Mouse code for the MacroRat
mbed-dev/targets/TARGET_ARM_SSG/TARGET_IOTSS/i2c_api.c@46:b156ef445742, 2017-06-03 (annotated)
- Committer:
- sahilmgandhi
- Date:
- Sat Jun 03 00:22:44 2017 +0000
- Revision:
- 46:b156ef445742
- Parent:
- 18:6a4db94011d3
Final code for internal battlebot competition.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
sahilmgandhi | 18:6a4db94011d3 | 1 | /* mbed Microcontroller Library |
sahilmgandhi | 18:6a4db94011d3 | 2 | * Copyright (c) 2006-2015 ARM Limited |
sahilmgandhi | 18:6a4db94011d3 | 3 | * |
sahilmgandhi | 18:6a4db94011d3 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
sahilmgandhi | 18:6a4db94011d3 | 5 | * you may not use this file except in compliance with the License. |
sahilmgandhi | 18:6a4db94011d3 | 6 | * You may obtain a copy of the License at |
sahilmgandhi | 18:6a4db94011d3 | 7 | * |
sahilmgandhi | 18:6a4db94011d3 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
sahilmgandhi | 18:6a4db94011d3 | 9 | * |
sahilmgandhi | 18:6a4db94011d3 | 10 | * Unless required by applicable law or agreed to in writing, software |
sahilmgandhi | 18:6a4db94011d3 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
sahilmgandhi | 18:6a4db94011d3 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
sahilmgandhi | 18:6a4db94011d3 | 13 | * See the License for the specific language governing permissions and |
sahilmgandhi | 18:6a4db94011d3 | 14 | * limitations under the License. |
sahilmgandhi | 18:6a4db94011d3 | 15 | */ |
sahilmgandhi | 18:6a4db94011d3 | 16 | #include "i2c_api.h" |
sahilmgandhi | 18:6a4db94011d3 | 17 | #include "cmsis.h" |
sahilmgandhi | 18:6a4db94011d3 | 18 | #include "pinmap.h" |
sahilmgandhi | 18:6a4db94011d3 | 19 | #include "mbed_error.h" |
sahilmgandhi | 18:6a4db94011d3 | 20 | #include "SMM_MPS2.h" |
sahilmgandhi | 18:6a4db94011d3 | 21 | #include "mbed_wait_api.h" |
sahilmgandhi | 18:6a4db94011d3 | 22 | #include "fpga.h" |
sahilmgandhi | 18:6a4db94011d3 | 23 | |
sahilmgandhi | 18:6a4db94011d3 | 24 | // Types |
sahilmgandhi | 18:6a4db94011d3 | 25 | #undef FALSE |
sahilmgandhi | 18:6a4db94011d3 | 26 | #undef TRUE |
sahilmgandhi | 18:6a4db94011d3 | 27 | #define FALSE 0 |
sahilmgandhi | 18:6a4db94011d3 | 28 | #define TRUE 1 |
sahilmgandhi | 18:6a4db94011d3 | 29 | |
sahilmgandhi | 18:6a4db94011d3 | 30 | // TSC I2C controller |
sahilmgandhi | 18:6a4db94011d3 | 31 | #define TSC_I2C_ADDR 0x82 |
sahilmgandhi | 18:6a4db94011d3 | 32 | // AACI I2C controller I2C address |
sahilmgandhi | 18:6a4db94011d3 | 33 | #define AAIC_I2C_ADDR 0x96 |
sahilmgandhi | 18:6a4db94011d3 | 34 | // LM75B I2C address |
sahilmgandhi | 18:6a4db94011d3 | 35 | #define LM75_I2C_ADDR 0x90 |
sahilmgandhi | 18:6a4db94011d3 | 36 | // MMA7660 I2C address |
sahilmgandhi | 18:6a4db94011d3 | 37 | #define MMA7660_I2C_ADDR 0x98 |
sahilmgandhi | 18:6a4db94011d3 | 38 | |
sahilmgandhi | 18:6a4db94011d3 | 39 | // Timing Delays |
sahilmgandhi | 18:6a4db94011d3 | 40 | #define TSC_TSU 15 // Setup delay 600nS min |
sahilmgandhi | 18:6a4db94011d3 | 41 | #define AAIC_TSU 25 // Setup delay 1000nS min |
sahilmgandhi | 18:6a4db94011d3 | 42 | #define SHIELD_TSU 25 // Setup delay 1000nS min |
sahilmgandhi | 18:6a4db94011d3 | 43 | |
sahilmgandhi | 18:6a4db94011d3 | 44 | |
sahilmgandhi | 18:6a4db94011d3 | 45 | static const PinMap PinMap_I2C_SDA[] = { |
sahilmgandhi | 18:6a4db94011d3 | 46 | {TSC_SDA, I2C_0, 0}, |
sahilmgandhi | 18:6a4db94011d3 | 47 | {AUD_SDA, I2C_1, 0}, |
sahilmgandhi | 18:6a4db94011d3 | 48 | {SHIELD_0_SDA, I2C_2, 0}, |
sahilmgandhi | 18:6a4db94011d3 | 49 | {SHIELD_1_SDA, I2C_3, 0}, |
sahilmgandhi | 18:6a4db94011d3 | 50 | {NC , NC , 0} |
sahilmgandhi | 18:6a4db94011d3 | 51 | }; |
sahilmgandhi | 18:6a4db94011d3 | 52 | |
sahilmgandhi | 18:6a4db94011d3 | 53 | static const PinMap PinMap_I2C_SCL[] = { |
sahilmgandhi | 18:6a4db94011d3 | 54 | {TSC_SCL, I2C_0, 0}, |
sahilmgandhi | 18:6a4db94011d3 | 55 | {AUD_SCL, I2C_1, 0}, |
sahilmgandhi | 18:6a4db94011d3 | 56 | {SHIELD_0_SCL, I2C_2, 0}, |
