stm32_twi1.c File Reference

STM32F I2C bus 1 initialization. More...

#include <cfg/os.h>
#include <cfg/clock.h>
#include <cfg/arch.h>
#include <cfg/twi.h>
#include <cfg/arch/gpio.h>
#include <sys/atom.h>
#include <sys/event.h>
#include <sys/timer.h>
#include <dev/irqreg.h>
#include <dev/gpio.h>
#include <dev/twif.h>
#include <arch/cm3/stm/stm32xxxx.h>
#include <arch/cm3/stm/stm32xxxx_gpio.h>
#include <arch/cm3/stm/stm32xxxx_rcc.h>
#include <arch/cm3/stm/stm32_twi.h>

Include dependency graph for stm32_twi1.c:

Defines
#define	I2C_PORT   NUTGPIO_PORTB
	I2CBUS1 GPIO configuartion and assignment. F1/L1/F2/F4: SMBA PB5 SCL PB6 PB8 SDA PB7 PB9.
#define	I2CBUS1_SDA_PIN   7
#define	I2CBUS1_SCL_PIN   6
Functions
int	Stm32I2cBus1Recover (void)
	Unlock a broken slave by clocking 8 SCL pulses manually.
int	Stm32I2cBus1Init (void)
	Processor specific Hardware Initiliaization.
Variables
NUTTWIBUS	Stm32TwiBus_1
	TWI/I2C bus structure.

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Detailed Description

STM32F I2C bus 1 initialization.

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Define Documentation

#define I2C_PORT   NUTGPIO_PORTB

I2CBUS1 GPIO configuartion and assignment. F1/L1/F2/F4: SMBA PB5 SCL PB6 PB8 SDA PB7 PB9.

Referenced by Stm32I2cBus1Init(), and Stm32I2cBus1Recover().

#define I2CBUS1_SDA_PIN   7

Referenced by Stm32I2cBus1Init(), and Stm32I2cBus1Recover().

#define I2CBUS1_SCL_PIN   6

Referenced by Stm32I2cBus1Init(), and Stm32I2cBus1Recover().

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Function Documentation

int Stm32I2cBus1Recover

(

void

)

Unlock a broken slave by clocking 8 SCL pulses manually.

References _BV, GPIO_CFG_MULTIDRIVE, GPIO_CFG_OUTPUT, GpioPinSetHigh, GpioPinSetLow, GpioPortConfigSet(), I2C_PORT, I2CBUS1_SCL_PIN, I2CBUS1_SDA_PIN, and NutMicroDelay().

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int Stm32I2cBus1Init

(

void

)

Processor specific Hardware Initiliaization.

References _BV, DISABLE, DMA_Disable(), DMA_Init(), ENABLE, GPIO_AF_I2C1, GPIO_CFG_MULTIDRIVE, GPIO_CFG_OUTPUT, GPIO_PinAFConfig(), GPIO_PinRemapConfig(), GPIO_Remap_I2C1, GpioPortConfigSet(), I2C1_DMA_CHANNEL_RX, I2C1_DMA_CHANNEL_TX, I2C1_ER_IRQn, I2C1_EV_IRQn, I2C_PORT, I2CBUS1_SCL_PIN, I2CBUS1_SDA_PIN, NVIC_SetPriority(), NVIC_SetPriorityGrouping(), RCC_APB1Periph_I2C1, RCC_APB1PeriphClockCmd(), and RCC_APB1PeriphResetCmd().

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Variable Documentation

NUTTWIBUS Stm32TwiBus_1

Initial value:

 {
    I2C1_BASE,              
   &sig_TWI1_EV,            
   &sig_TWI1_ER,            
    NULL,                   
    NULL,                   




    0,
    0,

    Stm32I2cBus1Init,       
    Stm32I2cBus1Recover,    
}

TWI/I2C bus structure.