Peter Drescher / mbed-F401

mbed library with additional peripherals for ST F401 board

Fork of mbed-src by mbed official

This mbed LIB has additional peripherals for ST F401 board

  • UART2 : PA_3 rx, PA_2 tx
  • UART3 : PC_7 rx, PC_6 tx
  • I2C2 : PB_3 SDA, PB_10 SCL
  • I2C3 : PB_4 SDA, PA_8 SCL

targets/hal/TARGET_STM/TARGET_NUCLEO_F103RB/i2c_api.c@70:c1fbde68b492, 2014-01-07 (annotated)

Committer:
mbed_official
Date:
Tue Jan 07 11:00:05 2014 +0000
Revision:
70:c1fbde68b492
Parent:
58:3b55b7a41411
Child:
80:66393a7b209d
Synchronized with git revision 3f438a307904431f2782db3c8fa49946b9fc1d85



Full URL: https://github.com/mbedmicro/mbed/commit/3f438a307904431f2782db3c8fa49946b9fc1d85/



[NUCLEO_F103RB] license text changed + sleep hal updated

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 56:99eb381a3269 1 /* mbed Microcontroller Library
mbed_official 70:c1fbde68b492 2 *******************************************************************************
mbed_official 70:c1fbde68b492 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 70:c1fbde68b492 4 * All rights reserved.
mbed_official 56:99eb381a3269 5 *
mbed_official 70:c1fbde68b492 6 * Redistribution and use in source and binary forms, with or without
mbed_official 70:c1fbde68b492 7 * modification, are permitted provided that the following conditions are met:
mbed_official 56:99eb381a3269 8 *
mbed_official 70:c1fbde68b492 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 70:c1fbde68b492 10 * this list of conditions and the following disclaimer.
mbed_official 70:c1fbde68b492 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 70:c1fbde68b492 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 70:c1fbde68b492 13 * and/or other materials provided with the distribution.
mbed_official 70:c1fbde68b492 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 70:c1fbde68b492 15 * may be used to endorse or promote products derived from this software
mbed_official 70:c1fbde68b492 16 * without specific prior written permission.
mbed_official 56:99eb381a3269 17 *
mbed_official 70:c1fbde68b492 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 70:c1fbde68b492 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 70:c1fbde68b492 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 70:c1fbde68b492 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 70:c1fbde68b492 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 70:c1fbde68b492 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 70:c1fbde68b492 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 70:c1fbde68b492 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 70:c1fbde68b492 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 70:c1fbde68b492 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 70:c1fbde68b492 28 *******************************************************************************
mbed_official 56:99eb381a3269 29 */
mbed_official 56:99eb381a3269 30 #include "i2c_api.h"
mbed_official 56:99eb381a3269 31
mbed_official 56:99eb381a3269 32 #if DEVICE_I2C
mbed_official 56:99eb381a3269 33
mbed_official 56:99eb381a3269 34 #include "cmsis.h"
mbed_official 56:99eb381a3269 35 #include "pinmap.h"
mbed_official 56:99eb381a3269 36 #include "error.h"
mbed_official 56:99eb381a3269 37
mbed_official 56:99eb381a3269 38 /* Timeout values for flags and events waiting loops. These timeouts are
mbed_official 56:99eb381a3269 39 not based on accurate values, they just guarantee that the application will
mbed_official 56:99eb381a3269 40 not remain stuck if the I2C communication is corrupted. */
mbed_official 56:99eb381a3269 41 #define FLAG_TIMEOUT ((int)0x1000)
