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targets/hal/TARGET_ARM_SSG/TARGET_MPS2/i2c_api.c@0:9b334a45a8ff, 2015-10-01 (annotated)
- Committer:
- bogdanm
- Date:
- Thu Oct 01 15:25:22 2015 +0300
- Revision:
- 0:9b334a45a8ff
- Child:
- 80:bdf1132a57cf
Initial commit on mbed-dev
Replaces mbed-src (now inactive)
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
bogdanm | 0:9b334a45a8ff | 1 | /* mbed Microcontroller Library |
bogdanm | 0:9b334a45a8ff | 2 | * Copyright (c) 2006-2015 ARM Limited |
bogdanm | 0:9b334a45a8ff | 3 | * |
bogdanm | 0:9b334a45a8ff | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
bogdanm | 0:9b334a45a8ff | 5 | * you may not use this file except in compliance with the License. |
bogdanm | 0:9b334a45a8ff | 6 | * You may obtain a copy of the License at |
bogdanm | 0:9b334a45a8ff | 7 | * |
bogdanm | 0:9b334a45a8ff | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
bogdanm | 0:9b334a45a8ff | 9 | * |
bogdanm | 0:9b334a45a8ff | 10 | * Unless required by applicable law or agreed to in writing, software |
bogdanm | 0:9b334a45a8ff | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
bogdanm | 0:9b334a45a8ff | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
bogdanm | 0:9b334a45a8ff | 13 | * See the License for the specific language governing permissions and |
bogdanm | 0:9b334a45a8ff | 14 | * limitations under the License. |
bogdanm | 0:9b334a45a8ff | 15 | */ |
bogdanm | 0:9b334a45a8ff | 16 | #include "i2c_api.h" |
bogdanm | 0:9b334a45a8ff | 17 | #include "cmsis.h" |
bogdanm | 0:9b334a45a8ff | 18 | #include "pinmap.h" |
bogdanm | 0:9b334a45a8ff | 19 | #include "mbed_error.h" |
bogdanm | 0:9b334a45a8ff | 20 | #include "SMM_MPS2.h" |
bogdanm | 0:9b334a45a8ff | 21 | #include "wait_api.h" |
bogdanm | 0:9b334a45a8ff | 22 | #include "fpga.h" |
bogdanm | 0:9b334a45a8ff | 23 | |
bogdanm | 0:9b334a45a8ff | 24 | // Types |
bogdanm | 0:9b334a45a8ff | 25 | #undef FALSE |
bogdanm | 0:9b334a45a8ff | 26 | #undef TRUE |
bogdanm | 0:9b334a45a8ff | 27 | #define FALSE 0 |
bogdanm | 0:9b334a45a8ff | 28 | #define TRUE 1 |
bogdanm | 0:9b334a45a8ff | 29 | |
bogdanm | 0:9b334a45a8ff | 30 | // TSC I2C controller |
bogdanm | 0:9b334a45a8ff | 31 | #define TSC_I2C_ADDR 0x82 |
bogdanm | 0:9b334a45a8ff | 32 | // AACI I2C controller I2C address |
bogdanm | 0:9b334a45a8ff | 33 | #define AAIC_I2C_ADDR 0x96 |
bogdanm | 0:9b334a45a8ff | 34 | |
bogdanm | 0:9b334a45a8ff | 35 | #define TSC_I2C_CID 0x0811 |
bogdanm | 0:9b334a45a8ff | 36 | |
bogdanm | 0:9b334a45a8ff | 37 | // TSC I2C controller registers |
bogdanm | 0:9b334a45a8ff | 38 | #define TSC_I2C_CRID 0x00 |
bogdanm | 0:9b334a45a8ff | 39 | |
bogdanm | 0:9b334a45a8ff | 40 | |
bogdanm | 0:9b334a45a8ff | 41 | // TSSPCPSR Clock prescale register |
bogdanm | 0:9b334a45a8ff | 42 | #define TSSPCPSR_DFLT 0x0002 // Clock prescale (use with SCR) |
