107 lines
3.9 KiB
C
107 lines
3.9 KiB
C
/*
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* The MIT License (MIT)
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*
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* Copyright (c) 2021 Renesas Electronics Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef RA_RA_I2C_H_
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#define RA_RA_I2C_H_
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#include <stdint.h>
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#include <stdbool.h>
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#ifdef RA6M5
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// #define R_IIC2_BASE 0x4009F200
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#ifndef R_IIC2
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#define R_IIC2 ((R_IIC0_Type *)0x4009F200)
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#endif
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#endif
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#define RA_I2C_DEF_TIMEOUT 1000 // 1000 ms
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#define RA_I2C_TIMEOUT_STOP_CONDITION 100000 // counts
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#define RA_I2C_TIMEOUT_BUS_BUSY 100000 // counts
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#define RA_I2C_CLOCK_MAX 1000000 // counts
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typedef enum
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{
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RA_I2C_STATUS_Idle = 1,
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RA_I2C_STATUS_Started = 2,
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RA_I2C_STATUS_AddrWriteCompleted = 3,
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RA_I2C_STATUS_DataWriteCompleted = 4,
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RA_I2C_STATUS_DataSendCompleted = 5,
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RA_I2C_STATUS_FirstReceiveCompleted = 5,
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RA_I2C_STATUS_LastReceiveCompleted = 6,
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RA_I2C_STATUS_Stopped = 7,
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} xaction_status_t;
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typedef enum
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{
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RA_I2C_ERROR_OK = 0,
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RA_I2C_ERROR_TMOF = 1,
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RA_I2C_ERROR_AL = 2,
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RA_I2C_ERROR_NACK = 3,
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RA_I2C_ERROR_BUSY = 4,
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} xaction_error_t;
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typedef struct {
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volatile uint32_t m_bytes_transferred;
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volatile uint32_t m_bytes_transfer;
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bool m_fread;
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uint8_t *buf;
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void *next;
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} xaction_unit_t;
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typedef struct {
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xaction_unit_t *units;
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uint32_t m_num_of_units;
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uint32_t m_current;
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uint32_t m_address;
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volatile xaction_status_t m_status;
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xaction_error_t m_error;
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bool m_stop;
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} xaction_t;
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bool ra_i2c_find_af_ch(uint32_t scl, uint32_t sda, uint8_t *ch);
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void ra_i2c_irq_enable(R_IIC0_Type *i2c_inst);
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void ra_i2c_irq_disable(R_IIC0_Type *i2c_inst);
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void ra_i2c_priority(R_IIC0_Type *i2c_inst, uint32_t ipl);
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void ra_i2c_set_baudrate(R_IIC0_Type *i2c_inst, uint32_t baudrate);
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void ra_i2c_clear_IR(R_IIC0_Type *i2c_inst);
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void ra_i2c_init(R_IIC0_Type *i2c_inst, uint32_t scl, uint32_t sda, uint32_t baudrate);
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void ra_i2c_deinit(R_IIC0_Type *i2c_inst);
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void ra_i2c_read_last_byte(R_IIC0_Type *i2c_inst);
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void ra_i2c_stop_condition(R_IIC0_Type *i2c_inst);
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void ra_i2c_abort(R_IIC0_Type *i2c_inst);
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void ra_i2c_xaction_start(R_IIC0_Type *i2c_inst, xaction_t *xaction, bool repeated_start);
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void ra_i2c_xaction_stop(void);
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void ra_i2c_get_clock(uint32_t rateKhz, uint8_t *clockRate, uint8_t *clockRate2);
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void ra_i2c_xunit_write_byte(R_IIC0_Type *i2c_inst, xaction_unit_t *unit);
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void ra_i2c_xunit_read_byte(R_IIC0_Type *i2c_inst, xaction_unit_t *unit);
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void ra_i2c_xunit_init(xaction_unit_t *unit, uint8_t *buf, uint32_t size, bool fread, void *next);
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void ra_i2c_xaction_init(xaction_t *action, xaction_unit_t *units, uint32_t size, uint32_t address, bool stop);
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void iic_master_rxi_isr(void);
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void iic_master_txi_isr(void);
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void iic_master_tei_isr(void);
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void iic_master_eri_isr(void);
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bool ra_i2c_action_execute(R_IIC0_Type *i2c_inst, xaction_t *action, bool repeated_start, uint32_t timeout_ms);
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#endif /* RA_RA_I2C_H_ */
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