Arrow / Mbed OS DAPLink Reset

Repostiory containing DAPLink source code with Reset Pin workaround for HANI_IOT board.

Upstream: https://github.com/ARMmbed/DAPLink

source/family/arm/musca_b/i2c_gpio.c@0:01f31e923fe2, 2020-04-07 (annotated)

Committer:
Pawel Zarembski
Date:
Tue Apr 07 12:55:42 2020 +0200
Revision:
0:01f31e923fe2
hani: DAPLink with reset workaround

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Pawel Zarembski 0:01f31e923fe2 1 /**
Pawel Zarembski 0:01f31e923fe2 2 * @file i2c_gpio.c
Pawel Zarembski 0:01f31e923fe2 3 * @brief I2C GPIO control for musca PCA9537
Pawel Zarembski 0:01f31e923fe2 4 *
Pawel Zarembski 0:01f31e923fe2 5 * DAPLink Interface Firmware
Pawel Zarembski 0:01f31e923fe2 6 * Copyright (c) 2009-2016, ARM Limited, All Rights Reserved
Pawel Zarembski 0:01f31e923fe2 7 * SPDX-License-Identifier: Apache-2.0
Pawel Zarembski 0:01f31e923fe2 8 *
Pawel Zarembski 0:01f31e923fe2 9 * Licensed under the Apache License, Version 2.0 (the "License"); you may
Pawel Zarembski 0:01f31e923fe2 10 * not use this file except in compliance with the License.
Pawel Zarembski 0:01f31e923fe2 11 * You may obtain a copy of the License at
Pawel Zarembski 0:01f31e923fe2 12 *
Pawel Zarembski 0:01f31e923fe2 13 * http://www.apache.org/licenses/LICENSE-2.0
Pawel Zarembski 0:01f31e923fe2 14 *
Pawel Zarembski 0:01f31e923fe2 15 * Unless required by applicable law or agreed to in writing, software
Pawel Zarembski 0:01f31e923fe2 16 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
Pawel Zarembski 0:01f31e923fe2 17 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
Pawel Zarembski 0:01f31e923fe2 18 * See the License for the specific language governing permissions and
Pawel Zarembski 0:01f31e923fe2 19 * limitations under the License.
Pawel Zarembski 0:01f31e923fe2 20 */
Pawel Zarembski 0:01f31e923fe2 21
Pawel Zarembski 0:01f31e923fe2 22 #include "string.h"
Pawel Zarembski 0:01f31e923fe2 23 #include "stdio.h"
Pawel Zarembski 0:01f31e923fe2 24 #include "stdint.h"
Pawel Zarembski 0:01f31e923fe2 25
Pawel Zarembski 0:01f31e923fe2 26 #include "gpio.h"
Pawel Zarembski 0:01f31e923fe2 27 #include "utils.h"
Pawel Zarembski 0:01f31e923fe2 28 #include "i2c_gpio.h"
Pawel Zarembski 0:01f31e923fe2 29
Pawel Zarembski 0:01f31e923fe2 30 // Clock registers
Pawel Zarembski 0:01f31e923fe2 31 #define I2CGPIO_FREQ 6 // Sets OSC Clock SCL frequency
Pawel Zarembski 0:01f31e923fe2 32 #define I2CGPIO_WR 0 // Write command
Pawel Zarembski 0:01f31e923fe2 33 #define I2CGPIO_RD 1 // Read command
Pawel Zarembski 0:01f31e923fe2 34 #define I2CGPIO_ADDR 0x49 // Default slave address for PCA9537
Pawel Zarembski 0:01f31e923fe2 35
Pawel Zarembski 0:01f31e923fe2 36 /*----------------------------------------------------------------------------
Pawel Zarembski 0:01f31e923fe2 37 I2C Address + Wr + A
Pawel Zarembski 0:01f31e923fe2 38 *----------------------------------------------------------------------------*/
Pawel Zarembski 0:01f31e923fe2 39 void i2c_gpio_addr(unsigned int addr, unsigned int read)
Pawel Zarembski 0:01f31e923fe2 40 {
Pawel Zarembski 0:01f31e923fe2 41 unsigned int loop, data;
Pawel Zarembski 0:01f31e923fe2 42
Pawel Zarembski 0:01f31e923fe2 43 // Repeated Start condition (if required after Command)
Pawel Zarembski 0:01f31e923fe2 44 LPC_GPIO->DIR[PIN_I2C_SCL_PORT] &= ~PIN_I2C_SCL;
