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_L152RE/i2c_api.c@76:aeb1df146756, 2014-01-27 (annotated)

Committer:
mbed_official
Date:
Mon Jan 27 14:30:07 2014 +0000
Revision:
76:aeb1df146756
Child:
80:66393a7b209d
Synchronized with git revision a31ec9c5f7bcb5c8a1b2eced103f6a1dfa921abd



Full URL: https://github.com/mbedmicro/mbed/commit/a31ec9c5f7bcb5c8a1b2eced103f6a1dfa921abd/



Add NUCLEO_L152RE

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 76:aeb1df146756 1 /* mbed Microcontroller Library
mbed_official 76:aeb1df146756 2 *******************************************************************************
mbed_official 76:aeb1df146756 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 76:aeb1df146756 4 * All rights reserved.
mbed_official 76:aeb1df146756 5 *
mbed_official 76:aeb1df146756 6 * Redistribution and use in source and binary forms, with or without
mbed_official 76:aeb1df146756 7 * modification, are permitted provided that the following conditions are met:
mbed_official 76:aeb1df146756 8 *
mbed_official 76:aeb1df146756 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 76:aeb1df146756 10 * this list of conditions and the following disclaimer.
mbed_official 76:aeb1df146756 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 76:aeb1df146756 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 76:aeb1df146756 13 * and/or other materials provided with the distribution.
mbed_official 76:aeb1df146756 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 76:aeb1df146756 15 * may be used to endorse or promote products derived from this software
mbed_official 76:aeb1df146756 16 * without specific prior written permission.
mbed_official 76:aeb1df146756 17 *
mbed_official 76:aeb1df146756 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 76:aeb1df146756 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 76:aeb1df146756 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 76:aeb1df146756 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 76:aeb1df146756 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 76:aeb1df146756 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 76:aeb1df146756 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 76:aeb1df146756 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 76:aeb1df146756 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 76:aeb1df146756 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 76:aeb1df146756 28 *******************************************************************************
mbed_official 76:aeb1df146756 29 */
mbed_official 76:aeb1df146756 30 #include "i2c_api.h"
mbed_official 76:aeb1df146756 31
mbed_official 76:aeb1df146756 32 #if DEVICE_I2C
mbed_official 76:aeb1df146756 33
mbed_official 76:aeb1df146756 34 #include "cmsis.h"
mbed_official 76:aeb1df146756 35 #include "pinmap.h"
mbed_official 76:aeb1df146756 36 #include "error.h"
mbed_official 76:aeb1df146756 37
mbed_official 76:aeb1df146756 38 /* Timeout values for flags and events waiting loops. These timeouts are
mbed_official 76:aeb1df146756 39 not based on accurate values, they just guarantee that the application will
mbed_official 76:aeb1df146756 40 not remain stuck if the I2C communication is corrupted. */
mbed_official 76:aeb1df146756 41 #define FLAG_TIMEOUT ((int)0x1000)
mbed_official 76:aeb1df146756 42 #define LONG_TIMEOUT ((int)0x8000)
mbed_official 76:aeb1df146756 43
mbed_official 76:aeb1df146756 44 static const PinMap PinMap_I2C_SDA[] = {
mbed_official 76:aeb1df146756 45 {PB_9, I2C_1, STM_PIN_DATA(GPIO_Mode_AF_OD, 8)}, // GPIO_Remap_I2C1
