RTEMS: bsps/arm/lpc32xx/include/bsp/i2c.h Source File

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i2c.h
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1
9/*
10 * Copyright (c) 2010
11 * embedded brains GmbH
12 * Obere Lagerstr. 30
13 * D-82178 Puchheim
14 * Germany
15 * <rtems@embedded-brains.de>
16 *
17 * The license and distribution terms for this file may be
18 * found in the file LICENSE in this distribution or at
19 * http://www.rtems.org/license/LICENSE.
20 */
21
22#ifndef LIBBSP_ARM_LPC32XX_I2C_H
23#define LIBBSP_ARM_LPC32XX_I2C_H
24
25#include <rtems.h>
26
27#include <bsp/lpc32xx.h>
28
29#ifdef __cplusplus
30extern "C" {
31#endif /* __cplusplus */
32
52#define I2CCLK_1_EN BSP_BIT32(0)
53#define I2CCLK_2_EN BSP_BIT32(1)
54#define I2CCLK_1_HIGH_DRIVE BSP_BIT32(2)
55#define I2CCLK_2_HIGH_DRIVE BSP_BIT32(3)
56#define I2CCLK_USB_HIGH_DRIVE BSP_BIT32(4)
57
66#define I2C_TX_READ BSP_BIT32(0)
67#define I2C_TX_ADDR(val) BSP_FLD32(val, 1, 7)
68#define I2C_TX_START BSP_BIT32(8)
69#define I2C_TX_STOP BSP_BIT32(9)
70
79#define I2C_STAT_TDI BSP_BIT32(0)
80#define I2C_STAT_AFI BSP_BIT32(1)
81#define I2C_STAT_NAI BSP_BIT32(2)
82#define I2C_STAT_DRMI BSP_BIT32(3)
83#define I2C_STAT_DRSI BSP_BIT32(4)
84#define I2C_STAT_ACTIVE BSP_BIT32(5)
85#define I2C_STAT_SCL BSP_BIT32(6)
86#define I2C_STAT_SDA BSP_BIT32(7)
87#define I2C_STAT_RFF BSP_BIT32(8)
88#define I2C_STAT_RFE BSP_BIT32(9)
89#define I2C_STAT_TFF BSP_BIT32(10)
90#define I2C_STAT_TFE BSP_BIT32(11)
91#define I2C_STAT_TFFS BSP_BIT32(12)
92#define I2C_STAT_TFES BSP_BIT32(13)
93
102#define I2C_CTRL_TDIE BSP_BIT32(0)
103#define I2C_CTRL_AFIE BSP_BIT32(1)
104#define I2C_CTRL_NAIE BSP_BIT32(2)
105#define I2C_CTRL_DRMIE BSP_BIT32(3)
106#define I2C_CTRL_DRSIE BSP_BIT32(4)
107#define I2C_CTRL_RFFIE BSP_BIT32(5)
108#define I2C_CTRL_RFDAIE BSP_BIT32(6)
109#define I2C_CTRL_TFFIO BSP_BIT32(7)
110#define I2C_CTRL_RESET BSP_BIT32(8)
111#define I2C_CTRL_SEVEN BSP_BIT32(9)
112#define I2C_CTRL_TFFSIE BSP_BIT32(10)
113
125 rtems_status_code lpc32xx_i2c_init(
126 volatile lpc32xx_i2c *i2c,
127 unsigned clock_in_hz
128);
129
133void lpc32xx_i2c_reset(volatile lpc32xx_i2c *i2c);
134
143 rtems_status_code lpc32xx_i2c_clock(
144 volatile lpc32xx_i2c *i2c,
145 unsigned clock_in_hz
146);
147
159 rtems_status_code lpc32xx_i2c_write_start(
160 volatile lpc32xx_i2c *i2c,
161 unsigned addr
162);
163
173 rtems_status_code lpc32xx_i2c_write_with_optional_stop(
174 volatile lpc32xx_i2c *i2c,
175 const uint8_t *out,
176 size_t n,
177 bool stop
178);
179
191 rtems_status_code lpc32xx_i2c_read_start(
192 volatile lpc32xx_i2c *i2c,
193 unsigned addr
194);
195
