david lukofsky
/
STM32_read_analog
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mySPI/mySPI.cpp@1:df1ae6d3fd03, 2018-11-13 (annotated)
- Committer:
- lukofsky
- Date:
- Tue Nov 13 19:27:58 2018 +0000
- Revision:
- 1:df1ae6d3fd03
Memulator;
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| lukofsky | 1:df1ae6d3fd03 | 1 | //////////////////////////////////////////////////////////////////////// |
| lukofsky | 1:df1ae6d3fd03 | 2 | // NOTE: two changes |
| lukofsky | 1:df1ae6d3fd03 | 3 | // (1) include "mySPI.h" instead of "SPI.h" |
| lukofsky | 1:df1ae6d3fd03 | 4 | // (2) commented out lock, _acquire, and unlock from the write method |
| lukofsky | 1:df1ae6d3fd03 | 5 | //////////////////////////////////////////////////////////////////////// |
| lukofsky | 1:df1ae6d3fd03 | 6 | |
| lukofsky | 1:df1ae6d3fd03 | 7 | /* mbed Microcontroller Library |
| lukofsky | 1:df1ae6d3fd03 | 8 | |
| lukofsky | 1:df1ae6d3fd03 | 9 | * Copyright (c) 2006-2013 ARM Limited |
| lukofsky | 1:df1ae6d3fd03 | 10 | |
| lukofsky | 1:df1ae6d3fd03 | 11 | * |
| lukofsky | 1:df1ae6d3fd03 | 12 | |
| lukofsky | 1:df1ae6d3fd03 | 13 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| lukofsky | 1:df1ae6d3fd03 | 14 | |
| lukofsky | 1:df1ae6d3fd03 | 15 | * you may not use this file except in compliance with the License. |
| lukofsky | 1:df1ae6d3fd03 | 16 | |
| lukofsky | 1:df1ae6d3fd03 | 17 | * You may obtain a copy of the License at |
| lukofsky | 1:df1ae6d3fd03 | 18 | |
| lukofsky | 1:df1ae6d3fd03 | 19 | * |
| lukofsky | 1:df1ae6d3fd03 | 20 | |
| lukofsky | 1:df1ae6d3fd03 | 21 | * http://www.apache.org/licenses/LICENSE-2.0 |
| lukofsky | 1:df1ae6d3fd03 | 22 | |
| lukofsky | 1:df1ae6d3fd03 | 23 | * |
| lukofsky | 1:df1ae6d3fd03 | 24 | |
| lukofsky | 1:df1ae6d3fd03 | 25 | * Unless required by applicable law or agreed to in writing, software |
| lukofsky | 1:df1ae6d3fd03 | 26 | |
| lukofsky | 1:df1ae6d3fd03 | 27 | * distributed under the License is distributed on an "AS IS" BASIS, |
| lukofsky | 1:df1ae6d3fd03 | 28 | |
| lukofsky | 1:df1ae6d3fd03 | 29 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| lukofsky | 1:df1ae6d3fd03 | 30 | |
| lukofsky | 1:df1ae6d3fd03 | 31 | * See the License for the specific language governing permissions and |
| lukofsky | 1:df1ae6d3fd03 | 32 | |
| lukofsky | 1:df1ae6d3fd03 | 33 | * limitations under the License. |