mbed_official 76:aeb1df146756 46 {NC, NC, 0}
mbed_official 76:aeb1df146756 47 };
mbed_official 76:aeb1df146756 48
mbed_official 76:aeb1df146756 49 static const PinMap PinMap_I2C_SCL[] = {
mbed_official 76:aeb1df146756 50 {PB_8, I2C_1, STM_PIN_DATA(GPIO_Mode_AF_OD, 8)}, // GPIO_Remap_I2C1
mbed_official 76:aeb1df146756 51 {NC, NC, 0}
mbed_official 76:aeb1df146756 52 };
mbed_official 76:aeb1df146756 53
mbed_official 76:aeb1df146756 54 void i2c_init(i2c_t *obj, PinName sda, PinName scl) {
mbed_official 76:aeb1df146756 55 // Determine the I2C to use
mbed_official 76:aeb1df146756 56 I2CName i2c_sda = (I2CName)pinmap_peripheral(sda, PinMap_I2C_SDA);
mbed_official 76:aeb1df146756 57 I2CName i2c_scl = (I2CName)pinmap_peripheral(scl, PinMap_I2C_SCL);
mbed_official 76:aeb1df146756 58
mbed_official 76:aeb1df146756 59 obj->i2c = (I2CName)pinmap_merge(i2c_sda, i2c_scl);
mbed_official 76:aeb1df146756 60
mbed_official 76:aeb1df146756 61 if (obj->i2c == (I2CName)NC) {
mbed_official 76:aeb1df146756 62 error("I2C pin mapping failed");
mbed_official 76:aeb1df146756 63 }
mbed_official 76:aeb1df146756 64
mbed_official 76:aeb1df146756 65 // Enable I2C clock
mbed_official 76:aeb1df146756 66 if (obj->i2c == I2C_1) {
mbed_official 76:aeb1df146756 67 RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);
mbed_official 76:aeb1df146756 68 }
mbed_official 76:aeb1df146756 69 if (obj->i2c == I2C_2) {
mbed_official 76:aeb1df146756 70 RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C2, ENABLE);
mbed_official 76:aeb1df146756 71 }
mbed_official 76:aeb1df146756 72
mbed_official 76:aeb1df146756 73 // Configure I2C pins
mbed_official 76:aeb1df146756 74 pinmap_pinout(sda, PinMap_I2C_SDA);
mbed_official 76:aeb1df146756 75 pinmap_pinout(scl, PinMap_I2C_SCL);
mbed_official 76:aeb1df146756 76 pin_mode(sda, OpenDrain);
mbed_official 76:aeb1df146756 77 pin_mode(scl, OpenDrain);
mbed_official 76:aeb1df146756 78
mbed_official 76:aeb1df146756 79 // Reset to clear pending flags if any
mbed_official 76:aeb1df146756 80 i2c_reset(obj);
mbed_official 76:aeb1df146756 81
mbed_official 76:aeb1df146756 82 // I2C configuration
mbed_official 76:aeb1df146756 83 i2c_frequency(obj, 100000); // 100 kHz per default
mbed_official 76:aeb1df146756 84 }
mbed_official 76:aeb1df146756 85
mbed_official 76:aeb1df146756 86 void i2c_frequency(i2c_t *obj, int hz) {
mbed_official 76:aeb1df146756 87 I2C_TypeDef *i2c = (I2C_TypeDef *)(obj->i2c);
mbed_official 76:aeb1df146756 88 I2C_InitTypeDef I2C_InitStructure;
mbed_official 76:aeb1df146756 89
mbed_official 76:aeb1df146756 90 if ((hz != 0) && (hz <= 400000)) {
mbed_official 76:aeb1df146756 91 // I2C configuration
mbed_official 76:aeb1df146756 92 I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
mbed_official 76:aeb1df146756 93 I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
mbed_official 76:aeb1df146756 94 I2C_InitStructure.I2C_OwnAddress1 = 0;
mbed_official 76:aeb1df146756 95 I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
mbed_official 76:aeb1df146756 96 I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
mbed_official 76:aeb1df146756 97 I2C_InitStructure.I2C_ClockSpeed = hz;
mbed_official 76:aeb1df146756 98 I2C_Cmd(i2c, ENABLE);
mbed_official 76:aeb1df146756 99 I2C_Init(i2c, &I2C_InitStructure);
mbed_official 76:aeb1df146756 100 }
mbed_official 76:aeb1df146756 101 }
mbed_official 76:aeb1df146756 102
mbed_official 76:aeb1df146756 103 inline int i2c_start(i2c_t *obj) {
mbed_official 76:aeb1df146756 104 I2C_TypeDef *i2c = (I2C_TypeDef *)(obj->i2c);