203 rtems_status_code lpc32xx_i2c_read_with_optional_stop(
204 volatile lpc32xx_i2c *i2c,
205 uint8_t *in,
206 size_t n,
207 bool stop
208);
209
218 rtems_status_code lpc32xx_i2c_write_and_read(
219 volatile lpc32xx_i2c *i2c,
220 unsigned addr,
221 const uint8_t *out,
222 size_t out_size,
223 uint8_t *in,
224 size_t in_size
225);
226
235static inline rtems_status_code lpc32xx_i2c_write(
236 volatile lpc32xx_i2c *i2c,
237 unsigned addr,
238 const uint8_t *out,
239 size_t out_size
240)
241{
242 return lpc32xx_i2c_write_and_read(i2c, addr, out, out_size, NULL, 0);
243}
244
253static inline rtems_status_code lpc32xx_i2c_read(
254 volatile lpc32xx_i2c *i2c,
255 unsigned addr,
256 uint8_t *in,
257 size_t in_size
258)
259{
260 return lpc32xx_i2c_write_and_read(i2c, addr, NULL, 0, in, in_size);
261}
262
265#ifdef __cplusplus
266}
267#endif /* __cplusplus */
268
269#endif /* LIBBSP_ARM_LPC32XX_I2C_H */
NULL
#define NULL
Requests a GPIO pin group configuration.
Definition: bestcomm_api.h:77
rtems_status_code
rtems_status_code
Classic API Status.
Definition: status.h:43
lpc32xx_i2c_init
rtems_status_code lpc32xx_i2c_init(volatile lpc32xx_i2c *i2c, unsigned clock_in_hz)
Initializes the I2C module i2c.
Definition: i2c.c:33
lpc32xx_i2c_read_start
rtems_status_code lpc32xx_i2c_read_start(volatile lpc32xx_i2c *i2c, unsigned addr)
Starts a read transaction on the I2C module i2c.
Definition: i2c.c:129
lpc32xx_i2c_read_with_optional_stop
rtems_status_code lpc32xx_i2c_read_with_optional_stop(volatile lpc32xx_i2c *i2c, uint8_t *in, size_t n, bool stop)
Reads data via the I2C module i2c with optional stop.
Definition: i2c.c:174
lpc32xx_i2c_write_start
rtems_status_code lpc32xx_i2c_write_start(volatile lpc32xx_i2c *i2c, unsigned addr)
Starts a write transaction on the I2C module i2c.
Definition: i2c.c:121
lpc32xx_i2c_reset
void lpc32xx_i2c_reset(volatile lpc32xx_i2c *i2c)
Resets the I2C module i2c.
Definition: i2c.c:28
lpc32xx_i2c_write_with_optional_stop
rtems_status_code lpc32xx_i2c_write_with_optional_stop(volatile lpc32xx_i2c *i2c, const uint8_t *out, size_t n, bool stop)
Writes data via the I2C module i2c with optional stop.
Definition: i2c.c:137
lpc32xx_i2c_clock
rtems_status_code lpc32xx_i2c_clock(volatile lpc32xx_i2c *i2c, unsigned clock_in_hz)
Sets the I2C module i2c clock.
Definition: i2c.c:55
lpc32xx_i2c_write_and_read
rtems_status_code lpc32xx_i2c_write_and_read(volatile lpc32xx_i2c *i2c, unsigned addr, const uint8_t *out, size_t out_size, uint8_t *in, size_t in_size)
Writes and reads data via the I2C module i2c.
Definition: i2c.c:216
lpc32xx.h
Register base addresses.
rtems.h
i2c
Definition: 8xx_immap.h:216
lpc32xx_i2c
Definition: lpc32xx.h:475