mbed official / mbed-src

mbed library sources

Dependents:   Encrypted my_mbed lklk CyaSSL_DTLS_Cellular ... more

Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

Import librarymbed

The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

targets/hal/TARGET_WIZNET/TARGET_W7500x/i2c_api.c@601:248b0d2dd755, 2015-07-31 (annotated)

Committer:
mbed_official
Date:
Fri Jul 31 15:00:09 2015 +0100
Revision:
601:248b0d2dd755
Parent:
576:99a3d3d9c43f
Child:
619:034e698bc035
Synchronized with git revision 9d276ebad7fd567e170326b8ba3f5ecbf2b021a3



Full URL: https://github.com/mbedmicro/mbed/commit/9d276ebad7fd567e170326b8ba3f5ecbf2b021a3/



Wiznet - I2c -> gpio

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 558:0880f51c4036 1 /* mbed Microcontroller Library
mbed_official 558:0880f51c4036 2 *******************************************************************************
mbed_official 558:0880f51c4036 3 * Copyright (c) 2015 WIZnet Co.,Ltd. All rights reserved.
mbed_official 558:0880f51c4036 4 * All rights reserved.
mbed_official 558:0880f51c4036 5 *
mbed_official 558:0880f51c4036 6 * Redistribution and use in source and binary forms, with or without
mbed_official 558:0880f51c4036 7 * modification, are permitted provided that the following conditions are met:
mbed_official 558:0880f51c4036 8 *
mbed_official 558:0880f51c4036 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 558:0880f51c4036 10 * this list of conditions and the following disclaimer.
mbed_official 558:0880f51c4036 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 558:0880f51c4036 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 558:0880f51c4036 13 * and/or other materials provided with the distribution.
mbed_official 558:0880f51c4036 14 * 3. Neither the name of ARM Limited nor the names of its contributors
mbed_official 558:0880f51c4036 15 * may be used to endorse or promote products derived from this software
mbed_official 558:0880f51c4036 16 * without specific prior written permission.
mbed_official 558:0880f51c4036 17 *
mbed_official 558:0880f51c4036 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 558:0880f51c4036 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 558:0880f51c4036 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 558:0880f51c4036 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 558:0880f51c4036 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 558:0880f51c4036 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 558:0880f51c4036 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 558:0880f51c4036 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 558:0880f51c4036 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 558:0880f51c4036 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 558:0880f51c4036 28 *******************************************************************************
mbed_official 558:0880f51c4036 29 */
mbed_official 558:0880f51c4036 30
mbed_official 558:0880f51c4036 31 #include "mbed_assert.h"
mbed_official 558:0880f51c4036 32 #include "i2c_api.h"
mbed_official 558:0880f51c4036 33
mbed_official 576:99a3d3d9c43f 34
mbed_official 558:0880f51c4036 35 #if DEVICE_I2C
mbed_official 558:0880f51c4036 36
mbed_official 558:0880f51c4036 37 #include "cmsis.h"
mbed_official 558:0880f51c4036 38 #include "pinmap.h"
mbed_official 558:0880f51c4036 39 #include "PeripheralPins.h"
mbed_official 558:0880f51c4036 40
mbed_official 576:99a3d3d9c43f 41 #include "wait_api.h"
mbed_official 576:99a3d3d9c43f 42 #include "us_ticker_api.h"
mbed_official 576:99a3d3d9c43f 43