Pawel Zarembski 0:01f31e923fe2 45 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 46 LPC_GPIO->DIR[PIN_I2C_SDA_PORT] &= ~PIN_I2C_SDA;
Pawel Zarembski 0:01f31e923fe2 47 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 48
Pawel Zarembski 0:01f31e923fe2 49 // Start condition 'S' (DATA > CLK)
Pawel Zarembski 0:01f31e923fe2 50 LPC_GPIO->DIR[PIN_I2C_SDA_PORT] |= PIN_I2C_SDA;
Pawel Zarembski 0:01f31e923fe2 51 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 52 LPC_GPIO->DIR[PIN_I2C_SCL_PORT] |= PIN_I2C_SCL;
Pawel Zarembski 0:01f31e923fe2 53 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 54
Pawel Zarembski 0:01f31e923fe2 55 // Addr is 7 bits so add Read
Pawel Zarembski 0:01f31e923fe2 56 data = (addr << 1) & 0xFE;
Pawel Zarembski 0:01f31e923fe2 57 if (read)
Pawel Zarembski 0:01f31e923fe2 58 data |= 0x01;
Pawel Zarembski 0:01f31e923fe2 59
Pawel Zarembski 0:01f31e923fe2 60 // Clock out the 8 bits
Pawel Zarembski 0:01f31e923fe2 61 for (loop = 0; loop < 8; loop++)
Pawel Zarembski 0:01f31e923fe2 62 {
Pawel Zarembski 0:01f31e923fe2 63 if (data & (0x80 >> loop))
Pawel Zarembski 0:01f31e923fe2 64 {
Pawel Zarembski 0:01f31e923fe2 65 LPC_GPIO->DIR[PIN_I2C_SDA_PORT] &= ~PIN_I2C_SDA;
Pawel Zarembski 0:01f31e923fe2 66 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 67 LPC_GPIO->DIR[PIN_I2C_SCL_PORT] &= ~PIN_I2C_SCL;
Pawel Zarembski 0:01f31e923fe2 68 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 69 LPC_GPIO->DIR[PIN_I2C_SCL_PORT] |= PIN_I2C_SCL;
Pawel Zarembski 0:01f31e923fe2 70 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 71 }
Pawel Zarembski 0:01f31e923fe2 72 else
Pawel Zarembski 0:01f31e923fe2 73 {
Pawel Zarembski 0:01f31e923fe2 74 LPC_GPIO->DIR[PIN_I2C_SDA_PORT] |= PIN_I2C_SDA;
Pawel Zarembski 0:01f31e923fe2 75 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 76 LPC_GPIO->DIR[PIN_I2C_SCL_PORT] &= ~PIN_I2C_SCL;
Pawel Zarembski 0:01f31e923fe2 77 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 78 LPC_GPIO->DIR[PIN_I2C_SCL_PORT] |= PIN_I2C_SCL;
Pawel Zarembski 0:01f31e923fe2 79 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 80 }
Pawel Zarembski 0:01f31e923fe2 81 }
Pawel Zarembski 0:01f31e923fe2 82
Pawel Zarembski 0:01f31e923fe2 83 // Set data low
Pawel Zarembski 0:01f31e923fe2 84 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 85 LPC_GPIO->DIR[PIN_I2C_SDA_PORT] |= PIN_I2C_SDA;
Pawel Zarembski 0:01f31e923fe2 86 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 87
Pawel Zarembski 0:01f31e923fe2 88 // Transmission clock 'A'
Pawel Zarembski 0:01f31e923fe2 89 LPC_GPIO->DIR[PIN_I2C_SCL_PORT] &= ~PIN_I2C_SCL;
Pawel Zarembski 0:01f31e923fe2 90 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 91 LPC_GPIO->DIR[PIN_I2C_SCL_PORT] |= PIN_I2C_SCL;
Pawel Zarembski 0:01f31e923fe2 92 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 93 }
Pawel Zarembski 0:01f31e923fe2 94
Pawel Zarembski 0:01f31e923fe2 95 /*----------------------------------------------------------------------------
Pawel Zarembski 0:01f31e923fe2 96 I2C Command + A
Pawel Zarembski 0:01f31e923fe2 97 *----------------------------------------------------------------------------*/
Pawel Zarembski 0:01f31e923fe2 98 void i2c_gpio_cmd(unsigned int cmd)
Pawel Zarembski 0:01f31e923fe2 99 {