bogdanm | 0:9b334a45a8ff | 43 | |
bogdanm | 0:9b334a45a8ff | 44 | // TSC defaults |
bogdanm | 0:9b334a45a8ff | 45 | #define TSC_XOFF 20 // X offset |
bogdanm | 0:9b334a45a8ff | 46 | #define TSC_YOFF 20 // Y offset |
bogdanm | 0:9b334a45a8ff | 47 | #define TSC_MAXVAL 37000 // 0x0FFF * 10 with TSC to LCD scaling |
bogdanm | 0:9b334a45a8ff | 48 | |
bogdanm | 0:9b334a45a8ff | 49 | #define TSC_TSU 15 // Setup delay 600nS min |
bogdanm | 0:9b334a45a8ff | 50 | #define AAIC_TSU 25 // Setup delay 1000nS min |
bogdanm | 0:9b334a45a8ff | 51 | |
bogdanm | 0:9b334a45a8ff | 52 | |
bogdanm | 0:9b334a45a8ff | 53 | static const PinMap PinMap_I2C_SDA[] = { |
bogdanm | 0:9b334a45a8ff | 54 | {TSC_SDA, I2C_0, 0}, |
bogdanm | 0:9b334a45a8ff | 55 | {AUD_SDA, I2C_1, 0}, |
bogdanm | 0:9b334a45a8ff | 56 | // {EXP_SDA, I2C_2, 0}, //only used in extended version |
bogdanm | 0:9b334a45a8ff | 57 | {NC , NC , 0} |
bogdanm | 0:9b334a45a8ff | 58 | }; |
bogdanm | 0:9b334a45a8ff | 59 | |
bogdanm | 0:9b334a45a8ff | 60 | static const PinMap PinMap_I2C_SCL[] = { |
bogdanm | 0:9b334a45a8ff | 61 | {TSC_SCL, I2C_0, 0}, |
bogdanm | 0:9b334a45a8ff | 62 | {AUD_SCL, I2C_1, 0}, |
bogdanm | 0:9b334a45a8ff | 63 | // {EXP_SCL, I2C_2, 0}, //only used in extended version |
bogdanm | 0:9b334a45a8ff | 64 | {NC , NC, 0} |
bogdanm | 0:9b334a45a8ff | 65 | }; |
bogdanm | 0:9b334a45a8ff | 66 | |
bogdanm | 0:9b334a45a8ff | 67 | static inline void i2c_send_byte(i2c_t *obj, unsigned char c) |
bogdanm | 0:9b334a45a8ff | 68 | { |
bogdanm | 0:9b334a45a8ff | 69 | int loop; |
bogdanm | 0:9b334a45a8ff | 70 | switch ((int)obj->i2c) { |
bogdanm | 0:9b334a45a8ff | 71 | case I2C_0: |
bogdanm | 0:9b334a45a8ff | 72 | obj->i2c->CONTROLC = SCL; |
bogdanm | 0:9b334a45a8ff | 73 | i2c_delay(TSC_TSU); |
bogdanm | 0:9b334a45a8ff | 74 | |
bogdanm | 0:9b334a45a8ff | 75 | for (loop = 0; loop < 8; loop++) |
bogdanm | 0:9b334a45a8ff | 76 | { |
bogdanm | 0:9b334a45a8ff | 77 | if (c & (1 << (7 - loop))) |
bogdanm | 0:9b334a45a8ff | 78 | obj->i2c->CONTROLS = SDA; |
bogdanm | 0:9b334a45a8ff | 79 | else |
bogdanm | 0:9b334a45a8ff | 80 | obj->i2c->CONTROLC = SDA; |
bogdanm | 0:9b334a45a8ff | 81 | i2c_delay(TSC_TSU); |
bogdanm | 0:9b334a45a8ff | 82 | obj->i2c->CONTROLS = SCL; |
bogdanm | 0:9b334a45a8ff | 83 | i2c_delay(TSC_TSU); |
bogdanm | 0:9b334a45a8ff | 84 | obj->i2c->CONTROLC = SCL; |
bogdanm | 0:9b334a45a8ff | 85 | i2c_delay(TSC_TSU); |
bogdanm | 0:9b334a45a8ff | 86 | } |
bogdanm | 0:9b334a45a8ff | 87 | |
bogdanm | 0:9b334a45a8ff | 88 | obj->i2c->CONTROLS = SDA; |
bogdanm | 0:9b334a45a8ff | 89 | i2c_delay(TSC_TSU); |
bogdanm | 0:9b334a45a8ff | 90 | break; |
bogdanm | 0:9b334a45a8ff | 91 | case I2C_1: |
bogdanm | 0:9b334a45a8ff | 92 | for (loop = 0; loop < 8; loop++) { |
bogdanm | 0:9b334a45a8ff | 93 | i2c_delay(AAIC_TSU); |
bogdanm | 0:9b334a45a8ff | 94 | obj->i2c->CONTROLC = SCL; |
