arduino-esp32/tools/sdk/include/esp32/soc/i2c_struct.h
2016-10-06 07:09:44 -06:00

290 lines
18 KiB
C
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef _SOC_I2C_STRUCT_H_
#define _SOC_I2C_STRUCT_H_
typedef volatile struct {
union {
struct {
uint32_t scl_low_period:14; /*This register is used to configure the low level width of SCL clock.*/
uint32_t reserved14: 18;
};
uint32_t val;
} scl_low_period;
union {
struct {
uint32_t sda_force_out: 1; /*1normally output sda data 0: exchange the function of sda_o and sda_oe (sda_o is the original internal output sda signal sda_oe is the enable bit for the internal output sda signal)*/
uint32_t scl_force_out: 1; /*1normally output scl clock 0: exchange the function of scl_o and scl_oe (scl_o is the original internal output scl signal scl_oe is the enable bit for the internal output scl signal)*/
uint32_t sample_scl_level: 1; /*Set this bit to sample data in SCL low level. clear this bit to sample data in SCL high level.*/
uint32_t reserved3: 1;
uint32_t ms_mode: 1; /*Set this bit to configure the module as i2c master clear this bit to configure the module as i2c slave.*/
uint32_t trans_start: 1; /*Set this bit to start sending data in tx_fifo.*/
uint32_t tx_lsb_first: 1; /*This bit is used to control the sending mode for data need to be send. 1receive data from most significant bit 0receive data from least significant bit*/
uint32_t rx_lsb_first: 1; /*This bit is used to control the storage mode for received data. 1receive data from most significant bit 0receive data from least significant bit*/
uint32_t clk_en: 1; /*This is the clock gating control bit for reading or writing registers.*/
uint32_t reserved9: 23;
};
uint32_t val;
} ctr;
union {
struct {
uint32_t ack_rec: 1; /*This register stores the value of ACK bit.*/
uint32_t slave_rw: 1; /*when in slave mode 1master read slave 0: master write slave.*/
uint32_t time_out: 1; /*when I2C takes more than time_out_reg clocks to receive a data then this register changes to high level.*/
uint32_t arb_lost: 1; /*when I2C lost control of SDA line this register changes to high level.*/
uint32_t bus_busy: 1; /*1:I2C bus is busy transferring data. 0:I2C bus is in idle state.*/
uint32_t slave_addressed: 1; /*when configured as i2c slave and the address send by master is equal to slave's address then this bit will be high level.*/
uint32_t byte_trans: 1; /*This register changes to high level when one byte is transferred.*/
uint32_t reserved7: 1;
uint32_t rx_fifo_cnt: 6; /*This register represent the amount of data need to send.*/
uint32_t reserved14: 4;
uint32_t tx_fifo_cnt: 6; /*This register stores the amount of received data in ram.*/
uint32_t scl_main_state_last: 3; /*This register stores the value of state machine for i2c module. 3'h0: SCL_MAIN_IDLE 3'h1: SCL_ADDRESS_SHIFT 3'h2: SCL_ACK_ADDRESS 3'h3: SCL_RX_DATA 3'h4 SCL_TX_DATA 3'h5:SCL_SEND_ACK 3'h6:SCL_WAIT_ACK*/
uint32_t reserved27: 1;
uint32_t scl_state_last: 3; /*This register stores the value of state machine to produce SCL. 3'h0: SCL_IDLE 3'h1:SCL_START 3'h2:SCL_LOW_EDGE 3'h3: SCL_LOW 3'h4:SCL_HIGH_EDGE 3'h5:SCL_HIGH 3'h6:SCL_STOP*/
uint32_t reserved31: 1;
};
uint32_t val;
} status_reg;
union {
struct {
uint32_t tout: 20; /*This register is used to configure the max clock number of receiving a data.*/
uint32_t reserved20:12;
};
uint32_t val;
} timeout;
union {
struct {
uint32_t addr: 15; /*when configured as i2c slave this register is used to configure slave's address.*/
uint32_t reserved15: 16;
uint32_t en_10bit: 1; /*This register is used to enable slave 10bit address mode.*/
