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periph_conf.h File Reference
Boards » HamiltonIoT Hamilton

Configuration of CPU peripherals for the Hamilton mote. More...

Detailed Description

Configuration of CPU peripherals for the Hamilton mote.

Author
Thomas Eichinger thoma.nosp@m.s.ei.nosp@m.ching.nosp@m.er@f.nosp@m.u-ber.nosp@m.lin..nosp@m.de
Hauke Petersen hauke.nosp@m..pet.nosp@m.ersen.nosp@m.@fu-.nosp@m.berli.nosp@m.n.de
Peter Kietzmann peter.nosp@m..kie.nosp@m.tzman.nosp@m.n@ha.nosp@m.w-ham.nosp@m.burg.nosp@m..de
Michael Andersen m.and.nosp@m.erse.nosp@m.n@ber.nosp@m.kele.nosp@m.y.edu
Hyung-Sin Kim hs.ki.nosp@m.m@be.nosp@m.rkele.nosp@m.y.ed.nosp@m.u

Definition in file periph_conf.h.

#include <stdint.h>
#include "cpu.h"
#include "periph_cpu.h"
+ Include dependency graph for periph_conf.h:
+ This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

External oscillator and clock configuration

There are three choices for selection of CORECLOCK:

  • usage of the 48 MHz DFLL fed by external oscillator running at 32 kHz
  • usage of the PLL fed by the internal 8MHz oscillator divided by 8
  • usage of the internal 8MHz oscillator directly, divided by N if needed

The PLL option allows for the usage of a wider frequency range and a more stable clock with less jitter. This is why this option is default.

The target frequency is computed from the PLL multiplier and the PLL divisor. Use the following formula to compute your values:

CORECLOCK = ((PLL_MUL + 1) * 1MHz) / PLL_DIV

NOTE: The PLL circuit does not run with less than 32MHz while the maximum PLL frequency is 96MHz. So PLL_MUL must be between 31 and 95!

The internal Oscillator used directly can lead to a slightly better power efficiency to the cost of a less stable clock. Use this option when you know what you are doing! The actual core frequency is adjusted as follows:

CORECLOCK = 8MHz / DIV

NOTE: A core clock frequency below 1MHz is not recommended

#define CLOCK_USE_PLL   (1)
 
#define CLOCK_DIV   (1U)
 
#define CLOCK_CORECLOCK   (8000000 / CLOCK_DIV)
 

RTT configuration

#define RTT_FREQUENCY   (32768U) /* in Hz. For changes see `rtt.c` */
 

Timer peripheral configuration

#define TIMER_0_MAX_VALUE   0xffff
 
#define TIMER_0_ISR   isr_tc3
 
#define TIMER_1_ISR   isr_tc4
 
#define TIMER_NUMOF   ARRAY_SIZE(timer_config)
 
static const tc32_conf_t timer_config []
 

ADC Configuration

#define ADC_PRESCALER   ADC_CTRLB_PRESCALER_DIV512
 
#define ADC_NEG_INPUT   ADC_INPUTCTRL_MUXNEG_GND
 
#define ADC_GAIN_FACTOR_DEFAULT   ADC_INPUTCTRL_GAIN_1X
 
#define ADC_REF_DEFAULT   ADC_REFCTRL_REFSEL_INT1V
 
#define ADC_NUMOF   ARRAY_SIZE(adc_channels)
 
static const adc_conf_chan_t adc_channels []
 

PWM configuration

#define PWM_0_EN   1
 
#define PWM_1_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 []
 

Random Number Generator configuration

#define RANDOM_NUMOF   (0U)
 

Macro Definition Documentation

◆ ADC_GAIN_FACTOR_DEFAULT

#define ADC_GAIN_FACTOR_DEFAULT   ADC_INPUTCTRL_GAIN_1X

Definition at line 148 of file periph_conf.h.

◆ ADC_NEG_INPUT

#define ADC_NEG_INPUT   ADC_INPUTCTRL_MUXNEG_GND

Definition at line 147 of file periph_conf.h.

◆ ADC_NUMOF

#define ADC_NUMOF   ARRAY_SIZE(adc_channels)

Definition at line 158 of file periph_conf.h.

◆ ADC_PRESCALER

#define ADC_PRESCALER   ADC_CTRLB_PRESCALER_DIV512

Definition at line 145 of file periph_conf.h.

◆ ADC_REF_DEFAULT

#define ADC_REF_DEFAULT   ADC_REFCTRL_REFSEL_INT1V

Definition at line 149 of file periph_conf.h.

◆ CLOCK_CORECLOCK

#define CLOCK_CORECLOCK   (8000000 / CLOCK_DIV)

Definition at line 86 of file periph_conf.h.

◆ CLOCK_DIV

#define CLOCK_DIV   (1U)

Definition at line 84 of file periph_conf.h.

◆ CLOCK_USE_PLL

#define CLOCK_USE_PLL   (1)

Definition at line 68 of file periph_conf.h.

◆ I2C_NUMOF

#define I2C_NUMOF   ARRAY_SIZE(i2c_config)

Definition at line 240 of file periph_conf.h.

◆ PWM_0_EN

#define PWM_0_EN   1

Definition at line 165 of file periph_conf.h.

◆ PWM_1_EN

#define PWM_1_EN   1

Definition at line 166 of file periph_conf.h.

◆ PWM_NUMOF

#define PWM_NUMOF   ARRAY_SIZE(pwm_config)

Definition at line 196 of file periph_conf.h.