bogdanm | 0:9b334a45a8ff | 95 | i2c_delay(AAIC_TSU); |
bogdanm | 0:9b334a45a8ff | 96 | if (c & (1 << (7 - loop))) |
bogdanm | 0:9b334a45a8ff | 97 | obj->i2c->CONTROLS = SDA; |
bogdanm | 0:9b334a45a8ff | 98 | else |
bogdanm | 0:9b334a45a8ff | 99 | obj->i2c->CONTROLC = SDA; |
bogdanm | 0:9b334a45a8ff | 100 | i2c_delay(AAIC_TSU); |
bogdanm | 0:9b334a45a8ff | 101 | obj->i2c->CONTROLS = SCL; |
bogdanm | 0:9b334a45a8ff | 102 | i2c_delay(AAIC_TSU); |
bogdanm | 0:9b334a45a8ff | 103 | obj->i2c->CONTROLC = SCL; |
bogdanm | 0:9b334a45a8ff | 104 | } |
bogdanm | 0:9b334a45a8ff | 105 | |
bogdanm | 0:9b334a45a8ff | 106 | i2c_delay(AAIC_TSU); |
bogdanm | 0:9b334a45a8ff | 107 | obj->i2c->CONTROLS = SDA; |
bogdanm | 0:9b334a45a8ff | 108 | i2c_delay(AAIC_TSU); |
bogdanm | 0:9b334a45a8ff | 109 | break; |
bogdanm | 0:9b334a45a8ff | 110 | } |
bogdanm | 0:9b334a45a8ff | 111 | } |
bogdanm | 0:9b334a45a8ff | 112 | |
bogdanm | 0:9b334a45a8ff | 113 | static inline unsigned char i2c_receive_byte(i2c_t *obj) |
bogdanm | 0:9b334a45a8ff | 114 | { |
bogdanm | 0:9b334a45a8ff | 115 | int data_receive_byte, loop; |
bogdanm | 0:9b334a45a8ff | 116 | switch ((int)obj->i2c) { |
bogdanm | 0:9b334a45a8ff | 117 | case I2C_0: |
bogdanm | 0:9b334a45a8ff | 118 | obj->i2c->CONTROLS = SDA; |
bogdanm | 0:9b334a45a8ff | 119 | i2c_delay(TSC_TSU); |
bogdanm | 0:9b334a45a8ff | 120 | |
bogdanm | 0:9b334a45a8ff | 121 | data_receive_byte = 0; |
bogdanm | 0:9b334a45a8ff | 122 | |
bogdanm | 0:9b334a45a8ff | 123 | for (loop = 0; loop < 8; loop++) |
bogdanm | 0:9b334a45a8ff | 124 | { |
bogdanm | 0:9b334a45a8ff | 125 | obj->i2c->CONTROLS = SCL; |
bogdanm | 0:9b334a45a8ff | 126 | i2c_delay(TSC_TSU); |
bogdanm | 0:9b334a45a8ff | 127 | if ((obj->i2c->CONTROL & SDA)) |
bogdanm | 0:9b334a45a8ff | 128 | data_receive_byte += (1 << (7 - loop)); |
bogdanm | 0:9b334a45a8ff | 129 | obj->i2c->CONTROLC = SCL; |
bogdanm | 0:9b334a45a8ff | 130 | i2c_delay(TSC_TSU); |
bogdanm | 0:9b334a45a8ff | 131 | } |
bogdanm | 0:9b334a45a8ff | 132 | |
bogdanm | 0:9b334a45a8ff | 133 | obj->i2c->CONTROLC = SDA; |
bogdanm | 0:9b334a45a8ff | 134 | i2c_delay(TSC_TSU); |
bogdanm | 0:9b334a45a8ff | 135 | break; |
bogdanm | 0:9b334a45a8ff | 136 | case I2C_1: |
bogdanm | 0:9b334a45a8ff | 137 | obj->i2c->CONTROLS = SDA; |
bogdanm | 0:9b334a45a8ff | 138 | data_receive_byte = 0; |
bogdanm | 0:9b334a45a8ff | 139 | |
bogdanm | 0:9b334a45a8ff | 140 | for (loop = 0; loop < 8; loop++) { |
bogdanm | 0:9b334a45a8ff | 141 | i2c_delay(AAIC_TSU); |
bogdanm | 0:9b334a45a8ff | 142 | obj->i2c->CONTROLC = SCL; |
bogdanm | 0:9b334a45a8ff | 143 | i2c_delay(AAIC_TSU); |
bogdanm | 0:9b334a45a8ff | 144 | obj->i2c->CONTROLS = SCL | SDA; |
bogdanm | 0:9b334a45a8ff | 145 | i2c_delay(AAIC_TSU); |
bogdanm | 0:9b334a45a8ff | 146 | if ((obj->i2c->CONTROL & SDA)) |
bogdanm | 0:9b334a45a8ff | 147 | data_receive_byte += (1 << (7 - loop)); |
