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/*
* Copyright (c) 2016-2018, STMicroelectronics - All Rights Reserved
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef STM32_I2C_H
#define STM32_I2C_H
#include <stdint.h>
#include <utils_def.h>
/* Bit definition for I2C_CR1 register */
#define I2C_CR1_PE BIT(0)
#define I2C_CR1_TXIE BIT(1)
#define I2C_CR1_RXIE BIT(2)
#define I2C_CR1_ADDRIE BIT(3)
#define I2C_CR1_NACKIE BIT(4)
#define I2C_CR1_STOPIE BIT(5)
#define I2C_CR1_TCIE BIT(6)
#define I2C_CR1_ERRIE BIT(7)
#define I2C_CR1_DNF GENMASK(11, 8)
#define I2C_CR1_ANFOFF BIT(12)
#define I2C_CR1_SWRST BIT(13)
#define I2C_CR1_TXDMAEN BIT(14)
#define I2C_CR1_RXDMAEN BIT(15)
#define I2C_CR1_SBC BIT(16)
#define I2C_CR1_NOSTRETCH BIT(17)
#define I2C_CR1_WUPEN BIT(18)
#define I2C_CR1_GCEN BIT(19)
#define I2C_CR1_SMBHEN BIT(22)
#define I2C_CR1_SMBDEN BIT(21)
#define I2C_CR1_ALERTEN BIT(22)
#define I2C_CR1_PECEN BIT(23)
/* Bit definition for I2C_CR2 register */
#define I2C_CR2_SADD GENMASK(9, 0)
#define I2C_CR2_RD_WRN BIT(10)
#define I2C_CR2_RD_WRN_OFFSET 10U
#define I2C_CR2_ADD10 BIT(11)
#define I2C_CR2_HEAD10R BIT(12)
#define I2C_CR2_START BIT(13)
#define I2C_CR2_STOP BIT(14)
#define I2C_CR2_NACK BIT(15)
#define I2C_CR2_NBYTES GENMASK(23, 16)
#define I2C_CR2_NBYTES_OFFSET 16U
#define I2C_CR2_RELOAD BIT(24)
#define I2C_CR2_AUTOEND BIT(25)
#define I2C_CR2_PECBYTE BIT(26)
/* Bit definition for I2C_OAR1 register */
#define I2C_OAR1_OA1 GENMASK(9, 0)
#define I2C_OAR1_OA1MODE BIT(10)
#define I2C_OAR1_OA1EN BIT(15)
/* Bit definition for I2C_OAR2 register */
#define I2C_OAR2_OA2 GENMASK(7, 1)
#define I2C_OAR2_OA2MSK GENMASK(10, 8)
#define I2C_OAR2_OA2NOMASK 0
#define I2C_OAR2_OA2MASK01 BIT(8)
#define I2C_OAR2_OA2MASK02 BIT(9)
#define I2C_OAR2_OA2MASK03 GENMASK(9, 8)
#define I2C_OAR2_OA2MASK04 BIT(10)
#define I2C_OAR2_OA2MASK05 (BIT(8) | BIT(10))
#define I2C_OAR2_OA2MASK06 (BIT(9) | BIT(10))
#define I2C_OAR2_OA2MASK07 GENMASK(10, 8)
#define I2C_OAR2_OA2EN BIT(15)
/* Bit definition for I2C_TIMINGR register */
#define I2C_TIMINGR_SCLL GENMASK(7, 0)
#define I2C_TIMINGR_SCLH GENMASK(15, 8)
#define I2C_TIMINGR_SDADEL GENMASK(19, 16)
#define I2C_TIMINGR_SCLDEL GENMASK(23, 20)
#define I2C_TIMINGR_PRESC GENMASK(31, 28)
/* Bit definition for I2C_TIMEOUTR register */
#define I2C_TIMEOUTR_TIMEOUTA GENMASK(11, 0)
#define I2C_TIMEOUTR_TIDLE BIT(12)
#define I2C_TIMEOUTR_TIMOUTEN BIT(15)
#define I2C_TIMEOUTR_TIMEOUTB GENMASK(27, 16)
#define I2C_TIMEOUTR_TEXTEN BIT(31)
/* Bit definition for I2C_ISR register */
#define I2C_ISR_TXE BIT(0)
#define I2C_ISR_TXIS BIT(1)
#define I2C_ISR_RXNE BIT(2)
#define I2C_ISR_ADDR BIT(3)
#define I2C_ISR_NACKF BIT(4)
#define I2C_ISR_STOPF BIT(5)
#define I2C_ISR_TC BIT(6)
#define I2C_ISR_TCR BIT(7)
#define I2C_ISR_BERR BIT(8)
#define I2C_ISR_ARLO BIT(9)
#define I2C_ISR_OVR BIT(10)
#define I2C_ISR_PECERR BIT(11)
#define I2C_ISR_TIMEOUT BIT(12)
#define I2C_ISR_ALERT BIT(13)
#define I2C_ISR_BUSY BIT(15)
#define I2C_ISR_DIR BIT(16)
#define I2C_ISR_ADDCODE GENMASK(23, 17)
/* Bit definition for I2C_ICR register */
#define I2C_ICR_ADDRCF BIT(3)
#define I2C_ICR_NACKCF BIT(4)
#define I2C_ICR_STOPCF BIT(5)
#define I2C_ICR_BERRCF BIT(8)
#define I2C_ICR_ARLOCF BIT(9)
#define I2C_ICR_OVRCF BIT(10)
#define I2C_ICR_PECCF BIT(11)
#define I2C_ICR_TIMOUTCF BIT(12)
#define I2C_ICR_ALERTCF BIT(13)
struct stm32_i2c_init_s {
uint32_t timing; /* Specifies the I2C_TIMINGR_register value
* This parameter is calculated by referring
* to I2C initialization section in Reference
* manual.