mbed_official 56:99eb381a3269 42 #define LONG_TIMEOUT ((int)0x8000)
mbed_official 56:99eb381a3269 43
mbed_official 56:99eb381a3269 44 static const PinMap PinMap_I2C_SDA[] = {
mbed_official 58:3b55b7a41411 45 {PB_9, I2C_1, STM_PIN_DATA(GPIO_Mode_AF_OD, 8)}, // GPIO_Remap_I2C1
mbed_official 56:99eb381a3269 46 {NC, NC, 0}
mbed_official 56:99eb381a3269 47 };
mbed_official 56:99eb381a3269 48
mbed_official 56:99eb381a3269 49 static const PinMap PinMap_I2C_SCL[] = {
mbed_official 58:3b55b7a41411 50 {PB_8, I2C_1, STM_PIN_DATA(GPIO_Mode_AF_OD, 8)}, // GPIO_Remap_I2C1
mbed_official 56:99eb381a3269 51 {NC, NC, 0}
mbed_official 56:99eb381a3269 52 };
mbed_official 56:99eb381a3269 53
mbed_official 56:99eb381a3269 54 void i2c_init(i2c_t *obj, PinName sda, PinName scl) {
mbed_official 56:99eb381a3269 55 // Determine the I2C to use
mbed_official 56:99eb381a3269 56 I2CName i2c_sda = (I2CName)pinmap_peripheral(sda, PinMap_I2C_SDA);
mbed_official 56:99eb381a3269 57 I2CName i2c_scl = (I2CName)pinmap_peripheral(scl, PinMap_I2C_SCL);
mbed_official 56:99eb381a3269 58
mbed_official 56:99eb381a3269 59 obj->i2c = (I2CName)pinmap_merge(i2c_sda, i2c_scl);
mbed_official 56:99eb381a3269 60
mbed_official 56:99eb381a3269 61 if (obj->i2c == (I2CName)NC) {
mbed_official 56:99eb381a3269 62 error("I2C pin mapping failed");
mbed_official 56:99eb381a3269 63 }
mbed_official 56:99eb381a3269 64
mbed_official 56:99eb381a3269 65 // Enable I2C clock
mbed_official 56:99eb381a3269 66 if (obj->i2c == I2C_1) {
mbed_official 56:99eb381a3269 67 RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);
mbed_official 56:99eb381a3269 68 }
mbed_official 56:99eb381a3269 69 if (obj->i2c == I2C_2) {
mbed_official 56:99eb381a3269 70 RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C2, ENABLE);
mbed_official 56:99eb381a3269 71 }
mbed_official 56:99eb381a3269 72
mbed_official 56:99eb381a3269 73 // Configure I2C pins
mbed_official 56:99eb381a3269 74 pinmap_pinout(sda, PinMap_I2C_SDA);
mbed_official 56:99eb381a3269 75 pinmap_pinout(scl, PinMap_I2C_SCL);
mbed_official 56:99eb381a3269 76 pin_mode(sda, OpenDrain);
mbed_official 56:99eb381a3269 77 pin_mode(scl, OpenDrain);
mbed_official 56:99eb381a3269 78
mbed_official 56:99eb381a3269 79 // Reset to clear pending flags if any
mbed_official 56:99eb381a3269 80 i2c_reset(obj);
mbed_official 56:99eb381a3269 81
mbed_official 56:99eb381a3269 82 // I2C configuration
mbed_official 56:99eb381a3269 83 i2c_frequency(obj, 100000); // 100 kHz per default
mbed_official 56:99eb381a3269 84 }
mbed_official 56:99eb381a3269 85
mbed_official 56:99eb381a3269 86 void i2c_frequency(i2c_t *obj, int hz) {
mbed_official 56:99eb381a3269 87 I2C_TypeDef *i2c = (I2C_TypeDef *)(obj->i2c);
mbed_official 56:99eb381a3269 88 I2C_InitTypeDef I2C_InitStructure;
mbed_official 56:99eb381a3269 89
mbed_official 56:99eb381a3269 90 if ((hz != 0) && (hz <= 400000)) {
mbed_official 56:99eb381a3269 91 // I2C configuration
mbed_official 56:99eb381a3269 92 I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
mbed_official 56:99eb381a3269 93 I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
mbed_official 56:99eb381a3269 94 I2C_InitStructure.I2C_OwnAddress1 = 0;
mbed_official 56:99eb381a3269 95 I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
mbed_official 56:99eb381a3269 96 I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
mbed_official 56:99eb381a3269 97 I2C_InitStructure.I2C_ClockSpeed = hz;
mbed_official 56:99eb381a3269 98 I2C_Cmd(i2c, ENABLE);
mbed_official 56:99eb381a3269 99 I2C_Init(i2c, &I2C_InitStructure);
mbed_official 56:99eb381a3269 100 }
mbed_official 56:99eb381a3269 101 }
mbed_official 56:99eb381a3269 102
mbed_official 56:99eb381a3269 103 inline int i2c_start(i2c_t *obj) {