};
uint32_t val;
} slave_addr;
union {
struct {
uint32_t rx_fifo_start_addr: 5; /*This is the offset address of the last receiving data as described in nonfifo_rx_thres_register.*/
uint32_t rx_fifo_end_addr: 5; /*This is the offset address of the first receiving data as described in nonfifo_rx_thres_register.*/
uint32_t tx_fifo_start_addr: 5; /*This is the offset address of the first sending data as described in nonfifo_tx_thres register.*/
uint32_t tx_fifo_end_addr: 5; /*This is the offset address of the last sending data as described in nonfifo_tx_thres register.*/
uint32_t reserved20: 12;
};
uint32_t val;
} fifo_st;
union {
struct {
uint32_t rx_fifo_full_thrhd: 5;
uint32_t tx_fifo_empty_thrhd:5; /*Config tx_fifo empty threhd value when using apb fifo access*/
uint32_t nonfifo_en: 1; /*Set this bit to enble apb nonfifo access.*/
uint32_t fifo_addr_cfg_en: 1; /*When this bit is set to 1 then the byte after address represent the offset address of I2C Slave's ram.*/
uint32_t rx_fifo_rst: 1; /*Set this bit to reset rx fifo when using apb fifo access.*/
uint32_t tx_fifo_rst: 1; /*Set this bit to reset tx fifo when using apb fifo access.*/
uint32_t nonfifo_rx_thres: 6; /*when I2C receives more than nonfifo_rx_thres data it will produce rx_send_full_int_raw interrupt and update the current offset address of the receiving data.*/
uint32_t nonfifo_tx_thres: 6; /*when I2C sends more than nonfifo_tx_thres data it will produce tx_send_empty_int_raw interrupt and update the current offset address of the sending data.*/
uint32_t reserved26: 6;
};
uint32_t val;
} fifo_conf;
union {
struct {
uint8_t data; /*The register represent the byte data read from rx_fifo when use apb fifo access*/
uint8_t reserved[3];
};
uint32_t val;
} fifo_data;
union {
struct {
uint32_t rx_fifo_full: 1; /*The raw interrupt status bit for rx_fifo full when use apb fifo access.*/
uint32_t tx_fifo_empty: 1; /*The raw interrupt status bit for tx_fifo empty when use apb fifo access.*/
uint32_t rx_fifo_ovf: 1; /*The raw interrupt status bit for receiving data overflow when use apb fifo access.*/
uint32_t end_detect: 1; /*The raw interrupt status bit for end_detect_int interrupt. when I2C deals with the END command it will produce end_detect_int interrupt.*/
uint32_t slave_tran_comp: 1; /*The raw interrupt status bit for slave_tran_comp_int interrupt. when I2C Slave detects the STOP bit it will produce slave_tran_comp_int interrupt.*/
uint32_t arbitration_lost: 1; /*The raw interrupt status bit for arbitration_lost_int interrupt.when I2C lost the usage right of I2C BUS it will produce arbitration_lost_int interrupt.*/
uint32_t master_tran_comp: 1; /*The raw interrupt status bit for master_tra_comp_int interrupt. when I2C Master sends or receives a byte it will produce master_tran_comp_int interrupt.*/
uint32_t trans_complete: 1; /*The raw interrupt status bit for trans_complete_int interrupt. when I2C Master finished STOP command it will produce trans_complete_int interrupt.*/
uint32_t time_out: 1; /*The raw interrupt status bit for time_out_int interrupt. when I2C takes a lot of time to receive a data it will produce time_out_int interrupt.*/
uint32_t trans_start: 1; /*The raw interrupt status bit for trans_start_int interrupt. when I2C sends the START bit it will produce trans_start_int interrupt.*/
uint32_t ack_err: 1; /*The raw interrupt status bit for ack_err_int interrupt. when I2C receives a wrong ACK bit it will produce ack_err_int interrupt..*/