| lukofsky | 1:df1ae6d3fd03 | 34 | |
| lukofsky | 1:df1ae6d3fd03 | 35 | */ |
| lukofsky | 1:df1ae6d3fd03 | 36 | |
| lukofsky | 1:df1ae6d3fd03 | 37 | // include custom SPI header file instead of default SPI header file |
| lukofsky | 1:df1ae6d3fd03 | 38 | //#include "drivers/SPI.h" |
| lukofsky | 1:df1ae6d3fd03 | 39 | #include "mySPI.h" |
| lukofsky | 1:df1ae6d3fd03 | 40 | |
| lukofsky | 1:df1ae6d3fd03 | 41 | #include "platform/mbed_critical.h" |
| lukofsky | 1:df1ae6d3fd03 | 42 | |
| lukofsky | 1:df1ae6d3fd03 | 43 | |
| lukofsky | 1:df1ae6d3fd03 | 44 | |
| lukofsky | 1:df1ae6d3fd03 | 45 | #if DEVICE_SPI_ASYNCH |
| lukofsky | 1:df1ae6d3fd03 | 46 | |
| lukofsky | 1:df1ae6d3fd03 | 47 | #include "platform/mbed_power_mgmt.h" |
| lukofsky | 1:df1ae6d3fd03 | 48 | |
| lukofsky | 1:df1ae6d3fd03 | 49 | #endif |
| lukofsky | 1:df1ae6d3fd03 | 50 | |
| lukofsky | 1:df1ae6d3fd03 | 51 | |
| lukofsky | 1:df1ae6d3fd03 | 52 | |
| lukofsky | 1:df1ae6d3fd03 | 53 | #if DEVICE_SPI |
| lukofsky | 1:df1ae6d3fd03 | 54 | |
| lukofsky | 1:df1ae6d3fd03 | 55 | |
| lukofsky | 1:df1ae6d3fd03 | 56 | |
| lukofsky | 1:df1ae6d3fd03 | 57 | namespace mbed { |
| lukofsky | 1:df1ae6d3fd03 | 58 | |
| lukofsky | 1:df1ae6d3fd03 | 59 | |
| lukofsky | 1:df1ae6d3fd03 | 60 | |
| lukofsky | 1:df1ae6d3fd03 | 61 | #if DEVICE_SPI_ASYNCH && TRANSACTION_QUEUE_SIZE_SPI |
| lukofsky | 1:df1ae6d3fd03 | 62 | |
| lukofsky | 1:df1ae6d3fd03 | 63 | CircularBuffer<Transaction<SPI>, TRANSACTION_QUEUE_SIZE_SPI> SPI::_transaction_buffer; |
| lukofsky | 1:df1ae6d3fd03 | 64 | |
| lukofsky | 1:df1ae6d3fd03 | 65 | #endif |
| lukofsky | 1:df1ae6d3fd03 | 66 | |
| lukofsky | 1:df1ae6d3fd03 | 67 | |
| lukofsky | 1:df1ae6d3fd03 | 68 | |
| lukofsky | 1:df1ae6d3fd03 | 69 | SPI::SPI(PinName mosi, PinName miso, PinName sclk, PinName ssel) : |
| lukofsky | 1:df1ae6d3fd03 | 70 | |
| lukofsky | 1:df1ae6d3fd03 | 71 | _spi(), |
| lukofsky | 1:df1ae6d3fd03 | 72 | |
| lukofsky | 1:df1ae6d3fd03 | 73 | #if DEVICE_SPI_ASYNCH |
| lukofsky | 1:df1ae6d3fd03 | 74 | |
| lukofsky | 1:df1ae6d3fd03 | 75 | _irq(this), |
| lukofsky | 1:df1ae6d3fd03 | 76 | |
| lukofsky | 1:df1ae6d3fd03 | 77 | _usage(DMA_USAGE_NEVER), |
| lukofsky | 1:df1ae6d3fd03 | 78 | |
| lukofsky | 1:df1ae6d3fd03 | 79 | _deep_sleep_locked(false), |
| lukofsky | 1:df1ae6d3fd03 | 80 | |
| lukofsky | 1:df1ae6d3fd03 | 81 | #endif |