sahilmgandhi | 18:6a4db94011d3 | 57 | {SHIELD_1_SCL, I2C_3, 0}, |
sahilmgandhi | 18:6a4db94011d3 | 58 | {NC , NC, 0} |
sahilmgandhi | 18:6a4db94011d3 | 59 | }; |
sahilmgandhi | 18:6a4db94011d3 | 60 | |
sahilmgandhi | 18:6a4db94011d3 | 61 | static inline void i2c_send_byte(i2c_t *obj, unsigned char c) |
sahilmgandhi | 18:6a4db94011d3 | 62 | { |
sahilmgandhi | 18:6a4db94011d3 | 63 | int loop; |
sahilmgandhi | 18:6a4db94011d3 | 64 | switch ((int)obj->i2c) { |
sahilmgandhi | 18:6a4db94011d3 | 65 | case I2C_0: |
sahilmgandhi | 18:6a4db94011d3 | 66 | obj->i2c->CONTROLC = SCL; |
sahilmgandhi | 18:6a4db94011d3 | 67 | i2c_delay(TSC_TSU); |
sahilmgandhi | 18:6a4db94011d3 | 68 | |
sahilmgandhi | 18:6a4db94011d3 | 69 | for (loop = 0; loop < 8; loop++) |
sahilmgandhi | 18:6a4db94011d3 | 70 | { |
sahilmgandhi | 18:6a4db94011d3 | 71 | if (c & (1 << (7 - loop))) |
sahilmgandhi | 18:6a4db94011d3 | 72 | obj->i2c->CONTROLS = SDA; |
sahilmgandhi | 18:6a4db94011d3 | 73 | else |
sahilmgandhi | 18:6a4db94011d3 | 74 | obj->i2c->CONTROLC = SDA; |
sahilmgandhi | 18:6a4db94011d3 | 75 | |
sahilmgandhi | 18:6a4db94011d3 | 76 | i2c_delay(TSC_TSU); |
sahilmgandhi | 18:6a4db94011d3 | 77 | obj->i2c->CONTROLS = SCL; |
sahilmgandhi | 18:6a4db94011d3 | 78 | i2c_delay(TSC_TSU); |
sahilmgandhi | 18:6a4db94011d3 | 79 | obj->i2c->CONTROLC = SCL; |
sahilmgandhi | 18:6a4db94011d3 | 80 | i2c_delay(TSC_TSU); |
sahilmgandhi | 18:6a4db94011d3 | 81 | } |
sahilmgandhi | 18:6a4db94011d3 | 82 | |
sahilmgandhi | 18:6a4db94011d3 | 83 | obj->i2c->CONTROLS = SDA; |
sahilmgandhi | 18:6a4db94011d3 | 84 | i2c_delay(TSC_TSU); |
sahilmgandhi | 18:6a4db94011d3 | 85 | break; |
sahilmgandhi | 18:6a4db94011d3 | 86 | case I2C_1: |
sahilmgandhi | 18:6a4db94011d3 | 87 | for (loop = 0; loop < 8; loop++) { |
sahilmgandhi | 18:6a4db94011d3 | 88 | i2c_delay(AAIC_TSU); |
sahilmgandhi | 18:6a4db94011d3 | 89 | obj->i2c->CONTROLC = SCL; |
sahilmgandhi | 18:6a4db94011d3 | 90 | i2c_delay(AAIC_TSU); |
sahilmgandhi | 18:6a4db94011d3 | 91 | if (c & (1 << (7 - loop))) |
sahilmgandhi | 18:6a4db94011d3 | 92 | obj->i2c->CONTROLS = SDA; |
sahilmgandhi | 18:6a4db94011d3 | 93 | else |
sahilmgandhi | 18:6a4db94011d3 | 94 | obj->i2c->CONTROLC = SDA; |
sahilmgandhi | 18:6a4db94011d3 | 95 | |
sahilmgandhi | 18:6a4db94011d3 | 96 | i2c_delay(AAIC_TSU); |
sahilmgandhi | 18:6a4db94011d3 | 97 | obj->i2c->CONTROLS = SCL; |
sahilmgandhi | 18:6a4db94011d3 | 98 | i2c_delay(AAIC_TSU); |
sahilmgandhi | 18:6a4db94011d3 | 99 | obj->i2c->CONTROLC = SCL; |
sahilmgandhi | 18:6a4db94011d3 | 100 | } |
sahilmgandhi | 18:6a4db94011d3 | 101 | |
sahilmgandhi | 18:6a4db94011d3 | 102 | i2c_delay(AAIC_TSU); |
sahilmgandhi | 18:6a4db94011d3 | 103 | obj->i2c->CONTROLS = SDA; |
sahilmgandhi | 18:6a4db94011d3 | 104 | i2c_delay(AAIC_TSU); |
sahilmgandhi | 18:6a4db94011d3 | 105 | break; |
sahilmgandhi | 18:6a4db94011d3 | 106 | case I2C_2: |
sahilmgandhi | 18:6a4db94011d3 | 107 | case I2C_3: |
sahilmgandhi | 18:6a4db94011d3 | 108 | obj->i2c->CONTROLC = SCL; |
sahilmgandhi | 18:6a4db94011d3 | 109 | i2c_delay(SHIELD_TSU); |
sahilmgandhi | 18:6a4db94011d3 | 110 | |
sahilmgandhi | 18:6a4db94011d3 | 111 | for (loop = 0; loop < 8; loop++) |
sahilmgandhi | 18:6a4db94011d3 | 112 | { |
sahilmgandhi | 18:6a4db94011d3 | 113 | if (c & (1 << (7 - loop))) |
sahilmgandhi | 18:6a4db94011d3 | 114 | obj->i2c->CONTROLS = SDA; |
sahilmgandhi | 18:6a4db94011d3 | 115 | else |
sahilmgandhi | 18:6a4db94011d3 | 116 | obj->i2c->CONTROLC = SDA; |
sahilmgandhi | 18:6a4db94011d3 | 117 | |
sahilmgandhi | 18:6a4db94011d3 | 118 | i2c_delay(SHIELD_TSU); |
sahilmgandhi | 18:6a4db94011d3 | 119 | obj->i2c->CONTROLS = SCL; |
sahilmgandhi | 18:6a4db94011d3 | 120 | i2c_delay(SHIELD_TSU); |
sahilmgandhi | 18:6a4db94011d3 | 121 | obj->i2c->CONTROLC = SCL; |
sahilmgandhi | 18:6a4db94011d3 | 122 | i2c_delay(SHIELD_TSU); |
sahilmgandhi | 18:6a4db94011d3 | 123 | } |
sahilmgandhi | 18:6a4db94011d3 | 124 | |
sahilmgandhi | 18:6a4db94011d3 | 125 | obj->i2c->CONTROLS = SDA; |