Pawel Zarembski 0:01f31e923fe2 100 unsigned int loop;
Pawel Zarembski 0:01f31e923fe2 101
Pawel Zarembski 0:01f31e923fe2 102 // Clock out the 8 bits
Pawel Zarembski 0:01f31e923fe2 103 for (loop = 0; loop < 8; loop++)
Pawel Zarembski 0:01f31e923fe2 104 {
Pawel Zarembski 0:01f31e923fe2 105 if (cmd & (0x80 >> loop))
Pawel Zarembski 0:01f31e923fe2 106 {
Pawel Zarembski 0:01f31e923fe2 107 LPC_GPIO->DIR[PIN_I2C_SDA_PORT] &= ~PIN_I2C_SDA;
Pawel Zarembski 0:01f31e923fe2 108 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 109 LPC_GPIO->DIR[PIN_I2C_SCL_PORT] &= ~PIN_I2C_SCL;
Pawel Zarembski 0:01f31e923fe2 110 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 111 LPC_GPIO->DIR[PIN_I2C_SCL_PORT] |= PIN_I2C_SCL;
Pawel Zarembski 0:01f31e923fe2 112 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 113 }
Pawel Zarembski 0:01f31e923fe2 114 else
Pawel Zarembski 0:01f31e923fe2 115 {
Pawel Zarembski 0:01f31e923fe2 116 LPC_GPIO->DIR[PIN_I2C_SDA_PORT] |= PIN_I2C_SDA;
Pawel Zarembski 0:01f31e923fe2 117 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 118 LPC_GPIO->DIR[PIN_I2C_SCL_PORT] &= ~PIN_I2C_SCL;
Pawel Zarembski 0:01f31e923fe2 119 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 120 LPC_GPIO->DIR[PIN_I2C_SCL_PORT] |= PIN_I2C_SCL;
Pawel Zarembski 0:01f31e923fe2 121 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 122 }
Pawel Zarembski 0:01f31e923fe2 123 }
Pawel Zarembski 0:01f31e923fe2 124
Pawel Zarembski 0:01f31e923fe2 125 // Set data low
Pawel Zarembski 0:01f31e923fe2 126 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 127 LPC_GPIO->DIR[PIN_I2C_SDA_PORT] |= PIN_I2C_SDA;
Pawel Zarembski 0:01f31e923fe2 128 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 129
Pawel Zarembski 0:01f31e923fe2 130 // Transmission clock 'A'
Pawel Zarembski 0:01f31e923fe2 131 LPC_GPIO->DIR[PIN_I2C_SCL_PORT] &= ~PIN_I2C_SCL;
Pawel Zarembski 0:01f31e923fe2 132 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 133 LPC_GPIO->DIR[PIN_I2C_SCL_PORT] |= PIN_I2C_SCL;
Pawel Zarembski 0:01f31e923fe2 134 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 135 }
Pawel Zarembski 0:01f31e923fe2 136
Pawel Zarembski 0:01f31e923fe2 137 /*----------------------------------------------------------------------------
Pawel Zarembski 0:01f31e923fe2 138 I2C Write Data + A + P
Pawel Zarembski 0:01f31e923fe2 139 *----------------------------------------------------------------------------*/
Pawel Zarembski 0:01f31e923fe2 140 void i2c_gpio_write(unsigned int data)
Pawel Zarembski 0:01f31e923fe2 141 {
Pawel Zarembski 0:01f31e923fe2 142 unsigned int loop;
Pawel Zarembski 0:01f31e923fe2 143
Pawel Zarembski 0:01f31e923fe2 144 // Clock out the 8 bits
Pawel Zarembski 0:01f31e923fe2 145 for (loop = 0; loop < 8; loop++)
Pawel Zarembski 0:01f31e923fe2 146 {
Pawel Zarembski 0:01f31e923fe2 147 if (data & (0x80 >> loop))
Pawel Zarembski 0:01f31e923fe2 148 {
Pawel Zarembski 0:01f31e923fe2 149 LPC_GPIO->DIR[PIN_I2C_SDA_PORT] &= ~PIN_I2C_SDA;
Pawel Zarembski 0:01f31e923fe2 150 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 151 LPC_GPIO->DIR[PIN_I2C_SCL_PORT] &= ~PIN_I2C_SCL;
Pawel Zarembski 0:01f31e923fe2 152 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 153 LPC_GPIO->DIR[PIN_I2C_SCL_PORT] |= PIN_I2C_SCL;
Pawel Zarembski 0:01f31e923fe2 154 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 155 }