| lukofsky | 1:df1ae6d3fd03 | 82 | |
| lukofsky | 1:df1ae6d3fd03 | 83 | _bits(8), |
| lukofsky | 1:df1ae6d3fd03 | 84 | |
| lukofsky | 1:df1ae6d3fd03 | 85 | _mode(0), |
| lukofsky | 1:df1ae6d3fd03 | 86 | |
| lukofsky | 1:df1ae6d3fd03 | 87 | _hz(1000000), |
| lukofsky | 1:df1ae6d3fd03 | 88 | |
| lukofsky | 1:df1ae6d3fd03 | 89 | _write_fill(SPI_FILL_CHAR) |
| lukofsky | 1:df1ae6d3fd03 | 90 | |
| lukofsky | 1:df1ae6d3fd03 | 91 | { |
| lukofsky | 1:df1ae6d3fd03 | 92 | |
| lukofsky | 1:df1ae6d3fd03 | 93 | // No lock needed in the constructor |
| lukofsky | 1:df1ae6d3fd03 | 94 | |
| lukofsky | 1:df1ae6d3fd03 | 95 | |
| lukofsky | 1:df1ae6d3fd03 | 96 | |
| lukofsky | 1:df1ae6d3fd03 | 97 | spi_init(&_spi, mosi, miso, sclk, ssel); |
| lukofsky | 1:df1ae6d3fd03 | 98 | |
| lukofsky | 1:df1ae6d3fd03 | 99 | _acquire(); |
| lukofsky | 1:df1ae6d3fd03 | 100 | |
| lukofsky | 1:df1ae6d3fd03 | 101 | } |
| lukofsky | 1:df1ae6d3fd03 | 102 | |
| lukofsky | 1:df1ae6d3fd03 | 103 | |
| lukofsky | 1:df1ae6d3fd03 | 104 | |
| lukofsky | 1:df1ae6d3fd03 | 105 | void SPI::format(int bits, int mode) |
| lukofsky | 1:df1ae6d3fd03 | 106 | |
| lukofsky | 1:df1ae6d3fd03 | 107 | { |
| lukofsky | 1:df1ae6d3fd03 | 108 | |
| lukofsky | 1:df1ae6d3fd03 | 109 | lock(); |
| lukofsky | 1:df1ae6d3fd03 | 110 | |
| lukofsky | 1:df1ae6d3fd03 | 111 | _bits = bits; |
| lukofsky | 1:df1ae6d3fd03 | 112 | |
| lukofsky | 1:df1ae6d3fd03 | 113 | _mode = mode; |
| lukofsky | 1:df1ae6d3fd03 | 114 | |
| lukofsky | 1:df1ae6d3fd03 | 115 | // If changing format while you are the owner then just |
| lukofsky | 1:df1ae6d3fd03 | 116 | |
| lukofsky | 1:df1ae6d3fd03 | 117 | // update format, but if owner is changed then even frequency should be |
| lukofsky | 1:df1ae6d3fd03 | 118 | |
| lukofsky | 1:df1ae6d3fd03 | 119 | // updated which is done by acquire. |
| lukofsky | 1:df1ae6d3fd03 | 120 | |
| lukofsky | 1:df1ae6d3fd03 | 121 | if (_owner == this) { |
| lukofsky | 1:df1ae6d3fd03 | 122 | |
| lukofsky | 1:df1ae6d3fd03 | 123 | spi_format(&_spi, _bits, _mode, 0); |
| lukofsky | 1:df1ae6d3fd03 | 124 | |
| lukofsky | 1:df1ae6d3fd03 | 125 | } else { |
| lukofsky | 1:df1ae6d3fd03 | 126 | |
| lukofsky | 1:df1ae6d3fd03 | 127 | _acquire(); |
| lukofsky | 1:df1ae6d3fd03 | 128 | |
| lukofsky | 1:df1ae6d3fd03 | 129 | } |
| lukofsky | 1:df1ae6d3fd03 | 130 | |