bogdanm | 0:9b334a45a8ff | 148 | i2c_delay(AAIC_TSU); |
bogdanm | 0:9b334a45a8ff | 149 | obj->i2c->CONTROLC = SCL; |
bogdanm | 0:9b334a45a8ff | 150 | } |
bogdanm | 0:9b334a45a8ff | 151 | |
bogdanm | 0:9b334a45a8ff | 152 | i2c_delay(AAIC_TSU); |
bogdanm | 0:9b334a45a8ff | 153 | obj->i2c->CONTROLC = SDA; |
bogdanm | 0:9b334a45a8ff | 154 | i2c_delay(AAIC_TSU); |
bogdanm | 0:9b334a45a8ff | 155 | break; |
bogdanm | 0:9b334a45a8ff | 156 | } |
bogdanm | 0:9b334a45a8ff | 157 | return data_receive_byte; |
bogdanm | 0:9b334a45a8ff | 158 | } |
bogdanm | 0:9b334a45a8ff | 159 | |
bogdanm | 0:9b334a45a8ff | 160 | static inline int i2c_receive_ack(i2c_t *obj) |
bogdanm | 0:9b334a45a8ff | 161 | { |
bogdanm | 0:9b334a45a8ff | 162 | int nack; |
bogdanm | 0:9b334a45a8ff | 163 | int delay_value; |
bogdanm | 0:9b334a45a8ff | 164 | switch ((int)obj->i2c) { |
bogdanm | 0:9b334a45a8ff | 165 | case I2C_0: delay_value = TSC_TSU; break; |
bogdanm | 0:9b334a45a8ff | 166 | case I2C_1: delay_value = AAIC_TSU; break; |
bogdanm | 0:9b334a45a8ff | 167 | } |
bogdanm | 0:9b334a45a8ff | 168 | |
bogdanm | 0:9b334a45a8ff | 169 | i2c_delay(delay_value); |
bogdanm | 0:9b334a45a8ff | 170 | obj->i2c->CONTROLS = SDA; |
bogdanm | 0:9b334a45a8ff | 171 | i2c_delay(delay_value); |
bogdanm | 0:9b334a45a8ff | 172 | obj->i2c->CONTROLC = SCL; |
bogdanm | 0:9b334a45a8ff | 173 | i2c_delay(delay_value); |
bogdanm | 0:9b334a45a8ff | 174 | obj->i2c->CONTROLS = SCL; |
bogdanm | 0:9b334a45a8ff | 175 | i2c_delay(delay_value); |
bogdanm | 0:9b334a45a8ff | 176 | nack = obj->i2c->CONTROL & SDA; |
bogdanm | 0:9b334a45a8ff | 177 | i2c_delay(delay_value); |
bogdanm | 0:9b334a45a8ff | 178 | obj->i2c->CONTROLC = SCL; |
bogdanm | 0:9b334a45a8ff | 179 | i2c_delay(delay_value); |
bogdanm | 0:9b334a45a8ff | 180 | obj->i2c->CONTROLS = SDA; |
bogdanm | 0:9b334a45a8ff | 181 | i2c_delay(delay_value); |
bogdanm | 0:9b334a45a8ff | 182 | if(nack==0) |
bogdanm | 0:9b334a45a8ff | 183 | return 1; |
bogdanm | 0:9b334a45a8ff | 184 | |
bogdanm | 0:9b334a45a8ff | 185 | return 0; |
bogdanm | 0:9b334a45a8ff | 186 | } |
bogdanm | 0:9b334a45a8ff | 187 | |
bogdanm | 0:9b334a45a8ff | 188 | |
bogdanm | 0:9b334a45a8ff | 189 | static inline void i2c_send_ack(i2c_t *obj) |
bogdanm | 0:9b334a45a8ff | 190 | { |
bogdanm | 0:9b334a45a8ff | 191 | int delay_value; |
bogdanm | 0:9b334a45a8ff | 192 | switch ((int)obj->i2c) { |
bogdanm | 0:9b334a45a8ff | 193 | case I2C_0: delay_value = TSC_TSU; break; |
bogdanm | 0:9b334a45a8ff | 194 | case I2C_1: delay_value = AAIC_TSU; break; |
bogdanm | 0:9b334a45a8ff | 195 | } |
bogdanm | 0:9b334a45a8ff | 196 | |
bogdanm | 0:9b334a45a8ff | 197 | i2c_delay(delay_value); |
bogdanm | 0:9b334a45a8ff | 198 | obj->i2c->CONTROLC = SCL; |
bogdanm | 0:9b334a45a8ff | 199 | i2c_delay(delay_value); |
bogdanm | 0:9b334a45a8ff | 200 | obj->i2c->CONTROLS = SDA; |
bogdanm | 0:9b334a45a8ff | 201 | i2c_delay(delay_value); |