mbed_official 76:aeb1df146756 105 int timeout;
mbed_official 76:aeb1df146756 106
mbed_official 76:aeb1df146756 107 I2C_ClearFlag(i2c, I2C_FLAG_AF); // Clear Acknowledge failure flag
mbed_official 76:aeb1df146756 108
mbed_official 76:aeb1df146756 109 // Generate the START condition
mbed_official 76:aeb1df146756 110 I2C_GenerateSTART(i2c, ENABLE);
mbed_official 76:aeb1df146756 111
mbed_official 76:aeb1df146756 112 // Wait the START condition has been correctly sent
mbed_official 76:aeb1df146756 113 timeout = FLAG_TIMEOUT;
mbed_official 76:aeb1df146756 114 //while (I2C_CheckEvent(i2c, I2C_EVENT_MASTER_MODE_SELECT) == ERROR) {
mbed_official 76:aeb1df146756 115 while (I2C_GetFlagStatus(i2c, I2C_FLAG_SB) == RESET) {
mbed_official 76:aeb1df146756 116 if ((timeout--) == 0) {
mbed_official 76:aeb1df146756 117 return 1;
mbed_official 76:aeb1df146756 118 }
mbed_official 76:aeb1df146756 119 }
mbed_official 76:aeb1df146756 120
mbed_official 76:aeb1df146756 121 return 0;
mbed_official 76:aeb1df146756 122 }
mbed_official 76:aeb1df146756 123
mbed_official 76:aeb1df146756 124 inline int i2c_stop(i2c_t *obj) {
mbed_official 76:aeb1df146756 125 I2C_TypeDef *i2c = (I2C_TypeDef *)(obj->i2c);
mbed_official 76:aeb1df146756 126
mbed_official 76:aeb1df146756 127 I2C_GenerateSTOP(i2c, ENABLE);
mbed_official 76:aeb1df146756 128
mbed_official 76:aeb1df146756 129 return 0;
mbed_official 76:aeb1df146756 130 }
mbed_official 76:aeb1df146756 131
mbed_official 76:aeb1df146756 132 int i2c_read(i2c_t *obj, int address, char *data, int length, int stop) {
mbed_official 76:aeb1df146756 133 I2C_TypeDef *i2c = (I2C_TypeDef *)(obj->i2c);
mbed_official 76:aeb1df146756 134 int timeout;
mbed_official 76:aeb1df146756 135 int count;
mbed_official 76:aeb1df146756 136 int value;
mbed_official 76:aeb1df146756 137
mbed_official 76:aeb1df146756 138 if (length == 0) return 0;
mbed_official 76:aeb1df146756 139
mbed_official 76:aeb1df146756 140 /*
mbed_official 76:aeb1df146756 141 // Wait until the bus is not busy anymore
mbed_official 76:aeb1df146756 142 timeout = LONG_TIMEOUT;
mbed_official 76:aeb1df146756 143 while (I2C_GetFlagStatus(i2c, I2C_FLAG_BUSY) == SET) {
mbed_official 76:aeb1df146756 144 if ((timeout--) == 0) {
mbed_official 76:aeb1df146756 145 return 0;
mbed_official 76:aeb1df146756 146 }
mbed_official 76:aeb1df146756 147 }
mbed_official 76:aeb1df146756 148 */
mbed_official 76:aeb1df146756 149
mbed_official 76:aeb1df146756 150 i2c_start(obj);
mbed_official 76:aeb1df146756 151
mbed_official 76:aeb1df146756 152 // Send slave address for read
mbed_official 76:aeb1df146756 153 I2C_Send7bitAddress(i2c, address, I2C_Direction_Receiver);
mbed_official 76:aeb1df146756 154
mbed_official 76:aeb1df146756 155 // Wait address is acknowledged
mbed_official 76:aeb1df146756 156 timeout = FLAG_TIMEOUT;
mbed_official 76:aeb1df146756 157 while (I2C_CheckEvent(i2c, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED) == ERROR) {
mbed_official 76:aeb1df146756 158 if ((timeout--) == 0) {
mbed_official 76:aeb1df146756 159 return 0;
mbed_official 76:aeb1df146756 160 }
mbed_official 76:aeb1df146756 161 }
mbed_official 76:aeb1df146756 162
mbed_official 76:aeb1df146756 163 // Read all bytes except last one
mbed_official 76:aeb1df146756 164 for (count = 0; count < (length - 1); count++) {
mbed_official 76:aeb1df146756 165 value = i2c_byte_read(obj, 0);
mbed_official 76:aeb1df146756 166 data[count] = (char)value;
mbed_official 76:aeb1df146756 167 }
mbed_official 76:aeb1df146756 168
mbed_official 76:aeb1df146756 169 // If not repeated start, send stop.