| lukofsky | 1:df1ae6d3fd03 | 131 | unlock(); |
| lukofsky | 1:df1ae6d3fd03 | 132 | |
| lukofsky | 1:df1ae6d3fd03 | 133 | } |
| lukofsky | 1:df1ae6d3fd03 | 134 | |
| lukofsky | 1:df1ae6d3fd03 | 135 | |
| lukofsky | 1:df1ae6d3fd03 | 136 | |
| lukofsky | 1:df1ae6d3fd03 | 137 | void SPI::frequency(int hz) |
| lukofsky | 1:df1ae6d3fd03 | 138 | |
| lukofsky | 1:df1ae6d3fd03 | 139 | { |
| lukofsky | 1:df1ae6d3fd03 | 140 | |
| lukofsky | 1:df1ae6d3fd03 | 141 | lock(); |
| lukofsky | 1:df1ae6d3fd03 | 142 | |
| lukofsky | 1:df1ae6d3fd03 | 143 | _hz = hz; |
| lukofsky | 1:df1ae6d3fd03 | 144 | |
| lukofsky | 1:df1ae6d3fd03 | 145 | // If changing format while you are the owner then just |
| lukofsky | 1:df1ae6d3fd03 | 146 | |
| lukofsky | 1:df1ae6d3fd03 | 147 | // update frequency, but if owner is changed then even frequency should be |
| lukofsky | 1:df1ae6d3fd03 | 148 | |
| lukofsky | 1:df1ae6d3fd03 | 149 | // updated which is done by acquire. |
| lukofsky | 1:df1ae6d3fd03 | 150 | |
| lukofsky | 1:df1ae6d3fd03 | 151 | if (_owner == this) { |
| lukofsky | 1:df1ae6d3fd03 | 152 | |
| lukofsky | 1:df1ae6d3fd03 | 153 | spi_frequency(&_spi, _hz); |
| lukofsky | 1:df1ae6d3fd03 | 154 | |
| lukofsky | 1:df1ae6d3fd03 | 155 | } else { |
| lukofsky | 1:df1ae6d3fd03 | 156 | |
| lukofsky | 1:df1ae6d3fd03 | 157 | _acquire(); |
| lukofsky | 1:df1ae6d3fd03 | 158 | |
| lukofsky | 1:df1ae6d3fd03 | 159 | } |
| lukofsky | 1:df1ae6d3fd03 | 160 | |
| lukofsky | 1:df1ae6d3fd03 | 161 | unlock(); |
| lukofsky | 1:df1ae6d3fd03 | 162 | |
| lukofsky | 1:df1ae6d3fd03 | 163 | } |
| lukofsky | 1:df1ae6d3fd03 | 164 | |
| lukofsky | 1:df1ae6d3fd03 | 165 | |
| lukofsky | 1:df1ae6d3fd03 | 166 | |
| lukofsky | 1:df1ae6d3fd03 | 167 | SPI *SPI::_owner = NULL; |
| lukofsky | 1:df1ae6d3fd03 | 168 | |
| lukofsky | 1:df1ae6d3fd03 | 169 | SingletonPtr<PlatformMutex> SPI::_mutex; |
| lukofsky | 1:df1ae6d3fd03 | 170 | |
| lukofsky | 1:df1ae6d3fd03 | 171 | |
| lukofsky | 1:df1ae6d3fd03 | 172 | |
| lukofsky | 1:df1ae6d3fd03 | 173 | // ignore the fact there are multiple physical spis, and always update if it wasn't us last |
| lukofsky | 1:df1ae6d3fd03 | 174 | |
| lukofsky | 1:df1ae6d3fd03 | 175 | void SPI::aquire() |
| lukofsky | 1:df1ae6d3fd03 | 176 | |
| lukofsky | 1:df1ae6d3fd03 | 177 | { |
| lukofsky | 1:df1ae6d3fd03 | 178 | |
| lukofsky | 1:df1ae6d3fd03 | 179 | lock(); |