bogdanm | 0:9b334a45a8ff | 202 | obj->i2c->CONTROLS = SCL; |
bogdanm | 0:9b334a45a8ff | 203 | i2c_delay(delay_value); |
bogdanm | 0:9b334a45a8ff | 204 | obj->i2c->CONTROLC = SCL; |
bogdanm | 0:9b334a45a8ff | 205 | i2c_delay(delay_value); |
bogdanm | 0:9b334a45a8ff | 206 | obj->i2c->CONTROLC = SDA; |
bogdanm | 0:9b334a45a8ff | 207 | i2c_delay(delay_value); |
bogdanm | 0:9b334a45a8ff | 208 | |
bogdanm | 0:9b334a45a8ff | 209 | } |
bogdanm | 0:9b334a45a8ff | 210 | |
bogdanm | 0:9b334a45a8ff | 211 | |
bogdanm | 0:9b334a45a8ff | 212 | void i2c_init(i2c_t *obj, PinName sda, PinName scl) { |
bogdanm | 0:9b334a45a8ff | 213 | |
bogdanm | 0:9b334a45a8ff | 214 | |
bogdanm | 0:9b334a45a8ff | 215 | // determine the SPI to use |
bogdanm | 0:9b334a45a8ff | 216 | I2CName i2c_sda = (I2CName)pinmap_peripheral(sda, PinMap_I2C_SDA); |
bogdanm | 0:9b334a45a8ff | 217 | I2CName i2c_scl = (I2CName)pinmap_peripheral(scl, PinMap_I2C_SCL); |
bogdanm | 0:9b334a45a8ff | 218 | obj->i2c = (MPS2_I2C_TypeDef *)pinmap_merge(i2c_sda, i2c_scl); |
bogdanm | 0:9b334a45a8ff | 219 | |
bogdanm | 0:9b334a45a8ff | 220 | if ((int)obj->i2c == NC) { |
bogdanm | 0:9b334a45a8ff | 221 | error("I2C pin mapping failed"); |
bogdanm | 0:9b334a45a8ff | 222 | } |
bogdanm | 0:9b334a45a8ff | 223 | |
bogdanm | 0:9b334a45a8ff | 224 | pinmap_pinout(sda, PinMap_I2C_SDA); |
bogdanm | 0:9b334a45a8ff | 225 | pinmap_pinout(scl, PinMap_I2C_SCL); |
bogdanm | 0:9b334a45a8ff | 226 | } |
bogdanm | 0:9b334a45a8ff | 227 | |
bogdanm | 0:9b334a45a8ff | 228 | int i2c_start(i2c_t *obj) { |
bogdanm | 0:9b334a45a8ff | 229 | |
bogdanm | 0:9b334a45a8ff | 230 | int delay_value; |
bogdanm | 0:9b334a45a8ff | 231 | switch ((int)obj->i2c) { |
bogdanm | 0:9b334a45a8ff | 232 | case I2C_0: delay_value = TSC_TSU; break; |
bogdanm | 0:9b334a45a8ff | 233 | case I2C_1: delay_value = AAIC_TSU; break; |
bogdanm | 0:9b334a45a8ff | 234 | } |
bogdanm | 0:9b334a45a8ff | 235 | i2c_delay(delay_value); |
bogdanm | 0:9b334a45a8ff | 236 | obj->i2c->CONTROLS = SDA | SCL; |
bogdanm | 0:9b334a45a8ff | 237 | i2c_delay(delay_value); |
bogdanm | 0:9b334a45a8ff | 238 | obj->i2c->CONTROLC = SDA; |
bogdanm | 0:9b334a45a8ff | 239 | i2c_delay(delay_value); |
bogdanm | 0:9b334a45a8ff | 240 | |
bogdanm | 0:9b334a45a8ff | 241 | |
bogdanm | 0:9b334a45a8ff | 242 | |
bogdanm | 0:9b334a45a8ff | 243 | return 0; |
bogdanm | 0:9b334a45a8ff | 244 | } |
bogdanm | 0:9b334a45a8ff | 245 | |
bogdanm | 0:9b334a45a8ff | 246 | int i2c_start_tsc(i2c_t *obj) { |
bogdanm | 0:9b334a45a8ff | 247 | |
bogdanm | 0:9b334a45a8ff | 248 | int delay_value; |
bogdanm | 0:9b334a45a8ff | 249 | switch ((int)obj->i2c) { |
bogdanm | 0:9b334a45a8ff | 250 | case I2C_0: delay_value = TSC_TSU; break; |
bogdanm | 0:9b334a45a8ff | 251 | case I2C_1: delay_value = AAIC_TSU; break; |
bogdanm | 0:9b334a45a8ff | 252 | } |