mbed_official 558:0880f51c4036 44 /* Timeout values for flags and events waiting loops. These timeouts are
mbed_official 558:0880f51c4036 45 not based on accurate values, they just guarantee that the application will
mbed_official 558:0880f51c4036 46 not remain stuck if the I2C communication is corrupted. */
mbed_official 558:0880f51c4036 47 #define FLAG_TIMEOUT ((int)0x1000)
mbed_official 558:0880f51c4036 48 #define LONG_TIMEOUT ((int)0xFFFF)
mbed_official 558:0880f51c4036 49
mbed_official 558:0880f51c4036 50
mbed_official 558:0880f51c4036 51 void i2c_init(i2c_t *obj, PinName sda, PinName scl)
mbed_official 558:0880f51c4036 52 {
mbed_official 601:248b0d2dd755 53 I2C_ConfigStruct conf;
mbed_official 601:248b0d2dd755 54
mbed_official 601:248b0d2dd755 55 //Determine the I2C to use
mbed_official 558:0880f51c4036 56 I2CName i2c_sda = (I2CName)pinmap_peripheral(sda, PinMap_I2C_SDA);
mbed_official 558:0880f51c4036 57 I2CName i2c_scl = (I2CName)pinmap_peripheral(scl, PinMap_I2C_SCL);
mbed_official 601:248b0d2dd755 58 obj->I2Cx = (I2CName)pinmap_merge(i2c_sda, i2c_scl);
mbed_official 601:248b0d2dd755 59 MBED_ASSERT(obj->I2Cx != (I2CName)NC);
mbed_official 601:248b0d2dd755 60
mbed_official 601:248b0d2dd755 61 obj->sda = sda;
mbed_official 601:248b0d2dd755 62 obj->scl = scl;
mbed_official 601:248b0d2dd755 63 obj->ADDRESS = 0x0;
mbed_official 558:0880f51c4036 64 obj->is_setAddress = 0;
mbed_official 601:248b0d2dd755 65
mbed_official 601:248b0d2dd755 66 conf.sda = (I2C_PinName)obj->sda;
mbed_official 601:248b0d2dd755 67 conf.scl = (I2C_PinName)obj->scl;
mbed_official 601:248b0d2dd755 68
mbed_official 601:248b0d2dd755 69 I2C_Init(&conf);
mbed_official 558:0880f51c4036 70 }
mbed_official 558:0880f51c4036 71
mbed_official 558:0880f51c4036 72 void i2c_frequency(i2c_t *obj, int hz)
mbed_official 558:0880f51c4036 73 {
mbed_official 601:248b0d2dd755 74
mbed_official 558:0880f51c4036 75 }
mbed_official 558:0880f51c4036 76
mbed_official 558:0880f51c4036 77 inline int i2c_start(i2c_t *obj)
mbed_official 558:0880f51c4036 78 {
mbed_official 601:248b0d2dd755 79 I2C_ConfigStruct conf;
mbed_official 601:248b0d2dd755 80 conf.sda = (I2C_PinName)obj->sda;
mbed_official 601:248b0d2dd755 81 conf.scl = (I2C_PinName)obj->scl;
mbed_official 601:248b0d2dd755 82
mbed_official 601:248b0d2dd755 83 I2C_Start(&conf);
mbed_official 601:248b0d2dd755 84
mbed_official 558:0880f51c4036 85 return 0;
mbed_official 558:0880f51c4036 86 }
mbed_official 558:0880f51c4036 87
mbed_official 558:0880f51c4036 88 inline int i2c_stop(i2c_t *obj)
mbed_official 601:248b0d2dd755 89 {
mbed_official 601:248b0d2dd755 90 I2C_ConfigStruct conf;
mbed_official 601:248b0d2dd755 91 conf.sda = (I2C_PinName)obj->sda;
mbed_official 601:248b0d2dd755 92 conf.scl = (I2C_PinName)obj->scl;
mbed_official 576:99a3d3d9c43f 93
mbed_official 601:248b0d2dd755 94 I2C_Stop(&conf);
mbed_official 576:99a3d3d9c43f 95
mbed_official 558:0880f51c4036 96 return 0;
mbed_official 558:0880f51c4036 97 }
mbed_official 558:0880f51c4036 98
mbed_official 558:0880f51c4036 99 int i2c_read(i2c_t *obj, int address, char *data, int length, int stop)
mbed_official 558:0880f51c4036 100 {
mbed_official 601:248b0d2dd755 101 I2C_ConfigStruct conf;
mbed_official 601:248b0d2dd755 102
mbed_official 601:248b0d2dd755 103 conf.sda = (I2C_PinName)obj->sda;
mbed_official 601:248b0d2dd755 104 conf.scl = (I2C_PinName)obj->scl;
mbed_official 576:99a3d3d9c43f 105
mbed_official 601:248b0d2dd755 106
mbed_official 601:248b0d2dd755 107 if(stop)
mbed_official 601:248b0d2dd755 108 {