sahilmgandhi | 18:6a4db94011d3 | 126 | i2c_delay(SHIELD_TSU); |
sahilmgandhi | 18:6a4db94011d3 | 127 | break; |
sahilmgandhi | 18:6a4db94011d3 | 128 | } |
sahilmgandhi | 18:6a4db94011d3 | 129 | } |
sahilmgandhi | 18:6a4db94011d3 | 130 | |
sahilmgandhi | 18:6a4db94011d3 | 131 | static inline unsigned char i2c_receive_byte(i2c_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 132 | { |
sahilmgandhi | 18:6a4db94011d3 | 133 | int data_receive_byte, loop; |
sahilmgandhi | 18:6a4db94011d3 | 134 | switch ((int)obj->i2c) { |
sahilmgandhi | 18:6a4db94011d3 | 135 | case I2C_0: |
sahilmgandhi | 18:6a4db94011d3 | 136 | obj->i2c->CONTROLS = SDA; |
sahilmgandhi | 18:6a4db94011d3 | 137 | i2c_delay(TSC_TSU); |
sahilmgandhi | 18:6a4db94011d3 | 138 | |
sahilmgandhi | 18:6a4db94011d3 | 139 | data_receive_byte = 0; |
sahilmgandhi | 18:6a4db94011d3 | 140 | |
sahilmgandhi | 18:6a4db94011d3 | 141 | for (loop = 0; loop < 8; loop++) |
sahilmgandhi | 18:6a4db94011d3 | 142 | { |
sahilmgandhi | 18:6a4db94011d3 | 143 | obj->i2c->CONTROLS = SCL; |
sahilmgandhi | 18:6a4db94011d3 | 144 | i2c_delay(TSC_TSU); |
sahilmgandhi | 18:6a4db94011d3 | 145 | if ((obj->i2c->CONTROL & SDA)) |
sahilmgandhi | 18:6a4db94011d3 | 146 | data_receive_byte += (1 << (7 - loop)); |
sahilmgandhi | 18:6a4db94011d3 | 147 | |
sahilmgandhi | 18:6a4db94011d3 | 148 | obj->i2c->CONTROLC = SCL; |
sahilmgandhi | 18:6a4db94011d3 | 149 | i2c_delay(TSC_TSU); |
sahilmgandhi | 18:6a4db94011d3 | 150 | } |
sahilmgandhi | 18:6a4db94011d3 | 151 | |
sahilmgandhi | 18:6a4db94011d3 | 152 | obj->i2c->CONTROLC = SDA; |
sahilmgandhi | 18:6a4db94011d3 | 153 | i2c_delay(TSC_TSU); |
sahilmgandhi | 18:6a4db94011d3 | 154 | break; |
sahilmgandhi | 18:6a4db94011d3 | 155 | case I2C_1: |
sahilmgandhi | 18:6a4db94011d3 | 156 | obj->i2c->CONTROLS = SDA; |
sahilmgandhi | 18:6a4db94011d3 | 157 | data_receive_byte = 0; |
sahilmgandhi | 18:6a4db94011d3 | 158 | |
sahilmgandhi | 18:6a4db94011d3 | 159 | for (loop = 0; loop < 8; loop++) { |
sahilmgandhi | 18:6a4db94011d3 | 160 | i2c_delay(AAIC_TSU); |
sahilmgandhi | 18:6a4db94011d3 | 161 | obj->i2c->CONTROLC = SCL; |
sahilmgandhi | 18:6a4db94011d3 | 162 | i2c_delay(AAIC_TSU); |
sahilmgandhi | 18:6a4db94011d3 | 163 | obj->i2c->CONTROLS = SCL | SDA; |
sahilmgandhi | 18:6a4db94011d3 | 164 | i2c_delay(AAIC_TSU); |
sahilmgandhi | 18:6a4db94011d3 | 165 | if ((obj->i2c->CONTROL & SDA)) |
sahilmgandhi | 18:6a4db94011d3 | 166 | data_receive_byte += (1 << (7 - loop)); |
sahilmgandhi | 18:6a4db94011d3 | 167 | |
sahilmgandhi | 18:6a4db94011d3 | 168 | i2c_delay(AAIC_TSU); |
sahilmgandhi | 18:6a4db94011d3 | 169 | obj->i2c->CONTROLC = SCL; |
sahilmgandhi | 18:6a4db94011d3 | 170 | } |
sahilmgandhi | 18:6a4db94011d3 | 171 | |
sahilmgandhi | 18:6a4db94011d3 | 172 | i2c_delay(AAIC_TSU); |
sahilmgandhi | 18:6a4db94011d3 | 173 | obj->i2c->CONTROLC = SDA; |
sahilmgandhi | 18:6a4db94011d3 | 174 | i2c_delay(AAIC_TSU); |
sahilmgandhi | 18:6a4db94011d3 | 175 | break; |
sahilmgandhi | 18:6a4db94011d3 | 176 | case I2C_2: |
sahilmgandhi | 18:6a4db94011d3 | 177 | case I2C_3: |
sahilmgandhi | 18:6a4db94011d3 | 178 | obj->i2c->CONTROLS = SDA; |
sahilmgandhi | 18:6a4db94011d3 | 179 | i2c_delay(SHIELD_TSU); |
sahilmgandhi | 18:6a4db94011d3 | 180 | |
sahilmgandhi | 18:6a4db94011d3 | 181 | data_receive_byte = 0; |
sahilmgandhi | 18:6a4db94011d3 | 182 | |
sahilmgandhi | 18:6a4db94011d3 | 183 | for (loop = 0; loop < 8; loop++) |
sahilmgandhi | 18:6a4db94011d3 | 184 | { |
sahilmgandhi | 18:6a4db94011d3 | 185 | obj->i2c->CONTROLS = SCL; |
sahilmgandhi | 18:6a4db94011d3 | 186 | i2c_delay(SHIELD_TSU); |
sahilmgandhi | 18:6a4db94011d3 | 187 | if ((obj->i2c->CONTROL & SDA)) |
sahilmgandhi | 18:6a4db94011d3 | 188 | data_receive_byte += (1 << (7 - loop)); |
sahilmgandhi | 18:6a4db94011d3 | 189 | |
sahilmgandhi | 18:6a4db94011d3 | 190 | obj->i2c->CONTROLC = SCL; |
sahilmgandhi | 18:6a4db94011d3 | 191 | i2c_delay(SHIELD_TSU); |
sahilmgandhi | 18:6a4db94011d3 | 192 | } |
sahilmgandhi | 18:6a4db94011d3 | 193 | |