bogdanm | 0:9b334a45a8ff | 253 | i2c_delay(delay_value); |
bogdanm | 0:9b334a45a8ff | 254 | obj->i2c->CONTROLC = SDA; |
bogdanm | 0:9b334a45a8ff | 255 | i2c_delay(delay_value); |
bogdanm | 0:9b334a45a8ff | 256 | obj->i2c->CONTROLC = SCL; |
bogdanm | 0:9b334a45a8ff | 257 | i2c_delay(delay_value); |
bogdanm | 0:9b334a45a8ff | 258 | |
bogdanm | 0:9b334a45a8ff | 259 | return 0; |
bogdanm | 0:9b334a45a8ff | 260 | } |
bogdanm | 0:9b334a45a8ff | 261 | |
bogdanm | 0:9b334a45a8ff | 262 | int i2c_stop(i2c_t *obj) { |
bogdanm | 0:9b334a45a8ff | 263 | |
bogdanm | 0:9b334a45a8ff | 264 | int delay_value; |
bogdanm | 0:9b334a45a8ff | 265 | switch ((int)obj->i2c) { |
bogdanm | 0:9b334a45a8ff | 266 | case I2C_0: delay_value = TSC_TSU; break; |
bogdanm | 0:9b334a45a8ff | 267 | case I2C_1: delay_value = AAIC_TSU; break; |
bogdanm | 0:9b334a45a8ff | 268 | } |
bogdanm | 0:9b334a45a8ff | 269 | // Actual stop bit |
bogdanm | 0:9b334a45a8ff | 270 | i2c_delay(delay_value); |
bogdanm | 0:9b334a45a8ff | 271 | obj->i2c->CONTROLC = SDA; |
bogdanm | 0:9b334a45a8ff | 272 | i2c_delay(delay_value); |
bogdanm | 0:9b334a45a8ff | 273 | obj->i2c->CONTROLS = SCL; |
bogdanm | 0:9b334a45a8ff | 274 | i2c_delay(delay_value); |
bogdanm | 0:9b334a45a8ff | 275 | obj->i2c->CONTROLS = SDA; |
bogdanm | 0:9b334a45a8ff | 276 | i2c_delay(delay_value); |
bogdanm | 0:9b334a45a8ff | 277 | |
bogdanm | 0:9b334a45a8ff | 278 | return 0; |
bogdanm | 0:9b334a45a8ff | 279 | } |
bogdanm | 0:9b334a45a8ff | 280 | |
bogdanm | 0:9b334a45a8ff | 281 | |
bogdanm | 0:9b334a45a8ff | 282 | |
bogdanm | 0:9b334a45a8ff | 283 | void i2c_frequency(i2c_t *obj, int hz) { |
bogdanm | 0:9b334a45a8ff | 284 | } |
bogdanm | 0:9b334a45a8ff | 285 | |
bogdanm | 0:9b334a45a8ff | 286 | int i2c_read(i2c_t *obj, int address, char *data, int length, int stop) { |
bogdanm | 0:9b334a45a8ff | 287 | unsigned int loop, rxdata; |
bogdanm | 0:9b334a45a8ff | 288 | int delay_value, sadr, ack, bytes_read; |
bogdanm | 0:9b334a45a8ff | 289 | rxdata=0; |
bogdanm | 0:9b334a45a8ff | 290 | switch ((int)obj->i2c) { |
bogdanm | 0:9b334a45a8ff | 291 | case I2C_0: |
bogdanm | 0:9b334a45a8ff | 292 | delay_value = TSC_TSU; |
bogdanm | 0:9b334a45a8ff | 293 | sadr = TSC_I2C_ADDR; |
bogdanm | 0:9b334a45a8ff | 294 | break; |
bogdanm | 0:9b334a45a8ff | 295 | case I2C_1: |
bogdanm | 0:9b334a45a8ff | 296 | delay_value = AAIC_TSU; |
bogdanm | 0:9b334a45a8ff | 297 | sadr = AAIC_I2C_ADDR; |
bogdanm | 0:9b334a45a8ff | 298 | break; |
bogdanm | 0:9b334a45a8ff | 299 | } |
bogdanm | 0:9b334a45a8ff | 300 | // Start bit |
bogdanm | 0:9b334a45a8ff | 301 | i2c_start(obj); |
bogdanm | 0:9b334a45a8ff | 302 | |
bogdanm | 0:9b334a45a8ff | 303 | // Set serial and register address |
bogdanm | 0:9b334a45a8ff | 304 | i2c_send_byte(obj,sadr); |
bogdanm | 0:9b334a45a8ff | 305 | ack += i2c_receive_ack(obj); |
bogdanm | 0:9b334a45a8ff | 306 | i2c_send_byte(obj, address); |