mbed_official 76:aeb1df146756 170 // Warning: must be done BEFORE the data is read.
mbed_official 76:aeb1df146756 171 if (stop) {
mbed_official 76:aeb1df146756 172 i2c_stop(obj);
mbed_official 76:aeb1df146756 173 }
mbed_official 76:aeb1df146756 174
mbed_official 76:aeb1df146756 175 // Read the last byte
mbed_official 76:aeb1df146756 176 value = i2c_byte_read(obj, 1);
mbed_official 76:aeb1df146756 177 data[count] = (char)value;
mbed_official 76:aeb1df146756 178
mbed_official 76:aeb1df146756 179 return length;
mbed_official 76:aeb1df146756 180 }
mbed_official 76:aeb1df146756 181
mbed_official 76:aeb1df146756 182 int i2c_write(i2c_t *obj, int address, const char *data, int length, int stop) {
mbed_official 76:aeb1df146756 183 I2C_TypeDef *i2c = (I2C_TypeDef *)(obj->i2c);
mbed_official 76:aeb1df146756 184 int timeout;
mbed_official 76:aeb1df146756 185 int count;
mbed_official 76:aeb1df146756 186
mbed_official 76:aeb1df146756 187 /*
mbed_official 76:aeb1df146756 188 // Wait until the bus is not busy anymore
mbed_official 76:aeb1df146756 189 timeout = LONG_TIMEOUT;
mbed_official 76:aeb1df146756 190 while (I2C_GetFlagStatus(i2c, I2C_FLAG_BUSY) == SET) {
mbed_official 76:aeb1df146756 191 if ((timeout--) == 0) {
mbed_official 76:aeb1df146756 192 return 0;
mbed_official 76:aeb1df146756 193 }
mbed_official 76:aeb1df146756 194 }
mbed_official 76:aeb1df146756 195 */
mbed_official 76:aeb1df146756 196
mbed_official 76:aeb1df146756 197 i2c_start(obj);
mbed_official 76:aeb1df146756 198
mbed_official 76:aeb1df146756 199 // Send slave address for write
mbed_official 76:aeb1df146756 200 I2C_Send7bitAddress(i2c, address, I2C_Direction_Transmitter);
mbed_official 76:aeb1df146756 201
mbed_official 76:aeb1df146756 202 // Wait address is acknowledged
mbed_official 76:aeb1df146756 203 timeout = FLAG_TIMEOUT;
mbed_official 76:aeb1df146756 204 while (I2C_CheckEvent(i2c, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED) == ERROR) {
mbed_official 76:aeb1df146756 205 if ((timeout--) == 0) {
mbed_official 76:aeb1df146756 206 return 0;
mbed_official 76:aeb1df146756 207 }
mbed_official 76:aeb1df146756 208 }
mbed_official 76:aeb1df146756 209
mbed_official 76:aeb1df146756 210 for (count = 0; count < length; count++) {
mbed_official 76:aeb1df146756 211 if (i2c_byte_write(obj, data[count]) != 1) {
mbed_official 76:aeb1df146756 212 i2c_stop(obj);
mbed_official 76:aeb1df146756 213 return 0;
mbed_official 76:aeb1df146756 214 }
mbed_official 76:aeb1df146756 215 }
mbed_official 76:aeb1df146756 216
mbed_official 76:aeb1df146756 217 // If not repeated start, send stop.