sahilmgandhi | 18:6a4db94011d3 | 194 | obj->i2c->CONTROLC = SDA; |
sahilmgandhi | 18:6a4db94011d3 | 195 | i2c_delay(SHIELD_TSU); |
sahilmgandhi | 18:6a4db94011d3 | 196 | break; |
sahilmgandhi | 18:6a4db94011d3 | 197 | } |
sahilmgandhi | 18:6a4db94011d3 | 198 | return data_receive_byte; |
sahilmgandhi | 18:6a4db94011d3 | 199 | } |
sahilmgandhi | 18:6a4db94011d3 | 200 | |
sahilmgandhi | 18:6a4db94011d3 | 201 | static inline int i2c_receive_ack(i2c_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 202 | { |
sahilmgandhi | 18:6a4db94011d3 | 203 | int nack; |
sahilmgandhi | 18:6a4db94011d3 | 204 | int delay_value; |
sahilmgandhi | 18:6a4db94011d3 | 205 | switch ((int)obj->i2c) { |
sahilmgandhi | 18:6a4db94011d3 | 206 | case I2C_0: delay_value = TSC_TSU; break; |
sahilmgandhi | 18:6a4db94011d3 | 207 | case I2C_1: delay_value = AAIC_TSU; break; |
sahilmgandhi | 18:6a4db94011d3 | 208 | case I2C_2: delay_value = SHIELD_TSU; break; |
sahilmgandhi | 18:6a4db94011d3 | 209 | case I2C_3: delay_value = SHIELD_TSU; break; |
sahilmgandhi | 18:6a4db94011d3 | 210 | } |
sahilmgandhi | 18:6a4db94011d3 | 211 | |
sahilmgandhi | 18:6a4db94011d3 | 212 | i2c_delay(delay_value); |
sahilmgandhi | 18:6a4db94011d3 | 213 | obj->i2c->CONTROLS = SDA; |
sahilmgandhi | 18:6a4db94011d3 | 214 | i2c_delay(delay_value); |
sahilmgandhi | 18:6a4db94011d3 | 215 | obj->i2c->CONTROLC = SCL; |
sahilmgandhi | 18:6a4db94011d3 | 216 | i2c_delay(delay_value); |
sahilmgandhi | 18:6a4db94011d3 | 217 | obj->i2c->CONTROLS = SCL; |
sahilmgandhi | 18:6a4db94011d3 | 218 | i2c_delay(delay_value); |
sahilmgandhi | 18:6a4db94011d3 | 219 | nack = obj->i2c->CONTROL & SDA; |
sahilmgandhi | 18:6a4db94011d3 | 220 | i2c_delay(delay_value); |
sahilmgandhi | 18:6a4db94011d3 | 221 | obj->i2c->CONTROLC = SCL; |
sahilmgandhi | 18:6a4db94011d3 | 222 | i2c_delay(delay_value); |
sahilmgandhi | 18:6a4db94011d3 | 223 | obj->i2c->CONTROLS = SDA; |
sahilmgandhi | 18:6a4db94011d3 | 224 | i2c_delay(delay_value); |
sahilmgandhi | 18:6a4db94011d3 | 225 | if(nack==0) |
sahilmgandhi | 18:6a4db94011d3 | 226 | return 1; |
sahilmgandhi | 18:6a4db94011d3 | 227 | |
sahilmgandhi | 18:6a4db94011d3 | 228 | return 0; |
sahilmgandhi | 18:6a4db94011d3 | 229 | } |
sahilmgandhi | 18:6a4db94011d3 | 230 | |
sahilmgandhi | 18:6a4db94011d3 | 231 | |
sahilmgandhi | 18:6a4db94011d3 | 232 | static inline void i2c_send_nack(i2c_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 233 | { |
sahilmgandhi | 18:6a4db94011d3 | 234 | int delay_value; |
sahilmgandhi | 18:6a4db94011d3 | 235 | switch ((int)obj->i2c) { |
sahilmgandhi | 18:6a4db94011d3 | 236 | case I2C_0: delay_value = TSC_TSU; break; |
sahilmgandhi | 18:6a4db94011d3 | 237 | case I2C_1: delay_value = AAIC_TSU; break; |
sahilmgandhi | 18:6a4db94011d3 | 238 | case I2C_2: delay_value = SHIELD_TSU; break; |
sahilmgandhi | 18:6a4db94011d3 | 239 | case I2C_3: delay_value = SHIELD_TSU; break; |
sahilmgandhi | 18:6a4db94011d3 | 240 | } |
sahilmgandhi | 18:6a4db94011d3 | 241 | |
sahilmgandhi | 18:6a4db94011d3 | 242 | i2c_delay(delay_value); |
sahilmgandhi | 18:6a4db94011d3 | 243 | obj->i2c->CONTROLC = SCL; |
sahilmgandhi | 18:6a4db94011d3 | 244 | i2c_delay(delay_value); |
sahilmgandhi | 18:6a4db94011d3 | 245 | obj->i2c->CONTROLS = SDA; |
sahilmgandhi | 18:6a4db94011d3 | 246 | i2c_delay(delay_value); |
sahilmgandhi | 18:6a4db94011d3 | 247 | obj->i2c->CONTROLS = SCL; |
sahilmgandhi | 18:6a4db94011d3 | 248 | i2c_delay(delay_value); |
sahilmgandhi | 18:6a4db94011d3 | 249 | obj->i2c->CONTROLC = SCL; |
sahilmgandhi | 18:6a4db94011d3 | 250 | i2c_delay(delay_value); |
sahilmgandhi | 18:6a4db94011d3 | 251 | obj->i2c->CONTROLC = SDA; |
sahilmgandhi | 18:6a4db94011d3 | 252 | i2c_delay(delay_value); |
sahilmgandhi | 18:6a4db94011d3 | 253 | |
sahilmgandhi | 18:6a4db94011d3 | 254 | } |
sahilmgandhi | 18:6a4db94011d3 | 255 | |
sahilmgandhi | 18:6a4db94011d3 | 256 | static inline void i2c_send_ack(i2c_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 257 | { |