bogdanm | 0:9b334a45a8ff | 307 | ack += i2c_receive_ack(obj); |
bogdanm | 0:9b334a45a8ff | 308 | |
bogdanm | 0:9b334a45a8ff | 309 | // Stop bit |
bogdanm | 0:9b334a45a8ff | 310 | i2c_stop(obj); |
bogdanm | 0:9b334a45a8ff | 311 | |
bogdanm | 0:9b334a45a8ff | 312 | // Start bit |
bogdanm | 0:9b334a45a8ff | 313 | i2c_start_tsc(obj); |
bogdanm | 0:9b334a45a8ff | 314 | |
bogdanm | 0:9b334a45a8ff | 315 | // Read from serial address |
bogdanm | 0:9b334a45a8ff | 316 | i2c_send_byte(obj,sadr | 1); |
bogdanm | 0:9b334a45a8ff | 317 | ack += i2c_receive_ack(obj); |
bogdanm | 0:9b334a45a8ff | 318 | bytes_read = 0; |
bogdanm | 0:9b334a45a8ff | 319 | |
bogdanm | 0:9b334a45a8ff | 320 | switch ((int)obj->i2c) { |
bogdanm | 0:9b334a45a8ff | 321 | case I2C_0: |
bogdanm | 0:9b334a45a8ff | 322 | rxdata = (i2c_receive_byte(obj) & 0xFF); |
bogdanm | 0:9b334a45a8ff | 323 | data[((length-1)-bytes_read)] = (char)rxdata; |
bogdanm | 0:9b334a45a8ff | 324 | bytes_read++; |
bogdanm | 0:9b334a45a8ff | 325 | // Read multiple bytes |
bogdanm | 0:9b334a45a8ff | 326 | if ((length > 1) && (length < 5)) |
bogdanm | 0:9b334a45a8ff | 327 | { |
bogdanm | 0:9b334a45a8ff | 328 | for (loop = 1; loop <= (length - 1); loop++) |
bogdanm | 0:9b334a45a8ff | 329 | { |
bogdanm | 0:9b334a45a8ff | 330 | // Send ACK |
bogdanm | 0:9b334a45a8ff | 331 | i2c_delay(delay_value); |
bogdanm | 0:9b334a45a8ff | 332 | obj->i2c->CONTROLC = SDA; |
bogdanm | 0:9b334a45a8ff | 333 | i2c_delay(delay_value); |
bogdanm | 0:9b334a45a8ff | 334 | obj->i2c->CONTROLS = SCL; |
bogdanm | 0:9b334a45a8ff | 335 | i2c_delay(delay_value); |
bogdanm | 0:9b334a45a8ff | 336 | obj->i2c->CONTROLC = SCL; |
bogdanm | 0:9b334a45a8ff | 337 | i2c_delay(delay_value); |
bogdanm | 0:9b334a45a8ff | 338 | |
bogdanm | 0:9b334a45a8ff | 339 | rxdata = i2c_receive_byte(obj); |
bogdanm | 0:9b334a45a8ff | 340 | data[(length-1)-bytes_read] = (char)rxdata; |
bogdanm | 0:9b334a45a8ff | 341 | bytes_read++; |
bogdanm | 0:9b334a45a8ff | 342 | |
bogdanm | 0:9b334a45a8ff | 343 | } |
bogdanm | 0:9b334a45a8ff | 344 | } |
bogdanm | 0:9b334a45a8ff | 345 | break; |
bogdanm | 0:9b334a45a8ff | 346 | case I2C_1: |
bogdanm | 0:9b334a45a8ff | 347 | rxdata = i2c_receive_byte(obj); |
bogdanm | 0:9b334a45a8ff | 348 | data[bytes_read] = (char)rxdata; |
bogdanm | 0:9b334a45a8ff | 349 | bytes_read++; |
bogdanm | 0:9b334a45a8ff | 350 | break; |
bogdanm | 0:9b334a45a8ff | 351 | } |
bogdanm | 0:9b334a45a8ff | 352 | i2c_send_ack(obj); |
bogdanm | 0:9b334a45a8ff | 353 | |
bogdanm | 0:9b334a45a8ff | 354 | // Actual stop bit |
bogdanm | 0:9b334a45a8ff | 355 | i2c_stop(obj); |
bogdanm | 0:9b334a45a8ff | 356 | |
bogdanm | 0:9b334a45a8ff | 357 | return bytes_read; |
bogdanm | 0:9b334a45a8ff | 358 | } |
bogdanm | 0:9b334a45a8ff | 359 | |
bogdanm | 0:9b334a45a8ff | 360 | int i2c_write(i2c_t *obj, int address, const char *data, int length, int stop) { |