mbed_official 56:99eb381a3269 104 I2C_TypeDef *i2c = (I2C_TypeDef *)(obj->i2c);
mbed_official 56:99eb381a3269 105 int timeout;
mbed_official 56:99eb381a3269 106
mbed_official 56:99eb381a3269 107 I2C_ClearFlag(i2c, I2C_FLAG_AF); // Clear Acknowledge failure flag
mbed_official 56:99eb381a3269 108
mbed_official 56:99eb381a3269 109 // Generate the START condition
mbed_official 56:99eb381a3269 110 I2C_GenerateSTART(i2c, ENABLE);
mbed_official 56:99eb381a3269 111
mbed_official 56:99eb381a3269 112 // Wait the START condition has been correctly sent
mbed_official 56:99eb381a3269 113 timeout = FLAG_TIMEOUT;
mbed_official 56:99eb381a3269 114 //while (I2C_CheckEvent(i2c, I2C_EVENT_MASTER_MODE_SELECT) == ERROR) {
mbed_official 56:99eb381a3269 115 while (I2C_GetFlagStatus(i2c, I2C_FLAG_SB) == RESET) {
mbed_official 56:99eb381a3269 116 if ((timeout--) == 0) {
mbed_official 58:3b55b7a41411 117 return 1;
mbed_official 56:99eb381a3269 118 }
mbed_official 56:99eb381a3269 119 }
mbed_official 56:99eb381a3269 120
mbed_official 58:3b55b7a41411 121 return 0;
mbed_official 56:99eb381a3269 122 }
mbed_official 56:99eb381a3269 123
mbed_official 56:99eb381a3269 124 inline int i2c_stop(i2c_t *obj) {
mbed_official 56:99eb381a3269 125 I2C_TypeDef *i2c = (I2C_TypeDef *)(obj->i2c);
mbed_official 58:3b55b7a41411 126
mbed_official 56:99eb381a3269 127 I2C_GenerateSTOP(i2c, ENABLE);
mbed_official 58:3b55b7a41411 128
mbed_official 58:3b55b7a41411 129 return 0;
mbed_official 56:99eb381a3269 130 }
mbed_official 56:99eb381a3269 131
mbed_official 56:99eb381a3269 132 int i2c_read(i2c_t *obj, int address, char *data, int length, int stop) {
mbed_official 56:99eb381a3269 133 I2C_TypeDef *i2c = (I2C_TypeDef *)(obj->i2c);
mbed_official 56:99eb381a3269 134 int timeout;
mbed_official 56:99eb381a3269 135 int count;
mbed_official 56:99eb381a3269 136 int value;
mbed_official 56:99eb381a3269 137
mbed_official 56:99eb381a3269 138 if (length == 0) return 0;
mbed_official 56:99eb381a3269 139
mbed_official 56:99eb381a3269 140 /*
mbed_official 56:99eb381a3269 141 // Wait until the bus is not busy anymore
mbed_official 56:99eb381a3269 142 timeout = LONG_TIMEOUT;
mbed_official 56:99eb381a3269 143 while (I2C_GetFlagStatus(i2c, I2C_FLAG_BUSY) == SET) {
mbed_official 56:99eb381a3269 144 if ((timeout--) == 0) {
mbed_official 58:3b55b7a41411 145 return 0;
mbed_official 56:99eb381a3269 146 }
mbed_official 56:99eb381a3269 147 }
mbed_official 56:99eb381a3269 148 */
mbed_official 56:99eb381a3269 149
mbed_official 56:99eb381a3269 150 i2c_start(obj);
mbed_official 56:99eb381a3269 151
mbed_official 56:99eb381a3269 152 // Send slave address for read
mbed_official 56:99eb381a3269 153 I2C_Send7bitAddress(i2c, address, I2C_Direction_Receiver);
mbed_official 56:99eb381a3269 154
mbed_official 56:99eb381a3269 155 // Wait address is acknowledged
mbed_official 56:99eb381a3269 156 timeout = FLAG_TIMEOUT;
mbed_official 56:99eb381a3269 157 while (I2C_CheckEvent(i2c, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED) == ERROR) {
mbed_official 56:99eb381a3269 158 if ((timeout--) == 0) {
mbed_official 58:3b55b7a41411 159 return 0;
mbed_official 56:99eb381a3269 160 }
mbed_official 56:99eb381a3269 161 }
mbed_official 56:99eb381a3269 162
mbed_official 56:99eb381a3269 163 // Read all bytes except last one
mbed_official 56:99eb381a3269 164 for (count = 0; count < (length - 1); count++) {
mbed_official 56:99eb381a3269 165 value = i2c_byte_read(obj, 0);
mbed_official 56:99eb381a3269 166 data[count] = (char)value;
mbed_official 56:99eb381a3269 167 }
mbed_official 56:99eb381a3269 168
mbed_official 56:99eb381a3269 169 // If not repeated start, send stop.