| lukofsky | 1:df1ae6d3fd03 | 180 | |
| lukofsky | 1:df1ae6d3fd03 | 181 | if (_owner != this) { |
| lukofsky | 1:df1ae6d3fd03 | 182 | |
| lukofsky | 1:df1ae6d3fd03 | 183 | spi_format(&_spi, _bits, _mode, 0); |
| lukofsky | 1:df1ae6d3fd03 | 184 | |
| lukofsky | 1:df1ae6d3fd03 | 185 | spi_frequency(&_spi, _hz); |
| lukofsky | 1:df1ae6d3fd03 | 186 | |
| lukofsky | 1:df1ae6d3fd03 | 187 | _owner = this; |
| lukofsky | 1:df1ae6d3fd03 | 188 | |
| lukofsky | 1:df1ae6d3fd03 | 189 | } |
| lukofsky | 1:df1ae6d3fd03 | 190 | |
| lukofsky | 1:df1ae6d3fd03 | 191 | unlock(); |
| lukofsky | 1:df1ae6d3fd03 | 192 | |
| lukofsky | 1:df1ae6d3fd03 | 193 | } |
| lukofsky | 1:df1ae6d3fd03 | 194 | |
| lukofsky | 1:df1ae6d3fd03 | 195 | |
| lukofsky | 1:df1ae6d3fd03 | 196 | |
| lukofsky | 1:df1ae6d3fd03 | 197 | // Note: Private function with no locking |
| lukofsky | 1:df1ae6d3fd03 | 198 | |
| lukofsky | 1:df1ae6d3fd03 | 199 | void SPI::_acquire() |
| lukofsky | 1:df1ae6d3fd03 | 200 | |
| lukofsky | 1:df1ae6d3fd03 | 201 | { |
| lukofsky | 1:df1ae6d3fd03 | 202 | |
| lukofsky | 1:df1ae6d3fd03 | 203 | if (_owner != this) { |
| lukofsky | 1:df1ae6d3fd03 | 204 | |
| lukofsky | 1:df1ae6d3fd03 | 205 | spi_format(&_spi, _bits, _mode, 0); |
| lukofsky | 1:df1ae6d3fd03 | 206 | |
| lukofsky | 1:df1ae6d3fd03 | 207 | spi_frequency(&_spi, _hz); |
| lukofsky | 1:df1ae6d3fd03 | 208 | |
| lukofsky | 1:df1ae6d3fd03 | 209 | _owner = this; |
| lukofsky | 1:df1ae6d3fd03 | 210 | |
| lukofsky | 1:df1ae6d3fd03 | 211 | } |
| lukofsky | 1:df1ae6d3fd03 | 212 | |
| lukofsky | 1:df1ae6d3fd03 | 213 | } |
| lukofsky | 1:df1ae6d3fd03 | 214 | |
| lukofsky | 1:df1ae6d3fd03 | 215 | |
| lukofsky | 1:df1ae6d3fd03 | 216 | |
| lukofsky | 1:df1ae6d3fd03 | 217 | int SPI::write(int value) |
| lukofsky | 1:df1ae6d3fd03 | 218 | |
| lukofsky | 1:df1ae6d3fd03 | 219 | { |
| lukofsky | 1:df1ae6d3fd03 | 220 | |
| lukofsky | 1:df1ae6d3fd03 | 221 | // lock(); |
| lukofsky | 1:df1ae6d3fd03 | 222 | |
| lukofsky | 1:df1ae6d3fd03 | 223 | // _acquire(); |
| lukofsky | 1:df1ae6d3fd03 | 224 | |
| lukofsky | 1:df1ae6d3fd03 | 225 | int ret = spi_master_write(&_spi, value); |
| lukofsky | 1:df1ae6d3fd03 | 226 | |
| lukofsky | 1:df1ae6d3fd03 | 227 | // unlock(); |
| lukofsky | 1:df1ae6d3fd03 | 228 | |
| lukofsky | 1:df1ae6d3fd03 | 229 | return ret; |
| lukofsky | 1:df1ae6d3fd03 | 230 | |