mbed_official 76:aeb1df146756 218 if (stop) {
mbed_official 76:aeb1df146756 219 i2c_stop(obj);
mbed_official 76:aeb1df146756 220 }
mbed_official 76:aeb1df146756 221
mbed_official 76:aeb1df146756 222 return count;
mbed_official 76:aeb1df146756 223 }
mbed_official 76:aeb1df146756 224
mbed_official 76:aeb1df146756 225 int i2c_byte_read(i2c_t *obj, int last) {
mbed_official 76:aeb1df146756 226 I2C_TypeDef *i2c = (I2C_TypeDef *)(obj->i2c);
mbed_official 76:aeb1df146756 227 uint8_t data;
mbed_official 76:aeb1df146756 228 int timeout;
mbed_official 76:aeb1df146756 229
mbed_official 76:aeb1df146756 230 if (last) {
mbed_official 76:aeb1df146756 231 // Don't acknowledge the last byte
mbed_official 76:aeb1df146756 232 I2C_AcknowledgeConfig(i2c, DISABLE);
mbed_official 76:aeb1df146756 233 } else {
mbed_official 76:aeb1df146756 234 // Acknowledge the byte
mbed_official 76:aeb1df146756 235 I2C_AcknowledgeConfig(i2c, ENABLE);
mbed_official 76:aeb1df146756 236 }
mbed_official 76:aeb1df146756 237
mbed_official 76:aeb1df146756 238 // Wait until the byte is received
mbed_official 76:aeb1df146756 239 timeout = FLAG_TIMEOUT;
mbed_official 76:aeb1df146756 240 while (I2C_GetFlagStatus(i2c, I2C_FLAG_RXNE) == RESET) {
mbed_official 76:aeb1df146756 241 if ((timeout--) == 0) {
mbed_official 76:aeb1df146756 242 return 0;
mbed_official 76:aeb1df146756 243 }
mbed_official 76:aeb1df146756 244 }
mbed_official 76:aeb1df146756 245
mbed_official 76:aeb1df146756 246 data = I2C_ReceiveData(i2c);
mbed_official 76:aeb1df146756 247
mbed_official 76:aeb1df146756 248 return (int)data;
mbed_official 76:aeb1df146756 249 }
mbed_official 76:aeb1df146756 250
mbed_official 76:aeb1df146756 251 int i2c_byte_write(i2c_t *obj, int data) {
mbed_official 76:aeb1df146756 252 I2C_TypeDef *i2c = (I2C_TypeDef *)(obj->i2c);
mbed_official 76:aeb1df146756 253 int timeout;
mbed_official 76:aeb1df146756 254
mbed_official 76:aeb1df146756 255 I2C_SendData(i2c, (uint8_t)data);
mbed_official 76:aeb1df146756 256
mbed_official 76:aeb1df146756 257 // Wait until the byte is transmitted
mbed_official 76:aeb1df146756 258 timeout = FLAG_TIMEOUT;
mbed_official 76:aeb1df146756 259 //while (I2C_CheckEvent(i2c, I2C_EVENT_MASTER_BYTE_TRANSMITTED) == ERROR) {
mbed_official 76:aeb1df146756 260 while ((I2C_GetFlagStatus(i2c, I2C_FLAG_TXE) == RESET) &&
mbed_official 76:aeb1df146756 261 (I2C_GetFlagStatus(i2c, I2C_FLAG_BTF) == RESET)) {
mbed_official 76:aeb1df146756 262 if ((timeout--) == 0) {
mbed_official 76:aeb1df146756 263 return 0;
mbed_official 76:aeb1df146756 264 }
mbed_official 76:aeb1df146756 265 }
mbed_official 76:aeb1df146756 266
mbed_official 76:aeb1df146756 267 return 1;
mbed_official 76:aeb1df146756 268 }
mbed_official 76:aeb1df146756 269
mbed_official 76:aeb1df146756 270 void i2c_reset(i2c_t *obj) {
mbed_official 76:aeb1df146756 271 if (obj->i2c == I2C_1) {
mbed_official 76:aeb1df146756 272 RCC_APB1PeriphResetCmd(RCC_APB1Periph_I2C1, ENABLE);
mbed_official 76:aeb1df146756 273 RCC_APB1PeriphResetCmd(RCC_APB1Periph_I2C1, DISABLE);
mbed_official 76:aeb1df146756 274 }
mbed_official 76:aeb1df146756 275 if (obj->i2c == I2C_2) {
mbed_official 76:aeb1df146756 276 RCC_APB1PeriphResetCmd(RCC_APB1Periph_I2C2, ENABLE);
mbed_official 76:aeb1df146756 277 RCC_APB1PeriphResetCmd(RCC_APB1Periph_I2C2, DISABLE);
