i2c_arch.c File Reference

Handling of I2C hardware for STM32. More...

#include "mcu_periph/i2c.h"
#include <BOARD_CONFIG>
#include <libopencm3/stm32/rcc.h>
#include <libopencm3/stm32/gpio.h>
#include <libopencm3/cm3/nvic.h>
#include <libopencm3/cm3/scb.h>
#include "mcu_periph/gpio.h"
#include "mcu_periph/sys_time.h"

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Macros
#define	I2C_SR1_ERR_MASK
#define	BIT_X_IS_SET_IN_REG(X, REG)   (((REG) & (X)) == (X))
#define	__I2C_REG_CRITICAL_ZONE_START   __disable_irq();
#define	__I2C_REG_CRITICAL_ZONE_STOP   __enable_irq();
#define	NVIC_I2C1_IRQ_PRIO   0
#define	NVIC_I2C2_IRQ_PRIO   0
#define	NVIC_I2C3_IRQ_PRIO   0
#define	WD_DELAY   20
#define	WD_RECOVERY_TICKS   18

Enumerations
enum	STMI2CSubTransactionStatus { STMI2C_SubTra_Busy, STMI2C_SubTra_Ready_StopRequested, STMI2C_SubTra_Ready, STMI2C_SubTra_Error }

Functions
static void	__disable_irq (void)
static void	__enable_irq (void)
static void	PPRZ_I2C_SEND_STOP (uint32_t i2c)
static void	PPRZ_I2C_SEND_START (struct i2c_periph *periph)
static enum STMI2CSubTransactionStatus	stmi2c_send (uint32_t i2c, struct i2c_periph *periph, struct i2c_transaction *trans)
static enum STMI2CSubTransactionStatus	stmi2c_read1 (uint32_t i2c, struct i2c_periph *periph, struct i2c_transaction *trans)
static enum STMI2CSubTransactionStatus	stmi2c_read2 (uint32_t i2c, struct i2c_periph *periph, struct i2c_transaction *trans)
static enum STMI2CSubTransactionStatus	stmi2c_readmany (uint32_t i2c, struct i2c_periph *periph, struct i2c_transaction *trans)
static void	i2c_error (struct i2c_periph *periph)
static void	stmi2c_clear_pending_interrupts (uint32_t i2c)
static void	i2c_irq (struct i2c_periph *periph)
void	i2c_setbitrate (struct i2c_periph *periph, int bitrate)
	Set I2C bitrate. More...
void	i2c_event (void)
	i2c_event() function More...
bool	i2c_submit (struct i2c_periph *periph, struct i2c_transaction *t)
	Submit a I2C transaction. More...
bool	i2c_idle (struct i2c_periph *periph)
	Check if I2C bus is idle. More...

Detailed Description

Handling of I2C hardware for STM32.

Definition in file i2c_arch.c.

Macro Definition Documentation

#define __I2C_REG_CRITICAL_ZONE_START   __disable_irq();

Definition at line 70 of file i2c_arch.c.

Referenced by stmi2c_read1(), stmi2c_read2(), and stmi2c_readmany().

#define __I2C_REG_CRITICAL_ZONE_STOP   __enable_irq();

Definition at line 71 of file i2c_arch.c.

Referenced by stmi2c_read1(), stmi2c_read2(), and stmi2c_readmany().

#define BIT_X_IS_SET_IN_REG	(		X,
			REG
	)		(((REG) & (X)) == (X))

Definition at line 61 of file i2c_arch.c.

Referenced by i2c_idle(), LED_SHOW_ACTIVE_BITS(), stmi2c_clear_pending_interrupts(), stmi2c_read1(), stmi2c_read2(), stmi2c_readmany(), and stmi2c_send().

#define I2C_SR1_ERR_MASK

Value:

(I2C_SR1_SMBALERT | \
                          I2C_SR1_TIMEOUT |  \
                          I2C_SR1_PECERR |   \
                          I2C_SR1_OVR |      \
                          I2C_SR1_AF |       \
                          I2C_SR1_ARLO |     \
                          I2C_SR1_BERR)

Definition at line 51 of file i2c_arch.c.

Referenced by i2c_irq().

#define NVIC_I2C1_IRQ_PRIO   0

Definition at line 75 of file i2c_arch.c.

#define NVIC_I2C2_IRQ_PRIO   0

Definition at line 76 of file i2c_arch.c.

#define NVIC_I2C3_IRQ_PRIO   0

Definition at line 77 of file i2c_arch.c.

#define WD_DELAY   20

Definition at line 1244 of file i2c_arch.c.

Referenced by i2c_submit().

#define WD_RECOVERY_TICKS   18

Definition at line 1245 of file i2c_arch.c.

Enumeration Type Documentation

enum STMI2CSubTransactionStatus

Enumerator
STMI2C_SubTra_Busy
STMI2C_SubTra_Ready_StopRequested
STMI2C_SubTra_Ready
STMI2C_SubTra_Error

Definition at line 217 of file i2c_arch.c.

Function Documentation

static void __disable_irq ( void  )

inlinestatic

Definition at line 65 of file i2c_arch.c.

Referenced by i2c_setbitrate(), and i2c_submit().

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static void __enable_irq ( void  )

inlinestatic

Definition at line 66 of file i2c_arch.c.

Referenced by i2c_setbitrate(), and i2c_submit().

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static void i2c_error ( struct i2c_periph *  periph )

inlinestatic

Definition at line 533 of file i2c_arch.c.

References i2c_errors::ack_fail_cnt, i2c_errors::arb_lost_cnt, i2c_errors::er_irq_cnt, i2c_periph::errors, LED_ERROR(), i2c_errors::miss_start_stop_cnt, i2c_errors::over_under_cnt, i2c_errors::pec_recep_cnt, i2c_periph::reg_addr, i2c_errors::smbus_alert_cnt, and i2c_errors::timeout_tlow_cnt.