| lukofsky | 1:df1ae6d3fd03 | 231 | } |
| lukofsky | 1:df1ae6d3fd03 | 232 | |
| lukofsky | 1:df1ae6d3fd03 | 233 | |
| lukofsky | 1:df1ae6d3fd03 | 234 | |
| lukofsky | 1:df1ae6d3fd03 | 235 | int SPI::write(const char *tx_buffer, int tx_length, char *rx_buffer, int rx_length) |
| lukofsky | 1:df1ae6d3fd03 | 236 | |
| lukofsky | 1:df1ae6d3fd03 | 237 | { |
| lukofsky | 1:df1ae6d3fd03 | 238 | |
| lukofsky | 1:df1ae6d3fd03 | 239 | lock(); |
| lukofsky | 1:df1ae6d3fd03 | 240 | |
| lukofsky | 1:df1ae6d3fd03 | 241 | _acquire(); |
| lukofsky | 1:df1ae6d3fd03 | 242 | |
| lukofsky | 1:df1ae6d3fd03 | 243 | int ret = spi_master_block_write(&_spi, tx_buffer, tx_length, rx_buffer, rx_length, _write_fill); |
| lukofsky | 1:df1ae6d3fd03 | 244 | |
| lukofsky | 1:df1ae6d3fd03 | 245 | unlock(); |
| lukofsky | 1:df1ae6d3fd03 | 246 | |
| lukofsky | 1:df1ae6d3fd03 | 247 | return ret; |
| lukofsky | 1:df1ae6d3fd03 | 248 | |
| lukofsky | 1:df1ae6d3fd03 | 249 | } |
| lukofsky | 1:df1ae6d3fd03 | 250 | |
| lukofsky | 1:df1ae6d3fd03 | 251 | |
| lukofsky | 1:df1ae6d3fd03 | 252 | |
| lukofsky | 1:df1ae6d3fd03 | 253 | void SPI::lock() |
| lukofsky | 1:df1ae6d3fd03 | 254 | |
| lukofsky | 1:df1ae6d3fd03 | 255 | { |
| lukofsky | 1:df1ae6d3fd03 | 256 | |
| lukofsky | 1:df1ae6d3fd03 | 257 | _mutex->lock(); |
| lukofsky | 1:df1ae6d3fd03 | 258 | |
| lukofsky | 1:df1ae6d3fd03 | 259 | } |
| lukofsky | 1:df1ae6d3fd03 | 260 | |
| lukofsky | 1:df1ae6d3fd03 | 261 | |
| lukofsky | 1:df1ae6d3fd03 | 262 | |
| lukofsky | 1:df1ae6d3fd03 | 263 | void SPI::unlock() |
| lukofsky | 1:df1ae6d3fd03 | 264 | |
| lukofsky | 1:df1ae6d3fd03 | 265 | { |
| lukofsky | 1:df1ae6d3fd03 | 266 | |
| lukofsky | 1:df1ae6d3fd03 | 267 | _mutex->unlock(); |
| lukofsky | 1:df1ae6d3fd03 | 268 | |
| lukofsky | 1:df1ae6d3fd03 | 269 | } |
| lukofsky | 1:df1ae6d3fd03 | 270 | |
| lukofsky | 1:df1ae6d3fd03 | 271 | |
| lukofsky | 1:df1ae6d3fd03 | 272 | |
| lukofsky | 1:df1ae6d3fd03 | 273 | void SPI::set_default_write_value(char data) |
| lukofsky | 1:df1ae6d3fd03 | 274 | |
| lukofsky | 1:df1ae6d3fd03 | 275 | { |
| lukofsky | 1:df1ae6d3fd03 | 276 | |
| lukofsky | 1:df1ae6d3fd03 | 277 | lock(); |
| lukofsky | 1:df1ae6d3fd03 | 278 | |
| lukofsky | 1:df1ae6d3fd03 | 279 | _write_fill = data; |
| lukofsky | 1:df1ae6d3fd03 | 280 | |
| lukofsky | 1:df1ae6d3fd03 | 281 | unlock(); |