*/
uint32_t own_address1; /* Specifies the first device own address.
* This parameter can be a 7-bit or 10-bit
* address.
*/
uint32_t addressing_mode; /* Specifies if 7-bit or 10-bit addressing
* mode is selected.
* This parameter can be a value of @ref
* I2C_ADDRESSING_MODE.
*/
uint32_t dual_address_mode; /* Specifies if dual addressing mode is
* selected.
* This parameter can be a value of @ref
* I2C_DUAL_ADDRESSING_MODE.
*/
uint32_t own_address2; /* Specifies the second device own address
* if dual addressing mode is selected.
* This parameter can be a 7-bit address.
*/
uint32_t own_address2_masks; /* Specifies the acknowledge mask address
* second device own address if dual
* addressing mode is selected.
* This parameter can be a value of @ref
* I2C_OWN_ADDRESS2_MASKS.
*/
uint32_t general_call_mode; /* Specifies if general call mode is
* selected.
* This parameter can be a value of @ref
* I2C_GENERAL_CALL_ADDRESSING_MODE.
*/
uint32_t no_stretch_mode; /* Specifies if nostretch mode is
* selected.
* This parameter can be a value of @ref
* I2C_NOSTRETCH_MODE.
*/
};
enum i2c_state_e {
I2C_STATE_RESET = 0x00U, /* Peripheral is not yet
* initialized.
*/
I2C_STATE_READY = 0x20U, /* Peripheral Initialized
* and ready for use.
*/
I2C_STATE_BUSY = 0x24U, /* An internal process is
* ongoing.
*/
I2C_STATE_BUSY_TX = 0x21U, /* Data Transmission process
* is ongoing.
*/
I2C_STATE_BUSY_RX = 0x22U, /* Data Reception process
* is ongoing.
*/
I2C_STATE_LISTEN = 0x28U, /* Address Listen Mode is
* ongoing.
*/
I2C_STATE_BUSY_TX_LISTEN = 0x29U, /* Address Listen Mode
* and Data Transmission
* process is ongoing.
*/
I2C_STATE_BUSY_RX_LISTEN = 0x2AU, /* Address Listen Mode
* and Data Reception
* process is ongoing.