◆ RANDOM_NUMOF

#define RANDOM_NUMOF   (0U)

Definition at line 247 of file periph_conf.h.

◆ RTT_FREQUENCY

#define RTT_FREQUENCY   (32768U) /* in Hz. For changes see `rtt.c` */

Definition at line 95 of file periph_conf.h.

◆ SPI_NUMOF

#define SPI_NUMOF   ARRAY_SIZE(spi_config)

Definition at line 222 of file periph_conf.h.

◆ TIMER_0_ISR

#define TIMER_0_ISR   isr_tc3

Definition at line 133 of file periph_conf.h.

◆ TIMER_0_MAX_VALUE

#define TIMER_0_MAX_VALUE   0xffff

Definition at line 130 of file periph_conf.h.

◆ TIMER_1_ISR

#define TIMER_1_ISR   isr_tc4

Definition at line 134 of file periph_conf.h.

◆ TIMER_NUMOF

#define TIMER_NUMOF   ARRAY_SIZE(timer_config)

Definition at line 136 of file periph_conf.h.

Variable Documentation

◆ adc_channels

const adc_conf_chan_t adc_channels[]
static
Initial value:
= {
{ .inputctrl = ADC_INPUTCTRL_MUXPOS_PA06 },
{ .inputctrl = ADC_INPUTCTRL_MUXPOS_PA07 },
{ .inputctrl = ADC_INPUTCTRL_MUXPOS_PA08 },
}
ADC_INPUTCTRL_MUXPOS_PA08
#define ADC_INPUTCTRL_MUXPOS_PA08
Alias for PIN16.
Definition periph_cpu.h:135
ADC_INPUTCTRL_MUXPOS_PA07
#define ADC_INPUTCTRL_MUXPOS_PA07
Alias for PIN7.
Definition periph_cpu.h:126
ADC_INPUTCTRL_MUXPOS_PA06
#define ADC_INPUTCTRL_MUXPOS_PA06
Alias for PIN6.
Definition periph_cpu.h:125

Definition at line 151 of file periph_conf.h.

◆ i2c_config

const i2c_conf_t i2c_config[]
static
Initial value:
= {
{
.dev = &(SERCOM3->I2CM),
.speed = I2C_SPEED_FAST,
.scl_pin = GPIO_PIN(PA, 17),
.sda_pin = GPIO_PIN(PA, 16),
.mux = GPIO_MUX_D,
.gclk_src = SAM0_GCLK_MAIN,
.flags = I2C_FLAG_NONE
}
}
GPIO_PIN
#define GPIO_PIN(x, y)
Define a CPU specific GPIO pin generator macro.
Definition periph_cpu.h:46
I2C_SPEED_FAST
@ I2C_SPEED_FAST
fast mode: ~400 kbit/s
Definition periph_cpu.h:279
PA
@ PA
port A
Definition periph_cpu_common.h:99
I2C_FLAG_NONE
@ I2C_FLAG_NONE
No flags set.
Definition periph_cpu_common.h:520
GPIO_MUX_D
@ GPIO_MUX_D
select peripheral function D
Definition periph_cpu_common.h:247
SAM0_GCLK_MAIN
#define SAM0_GCLK_MAIN
120 MHz main clock
Definition periph_cpu.h:74

Definition at line 229 of file periph_conf.h.

◆ pwm_config

const pwm_conf_t pwm_config[]
static
Initial value:
= {
}

Definition at line 186 of file periph_conf.h.

◆ spi_config

const spi_conf_t spi_config[]
static
Initial value:
= {
{
.dev = &SERCOM4->SPI,
.miso_pin = GPIO_PIN(PC, 19),
.mosi_pin = GPIO_PIN(PB, 30),
.clk_pin = GPIO_PIN(PC, 18),
.miso_mux = GPIO_MUX_F,
.mosi_mux = GPIO_MUX_F,
.clk_mux = GPIO_MUX_F,
.miso_pad = SPI_PAD_MISO_0,
.mosi_pad = SPI_PAD_MOSI_2_SCK_3,
.gclk_src = SAM0_GCLK_MAIN,
}
}
PB
@ PB
port B
Definition periph_cpu_common.h:100
PC
@ PC
port C
Definition periph_cpu_common.h:101
SPI_PAD_MISO_0
@ SPI_PAD_MISO_0
use pad 0 for MISO line
Definition periph_cpu_common.h:440
GPIO_MUX_F
@ GPIO_MUX_F
select peripheral function F
Definition periph_cpu_common.h:249
SPI_PAD_MOSI_2_SCK_3
@ SPI_PAD_MOSI_2_SCK_3
use pad 2 for MOSI, pad 3 for SCK
Definition periph_cpu_common.h:451

Definition at line 203 of file periph_conf.h.

◆ timer_config

const tc32_conf_t timer_config[]
static
Initial value:
= {
{
.dev = TC3,
.irq = TC3_IRQn,
.pm_mask = PM_APBCMASK_TC3,
.gclk_ctrl = GCLK_CLKCTRL_ID_TCC2_TC3,
.gclk_src = SAM0_GCLK_MAIN,
.flags = TC_CTRLA_MODE_COUNT16,
},
{
.dev = TC4,
.irq = TC4_IRQn,
.pm_mask = PM_APBCMASK_TC4 | PM_APBCMASK_TC5,
.gclk_ctrl = GCLK_CLKCTRL_ID_TC4_TC5,
.gclk_src = SAM0_GCLK_MAIN,
.flags = TC_CTRLA_MODE_COUNT32,
}
}

Definition at line 103 of file periph_conf.h.