sahilmgandhi | 18:6a4db94011d3 | 258 | int delay_value; |
sahilmgandhi | 18:6a4db94011d3 | 259 | switch ((int)obj->i2c) { |
sahilmgandhi | 18:6a4db94011d3 | 260 | case I2C_0: delay_value = TSC_TSU; break; |
sahilmgandhi | 18:6a4db94011d3 | 261 | case I2C_1: delay_value = AAIC_TSU; break; |
sahilmgandhi | 18:6a4db94011d3 | 262 | case I2C_2: delay_value = SHIELD_TSU; break; |
sahilmgandhi | 18:6a4db94011d3 | 263 | case I2C_3: delay_value = SHIELD_TSU; break; |
sahilmgandhi | 18:6a4db94011d3 | 264 | } |
sahilmgandhi | 18:6a4db94011d3 | 265 | |
sahilmgandhi | 18:6a4db94011d3 | 266 | i2c_delay(delay_value); |
sahilmgandhi | 18:6a4db94011d3 | 267 | obj->i2c->CONTROLC = SDA; |
sahilmgandhi | 18:6a4db94011d3 | 268 | i2c_delay(delay_value); |
sahilmgandhi | 18:6a4db94011d3 | 269 | obj->i2c->CONTROLS = SCL; |
sahilmgandhi | 18:6a4db94011d3 | 270 | i2c_delay(delay_value); |
sahilmgandhi | 18:6a4db94011d3 | 271 | obj->i2c->CONTROLC = SCL; |
sahilmgandhi | 18:6a4db94011d3 | 272 | i2c_delay(delay_value); |
sahilmgandhi | 18:6a4db94011d3 | 273 | |
sahilmgandhi | 18:6a4db94011d3 | 274 | } |
sahilmgandhi | 18:6a4db94011d3 | 275 | |
sahilmgandhi | 18:6a4db94011d3 | 276 | void i2c_init(i2c_t *obj, PinName sda, PinName scl) |
sahilmgandhi | 18:6a4db94011d3 | 277 | { |
sahilmgandhi | 18:6a4db94011d3 | 278 | // determine the SPI to use |
sahilmgandhi | 18:6a4db94011d3 | 279 | I2CName i2c_sda = (I2CName)pinmap_peripheral(sda, PinMap_I2C_SDA); |
sahilmgandhi | 18:6a4db94011d3 | 280 | I2CName i2c_scl = (I2CName)pinmap_peripheral(scl, PinMap_I2C_SCL); |
sahilmgandhi | 18:6a4db94011d3 | 281 | obj->i2c = (MPS2_I2C_TypeDef *)pinmap_merge(i2c_sda, i2c_scl); |
sahilmgandhi | 18:6a4db94011d3 | 282 | |
sahilmgandhi | 18:6a4db94011d3 | 283 | if ((int)obj->i2c == NC) { |
sahilmgandhi | 18:6a4db94011d3 | 284 | error("I2C pin mapping failed"); |
sahilmgandhi | 18:6a4db94011d3 | 285 | } |
sahilmgandhi | 18:6a4db94011d3 | 286 | |
sahilmgandhi | 18:6a4db94011d3 | 287 | pinmap_pinout(sda, PinMap_I2C_SDA); |
sahilmgandhi | 18:6a4db94011d3 | 288 | pinmap_pinout(scl, PinMap_I2C_SCL); |
sahilmgandhi | 18:6a4db94011d3 | 289 | |
sahilmgandhi | 18:6a4db94011d3 | 290 | switch ((int)obj->i2c) { |
sahilmgandhi | 18:6a4db94011d3 | 291 | case I2C_2: CMSDK_GPIO0->ALTFUNCSET |= 0xC000; break; |
sahilmgandhi | 18:6a4db94011d3 | 292 | case I2C_3: CMSDK_GPIO1->ALTFUNCSET |= 0x00C0; break; |
sahilmgandhi | 18:6a4db94011d3 | 293 | } |
sahilmgandhi | 18:6a4db94011d3 | 294 | |
sahilmgandhi | 18:6a4db94011d3 | 295 | |
sahilmgandhi | 18:6a4db94011d3 | 296 | } |
sahilmgandhi | 18:6a4db94011d3 | 297 | |
sahilmgandhi | 18:6a4db94011d3 | 298 | int i2c_start(i2c_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 299 | { |
sahilmgandhi | 18:6a4db94011d3 | 300 | int delay_value; |
sahilmgandhi | 18:6a4db94011d3 | 301 | switch ((int)obj->i2c) { |
sahilmgandhi | 18:6a4db94011d3 | 302 | case I2C_0: delay_value = TSC_TSU; break; |
sahilmgandhi | 18:6a4db94011d3 | 303 | case I2C_1: delay_value = AAIC_TSU; break; |
sahilmgandhi | 18:6a4db94011d3 | 304 | case I2C_2: delay_value = SHIELD_TSU; break; |
sahilmgandhi | 18:6a4db94011d3 | 305 | case I2C_3: delay_value = SHIELD_TSU; break; |
sahilmgandhi | 18:6a4db94011d3 | 306 | } |
sahilmgandhi | 18:6a4db94011d3 | 307 | |
sahilmgandhi | 18:6a4db94011d3 | 308 | i2c_delay(delay_value); |
sahilmgandhi | 18:6a4db94011d3 | 309 | obj->i2c->CONTROLS = SDA | SCL; |
sahilmgandhi | 18:6a4db94011d3 | 310 | i2c_delay(delay_value); |
sahilmgandhi | 18:6a4db94011d3 | 311 | obj->i2c->CONTROLC = SDA; |
sahilmgandhi | 18:6a4db94011d3 | 312 | i2c_delay(delay_value); |
sahilmgandhi | 18:6a4db94011d3 | 313 | |
sahilmgandhi | 18:6a4db94011d3 | 314 | return 0; |
sahilmgandhi | 18:6a4db94011d3 | 315 | } |
sahilmgandhi | 18:6a4db94011d3 | 316 | |
sahilmgandhi | 18:6a4db94011d3 | 317 | int i2c_start_tsc(i2c_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 318 | { |
sahilmgandhi | 18:6a4db94011d3 | 319 | int delay_value; |
sahilmgandhi | 18:6a4db94011d3 | 320 | switch ((int)obj->i2c) { |