mbed_official 56:99eb381a3269 170 // Warning: must be done BEFORE the data is read.
mbed_official 56:99eb381a3269 171 if (stop) {
mbed_official 56:99eb381a3269 172 i2c_stop(obj);
mbed_official 56:99eb381a3269 173 }
mbed_official 56:99eb381a3269 174
mbed_official 56:99eb381a3269 175 // Read the last byte
mbed_official 56:99eb381a3269 176 value = i2c_byte_read(obj, 1);
mbed_official 56:99eb381a3269 177 data[count] = (char)value;
mbed_official 56:99eb381a3269 178
mbed_official 56:99eb381a3269 179 return length;
mbed_official 56:99eb381a3269 180 }
mbed_official 56:99eb381a3269 181
mbed_official 56:99eb381a3269 182 int i2c_write(i2c_t *obj, int address, const char *data, int length, int stop) {
mbed_official 56:99eb381a3269 183 I2C_TypeDef *i2c = (I2C_TypeDef *)(obj->i2c);
mbed_official 56:99eb381a3269 184 int timeout;
mbed_official 56:99eb381a3269 185 int count;
mbed_official 56:99eb381a3269 186
mbed_official 56:99eb381a3269 187 /*
mbed_official 56:99eb381a3269 188 // Wait until the bus is not busy anymore
mbed_official 56:99eb381a3269 189 timeout = LONG_TIMEOUT;
mbed_official 56:99eb381a3269 190 while (I2C_GetFlagStatus(i2c, I2C_FLAG_BUSY) == SET) {
mbed_official 56:99eb381a3269 191 if ((timeout--) == 0) {
mbed_official 58:3b55b7a41411 192 return 0;
mbed_official 56:99eb381a3269 193 }
mbed_official 56:99eb381a3269 194 }
mbed_official 56:99eb381a3269 195 */
mbed_official 56:99eb381a3269 196
mbed_official 56:99eb381a3269 197 i2c_start(obj);
mbed_official 56:99eb381a3269 198
mbed_official 56:99eb381a3269 199 // Send slave address for write
mbed_official 56:99eb381a3269 200 I2C_Send7bitAddress(i2c, address, I2C_Direction_Transmitter);
mbed_official 56:99eb381a3269 201
mbed_official 56:99eb381a3269 202 // Wait address is acknowledged
mbed_official 56:99eb381a3269 203 timeout = FLAG_TIMEOUT;
mbed_official 56:99eb381a3269 204 while (I2C_CheckEvent(i2c, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED) == ERROR) {
mbed_official 56:99eb381a3269 205 if ((timeout--) == 0) {
mbed_official 58:3b55b7a41411 206 return 0;
mbed_official 56:99eb381a3269 207 }
mbed_official 56:99eb381a3269 208 }
mbed_official 56:99eb381a3269 209
mbed_official 56:99eb381a3269 210 for (count = 0; count < length; count++) {
mbed_official 58:3b55b7a41411 211 if (i2c_byte_write(obj, data[count]) != 1) {
mbed_official 58:3b55b7a41411 212 i2c_stop(obj);
mbed_official 58:3b55b7a41411 213 return 0;
mbed_official 56:99eb381a3269 214 }
mbed_official 56:99eb381a3269 215 }
mbed_official 56:99eb381a3269 216
mbed_official 56:99eb381a3269 217 // If not repeated start, send stop.