| lukofsky | 1:df1ae6d3fd03 | 282 | |
| lukofsky | 1:df1ae6d3fd03 | 283 | } |
| lukofsky | 1:df1ae6d3fd03 | 284 | |
| lukofsky | 1:df1ae6d3fd03 | 285 | |
| lukofsky | 1:df1ae6d3fd03 | 286 | |
| lukofsky | 1:df1ae6d3fd03 | 287 | #if DEVICE_SPI_ASYNCH |
| lukofsky | 1:df1ae6d3fd03 | 288 | |
| lukofsky | 1:df1ae6d3fd03 | 289 | |
| lukofsky | 1:df1ae6d3fd03 | 290 | |
| lukofsky | 1:df1ae6d3fd03 | 291 | int SPI::transfer(const void *tx_buffer, int tx_length, void *rx_buffer, int rx_length, unsigned char bit_width, const event_callback_t &callback, int event) |
| lukofsky | 1:df1ae6d3fd03 | 292 | |
| lukofsky | 1:df1ae6d3fd03 | 293 | { |
| lukofsky | 1:df1ae6d3fd03 | 294 | |
| lukofsky | 1:df1ae6d3fd03 | 295 | if (spi_active(&_spi)) { |
| lukofsky | 1:df1ae6d3fd03 | 296 | |
| lukofsky | 1:df1ae6d3fd03 | 297 | return queue_transfer(tx_buffer, tx_length, rx_buffer, rx_length, bit_width, callback, event); |
| lukofsky | 1:df1ae6d3fd03 | 298 | |
| lukofsky | 1:df1ae6d3fd03 | 299 | } |
| lukofsky | 1:df1ae6d3fd03 | 300 | |
| lukofsky | 1:df1ae6d3fd03 | 301 | start_transfer(tx_buffer, tx_length, rx_buffer, rx_length, bit_width, callback, event); |
| lukofsky | 1:df1ae6d3fd03 | 302 | |
| lukofsky | 1:df1ae6d3fd03 | 303 | return 0; |
| lukofsky | 1:df1ae6d3fd03 | 304 | |
| lukofsky | 1:df1ae6d3fd03 | 305 | } |
| lukofsky | 1:df1ae6d3fd03 | 306 | |
| lukofsky | 1:df1ae6d3fd03 | 307 | |
| lukofsky | 1:df1ae6d3fd03 | 308 | |
| lukofsky | 1:df1ae6d3fd03 | 309 | void SPI::abort_transfer() |
| lukofsky | 1:df1ae6d3fd03 | 310 | |
| lukofsky | 1:df1ae6d3fd03 | 311 | { |
| lukofsky | 1:df1ae6d3fd03 | 312 | |
| lukofsky | 1:df1ae6d3fd03 | 313 | spi_abort_asynch(&_spi); |
| lukofsky | 1:df1ae6d3fd03 | 314 | |
| lukofsky | 1:df1ae6d3fd03 | 315 | unlock_deep_sleep(); |
| lukofsky | 1:df1ae6d3fd03 | 316 | |
| lukofsky | 1:df1ae6d3fd03 | 317 | #if TRANSACTION_QUEUE_SIZE_SPI |
| lukofsky | 1:df1ae6d3fd03 | 318 | |
| lukofsky | 1:df1ae6d3fd03 | 319 | dequeue_transaction(); |
| lukofsky | 1:df1ae6d3fd03 | 320 | |
| lukofsky | 1:df1ae6d3fd03 | 321 | #endif |
| lukofsky | 1:df1ae6d3fd03 | 322 | |
| lukofsky | 1:df1ae6d3fd03 | 323 | } |
| lukofsky | 1:df1ae6d3fd03 | 324 | |
| lukofsky | 1:df1ae6d3fd03 | 325 | |
| lukofsky | 1:df1ae6d3fd03 | 326 | |
| lukofsky | 1:df1ae6d3fd03 | 327 | |
| lukofsky | 1:df1ae6d3fd03 | 328 | |