mbed_official 76:aeb1df146756 278 }
mbed_official 76:aeb1df146756 279 }
mbed_official 76:aeb1df146756 280
mbed_official 76:aeb1df146756 281 #if DEVICE_I2CSLAVE
mbed_official 76:aeb1df146756 282
mbed_official 76:aeb1df146756 283 void i2c_slave_address(i2c_t *obj, int idx, uint32_t address, uint32_t mask) {
mbed_official 76:aeb1df146756 284 I2C_TypeDef *i2c = (I2C_TypeDef *)(obj->i2c);
mbed_official 76:aeb1df146756 285 uint16_t tmpreg;
mbed_official 76:aeb1df146756 286
mbed_official 76:aeb1df146756 287 // Get the old register value
mbed_official 76:aeb1df146756 288 tmpreg = i2c->OAR1;
mbed_official 76:aeb1df146756 289 // Reset address bits
mbed_official 76:aeb1df146756 290 tmpreg &= 0xFC00;
mbed_official 76:aeb1df146756 291 // Set new address
mbed_official 76:aeb1df146756 292 tmpreg |= (uint16_t)((uint16_t)address & (uint16_t)0x00FE); // 7-bits
mbed_official 76:aeb1df146756 293 // Store the new register value
mbed_official 76:aeb1df146756 294 i2c->OAR1 = tmpreg;
mbed_official 76:aeb1df146756 295 }
mbed_official 76:aeb1df146756 296
mbed_official 76:aeb1df146756 297 void i2c_slave_mode(i2c_t *obj, int enable_slave) {
mbed_official 76:aeb1df146756 298 // Nothing to do
mbed_official 76:aeb1df146756 299 }
mbed_official 76:aeb1df146756 300
mbed_official 76:aeb1df146756 301 // See I2CSlave.h
mbed_official 76:aeb1df146756 302 #define NoData 0 // the slave has not been addressed
mbed_official 76:aeb1df146756 303 #define ReadAddressed 1 // the master has requested a read from this slave (slave = transmitter)
mbed_official 76:aeb1df146756 304 #define WriteGeneral 2 // the master is writing to all slave
mbed_official 76:aeb1df146756 305 #define WriteAddressed 3 // the master is writing to this slave (slave = receiver)
mbed_official 76:aeb1df146756 306
mbed_official 76:aeb1df146756 307 int i2c_slave_receive(i2c_t *obj) {
mbed_official 76:aeb1df146756 308 // TO BE DONE
mbed_official 76:aeb1df146756 309 return(0);
mbed_official 76:aeb1df146756 310 }
mbed_official 76:aeb1df146756 311
mbed_official 76:aeb1df146756 312 int i2c_slave_read(i2c_t *obj, char *data, int length) {
mbed_official 76:aeb1df146756 313 int count = 0;
mbed_official 76:aeb1df146756 314
mbed_official 76:aeb1df146756 315 // Read all bytes
mbed_official 76:aeb1df146756 316 for (count = 0; count < length; count++) {
mbed_official 76:aeb1df146756 317 data[count] = i2c_byte_read(obj, 0);
mbed_official 76:aeb1df146756 318 }
mbed_official 76:aeb1df146756 319
mbed_official 76:aeb1df146756 320 return count;
mbed_official 76:aeb1df146756 321 }
mbed_official 76:aeb1df146756 322
mbed_official 76:aeb1df146756 323 int i2c_slave_write(i2c_t *obj, const char *data, int length) {
mbed_official 76:aeb1df146756 324 int count = 0;
mbed_official 76:aeb1df146756 325
mbed_official 76:aeb1df146756 326 // Write all bytes
mbed_official 76:aeb1df146756 327 for (count = 0; count < length; count++) {
mbed_official 76:aeb1df146756 328 i2c_byte_write(obj, data[count]);
mbed_official 76:aeb1df146756 329 }
mbed_official 76:aeb1df146756 330
mbed_official 76:aeb1df146756 331 return count;
mbed_official 76:aeb1df146756 332 }
mbed_official 76:aeb1df146756 333
mbed_official 76:aeb1df146756 334
mbed_official 76:aeb1df146756 335 #endif // DEVICE_I2CSLAVE
mbed_official 76:aeb1df146756 336
mbed_official 76:aeb1df146756 337 #endif // DEVICE_I2C