mbed_official 56:99eb381a3269 218 if (stop) {
mbed_official 56:99eb381a3269 219 i2c_stop(obj);
mbed_official 56:99eb381a3269 220 }
mbed_official 56:99eb381a3269 221
mbed_official 56:99eb381a3269 222 return count;
mbed_official 56:99eb381a3269 223 }
mbed_official 56:99eb381a3269 224
mbed_official 56:99eb381a3269 225 int i2c_byte_read(i2c_t *obj, int last) {
mbed_official 56:99eb381a3269 226 I2C_TypeDef *i2c = (I2C_TypeDef *)(obj->i2c);
mbed_official 56:99eb381a3269 227 uint8_t data;
mbed_official 56:99eb381a3269 228 int timeout;
mbed_official 56:99eb381a3269 229
mbed_official 56:99eb381a3269 230 if (last) {
mbed_official 56:99eb381a3269 231 // Don't acknowledge the last byte
mbed_official 56:99eb381a3269 232 I2C_AcknowledgeConfig(i2c, DISABLE);
mbed_official 56:99eb381a3269 233 } else {
mbed_official 56:99eb381a3269 234 // Acknowledge the byte
mbed_official 56:99eb381a3269 235 I2C_AcknowledgeConfig(i2c, ENABLE);
mbed_official 56:99eb381a3269 236 }
mbed_official 56:99eb381a3269 237
mbed_official 56:99eb381a3269 238 // Wait until the byte is received
mbed_official 56:99eb381a3269 239 timeout = FLAG_TIMEOUT;
mbed_official 56:99eb381a3269 240 while (I2C_GetFlagStatus(i2c, I2C_FLAG_RXNE) == RESET) {
mbed_official 56:99eb381a3269 241 if ((timeout--) == 0) {
mbed_official 58:3b55b7a41411 242 return 0;
mbed_official 56:99eb381a3269 243 }
mbed_official 56:99eb381a3269 244 }
mbed_official 56:99eb381a3269 245
mbed_official 56:99eb381a3269 246 data = I2C_ReceiveData(i2c);
mbed_official 56:99eb381a3269 247
mbed_official 56:99eb381a3269 248 return (int)data;
mbed_official 56:99eb381a3269 249 }
mbed_official 56:99eb381a3269 250
mbed_official 56:99eb381a3269 251 int i2c_byte_write(i2c_t *obj, int data) {
mbed_official 56:99eb381a3269 252 I2C_TypeDef *i2c = (I2C_TypeDef *)(obj->i2c);
mbed_official 56:99eb381a3269 253 int timeout;
mbed_official 56:99eb381a3269 254
mbed_official 56:99eb381a3269 255 I2C_SendData(i2c, (uint8_t)data);
mbed_official 56:99eb381a3269 256
mbed_official 56:99eb381a3269 257 // Wait until the byte is transmitted
mbed_official 56:99eb381a3269 258 timeout = FLAG_TIMEOUT;
mbed_official 56:99eb381a3269 259 //while (I2C_CheckEvent(i2c, I2C_EVENT_MASTER_BYTE_TRANSMITTED) == ERROR) {
mbed_official 56:99eb381a3269 260 while ((I2C_GetFlagStatus(i2c, I2C_FLAG_TXE) == RESET) &&
mbed_official 56:99eb381a3269 261 (I2C_GetFlagStatus(i2c, I2C_FLAG_BTF) == RESET)) {
mbed_official 56:99eb381a3269 262 if ((timeout--) == 0) {
mbed_official 58:3b55b7a41411 263 return 0;
mbed_official 56:99eb381a3269 264 }
mbed_official 56:99eb381a3269 265 }
mbed_official 56:99eb381a3269 266
mbed_official 58:3b55b7a41411 267 return 1;
mbed_official 56:99eb381a3269 268 }
mbed_official 56:99eb381a3269 269
mbed_official 56:99eb381a3269 270 void i2c_reset(i2c_t *obj) {
mbed_official 56:99eb381a3269 271 if (obj->i2c == I2C_1) {
mbed_official 56:99eb381a3269 272 RCC_APB1PeriphResetCmd(RCC_APB1Periph_I2C1, ENABLE);
mbed_official 56:99eb381a3269 273 RCC_APB1PeriphResetCmd(RCC_APB1Periph_I2C1, DISABLE);
mbed_official 56:99eb381a3269 274 }
mbed_official 56:99eb381a3269 275 if (obj->i2c == I2C_2) {
mbed_official 56:99eb381a3269 276 RCC_APB1PeriphResetCmd(RCC_APB1Periph_I2C2, ENABLE);
mbed_official 56:99eb381a3269 277 RCC_APB1PeriphResetCmd(RCC_APB1Periph_I2C2, DISABLE);