uint32_t rx_rec_full: 1; /*The raw interrupt status bit for rx_rec_full_int interrupt. when I2C receives more data than nonfifo_rx_thres it will produce rx_rec_full_int interrupt.*/
uint32_t tx_send_empty: 1; /*The raw interrupt status bit for tx_send_empty_int interrupt.when I2C sends more data than nonfifo_tx_thres it will produce tx_send_empty_int interrupt..*/
uint32_t reserved13: 19;
};
uint32_t val;
} int_raw;
union {
struct {
uint32_t rx_fifo_full: 1; /*Set this bit to clear the rx_fifo_full_int interrupt.*/
uint32_t tx_fifo_empty: 1; /*Set this bit to clear the tx_fifo_empty_int interrupt.*/
uint32_t rx_fifo_ovf: 1; /*Set this bit to clear the rx_fifo_ovf_int interrupt.*/
uint32_t end_detect: 1; /*Set this bit to clear the end_detect_int interrupt.*/
uint32_t slave_tran_comp: 1; /*Set this bit to clear the slave_tran_comp_int interrupt.*/
uint32_t arbitration_lost: 1; /*Set this bit to clear the arbitration_lost_int interrupt.*/
uint32_t master_tran_comp: 1; /*Set this bit to clear the master_tran_comp interrupt.*/
uint32_t trans_complete: 1; /*Set this bit to clear the trans_complete_int interrupt.*/
uint32_t time_out: 1; /*Set this bit to clear the time_out_int interrupt.*/
uint32_t trans_start: 1; /*Set this bit to clear the trans_start_int interrupt.*/
uint32_t ack_err: 1; /*Set this bit to clear the ack_err_int interrupt.*/
uint32_t rx_rec_full: 1; /*Set this bit to clear the rx_rec_full_int interrupt.*/
uint32_t tx_send_empty: 1; /*Set this bit to clear the tx_send_empty_int interrupt.*/
uint32_t reserved13: 19;
};
uint32_t val;
} int_clr;
union {
struct {
uint32_t rx_fifo_full: 1; /*The enable bit for rx_fifo_full_int interrupt.*/
uint32_t tx_fifo_empty: 1; /*The enable bit for tx_fifo_empty_int interrupt.*/
uint32_t rx_fifo_ovf: 1; /*The enable bit for rx_fifo_ovf_int interrupt.*/
uint32_t end_detect: 1; /*The enable bit for end_detect_int interrupt.*/
uint32_t slave_tran_comp: 1; /*The enable bit for slave_tran_comp_int interrupt.*/
uint32_t arbitration_lost: 1; /*The enable bit for arbitration_lost_int interrupt.*/
uint32_t master_tran_comp: 1; /*The enable bit for master_tran_comp_int interrupt.*/
uint32_t trans_complete: 1; /*The enable bit for trans_complete_int interrupt.*/
uint32_t time_out: 1; /*The enable bit for time_out_int interrupt.*/
uint32_t trans_start: 1; /*The enable bit for trans_start_int interrupt.*/
uint32_t ack_err: 1; /*The enable bit for ack_err_int interrupt.*/
uint32_t rx_rec_full: 1; /*The enable bit for rx_rec_full_int interrupt.*/
uint32_t tx_send_empty: 1; /*The enable bit for tx_send_empty_int interrupt.*/
uint32_t reserved13: 19;
};
uint32_t val;
} int_ena;
union {
struct {
uint32_t rx_fifo_full: 1; /*The masked interrupt status for rx_fifo_full_int interrupt.*/
uint32_t tx_fifo_empty: 1; /*The masked interrupt status for tx_fifo_empty_int interrupt.*/
uint32_t rx_fifo_ovf: 1; /*The masked interrupt status for rx_fifo_ovf_int interrupt.*/
uint32_t end_detect: 1; /*The masked interrupt status for end_detect_int interrupt.*/
uint32_t slave_tran_comp: 1; /*The masked interrupt status for slave_tran_comp_int interrupt.*/
uint32_t arbitration_lost: 1; /*The masked interrupt status for arbitration_lost_int interrupt.*/
uint32_t master_tran_comp: 1; /*The masked interrupt status for master_tran_comp_int interrupt.*/
uint32_t trans_complete: 1; /*The masked interrupt status for trans_complete_int interrupt.*/
uint32_t time_out: 1; /*The masked interrupt status for time_out_int interrupt.*/
uint32_t trans_start: 1; /*The masked interrupt status for trans_start_int interrupt.*/
uint32_t ack_err: 1; /*The masked interrupt status for ack_err_int interrupt.*/
