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:

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_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_PRESCALER ADC_CTRLA_PRESCALER_DIV128

#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 []

Macro Definition Documentation

◆ ADC_NEG_INPUT

#define ADC_NEG_INPUT ADC_INPUTCTRL_MUXNEG(0x18u)

Definition at line 239 of file periph_conf.h.

◆ ADC_NUMOF

#define ADC_NUMOF ARRAY_SIZE(adc_channels)

Definition at line 252 of file periph_conf.h.

◆ ADC_PRESCALER

#define ADC_PRESCALER ADC_CTRLA_PRESCALER_DIV128

Definition at line 237 of file periph_conf.h.

◆ ADC_REF_DEFAULT

#define ADC_REF_DEFAULT ADC_REFCTRL_REFSEL_INTVCC1

Definition at line 240 of file periph_conf.h.

◆ CLOCK_CORECLOCK

#define CLOCK_CORECLOCK MHZ(120)

Definition at line 33 of file periph_conf.h.

◆ DAC_CLOCK

#define DAC_CLOCK SAM0_GCLK_TIMER

Definition at line 260 of file periph_conf.h.

◆ DAC_VREF

#define DAC_VREF DAC_CTRLB_REFSEL_VREFPU

Definition at line 264 of file periph_conf.h.

◆ EXTERNAL_OSC32_SOURCE

#define EXTERNAL_OSC32_SOURCE 0

Definition at line 41 of file periph_conf.h.

◆ I2C_NUMOF

#define I2C_NUMOF ARRAY_SIZE(i2c_config)

Definition at line 204 of file periph_conf.h.

◆ PWM_0_EN

#define PWM_0_EN 1

Definition at line 119 of file periph_conf.h.

◆ PWM_NUMOF

#define PWM_NUMOF ARRAY_SIZE(pwm_config)

Definition at line 141 of file periph_conf.h.

◆ RTT_FREQUENCY

#define RTT_FREQUENCY (32768U)

Definition at line 212 of file periph_conf.h.

◆ SPI_NUMOF

#define SPI_NUMOF ARRAY_SIZE(spi_config)

Definition at line 185 of file periph_conf.h.

◆ TIMER_0_CHANNELS

#define TIMER_0_CHANNELS 2

Definition at line 77 of file periph_conf.h.

◆ TIMER_0_ISR

#define TIMER_0_ISR isr_tc0

Definition at line 78 of file periph_conf.h.

◆ TIMER_1_CHANNELS

#define TIMER_1_CHANNELS 2

Definition at line 81 of file periph_conf.h.

◆ TIMER_1_ISR

#define TIMER_1_ISR isr_tc2

Definition at line 82 of file periph_conf.h.

◆ TIMER_NUMOF

#define TIMER_NUMOF ARRAY_SIZE(timer_config)

Definition at line 84 of file periph_conf.h.

◆ UART_0_ISR

#define UART_0_ISR isr_sercom3_2

Definition at line 109 of file periph_conf.h.

◆ UART_0_ISR_TX

#define UART_0_ISR_TX isr_sercom3_0

Definition at line 110 of file periph_conf.h.

◆ UART_NUMOF

#define UART_NUMOF ARRAY_SIZE(uart_config)

Definition at line 112 of file periph_conf.h.

◆ ULTRA_LOW_POWER_INTERNAL_OSC_SOURCE

#define ULTRA_LOW_POWER_INTERNAL_OSC_SOURCE 1

Definition at line 42 of file periph_conf.h.

◆ USE_VREG_BUCK

#define USE_VREG_BUCK (1)

Enable the internal DC/DC converter The board is equipped with the necessary inductor.

Definition at line 49 of file periph_conf.h.

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 242 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_config

const pwm_conf_t pwm_config[]

static

Initial value:

= {
 
}

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.

◆ spi_config

const spi_conf_t spi_config[]

static

Definition at line 148 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.

Detailed Description

Macros

desired core clock frequency

32kHz Oscillator configuration

Timer peripheral configuration

UART configuration

PWM configuration

SPI configuration

I2C configuration

RTT configuration

ADC Configuration

DAC configuration

USB peripheral configuration

Macro Definition Documentation

◆ ADC_NEG_INPUT

◆ ADC_NUMOF

◆ ADC_PRESCALER

◆ ADC_REF_DEFAULT

◆ CLOCK_CORECLOCK

◆ DAC_CLOCK

◆ DAC_VREF

◆ EXTERNAL_OSC32_SOURCE

◆ I2C_NUMOF

◆ PWM_0_EN

◆ PWM_NUMOF

◆ RTT_FREQUENCY

◆ SPI_NUMOF

◆ TIMER_0_CHANNELS

◆ TIMER_0_ISR

◆ TIMER_1_CHANNELS

◆ TIMER_1_ISR

◆ TIMER_NUMOF

◆ UART_0_ISR

◆ UART_0_ISR_TX

◆ UART_NUMOF

◆ ULTRA_LOW_POWER_INTERNAL_OSC_SOURCE

◆ USE_VREG_BUCK

Variable Documentation

◆ adc_channels

◆ i2c_config

◆ pwm_config

◆ sam_usbdev_config

◆ spi_config

◆ timer_config

◆ uart_config