sahilmgandhi | 18:6a4db94011d3 | 321 | case I2C_0: delay_value = TSC_TSU; break; |
sahilmgandhi | 18:6a4db94011d3 | 322 | case I2C_1: delay_value = AAIC_TSU; break; |
sahilmgandhi | 18:6a4db94011d3 | 323 | case I2C_2: delay_value = SHIELD_TSU; break; |
sahilmgandhi | 18:6a4db94011d3 | 324 | case I2C_3: delay_value = SHIELD_TSU; break; |
sahilmgandhi | 18:6a4db94011d3 | 325 | } |
sahilmgandhi | 18:6a4db94011d3 | 326 | |
sahilmgandhi | 18:6a4db94011d3 | 327 | i2c_delay(delay_value); |
sahilmgandhi | 18:6a4db94011d3 | 328 | obj->i2c->CONTROLC = SDA; |
sahilmgandhi | 18:6a4db94011d3 | 329 | i2c_delay(delay_value); |
sahilmgandhi | 18:6a4db94011d3 | 330 | obj->i2c->CONTROLC = SCL; |
sahilmgandhi | 18:6a4db94011d3 | 331 | i2c_delay(delay_value); |
sahilmgandhi | 18:6a4db94011d3 | 332 | |
sahilmgandhi | 18:6a4db94011d3 | 333 | return 0; |
sahilmgandhi | 18:6a4db94011d3 | 334 | } |
sahilmgandhi | 18:6a4db94011d3 | 335 | |
sahilmgandhi | 18:6a4db94011d3 | 336 | int i2c_stop(i2c_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 337 | { |
sahilmgandhi | 18:6a4db94011d3 | 338 | int delay_value; |
sahilmgandhi | 18:6a4db94011d3 | 339 | switch ((int)obj->i2c) { |
sahilmgandhi | 18:6a4db94011d3 | 340 | case I2C_0: delay_value = TSC_TSU; break; |
sahilmgandhi | 18:6a4db94011d3 | 341 | case I2C_1: delay_value = AAIC_TSU; break; |
sahilmgandhi | 18:6a4db94011d3 | 342 | case I2C_2: delay_value = SHIELD_TSU; break; |
sahilmgandhi | 18:6a4db94011d3 | 343 | case I2C_3: delay_value = SHIELD_TSU; break; |
sahilmgandhi | 18:6a4db94011d3 | 344 | } |
sahilmgandhi | 18:6a4db94011d3 | 345 | // Actual stop bit |
sahilmgandhi | 18:6a4db94011d3 | 346 | i2c_delay(delay_value); |
sahilmgandhi | 18:6a4db94011d3 | 347 | obj->i2c->CONTROLC = SDA; |
sahilmgandhi | 18:6a4db94011d3 | 348 | i2c_delay(delay_value); |
sahilmgandhi | 18:6a4db94011d3 | 349 | obj->i2c->CONTROLS = SCL; |
sahilmgandhi | 18:6a4db94011d3 | 350 | i2c_delay(delay_value); |
sahilmgandhi | 18:6a4db94011d3 | 351 | obj->i2c->CONTROLS = SDA; |
sahilmgandhi | 18:6a4db94011d3 | 352 | i2c_delay(delay_value); |
sahilmgandhi | 18:6a4db94011d3 | 353 | |
sahilmgandhi | 18:6a4db94011d3 | 354 | return 0; |
sahilmgandhi | 18:6a4db94011d3 | 355 | } |
sahilmgandhi | 18:6a4db94011d3 | 356 | |
sahilmgandhi | 18:6a4db94011d3 | 357 | |
sahilmgandhi | 18:6a4db94011d3 | 358 | |
sahilmgandhi | 18:6a4db94011d3 | 359 | void i2c_frequency(i2c_t *obj, int hz) { |
sahilmgandhi | 18:6a4db94011d3 | 360 | } |
sahilmgandhi | 18:6a4db94011d3 | 361 | |
sahilmgandhi | 18:6a4db94011d3 | 362 | int i2c_read(i2c_t *obj, int address, char *data, int length, int stop) |
sahilmgandhi | 18:6a4db94011d3 | 363 | { |
sahilmgandhi | 18:6a4db94011d3 | 364 | unsigned int loop, rxdata; |
sahilmgandhi | 18:6a4db94011d3 | 365 | int sadr, ack, bytes_read; |
sahilmgandhi | 18:6a4db94011d3 | 366 | rxdata=0; |
sahilmgandhi | 18:6a4db94011d3 | 367 | switch ((int)obj->i2c) { |
sahilmgandhi | 18:6a4db94011d3 | 368 | case I2C_0: |
sahilmgandhi | 18:6a4db94011d3 | 369 | sadr = TSC_I2C_ADDR; |
sahilmgandhi | 18:6a4db94011d3 | 370 | break; |
sahilmgandhi | 18:6a4db94011d3 | 371 | case I2C_1: |
sahilmgandhi | 18:6a4db94011d3 | 372 | sadr = AAIC_I2C_ADDR; |
sahilmgandhi | 18:6a4db94011d3 | 373 | break; |
sahilmgandhi | 18:6a4db94011d3 | 374 | case I2C_2: |
sahilmgandhi | 18:6a4db94011d3 | 375 | case I2C_3: |
sahilmgandhi | 18:6a4db94011d3 | 376 | sadr = address; //LM75_I2C_ADDR; or MMA7660_I2C_ADDR; |
sahilmgandhi | 18:6a4db94011d3 | 377 | break; |
sahilmgandhi | 18:6a4db94011d3 | 378 | } |
sahilmgandhi | 18:6a4db94011d3 | 379 | bytes_read = 0; |
sahilmgandhi | 18:6a4db94011d3 | 380 | // Start bit |
sahilmgandhi | 18:6a4db94011d3 | 381 | i2c_start(obj); |
sahilmgandhi | 18:6a4db94011d3 | 382 | |
sahilmgandhi | 18:6a4db94011d3 | 383 | switch ((int)obj->i2c) { |
sahilmgandhi | 18:6a4db94011d3 | 384 | case I2C_0: |
sahilmgandhi | 18:6a4db94011d3 | 385 | // Set serial and register address |
sahilmgandhi | 18:6a4db94011d3 | 386 | i2c_send_byte(obj,sadr); |