mbed_official 56:99eb381a3269 278 }
mbed_official 56:99eb381a3269 279 }
mbed_official 56:99eb381a3269 280
mbed_official 56:99eb381a3269 281 #if DEVICE_I2CSLAVE
mbed_official 56:99eb381a3269 282
mbed_official 56:99eb381a3269 283 void i2c_slave_address(i2c_t *obj, int idx, uint32_t address, uint32_t mask) {
mbed_official 56:99eb381a3269 284 I2C_TypeDef *i2c = (I2C_TypeDef *)(obj->i2c);
mbed_official 56:99eb381a3269 285 uint16_t tmpreg;
mbed_official 56:99eb381a3269 286
mbed_official 56:99eb381a3269 287 // Get the old register value
mbed_official 56:99eb381a3269 288 tmpreg = i2c->OAR1;
mbed_official 56:99eb381a3269 289 // Reset address bits
mbed_official 56:99eb381a3269 290 tmpreg &= 0xFC00;
mbed_official 56:99eb381a3269 291 // Set new address
mbed_official 56:99eb381a3269 292 tmpreg |= (uint16_t)((uint16_t)address & (uint16_t)0x00FE); // 7-bits
mbed_official 56:99eb381a3269 293 // Store the new register value
mbed_official 56:99eb381a3269 294 i2c->OAR1 = tmpreg;
mbed_official 56:99eb381a3269 295 }
mbed_official 56:99eb381a3269 296
mbed_official 56:99eb381a3269 297 void i2c_slave_mode(i2c_t *obj, int enable_slave) {
mbed_official 56:99eb381a3269 298 // Nothing to do
mbed_official 56:99eb381a3269 299 }
mbed_official 56:99eb381a3269 300
mbed_official 58:3b55b7a41411 301 // See I2CSlave.h
mbed_official 58:3b55b7a41411 302 #define NoData 0 // the slave has not been addressed
mbed_official 58:3b55b7a41411 303 #define ReadAddressed 1 // the master has requested a read from this slave (slave = transmitter)
mbed_official 58:3b55b7a41411 304 #define WriteGeneral 2 // the master is writing to all slave
mbed_official 58:3b55b7a41411 305 #define WriteAddressed 3 // the master is writing to this slave (slave = receiver)
mbed_official 56:99eb381a3269 306
mbed_official 56:99eb381a3269 307 int i2c_slave_receive(i2c_t *obj) {
mbed_official 58:3b55b7a41411 308 // TO BE DONE
mbed_official 58:3b55b7a41411 309 return(0);
mbed_official 56:99eb381a3269 310 }
mbed_official 56:99eb381a3269 311
mbed_official 56:99eb381a3269 312 int i2c_slave_read(i2c_t *obj, char *data, int length) {
mbed_official 58:3b55b7a41411 313 int count = 0;
mbed_official 58:3b55b7a41411 314
mbed_official 58:3b55b7a41411 315 // Read all bytes
mbed_official 58:3b55b7a41411 316 for (count = 0; count < length; count++) {
mbed_official 58:3b55b7a41411 317 data[count] = i2c_byte_read(obj, 0);
mbed_official 58:3b55b7a41411 318 }
mbed_official 58:3b55b7a41411 319
mbed_official 58:3b55b7a41411 320 return count;
mbed_official 56:99eb381a3269 321 }
mbed_official 56:99eb381a3269 322
mbed_official 56:99eb381a3269 323 int i2c_slave_write(i2c_t *obj, const char *data, int length) {
mbed_official 58:3b55b7a41411 324 int count = 0;
mbed_official 58:3b55b7a41411 325
mbed_official 58:3b55b7a41411 326 // Write all bytes
mbed_official 58:3b55b7a41411 327 for (count = 0; count < length; count++) {
mbed_official 58:3b55b7a41411 328 i2c_byte_write(obj, data[count]);
mbed_official 58:3b55b7a41411 329 }
mbed_official 58:3b55b7a41411 330
mbed_official 58:3b55b7a41411 331 return count;
mbed_official 56:99eb381a3269 332 }
mbed_official 56:99eb381a3269 333
mbed_official 56:99eb381a3269 334
mbed_official 56:99eb381a3269 335 #endif // DEVICE_I2CSLAVE
mbed_official 56:99eb381a3269 336
mbed_official 56:99eb381a3269 337 #endif // DEVICE_I2C