mbed_official 601:248b0d2dd755 109 if(I2C_Read(&conf, address, data, length) != 0)
mbed_official 601:248b0d2dd755 110 return -1;
mbed_official 558:0880f51c4036 111 }
mbed_official 558:0880f51c4036 112 else
mbed_official 558:0880f51c4036 113 {
mbed_official 601:248b0d2dd755 114 if(I2C_ReadRepeated(&conf, address, data, length) != 0)
mbed_official 601:248b0d2dd755 115 return -1;
mbed_official 558:0880f51c4036 116 }
mbed_official 576:99a3d3d9c43f 117
mbed_official 601:248b0d2dd755 118 return length;
mbed_official 576:99a3d3d9c43f 119
mbed_official 558:0880f51c4036 120 }
mbed_official 558:0880f51c4036 121
mbed_official 558:0880f51c4036 122 int i2c_write(i2c_t *obj, int address, const char *data, int length, int stop)
mbed_official 558:0880f51c4036 123 {
mbed_official 601:248b0d2dd755 124 I2C_ConfigStruct conf;
mbed_official 601:248b0d2dd755 125
mbed_official 601:248b0d2dd755 126 conf.sda = (I2C_PinName)obj->sda;
mbed_official 601:248b0d2dd755 127 conf.scl = (I2C_PinName)obj->scl;
mbed_official 601:248b0d2dd755 128
mbed_official 576:99a3d3d9c43f 129
mbed_official 601:248b0d2dd755 130 if(stop)
mbed_official 601:248b0d2dd755 131 {
mbed_official 601:248b0d2dd755 132 if(I2C_Write(&conf, address, data, length) != 0)
mbed_official 601:248b0d2dd755 133 return -1;
mbed_official 601:248b0d2dd755 134 }
mbed_official 558:0880f51c4036 135 else
mbed_official 558:0880f51c4036 136 {
mbed_official 601:248b0d2dd755 137 if(I2C_WriteRepeated(&conf, address, data, length) != 0)
mbed_official 601:248b0d2dd755 138 return -1;
mbed_official 558:0880f51c4036 139 }
mbed_official 576:99a3d3d9c43f 140
mbed_official 601:248b0d2dd755 141 return length;
mbed_official 558:0880f51c4036 142 }
mbed_official 558:0880f51c4036 143
mbed_official 558:0880f51c4036 144 int i2c_byte_read(i2c_t *obj, int last)
mbed_official 558:0880f51c4036 145 {
mbed_official 601:248b0d2dd755 146 uint8_t ret;
mbed_official 601:248b0d2dd755 147 I2C_ConfigStruct conf;
mbed_official 601:248b0d2dd755 148
mbed_official 601:248b0d2dd755 149 conf.sda = (I2C_PinName)obj->sda;
mbed_official 601:248b0d2dd755 150 conf.scl = (I2C_PinName)obj->scl;
mbed_official 601:248b0d2dd755 151
mbed_official 601:248b0d2dd755 152 ret = I2C_ReadByte(&conf);
mbed_official 601:248b0d2dd755 153
mbed_official 601:248b0d2dd755 154 if(last)
mbed_official 601:248b0d2dd755 155 I2C_SendNACK(&conf);
mbed_official 601:248b0d2dd755 156 else
mbed_official 601:248b0d2dd755 157 I2C_SendACK(&conf);
mbed_official 601:248b0d2dd755 158
mbed_official 601:248b0d2dd755 159 return (int)ret;
mbed_official 558:0880f51c4036 160 }
mbed_official 558:0880f51c4036 161
mbed_official 558:0880f51c4036 162 int i2c_byte_write(i2c_t *obj, int data)
mbed_official 558:0880f51c4036 163 {
mbed_official 601:248b0d2dd755 164 I2C_ConfigStruct conf;
mbed_official 601:248b0d2dd755 165
mbed_official 601:248b0d2dd755 166 conf.sda = (I2C_PinName)obj->sda;
mbed_official 601:248b0d2dd755 167 conf.scl = (I2C_PinName)obj->scl;
mbed_official 601:248b0d2dd755 168
mbed_official 601:248b0d2dd755 169 if(I2C_WriteByte(&conf, (uint8_t)data)) // NACK
mbed_official 601:248b0d2dd755 170 return 0;
mbed_official 601:248b0d2dd755 171 else //ack
mbed_official 601:248b0d2dd755 172 return 1;
mbed_official 558:0880f51c4036 173 }
mbed_official 558:0880f51c4036 174
mbed_official 558:0880f51c4036 175 void i2c_reset(i2c_t *obj)
mbed_official 558:0880f51c4036 176 {
mbed_official 601:248b0d2dd755 177
mbed_official 558:0880f51c4036 178 }
mbed_official 558:0880f51c4036 179
mbed_official 558:0880f51c4036 180
mbed_official 558:0880f51c4036 181 #endif // DEVICE_I2C