bogdanm | 0:9b334a45a8ff | 361 | int ack=0; |
bogdanm | 0:9b334a45a8ff | 362 | int sadr; |
bogdanm | 0:9b334a45a8ff | 363 | switch ((int)obj->i2c) { |
bogdanm | 0:9b334a45a8ff | 364 | case I2C_0: sadr = TSC_I2C_ADDR; break; |
bogdanm | 0:9b334a45a8ff | 365 | case I2C_1: sadr = AAIC_I2C_ADDR; break; |
bogdanm | 0:9b334a45a8ff | 366 | } |
bogdanm | 0:9b334a45a8ff | 367 | for(int i = 1; i<=length; i++) |
bogdanm | 0:9b334a45a8ff | 368 | { |
bogdanm | 0:9b334a45a8ff | 369 | i2c_start(obj); |
bogdanm | 0:9b334a45a8ff | 370 | |
bogdanm | 0:9b334a45a8ff | 371 | // Set serial and register address |
bogdanm | 0:9b334a45a8ff | 372 | i2c_send_byte(obj,sadr); |
bogdanm | 0:9b334a45a8ff | 373 | ack += i2c_receive_ack(obj); |
bogdanm | 0:9b334a45a8ff | 374 | i2c_send_byte(obj, address); |
bogdanm | 0:9b334a45a8ff | 375 | ack += i2c_receive_ack(obj); |
bogdanm | 0:9b334a45a8ff | 376 | i2c_send_byte(obj, *data); |
bogdanm | 0:9b334a45a8ff | 377 | ack += i2c_receive_ack(obj); |
bogdanm | 0:9b334a45a8ff | 378 | } |
bogdanm | 0:9b334a45a8ff | 379 | |
bogdanm | 0:9b334a45a8ff | 380 | i2c_stop(obj); |
bogdanm | 0:9b334a45a8ff | 381 | if(ack==3) { return 1; } |
bogdanm | 0:9b334a45a8ff | 382 | else{ return 0; } |
bogdanm | 0:9b334a45a8ff | 383 | |
bogdanm | 0:9b334a45a8ff | 384 | } |
bogdanm | 0:9b334a45a8ff | 385 | |
bogdanm | 0:9b334a45a8ff | 386 | void i2c_reset(i2c_t *obj) { |
bogdanm | 0:9b334a45a8ff | 387 | i2c_stop(obj); |
bogdanm | 0:9b334a45a8ff | 388 | } |
bogdanm | 0:9b334a45a8ff | 389 | |
bogdanm | 0:9b334a45a8ff | 390 | int i2c_byte_read(i2c_t *obj, int last) { |
bogdanm | 0:9b334a45a8ff | 391 | return 0; |
bogdanm | 0:9b334a45a8ff | 392 | } |
bogdanm | 0:9b334a45a8ff | 393 | |
bogdanm | 0:9b334a45a8ff | 394 | int i2c_byte_write(i2c_t *obj, int data) { |
bogdanm | 0:9b334a45a8ff | 395 | return 0; |
bogdanm | 0:9b334a45a8ff | 396 | } |
bogdanm | 0:9b334a45a8ff | 397 | |
bogdanm | 0:9b334a45a8ff | 398 | void i2c_slave_mode(i2c_t *obj, int enable_slave) { |
bogdanm | 0:9b334a45a8ff | 399 | } |
bogdanm | 0:9b334a45a8ff | 400 | |
bogdanm | 0:9b334a45a8ff | 401 | int i2c_slave_receive(i2c_t *obj) { |
bogdanm | 0:9b334a45a8ff | 402 | return 0; |
bogdanm | 0:9b334a45a8ff | 403 | } |
bogdanm | 0:9b334a45a8ff | 404 | |
bogdanm | 0:9b334a45a8ff | 405 | int i2c_slave_read(i2c_t *obj, char *data, int length) { |
bogdanm | 0:9b334a45a8ff | 406 | return 0; |
bogdanm | 0:9b334a45a8ff | 407 | } |
bogdanm | 0:9b334a45a8ff | 408 | |
bogdanm | 0:9b334a45a8ff | 409 | int i2c_slave_write(i2c_t *obj, const char *data, int length) { |
bogdanm | 0:9b334a45a8ff | 410 | return 0; |
bogdanm | 0:9b334a45a8ff | 411 | } |
bogdanm | 0:9b334a45a8ff | 412 | |
bogdanm | 0:9b334a45a8ff | 413 | void i2c_slave_address(i2c_t *obj, int idx, uint32_t address, uint32_t mask) { |
bogdanm | 0:9b334a45a8ff | 414 | } |
bogdanm | 0:9b334a45a8ff | 415 |