*/
I2C_STATE_ABORT = 0x60U, /* Abort user request ongoing. */
I2C_STATE_TIMEOUT = 0xA0U, /* Timeout state. */
I2C_STATE_ERROR = 0xE0U /* Error. */
};
enum i2c_mode_e {
I2C_MODE_NONE = 0x00U, /* No I2C communication on going. */
I2C_MODE_MASTER = 0x10U, /* I2C communication is in Master Mode. */
I2C_MODE_SLAVE = 0x20U, /* I2C communication is in Slave Mode. */
I2C_MODE_MEM = 0x40U /* I2C communication is in Memory Mode. */
};
#define I2C_ERROR_NONE 0x00000000U /* No error */
#define I2C_ERROR_BERR 0x00000001U /* BERR error */
#define I2C_ERROR_ARLO 0x00000002U /* ARLO error */
#define I2C_ERROR_AF 0x00000004U /* ACKF error */
#define I2C_ERROR_OVR 0x00000008U /* OVR error */
#define I2C_ERROR_DMA 0x00000010U /* DMA transfer error */
#define I2C_ERROR_TIMEOUT 0x00000020U /* Timeout error */
#define I2C_ERROR_SIZE 0x00000040U /* Size Management error */
struct i2c_handle_s {
uint32_t i2c_base_addr; /* Registers base address */
struct stm32_i2c_init_s i2c_init; /* Communication parameters */
uint8_t *p_buff; /* Pointer to transfer buffer */
uint16_t xfer_size; /* Transfer size */
uint16_t xfer_count; /* Transfer counter */
uint32_t prev_state; /* Communication previous
* state
*/
uint8_t lock; /* Locking object */
enum i2c_state_e i2c_state; /* Communication state */
enum i2c_mode_e i2c_mode; /* Communication mode */
uint32_t i2c_err; /* Error code */
};
#define I2C_ADDRESSINGMODE_7BIT 0x00000001U
#define I2C_ADDRESSINGMODE_10BIT 0x00000002U
#define I2C_DUALADDRESS_DISABLE 0x00000000U
#define I2C_DUALADDRESS_ENABLE I2C_OAR2_OA2EN
#define I2C_GENERALCALL_DISABLE 0x00000000U
#define I2C_GENERALCALL_ENABLE I2C_CR1_GCEN
#define I2C_NOSTRETCH_DISABLE 0x00000000U
#define I2C_NOSTRETCH_ENABLE I2C_CR1_NOSTRETCH
#define I2C_MEMADD_SIZE_8BIT 0x00000001U
#define I2C_MEMADD_SIZE_16BIT 0x00000002U
#define I2C_RELOAD_MODE I2C_CR2_RELOAD
#define I2C_AUTOEND_MODE I2C_CR2_AUTOEND
#define I2C_SOFTEND_MODE 0x00000000U
#define I2C_NO_STARTSTOP 0x00000000U
#define I2C_GENERATE_STOP (BIT(31) | I2C_CR2_STOP)
#define I2C_GENERATE_START_READ (BIT(31) | I2C_CR2_START | \
I2C_CR2_RD_WRN)
#define I2C_GENERATE_START_WRITE (BIT(31) | I2C_CR2_START)
#define I2C_FLAG_TXE I2C_ISR_TXE
#define I2C_FLAG_TXIS I2C_ISR_TXIS
#define I2C_FLAG_RXNE I2C_ISR_RXNE
#define I2C_FLAG_ADDR I2C_ISR_ADDR
#define I2C_FLAG_AF I2C_ISR_NACKF
#define I2C_FLAG_STOPF I2C_ISR_STOPF
#define I2C_FLAG_TC I2C_ISR_TC
#define I2C_FLAG_TCR I2C_ISR_TCR
#define I2C_FLAG_BERR I2C_ISR_BERR
#define I2C_FLAG_ARLO I2C_ISR_ARLO
#define I2C_FLAG_OVR I2C_ISR_OVR
#define I2C_FLAG_PECERR I2C_ISR_PECERR
#define I2C_FLAG_TIMEOUT I2C_ISR_TIMEOUT
#define I2C_FLAG_ALERT I2C_ISR_ALERT
#define I2C_FLAG_BUSY I2C_ISR_BUSY
#define I2C_FLAG_DIR I2C_ISR_DIR
#define I2C_RESET_CR2 (I2C_CR2_SADD | I2C_CR2_HEAD10R | \
I2C_CR2_NBYTES | I2C_CR2_RELOAD | \
I2C_CR2_RD_WRN)
#define I2C_ANALOGFILTER_ENABLE ((uint32_t)0x00000000U)
#define I2C_ANALOGFILTER_DISABLE I2C_CR1_ANFOFF
int stm32_i2c_init(struct i2c_handle_s *hi2c);
int stm32_i2c_mem_write(struct i2c_handle_s *hi2c, uint16_t dev_addr,
uint16_t mem_addr, uint16_t mem_add_size,
uint8_t *p_data, uint16_t size, uint32_t timeout);
int stm32_i2c_mem_read(struct i2c_handle_s *hi2c, uint16_t dev_addr,
uint16_t mem_addr, uint16_t mem_add_size,
uint8_t *p_data, uint16_t size, uint32_t timeout);
int stm32_i2c_is_device_ready(struct i2c_handle_s *hi2c, uint16_t dev_addr,
uint32_t trials, uint32_t timeout);
int stm32_i2c_config_analog_filter(struct i2c_handle_s *hi2c,
uint32_t analog_filter);
#endif /* STM32_I2C_H */