uint32_t rx_rec_full: 1; /*The masked interrupt status for rx_rec_full_int interrupt.*/
uint32_t tx_send_empty: 1; /*The masked interrupt status for tx_send_empty_int interrupt.*/
uint32_t reserved13: 19;
};
uint32_t val;
} int_status;
union {
struct {
uint32_t time: 10; /*This register is used to configure the clock num I2C used to hold the data after the negedge of SCL.*/
uint32_t reserved10: 22;
};
uint32_t val;
} sda_hold;
union {
struct {
uint32_t time: 10; /*This register is used to configure the clock num I2C used to sample data on SDA after the posedge of SCL*/
uint32_t reserved10: 22;
};
uint32_t val;
} sda_sample;
union {
struct {
uint32_t period: 14; /*This register is used to configure the clock num during SCL is low level.*/
uint32_t reserved14: 18;
};
uint32_t val;
} scl_high_period;
uint32_t reserved_3c;
union {
struct {
uint32_t time: 10; /*This register is used to configure the clock num between the negedge of SDA and negedge of SCL for start mark.*/
uint32_t reserved10: 22;
};
uint32_t val;
} scl_start_hold;
union {
struct {
uint32_t time: 10; /*This register is used to configure the clock num between the posedge of SCL and the negedge of SDA for restart mark.*/
uint32_t reserved10: 22;
};
uint32_t val;
} scl_rstart_setup;
union {
struct {
uint32_t time: 14; /*This register is used to configure the clock num after the STOP bit's posedge.*/
uint32_t reserved14: 18;
};
uint32_t val;
} scl_stop_hold;
union {
struct {
uint32_t time: 10; /*This register is used to configure the clock num between the posedge of SCL and the posedge of SDA.*/
uint32_t reserved10: 22;
};
uint32_t val;
} scl_stop_setup;
union {
struct {
uint32_t thres: 3; /*When input SCL's pulse width is smaller than this register value I2C ignores this pulse.*/
uint32_t en: 1; /*This is the filter enable bit for SCL.*/
uint32_t reserved4: 28;
};
uint32_t val;
} scl_filter_cfg;
union {
struct {
uint32_t thres: 3; /*When input SCL's pulse width is smaller than this register value I2C ignores this pulse.*/
uint32_t en: 1; /*This is the filter enable bit for SDA.*/
uint32_t reserved4: 28;
};
uint32_t val;
} sda_filter_cfg;
union {
struct {
uint32_t byte_num: 8; /*Byte_num represent the number of data need to be send or data need to be received.*/
uint32_t ack_en: 1; /*ack_check_en ack_exp and ack value are used to control the ack bit.*/
uint32_t ack_exp: 1; /*ack_check_en ack_exp and ack value are used to control the ack bit.*/
uint32_t ack_val: 1; /*ack_check_en ack_exp and ack value are used to control the ack bit.*/
uint32_t op_code: 3; /*op_code is the command 0RSTART 1WRITE 2READ 3STOP . 4:END.*/
uint32_t reserved14: 17;
uint32_t done: 1; /*When command0 is done in I2C Master mode this bit changes to high level.*/
};
uint32_t val;
} command[16];
uint32_t reserved_98;
uint32_t reserved_9c;
uint32_t reserved_a0;
uint32_t reserved_a4;
uint32_t reserved_a8;
uint32_t reserved_ac;
uint32_t reserved_b0;
uint32_t reserved_b4;
uint32_t reserved_b8;
uint32_t reserved_bc;
uint32_t reserved_c0;
uint32_t reserved_c4;
uint32_t reserved_c8;
uint32_t reserved_cc;
uint32_t reserved_d0;
uint32_t reserved_d4;
uint32_t reserved_d8;
uint32_t reserved_dc;
uint32_t reserved_e0;
uint32_t reserved_e4;
uint32_t reserved_e8;
uint32_t reserved_ec;
uint32_t reserved_f0;
uint32_t reserved_f4;
uint32_t date; /**/
uint32_t reserved_fc;
uint32_t fifo_start_addr; /*This the start address for ram when use apb nonfifo access.*/
} i2c_dev_t;
extern i2c_dev_t I2C0;
extern i2c_dev_t I2C1;
#endif /* _SOC_I2C_STRUCT_H_ */