
    },
}

Definition at line 91 of file periph_conf.h.