NEORV32 Software Framework Documentation
The NEORV32 RISC-V Processor
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neorv32_twi.h
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1// ================================================================================ //
2// The NEORV32 RISC-V Processor - https://github.com/stnolting/neorv32 //
3// Copyright (c) NEORV32 contributors. //
4// Copyright (c) 2020 - 2025 Stephan Nolting. All rights reserved. //
5// Licensed under the BSD-3-Clause license, see LICENSE for details. //
6// SPDX-License-Identifier: BSD-3-Clause //
7// ================================================================================ //
8
14#ifndef NEORV32_TWI_H
15#define NEORV32_TWI_H
16
17#include <stdint.h>
18
19
20/**********************************************************************/
25typedef volatile struct __attribute__((packed,aligned(4))) {
26 uint32_t CTRL;
27 uint32_t DCMD;
29
31#define NEORV32_TWI ((neorv32_twi_t*) (NEORV32_TWI_BASE))
32
54
66/**********************************************************************/
79/**********************************************************************/
83int neorv32_twi_available(void);
84void neorv32_twi_setup(int prsc, int cdiv, int clkstr);
86void neorv32_twi_disable(void);
87void neorv32_twi_enable(void);
88
89int neorv32_twi_sense_scl(void);
90int neorv32_twi_sense_sda(void);
91
92int neorv32_twi_busy(void);
93int neorv32_twi_get(uint8_t *data);
94
95int neorv32_twi_transfer(uint8_t *data, int mack);
98
99void neorv32_twi_send_nonblocking(uint8_t data, int mack);
105#endif // NEORV32_TWI_H
void neorv32_twi_enable(void)
Definition neorv32_twi.c:72
void neorv32_twi_send_nonblocking(uint8_t data, int mack)
Definition neorv32_twi.c:196
int neorv32_twi_get_fifo_depth(void)
Definition neorv32_twi.c:53
NEORV32_TWI_DCMD_enum
Definition neorv32_twi.h:56
@ TWI_DCMD_CMD_LO
Definition neorv32_twi.h:60
@ TWI_DCMD_MSB
Definition neorv32_twi.h:58
@ TWI_DCMD_CMD_HI
Definition neorv32_twi.h:61
@ TWI_DCMD_LSB
Definition neorv32_twi.h:57
@ TWI_DCMD_ACK
Definition neorv32_twi.h:59
int neorv32_twi_busy(void)
Definition neorv32_twi.c:115
void neorv32_twi_generate_start(void)
Definition neorv32_twi.c:180
int neorv32_twi_sense_scl(void)
Definition neorv32_twi.c:83
NEORV32_TWI_CTRL_enum
Definition neorv32_twi.h:34
@ TWI_CTRL_FIFO_MSB
Definition neorv32_twi.h:46
@ TWI_CTRL_EN
Definition neorv32_twi.h:35
@ TWI_CTRL_BUSY
Definition neorv32_twi.h:52
@ TWI_CTRL_CDIV1
Definition neorv32_twi.h:40
@ TWI_CTRL_PRSC2
Definition neorv32_twi.h:38
@ TWI_CTRL_SENSE_SCL
Definition neorv32_twi.h:48
@ TWI_CTRL_FIFO_LSB
Definition neorv32_twi.h:45
@ TWI_CTRL_CDIV0
Definition neorv32_twi.h:39
@ TWI_CTRL_PRSC1
Definition neorv32_twi.h:37
@ TWI_CTRL_PRSC0
Definition neorv32_twi.h:36
@ TWI_CTRL_CDIV3
Definition neorv32_twi.h:42
@ TWI_CTRL_TX_FULL
Definition neorv32_twi.h:50
@ TWI_CTRL_CDIV2
Definition neorv32_twi.h:41
@ TWI_CTRL_CLKSTR
Definition neorv32_twi.h:43
@ TWI_CTRL_RX_AVAIL
Definition neorv32_twi.h:51
@ TWI_CTRL_SENSE_SDA
Definition neorv32_twi.h:49
int neorv32_twi_sense_sda(void)
Definition neorv32_twi.c:99
int neorv32_twi_get(uint8_t *data)
Definition neorv32_twi.c:132
void neorv32_twi_setup(int prsc, int cdiv, int clkstr)
Definition neorv32_twi.c:35
NEORV32_TWI_DCMD_CMD_enum
Definition neorv32_twi.h:70
@ TWI_CMD_RTX
Definition neorv32_twi.h:74
@ TWI_CMD_STOP
Definition neorv32_twi.h:73
@ TWI_CMD_START
Definition neorv32_twi.h:72
@ TWI_CMD_NOP
Definition neorv32_twi.h:71
void neorv32_twi_generate_stop_nonblocking(void)
Definition neorv32_twi.c:210
int neorv32_twi_available(void)
Definition neorv32_twi.c:22
int neorv32_twi_transfer(uint8_t *data, int mack)
Definition neorv32_twi.c:153
void neorv32_twi_generate_stop(void)
Definition neorv32_twi.c:167
void neorv32_twi_generate_start_nonblocking(void)
Definition neorv32_twi.c:221
void neorv32_twi_disable(void)
Definition neorv32_twi.c:63
Definition neorv32_twi.h:25
uint32_t CTRL
Definition neorv32_twi.h:26
uint32_t DCMD
Definition neorv32_twi.h:27