periph_conf.h File Reference

Configuration of CPU peripherals for the Adafruit Grand Central M4 Express. More...

Detailed Description

Configuration of CPU peripherals for the Adafruit Grand Central M4 Express.

Author

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

Gunar Schorcht gunar.nosp@m.@sch.nosp@m.orcht.nosp@m..net

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 L_EXT (L1) of 10uH at VSW pin.

Core clock frequency
#define	CLOCK_CORECLOCK   MHZ(120)

32kHz Oscillator configuration
#define	EXTERNAL_OSC32_SOURCE   1
#define	INTERNAL_OSC32_SOURCE   0
#define	ULTRA_LOW_POWER_INTERNAL_OSC_SOURCE   0

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

I2C configuration
#define	I2C_NUMOF   ARRAY_SIZE(i2c_config)
static const i2c_conf_t	i2c_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 []

RTT configuration
#define	RTT_FREQUENCY   (32768U)

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 []

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

UART configuration
#define	UART_0_ISR   isr_sercom0_2
#define	UART_0_ISR_TX   isr_sercom0_0
#define	UART_1_ISR   isr_sercom4_2
#define	UART_1_ISR_TX   isr_sercom4_0
#define	UART_2_ISR   isr_sercom1_2
#define	UART_2_ISR_TX   isr_sercom1_0
#define	UART_NUMOF   ARRAY_SIZE(uart_config)
static const uart_conf_t	uart_config []

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_PB03, .dev = ADC0 }, 
    { .inputctrl = ADC1_INPUTCTRL_MUXPOS_PC00, .dev = ADC1 }, 
    { .inputctrl = ADC1_INPUTCTRL_MUXPOS_PC01, .dev = ADC1 }, 
    { .inputctrl = ADC1_INPUTCTRL_MUXPOS_PC02, .dev = ADC1 }, 
    { .inputctrl = ADC1_INPUTCTRL_MUXPOS_PC03, .dev = ADC1 }, 
    { .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_PB08, .dev = ADC0 }, 
    { .inputctrl = ADC0_INPUTCTRL_MUXPOS_PB09, .dev = ADC0 }, 
    { .inputctrl = ADC0_INPUTCTRL_MUXPOS_PA04, .dev = ADC0 }, 
    { .inputctrl = ADC0_INPUTCTRL_MUXPOS_PA06, .dev = ADC0 }, 
    { .inputctrl = ADC0_INPUTCTRL_MUXPOS_PA07, .dev = ADC0 }, 
}

Definition at line 66 of file periph_conf.h.

i2c_config

const i2c_conf_t i2c_config[]

static

Initial value:

= {
    {
        .dev      = &(SERCOM3->I2CM),
        .speed    = I2C_SPEED_NORMAL,
        .scl_pin  = GPIO_PIN(PB, 21),   
        .sda_pin  = GPIO_PIN(PB, 20),   
        .mux      = GPIO_MUX_C,
        .gclk_src = SAM0_GCLK_PERIPH,
        .flags    = I2C_FLAG_NONE
    },
    {
        .dev      = &(SERCOM6->I2CM),
        .speed    = I2C_SPEED_NORMAL,
        .scl_pin  = GPIO_PIN(PC, 17),   
        .sda_pin  = GPIO_PIN(PC, 16),   
        .mux      = GPIO_MUX_C,
        .gclk_src = SAM0_GCLK_PERIPH,
        .flags    = I2C_FLAG_NONE
    },
}

Definition at line 105 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 137 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 144 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 267 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 171 of file periph_conf.h.