Fawwaz Nadzmy / mbed-src

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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