src/main/pg/bus_i2c.c

   1 /*
   2  * This file is part of Cleanflight and Betaflight.
   3  *
   4  * Cleanflight and Betaflight are free software. You can redistribute
   5  * this software and/or modify this software under the terms of the
   6  * GNU General Public License as published by the Free Software
   7  * Foundation, either version 3 of the License, or (at your option)
   8  * any later version.
   9  *
  10  * Cleanflight and Betaflight are distributed in the hope that they
  11  * will be useful, but WITHOUT ANY WARRANTY; without even the implied
  12  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  13  * See the GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this software.
  17  *
  18  * If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 /*
  22  * Created by jflyper
  23  */
  24
  25 #include <stdbool.h>
  26 #include <stddef.h>
  27 #include <string.h>
  28
  29 #include "platform.h"
  30
  31 #if defined(USE_I2C) && !defined(SOFT_I2C)
  32
  33 #include "common/utils.h"
  34
  35 #include "drivers/io.h"
  36
  37 #include "pg/pg.h"
  38 #include "pg/pg_ids.h"
  39
  40 #include "pg/bus_i2c.h"
  41
  42 #ifdef I2C_FULL_RECONFIGURABILITY
  43 #if I2CDEV_COUNT >= 1
  44 #ifndef I2C1_SCL
  45 #define I2C1_SCL NONE
  46 #endif
  47 #ifndef I2C1_SDA
  48 #define I2C1_SDA NONE
  49 #endif
  50 #endif
  51
  52 #if I2CDEV_COUNT >= 2
  53 #ifndef I2C2_SCL
  54 #define I2C2_SCL NONE
  55 #endif
  56 #ifndef I2C2_SDA
  57 #define I2C2_SDA NONE
  58 #endif
  59 #endif
  60
  61 #if I2CDEV_COUNT >= 3
  62 #ifndef I2C3_SCL
  63 #define I2C3_SCL NONE
  64 #endif
  65 #ifndef I2C3_SDA
  66 #define I2C3_SDA NONE
  67 #endif
  68 #endif
  69
  70 #if I2CDEV_COUNT >= 4
  71 #ifndef I2C4_SCL
  72 #define I2C4_SCL NONE
  73 #endif
  74 #ifndef I2C4_SDA
  75 #define I2C4_SDA NONE
  76 #endif
  77 #endif
  78
  79 #else // I2C_FULL_RECONFIGURABILITY
  80
  81 // Backward compatibility for exisiting targets
  82
  83 #ifdef STM32F1
  84 #ifndef I2C1_SCL
  85 #define I2C1_SCL PB8
  86 #endif
  87 #ifndef I2C1_SDA
  88 #define I2C1_SDA PB9
  89 #endif
  90 #ifndef I2C2_SCL
  91 #define I2C2_SCL PB10
  92 #endif
  93 #ifndef I2C2_SDA
  94 #define I2C2_SDA PB11
  95 #endif
  96 #endif // STM32F1
  97
  98 #ifdef STM32F3
  99 #ifndef I2C1_SCL
 100 #define I2C1_SCL PB6
 101 #endif
 102 #ifndef I2C1_SDA
 103 #define I2C1_SDA PB7
 104 #endif
 105 #ifndef I2C2_SCL
 106 #define I2C2_SCL PA9
 107 #endif
 108 #ifndef I2C2_SDA
 109 #define I2C2_SDA PA10
 110 #endif
 111 #endif // STM32F3
 112
 113 #ifdef STM32F4
 114 #ifndef I2C1_SCL
 115 #define I2C1_SCL PB6
 116 #endif
 117 #ifndef I2C1_SDA
 118 #define I2C1_SDA PB7
 119 #endif