sahilmgandhi | 18:6a4db94011d3 | 387 | ack += i2c_receive_ack(obj); |
sahilmgandhi | 18:6a4db94011d3 | 388 | i2c_send_byte(obj, address); |
sahilmgandhi | 18:6a4db94011d3 | 389 | ack += i2c_receive_ack(obj); |
sahilmgandhi | 18:6a4db94011d3 | 390 | |
sahilmgandhi | 18:6a4db94011d3 | 391 | // Stop bit |
sahilmgandhi | 18:6a4db94011d3 | 392 | i2c_stop(obj); |
sahilmgandhi | 18:6a4db94011d3 | 393 | |
sahilmgandhi | 18:6a4db94011d3 | 394 | // Start bit |
sahilmgandhi | 18:6a4db94011d3 | 395 | i2c_start_tsc(obj); |
sahilmgandhi | 18:6a4db94011d3 | 396 | |
sahilmgandhi | 18:6a4db94011d3 | 397 | // Read from I2C address |
sahilmgandhi | 18:6a4db94011d3 | 398 | i2c_send_byte(obj,sadr | 1); |
sahilmgandhi | 18:6a4db94011d3 | 399 | ack += i2c_receive_ack(obj); |
sahilmgandhi | 18:6a4db94011d3 | 400 | |
sahilmgandhi | 18:6a4db94011d3 | 401 | rxdata = (i2c_receive_byte(obj) & 0xFF); |
sahilmgandhi | 18:6a4db94011d3 | 402 | data[((length-1)-bytes_read)] = (char)rxdata; |
sahilmgandhi | 18:6a4db94011d3 | 403 | bytes_read++; |
sahilmgandhi | 18:6a4db94011d3 | 404 | // Read multiple bytes |
sahilmgandhi | 18:6a4db94011d3 | 405 | if ((length > 1) && (length < 5)) |
sahilmgandhi | 18:6a4db94011d3 | 406 | { |
sahilmgandhi | 18:6a4db94011d3 | 407 | for (loop = 1; loop <= (length - 1); loop++) |
sahilmgandhi | 18:6a4db94011d3 | 408 | { |
sahilmgandhi | 18:6a4db94011d3 | 409 | // Send ACK |
sahilmgandhi | 18:6a4db94011d3 | 410 | i2c_send_ack(obj); |
sahilmgandhi | 18:6a4db94011d3 | 411 | |
sahilmgandhi | 18:6a4db94011d3 | 412 | // Next byte |
sahilmgandhi | 18:6a4db94011d3 | 413 | //rxdata = ((rxdata << 8) & 0xFFFFFF00); |
sahilmgandhi | 18:6a4db94011d3 | 414 | //rxdata |= (i2c_receive_byte(obj) & 0xFF); |
sahilmgandhi | 18:6a4db94011d3 | 415 | rxdata = i2c_receive_byte(obj); |
sahilmgandhi | 18:6a4db94011d3 | 416 | data[(length-1)-bytes_read] = (char)rxdata; |
sahilmgandhi | 18:6a4db94011d3 | 417 | bytes_read++; |
sahilmgandhi | 18:6a4db94011d3 | 418 | |
sahilmgandhi | 18:6a4db94011d3 | 419 | } |
sahilmgandhi | 18:6a4db94011d3 | 420 | } |
sahilmgandhi | 18:6a4db94011d3 | 421 | break; |
sahilmgandhi | 18:6a4db94011d3 | 422 | case I2C_1: |
sahilmgandhi | 18:6a4db94011d3 | 423 | // Set serial and register address |
sahilmgandhi | 18:6a4db94011d3 | 424 | i2c_send_byte(obj,sadr); |
sahilmgandhi | 18:6a4db94011d3 | 425 | ack += i2c_receive_ack(obj); |
sahilmgandhi | 18:6a4db94011d3 | 426 | i2c_send_byte(obj, address); |
sahilmgandhi | 18:6a4db94011d3 | 427 | ack += i2c_receive_ack(obj); |
sahilmgandhi | 18:6a4db94011d3 | 428 | |
sahilmgandhi | 18:6a4db94011d3 | 429 | // Stop bit |
sahilmgandhi | 18:6a4db94011d3 | 430 | i2c_stop(obj); |
sahilmgandhi | 18:6a4db94011d3 | 431 | |
sahilmgandhi | 18:6a4db94011d3 | 432 | // Start bit |
sahilmgandhi | 18:6a4db94011d3 | 433 | i2c_start_tsc(obj); |
sahilmgandhi | 18:6a4db94011d3 | 434 | // Fall through to read data |
sahilmgandhi | 18:6a4db94011d3 | 435 | case I2C_2: |
sahilmgandhi | 18:6a4db94011d3 | 436 | case I2C_3: |
sahilmgandhi | 18:6a4db94011d3 | 437 | // Read from preset register address pointer |
sahilmgandhi | 18:6a4db94011d3 | 438 | i2c_send_byte(obj,sadr | 1); |
sahilmgandhi | 18:6a4db94011d3 | 439 | ack += i2c_receive_ack(obj); |
sahilmgandhi | 18:6a4db94011d3 | 440 | |
sahilmgandhi | 18:6a4db94011d3 | 441 | rxdata = i2c_receive_byte(obj); |
sahilmgandhi | 18:6a4db94011d3 | 442 | data[bytes_read] = (char)rxdata; |
sahilmgandhi | 18:6a4db94011d3 | 443 | bytes_read++; |
sahilmgandhi | 18:6a4db94011d3 | 444 | // Read multiple bytes |
sahilmgandhi | 18:6a4db94011d3 | 445 | if ((length > 1) && (length < 5)) |
sahilmgandhi | 18:6a4db94011d3 | 446 | { |
sahilmgandhi | 18:6a4db94011d3 | 447 | for (loop = 1; loop <= (length - 1); loop++) |
sahilmgandhi | 18:6a4db94011d3 | 448 | { |
sahilmgandhi | 18:6a4db94011d3 | 449 | // Send ACK |
sahilmgandhi | 18:6a4db94011d3 | 450 | i2c_send_ack(obj); |
sahilmgandhi | 18:6a4db94011d3 | 451 | |
sahilmgandhi | 18:6a4db94011d3 | 452 | // Next byte |