Pawel Zarembski 0:01f31e923fe2 156 else
Pawel Zarembski 0:01f31e923fe2 157 {
Pawel Zarembski 0:01f31e923fe2 158 LPC_GPIO->DIR[PIN_I2C_SDA_PORT] |= PIN_I2C_SDA;
Pawel Zarembski 0:01f31e923fe2 159 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 160 LPC_GPIO->DIR[PIN_I2C_SCL_PORT] &= ~PIN_I2C_SCL;
Pawel Zarembski 0:01f31e923fe2 161 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 162 LPC_GPIO->DIR[PIN_I2C_SCL_PORT] |= PIN_I2C_SCL;
Pawel Zarembski 0:01f31e923fe2 163 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 164 }
Pawel Zarembski 0:01f31e923fe2 165 }
Pawel Zarembski 0:01f31e923fe2 166
Pawel Zarembski 0:01f31e923fe2 167 // Set data low
Pawel Zarembski 0:01f31e923fe2 168 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 169 LPC_GPIO->DIR[PIN_I2C_SDA_PORT] |= PIN_I2C_SDA;
Pawel Zarembski 0:01f31e923fe2 170 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 171
Pawel Zarembski 0:01f31e923fe2 172 // Transmission clock 'A'
Pawel Zarembski 0:01f31e923fe2 173 LPC_GPIO->DIR[PIN_I2C_SCL_PORT] &= ~PIN_I2C_SCL;
Pawel Zarembski 0:01f31e923fe2 174 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 175 LPC_GPIO->DIR[PIN_I2C_SCL_PORT] |= PIN_I2C_SCL;
Pawel Zarembski 0:01f31e923fe2 176 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 177
Pawel Zarembski 0:01f31e923fe2 178 // Stop condition 'P'
Pawel Zarembski 0:01f31e923fe2 179 LPC_GPIO->DIR[PIN_I2C_SCL_PORT] &= ~PIN_I2C_SCL;
Pawel Zarembski 0:01f31e923fe2 180 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 181 LPC_GPIO->DIR[PIN_I2C_SDA_PORT] &= ~PIN_I2C_SDA;
Pawel Zarembski 0:01f31e923fe2 182 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 183 }
Pawel Zarembski 0:01f31e923fe2 184
Pawel Zarembski 0:01f31e923fe2 185 /*----------------------------------------------------------------------------
Pawel Zarembski 0:01f31e923fe2 186 I2C Read Data + A + P
Pawel Zarembski 0:01f31e923fe2 187 *----------------------------------------------------------------------------*/
Pawel Zarembski 0:01f31e923fe2 188 void i2c_gpio_read(unsigned int *data, unsigned int ack)
Pawel Zarembski 0:01f31e923fe2 189 {
Pawel Zarembski 0:01f31e923fe2 190 unsigned int loop;
Pawel Zarembski 0:01f31e923fe2 191
Pawel Zarembski 0:01f31e923fe2 192 // Set SDA high (O/D) and allow PCA9537 to drive SDA
Pawel Zarembski 0:01f31e923fe2 193 LPC_GPIO->DIR[PIN_I2C_SDA_PORT] &= ~PIN_I2C_SDA;
Pawel Zarembski 0:01f31e923fe2 194 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 195
Pawel Zarembski 0:01f31e923fe2 196 // Clock in the 8 bits
Pawel Zarembski 0:01f31e923fe2 197 *data = 0;
Pawel Zarembski 0:01f31e923fe2 198 for (loop = 0; loop < 8; loop++)
Pawel Zarembski 0:01f31e923fe2 199 {
Pawel Zarembski 0:01f31e923fe2 200 LPC_GPIO->DIR[PIN_I2C_SCL_PORT] &= ~PIN_I2C_SCL;
Pawel Zarembski 0:01f31e923fe2 201 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 202 if (LPC_GPIO->DIR[PIN_I2C_SDA_PORT] & PIN_I2C_SDA)
Pawel Zarembski 0:01f31e923fe2 203 *data &= ~(0x80 >> loop);
Pawel Zarembski 0:01f31e923fe2 204 LPC_GPIO->DIR[PIN_I2C_SCL_PORT] |= PIN_I2C_SCL;
Pawel Zarembski 0:01f31e923fe2 205 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 206 }
Pawel Zarembski 0:01f31e923fe2 207
Pawel Zarembski 0:01f31e923fe2 208 // Set data for acknowledge
