- Generated on Thu Oct 30 2025 16:42:07 by
1.9.1
I2C configuration structure. More...
I2C configuration structure.
Structure for I2C configuration data.
I2C device configuration The frequency f() of the clock gclk_src must fulfill the condition.
I2C (TWI) configuration options.
I2C configuration structure type.
I2C device configuration.
I2C configuration options.
4 * speed ≤ f(gclk_src) ≤ 512 * speed
if speed ≤ 1 MHz and
12 * speed ≤ f(gclk_src) ≤ 520 * speed
if speed > 1 MHz
Definition at line 295 of file periph_cpu.h.
#include <periph_cpu.h>
Data Fields | |
| TWI_t * | dev |
| Pointer to hardware module registers. More... | |
| pwr_reduction_t | pwr |
| Power Management. | |
| gpio_t | sda_pin |
| SDA GPIO pin. More... | |
| gpio_t | scl_pin |
| SCL GPIO pin. More... | |
| i2c_speed_t | speed |
| Configured bus speed, actual speed may be lower but never higher. More... | |
| cpu_int_lvl_t | int_lvl |
| Serial Interrupt Level. | |
| I2C_TypeDef * | dev |
| USART device used. More... | |
| CMU_Clock_TypeDef | cmu |
| the device CMU channel | |
| IRQn_Type | irq |
| the devices base IRQ channel | |
| uint32_t | speed |
| the bus speed More... | |
| uint8_t | module |
| I2C module identifier. | |
| gpio_t | scl |
| GPIO used as SCL pin. More... | |
| gpio_t | sda |
| GPIO used as SDA pin. More... | |
| bool | scl_pullup |
| Pullup enabled for SCL pin. | |
| bool | sda_pullup |
| Pullup enabled for SDA pin. | |
| uint32_t | addr |
| device base address | |
| I2C_Type * | dev |
| i2c device More... | |
| uint32_t | rcu_mask |
| bit in clock enable register | |
| IRQn_Type | irqn |
| I2C event interrupt number. More... | |
| I2C_Type * | i2c |
| Pointer to hardware module registers. | |
| uint32_t | freq |
| I2C module clock frequency, usually CLOCK_BUSCLOCK or CLOCK_CORECLOCK. | |
| uint32_t | scl_pcr |
| PORT module PCR setting for the SCL pin. | |
| uint32_t | sda_pcr |
| PORT module PCR setting for the SDA pin. | |
| lpc23xx_i2c_t * | dev |
| pointer to the I2C device | |
| uint8_t | irq_prio |
| priority of the I2C IRQ | |
| uint8_t | pinsel_sda |
| PINSEL# of the SDA pin | |
| uint8_t | pinsel_scl |
| PINSEL# of the SCL pin | |
| uint32_t | pinsel_msk_sda |
| SDA PINSEL Mask | |
| uint32_t | pinsel_msk_scl |
| SCL PINSEL Mask | |
| NRF_TWI_Type * | dev |
| hardware device | |
| gpio_t | pin_scl |
| SCL pin. | |
| gpio_t | pin_sda |
| SDA pin. | |
| uint8_t | ppi |
| PPI channel to use. | |
| NRF_TWIM_Type * | dev |
| TWIM hardware device. | |
| SercomI2cm * | dev |
| pointer to the used I2C device | |
| gpio_mux_t | mux |
| alternate function (mux) | |
| uint8_t | gclk_src |
| GCLK source which supplys SERCOM. | |
| uint8_t | flags |
| allow SERCOM to run in standby mode | |
| gpio_af_t | scl_af |
| scl pin alternate function value | |
| gpio_af_t | sda_af |
| sda pin alternate function value | |
| uint8_t | bus |
| APB bus. | |
| uint32_t | rcc_mask |
| bit in clock enable register | |
| uint8_t | irqn |
| I2C event interrupt number. | |
| I2C_TypeDef * i2c_conf_t::dev |
Pointer to hardware module registers.
i2c device
hardware device
Definition at line 296 of file periph_cpu.h.
| I2C_TypeDef* i2c_conf_t::dev |
| I2C_Type* i2c_conf_t::dev |
| IRQn_Type i2c_conf_t::irqn |
I2C event interrupt number.
IRQ number for this module.
Definition at line 459 of file periph_cpu.h.
| gpio_t i2c_conf_t::scl |
| gpio_t i2c_conf_t::scl_pin |
SCL GPIO pin.
used SCL pin
scl pin number
pin used for SCL
Definition at line 299 of file periph_cpu.h.
| gpio_t i2c_conf_t::sda |
| gpio_t i2c_conf_t::sda_pin |
SDA GPIO pin.
used MOSI pin
sda pin number
pin used for SDA
Definition at line 298 of file periph_cpu.h.
| i2c_speed_t i2c_conf_t::speed |
Configured bus speed, actual speed may be lower but never higher.
bus speed in bit/s
Bus speed.
bus speed
I2C bus speed
i2c bus speed
I2C speed.
I2C bus speed.
baudrate used for the bus
Definition at line 300 of file periph_cpu.h.
| uint32_t i2c_conf_t::speed |
1.9.1