Referenced by i2c_irq().

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static void i2c_irq ( struct i2c_periph *  periph )

inlinestatic

Definition at line 634 of file i2c_arch.c.

References i2c_periph::errors, i2c_error(), I2C_SR1_ERR_MASK, I2C_TRANSACTION_QUEUE_LEN, I2CFailed, I2CIdle, I2CStartRequested, I2CTransFailed, I2CTransRx, I2CTransTxRx, if(), i2c_errors::last_unexpected_event, LED1_OFF(), LED1_ON(), LED2_OFF(), LED2_ON(), LED_SHOW_ACTIVE_BITS(), i2c_transaction::len_r, PPRZ_I2C_SEND_START(), PPRZ_I2C_SEND_STOP(), i2c_periph::reg_addr, i2c_transaction::status, i2c_periph::status, stmi2c_clear_pending_interrupts(), stmi2c_read1(), stmi2c_read2(), stmi2c_readmany(), stmi2c_send(), STMI2C_SubTra_Busy, STMI2C_SubTra_Error, STMI2C_SubTra_Ready, i2c_periph::trans, i2c_periph::trans_extract_idx, i2c_periph::trans_insert_idx, i2c_transaction::type, i2c_errors::unexpected_event_cnt, and i2c_periph::watchdog.

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static void PPRZ_I2C_SEND_START ( struct i2c_periph *  periph )

inlinestatic

Definition at line 173 of file i2c_arch.c.

References I2CStartRequested, i2c_periph::idx_buf, LED1_OFF(), LED1_ON(), LED2_OFF(), LED2_ON(), LED_SHOW_ACTIVE_BITS(), i2c_periph::reg_addr, i2c_periph::status, and i2c_periph::watchdog.

Referenced by i2c_irq(), and i2c_submit().

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static void PPRZ_I2C_SEND_STOP ( uint32_t  i2c )

inlinestatic

Definition at line 158 of file i2c_arch.c.

References LED1_OFF(), LED1_ON(), LED2_OFF(), and LED2_ON().

Referenced by i2c_irq(), stmi2c_read1(), stmi2c_read2(), and stmi2c_readmany().

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static void stmi2c_clear_pending_interrupts ( uint32_t  i2c )

inlinestatic

Definition at line 597 of file i2c_arch.c.

References BIT_X_IS_SET_IN_REG.

Referenced by i2c_irq().

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static enum STMI2CSubTransactionStatus stmi2c_read1 ( uint32_t  i2c, struct i2c_periph *  periph, struct i2c_transaction *  trans  )

inlinestatic

Definition at line 298 of file i2c_arch.c.

References __I2C_REG_CRITICAL_ZONE_START, __I2C_REG_CRITICAL_ZONE_STOP, BIT_X_IS_SET_IN_REG, i2c_transaction::buf, I2CAddrRdSent, I2CReadingLastByte, I2CStopRequested, I2CTransSuccess, PPRZ_I2C_SEND_STOP(), i2c_transaction::slave_addr, i2c_transaction::status, i2c_periph::status, STMI2C_SubTra_Busy, STMI2C_SubTra_Error, and STMI2C_SubTra_Ready_StopRequested.

Referenced by i2c_irq().

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static enum STMI2CSubTransactionStatus stmi2c_read2 ( uint32_t  i2c, struct i2c_periph *  periph, struct i2c_transaction *  trans  )

inlinestatic

Definition at line 357 of file i2c_arch.c.

References __I2C_REG_CRITICAL_ZONE_START, __I2C_REG_CRITICAL_ZONE_STOP, BIT_X_IS_SET_IN_REG, i2c_transaction::buf, I2CAddrRdSent, I2CReadingByte, I2CStopRequested, I2CTransSuccess, PPRZ_I2C_SEND_STOP(), i2c_transaction::slave_addr, i2c_transaction::status, i2c_periph::status, STMI2C_SubTra_Busy, STMI2C_SubTra_Error, and STMI2C_SubTra_Ready_StopRequested.

Referenced by i2c_irq().

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static enum STMI2CSubTransactionStatus stmi2c_readmany ( uint32_t  i2c, struct i2c_periph *  periph, struct i2c_transaction *  trans  )

inlinestatic

Definition at line 423 of file i2c_arch.c.

References __I2C_REG_CRITICAL_ZONE_START, __I2C_REG_CRITICAL_ZONE_STOP, BIT_X_IS_SET_IN_REG, i2c_transaction::buf, I2CAddrRdSent, I2CReadingByte, I2CStopRequested, I2CTransSuccess, i2c_periph::idx_buf, i2c_transaction::len_r, PPRZ_I2C_SEND_STOP(), i2c_transaction::slave_addr, i2c_transaction::status, i2c_periph::status, STMI2C_SubTra_Busy, STMI2C_SubTra_Error, and STMI2C_SubTra_Ready_StopRequested.

Referenced by i2c_irq().

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static enum STMI2CSubTransactionStatus stmi2c_send ( uint32_t  i2c, struct i2c_periph *  periph, struct i2c_transaction *  trans  )

inlinestatic

Definition at line 226 of file i2c_arch.c.

References BIT_X_IS_SET_IN_REG, i2c_transaction::buf, I2CAddrWrSent, I2CSendingByte, I2CTransSuccess, I2CTransTx, i2c_periph::idx_buf, i2c_transaction::len_w, i2c_transaction::slave_addr, i2c_transaction::status, i2c_periph::status, STMI2C_SubTra_Busy, STMI2C_SubTra_Error, STMI2C_SubTra_Ready, and i2c_transaction::type.

Referenced by i2c_irq().

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