Pawel Zarembski 0:01f31e923fe2 209 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 210 if (ack)
Pawel Zarembski 0:01f31e923fe2 211 LPC_GPIO->DIR[PIN_I2C_SDA_PORT] |= PIN_I2C_SDA;
Pawel Zarembski 0:01f31e923fe2 212 else
Pawel Zarembski 0:01f31e923fe2 213 LPC_GPIO->DIR[PIN_I2C_SDA_PORT] &= ~PIN_I2C_SDA;
Pawel Zarembski 0:01f31e923fe2 214 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 215
Pawel Zarembski 0:01f31e923fe2 216 // Transmission clock 'A'
Pawel Zarembski 0:01f31e923fe2 217 LPC_GPIO->DIR[PIN_I2C_SCL_PORT] &= ~PIN_I2C_SCL;
Pawel Zarembski 0:01f31e923fe2 218 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 219 LPC_GPIO->DIR[PIN_I2C_SCL_PORT] |= PIN_I2C_SCL;
Pawel Zarembski 0:01f31e923fe2 220 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 221
Pawel Zarembski 0:01f31e923fe2 222 // End of acknowledge
Pawel Zarembski 0:01f31e923fe2 223 LPC_GPIO->DIR[PIN_I2C_SDA_PORT] |= PIN_I2C_SDA;
Pawel Zarembski 0:01f31e923fe2 224 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 225
Pawel Zarembski 0:01f31e923fe2 226 // Stop condition 'P'
Pawel Zarembski 0:01f31e923fe2 227 LPC_GPIO->DIR[PIN_I2C_SCL_PORT] &= ~PIN_I2C_SCL;
Pawel Zarembski 0:01f31e923fe2 228 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 229 LPC_GPIO->DIR[PIN_I2C_SDA_PORT] &= ~PIN_I2C_SDA;
Pawel Zarembski 0:01f31e923fe2 230 delay_us(I2CGPIO_FREQ);
Pawel Zarembski 0:01f31e923fe2 231 }
Pawel Zarembski 0:01f31e923fe2 232
Pawel Zarembski 0:01f31e923fe2 233 /*----------------------------------------------------------------------------
Pawel Zarembski 0:01f31e923fe2 234 I2C Write byte
Pawel Zarembski 0:01f31e923fe2 235 *----------------------------------------------------------------------------*/
Pawel Zarembski 0:01f31e923fe2 236 void i2c_gpio_wbyte(unsigned int cmd, unsigned int data)
Pawel Zarembski 0:01f31e923fe2 237 {
Pawel Zarembski 0:01f31e923fe2 238 // Set slave address write
Pawel Zarembski 0:01f31e923fe2 239 i2c_gpio_addr(I2CGPIO_ADDR, I2CGPIO_WR);
Pawel Zarembski 0:01f31e923fe2 240 // Set command
Pawel Zarembski 0:01f31e923fe2 241 i2c_gpio_cmd(cmd);
Pawel Zarembski 0:01f31e923fe2 242 // Write the data
Pawel Zarembski 0:01f31e923fe2 243 i2c_gpio_write(data);
Pawel Zarembski 0:01f31e923fe2 244 }
Pawel Zarembski 0:01f31e923fe2 245
Pawel Zarembski 0:01f31e923fe2 246 /*----------------------------------------------------------------------------
Pawel Zarembski 0:01f31e923fe2 247 I2C Read byte
Pawel Zarembski 0:01f31e923fe2 248 *----------------------------------------------------------------------------*/
Pawel Zarembski 0:01f31e923fe2 249 void i2c_gpio_rbyte(unsigned int cmd, unsigned int *data)
Pawel Zarembski 0:01f31e923fe2 250 {
Pawel Zarembski 0:01f31e923fe2 251 // Set slave address write
Pawel Zarembski 0:01f31e923fe2 252 i2c_gpio_addr(I2CGPIO_ADDR, I2CGPIO_WR);
Pawel Zarembski 0:01f31e923fe2 253 // Set command
Pawel Zarembski 0:01f31e923fe2 254 i2c_gpio_cmd(cmd);
Pawel Zarembski 0:01f31e923fe2 255
Pawel Zarembski 0:01f31e923fe2 256 // Set slave address write
Pawel Zarembski 0:01f31e923fe2 257 i2c_gpio_addr(I2CGPIO_ADDR, I2CGPIO_RD);
Pawel Zarembski 0:01f31e923fe2 258 // Read the data
Pawel Zarembski 0:01f31e923fe2 259 i2c_gpio_read(data, 0);
Pawel Zarembski 0:01f31e923fe2 260 }
Pawel Zarembski 0:01f31e923fe2 261
Pawel Zarembski 0:01f31e923fe2 262 // end of i2c_gpio.c