sahilmgandhi | 18:6a4db94011d3 | 453 | rxdata = i2c_receive_byte(obj); |
sahilmgandhi | 18:6a4db94011d3 | 454 | data[loop] = (char)rxdata; |
sahilmgandhi | 18:6a4db94011d3 | 455 | bytes_read++; |
sahilmgandhi | 18:6a4db94011d3 | 456 | |
sahilmgandhi | 18:6a4db94011d3 | 457 | } |
sahilmgandhi | 18:6a4db94011d3 | 458 | } |
sahilmgandhi | 18:6a4db94011d3 | 459 | break; |
sahilmgandhi | 18:6a4db94011d3 | 460 | } |
sahilmgandhi | 18:6a4db94011d3 | 461 | i2c_send_nack(obj); |
sahilmgandhi | 18:6a4db94011d3 | 462 | |
sahilmgandhi | 18:6a4db94011d3 | 463 | i2c_stop(obj); // Actual stop bit |
sahilmgandhi | 18:6a4db94011d3 | 464 | |
sahilmgandhi | 18:6a4db94011d3 | 465 | return bytes_read; |
sahilmgandhi | 18:6a4db94011d3 | 466 | } |
sahilmgandhi | 18:6a4db94011d3 | 467 | |
sahilmgandhi | 18:6a4db94011d3 | 468 | int i2c_write(i2c_t *obj, int address, const char *data, int length, int stop) |
sahilmgandhi | 18:6a4db94011d3 | 469 | { |
sahilmgandhi | 18:6a4db94011d3 | 470 | int ack=0; |
sahilmgandhi | 18:6a4db94011d3 | 471 | int sadr; |
sahilmgandhi | 18:6a4db94011d3 | 472 | char * ptr; |
sahilmgandhi | 18:6a4db94011d3 | 473 | char addr; |
sahilmgandhi | 18:6a4db94011d3 | 474 | ptr = (char*)data; |
sahilmgandhi | 18:6a4db94011d3 | 475 | switch ((int)obj->i2c) |
sahilmgandhi | 18:6a4db94011d3 | 476 | { |
sahilmgandhi | 18:6a4db94011d3 | 477 | case I2C_0: |
sahilmgandhi | 18:6a4db94011d3 | 478 | sadr = TSC_I2C_ADDR; |
sahilmgandhi | 18:6a4db94011d3 | 479 | addr = address; |
sahilmgandhi | 18:6a4db94011d3 | 480 | break; |
sahilmgandhi | 18:6a4db94011d3 | 481 | case I2C_1: |
sahilmgandhi | 18:6a4db94011d3 | 482 | sadr = AAIC_I2C_ADDR; |
sahilmgandhi | 18:6a4db94011d3 | 483 | addr = address; |
sahilmgandhi | 18:6a4db94011d3 | 484 | break; |
sahilmgandhi | 18:6a4db94011d3 | 485 | case I2C_2: |
sahilmgandhi | 18:6a4db94011d3 | 486 | case I2C_3: |
sahilmgandhi | 18:6a4db94011d3 | 487 | sadr = address; //LM75_I2C_ADDR or MMA7660_I2C_ADDR; |
sahilmgandhi | 18:6a4db94011d3 | 488 | addr = *ptr++; |
sahilmgandhi | 18:6a4db94011d3 | 489 | break; |
sahilmgandhi | 18:6a4db94011d3 | 490 | } |
sahilmgandhi | 18:6a4db94011d3 | 491 | |
sahilmgandhi | 18:6a4db94011d3 | 492 | // printf("adr = %x, reg = %x\n",sadr, address); |
sahilmgandhi | 18:6a4db94011d3 | 493 | i2c_start(obj); |
sahilmgandhi | 18:6a4db94011d3 | 494 | |
sahilmgandhi | 18:6a4db94011d3 | 495 | // Set serial and register address |
sahilmgandhi | 18:6a4db94011d3 | 496 | i2c_send_byte(obj,sadr); |
sahilmgandhi | 18:6a4db94011d3 | 497 | ack += i2c_receive_ack(obj); |
sahilmgandhi | 18:6a4db94011d3 | 498 | i2c_send_byte(obj, addr); |
sahilmgandhi | 18:6a4db94011d3 | 499 | ack += i2c_receive_ack(obj); |
sahilmgandhi | 18:6a4db94011d3 | 500 | |
sahilmgandhi | 18:6a4db94011d3 | 501 | for(int i = 1; i<length; i++) |
sahilmgandhi | 18:6a4db94011d3 | 502 | { |
sahilmgandhi | 18:6a4db94011d3 | 503 | i2c_send_byte(obj, *ptr++); |
sahilmgandhi | 18:6a4db94011d3 | 504 | ack += i2c_receive_ack(obj); |
sahilmgandhi | 18:6a4db94011d3 | 505 | } |
sahilmgandhi | 18:6a4db94011d3 | 506 | |
sahilmgandhi | 18:6a4db94011d3 | 507 | i2c_stop(obj); |
sahilmgandhi | 18:6a4db94011d3 | 508 | if(ack==3) { return 1; } |
sahilmgandhi | 18:6a4db94011d3 | 509 | else{ return 0; } |
sahilmgandhi | 18:6a4db94011d3 | 510 | |
sahilmgandhi | 18:6a4db94011d3 | 511 | } |
sahilmgandhi | 18:6a4db94011d3 | 512 | |
sahilmgandhi | 18:6a4db94011d3 | 513 | void i2c_reset(i2c_t *obj) { |
sahilmgandhi | 18:6a4db94011d3 | 514 | i2c_stop(obj); |
sahilmgandhi | 18:6a4db94011d3 | 515 | } |
sahilmgandhi | 18:6a4db94011d3 | 516 | |
sahilmgandhi | 18:6a4db94011d3 | 517 | int i2c_byte_read(i2c_t *obj, int last) { |
sahilmgandhi | 18:6a4db94011d3 | 518 | return 0; |
sahilmgandhi | 18:6a4db94011d3 | 519 | } |
sahilmgandhi | 18:6a4db94011d3 | 520 | |
sahilmgandhi | 18:6a4db94011d3 | 521 | int i2c_byte_write(i2c_t *obj, int data) { |
sahilmgandhi | 18:6a4db94011d3 | 522 | return 0; |
sahilmgandhi | 18:6a4db94011d3 | 523 | } |