 120 #ifndef I2C2_SCL
 121 #define I2C2_SCL PB10
 122 #endif
 123 #ifndef I2C2_SDA
 124 #define I2C2_SDA PB11
 125 #endif
 126 #ifndef I2C3_SCL
 127 #define I2C3_SCL PA8
 128 #endif
 129 #ifndef I2C3_SDA
 130 #define I2C3_SDA PC9
 131 #endif
 132 #endif // STM32F4
 133
 134 #ifdef STM32F7
 135 #ifndef I2C1_SCL
 136 #define I2C1_SCL PB6
 137 #endif
 138 #ifndef I2C1_SDA
 139 #define I2C1_SDA PB7
 140 #endif
 141 #ifndef I2C2_SCL
 142 #define I2C2_SCL PB10
 143 #endif
 144 #ifndef I2C2_SDA
 145 #define I2C2_SDA PB11
 146 #endif
 147 #ifndef I2C3_SCL
 148 #define I2C3_SCL PA8
 149 #endif
 150 #ifndef I2C3_SDA
 151 #define I2C3_SDA PB4
 152 #endif
 153 #ifndef I2C4_SCL
 154 #define I2C4_SCL PD12
 155 #endif
 156 #ifndef I2C4_SDA
 157 #define I2C4_SDA PD13
 158 #endif
 159 #endif // STM32F7
 160
 161 #endif // I2C_FULL_RECONFIGURABILITY
 162
 163 // Default values for internal pullup
 164
 165 #if defined(USE_I2C_PULLUP)
 166 #define I2C1_PULLUP true
 167 #define I2C2_PULLUP true
 168 #define I2C3_PULLUP true
 169 #define I2C4_PULLUP true
 170 #else
 171 #define I2C1_PULLUP false
 172 #define I2C2_PULLUP false
 173 #define I2C3_PULLUP false
 174 #define I2C4_PULLUP false
 175 #endif
 176
 177 typedef struct i2cDefaultConfig_s {
 178     I2CDevice device;
 179     ioTag_t ioTagScl, ioTagSda;
 180     bool overClock;
 181     bool pullUp;
 182 } i2cDefaultConfig_t;
 183
 184 static const i2cDefaultConfig_t i2cDefaultConfig[] = {
 185 #ifdef USE_I2C_DEVICE_1
 186     { I2CDEV_1, IO_TAG(I2C1_SCL), IO_TAG(I2C1_SDA), I2C1_OVERCLOCK, I2C1_PULLUP },
 187 #endif
 188 #ifdef USE_I2C_DEVICE_2
 189     { I2CDEV_2, IO_TAG(I2C2_SCL), IO_TAG(I2C2_SDA), I2C2_OVERCLOCK, I2C2_PULLUP },
 190 #endif
 191 #ifdef USE_I2C_DEVICE_3
 192     { I2CDEV_3, IO_TAG(I2C3_SCL), IO_TAG(I2C3_SDA), I2C3_OVERCLOCK, I2C3_PULLUP },
 193 #endif
 194 #ifdef USE_I2C_DEVICE_4
 195     { I2CDEV_4, IO_TAG(I2C4_SCL), IO_TAG(I2C4_SDA), I2C4_OVERCLOCK, I2C4_PULLUP },
 196 #endif
 197 };
 198
 199 void pgResetFn_i2cConfig(i2cConfig_t *i2cConfig)
 200 {
 201     memset(i2cConfig, 0, sizeof(*i2cConfig));
 202
 203     for (size_t index = 0 ; index < ARRAYLEN(i2cDefaultConfig) ; index++) {
 204         const i2cDefaultConfig_t *defconf = &i2cDefaultConfig[index];
 205         i2cConfig->ioTagScl[defconf->device] = defconf->ioTagScl;
 206         i2cConfig->ioTagSda[defconf->device] = defconf->ioTagSda;
 207         i2cConfig->overClock[defconf->device] = defconf->overClock;
 208         i2cConfig->pullUp[defconf->device] = defconf->pullUp;
 209     }
 210 }
 211
 212 PG_REGISTER_WITH_RESET_FN(i2cConfig_t, i2cConfig, PG_I2C_CONFIG, 0);
 213
 214 #endif // defined(USE_I2C) && !defined(USE_SOFT_I2C)