| lukofsky | 1:df1ae6d3fd03 | 329 | void SPI::clear_transfer_buffer() |
| lukofsky | 1:df1ae6d3fd03 | 330 | |
| lukofsky | 1:df1ae6d3fd03 | 331 | { |
| lukofsky | 1:df1ae6d3fd03 | 332 | |
| lukofsky | 1:df1ae6d3fd03 | 333 | #if TRANSACTION_QUEUE_SIZE_SPI |
| lukofsky | 1:df1ae6d3fd03 | 334 | |
| lukofsky | 1:df1ae6d3fd03 | 335 | _transaction_buffer.reset(); |
| lukofsky | 1:df1ae6d3fd03 | 336 | |
| lukofsky | 1:df1ae6d3fd03 | 337 | #endif |
| lukofsky | 1:df1ae6d3fd03 | 338 | |
| lukofsky | 1:df1ae6d3fd03 | 339 | } |
| lukofsky | 1:df1ae6d3fd03 | 340 | |
| lukofsky | 1:df1ae6d3fd03 | 341 | |
| lukofsky | 1:df1ae6d3fd03 | 342 | |
| lukofsky | 1:df1ae6d3fd03 | 343 | void SPI::abort_all_transfers() |
| lukofsky | 1:df1ae6d3fd03 | 344 | |
| lukofsky | 1:df1ae6d3fd03 | 345 | { |
| lukofsky | 1:df1ae6d3fd03 | 346 | |
| lukofsky | 1:df1ae6d3fd03 | 347 | clear_transfer_buffer(); |
| lukofsky | 1:df1ae6d3fd03 | 348 | |
| lukofsky | 1:df1ae6d3fd03 | 349 | abort_transfer(); |
| lukofsky | 1:df1ae6d3fd03 | 350 | |
| lukofsky | 1:df1ae6d3fd03 | 351 | } |
| lukofsky | 1:df1ae6d3fd03 | 352 | |
| lukofsky | 1:df1ae6d3fd03 | 353 | |
| lukofsky | 1:df1ae6d3fd03 | 354 | |
| lukofsky | 1:df1ae6d3fd03 | 355 | int SPI::set_dma_usage(DMAUsage usage) |
| lukofsky | 1:df1ae6d3fd03 | 356 | |
| lukofsky | 1:df1ae6d3fd03 | 357 | { |
| lukofsky | 1:df1ae6d3fd03 | 358 | |
| lukofsky | 1:df1ae6d3fd03 | 359 | if (spi_active(&_spi)) { |
| lukofsky | 1:df1ae6d3fd03 | 360 | |
| lukofsky | 1:df1ae6d3fd03 | 361 | return -1; |
| lukofsky | 1:df1ae6d3fd03 | 362 | |
| lukofsky | 1:df1ae6d3fd03 | 363 | } |
| lukofsky | 1:df1ae6d3fd03 | 364 | |
| lukofsky | 1:df1ae6d3fd03 | 365 | _usage = usage; |
| lukofsky | 1:df1ae6d3fd03 | 366 | |
| lukofsky | 1:df1ae6d3fd03 | 367 | return 0; |
| lukofsky | 1:df1ae6d3fd03 | 368 | |
| lukofsky | 1:df1ae6d3fd03 | 369 | } |
| lukofsky | 1:df1ae6d3fd03 | 370 | |
| lukofsky | 1:df1ae6d3fd03 | 371 | |
| lukofsky | 1:df1ae6d3fd03 | 372 | |
| lukofsky | 1:df1ae6d3fd03 | 373 | int SPI::queue_transfer(const void *tx_buffer, int tx_length, void *rx_buffer, int rx_length, unsigned char bit_width, const event_callback_t &callback, int event) |
| lukofsky | 1:df1ae6d3fd03 | 374 | |
| lukofsky | 1:df1ae6d3fd03 | 375 | { |
| lukofsky | 1:df1ae6d3fd03 | 376 | |
| lukofsky | 1:df1ae6d3fd03 | 377 | #if TRANSACTION_QUEUE_SIZE_SPI |
| lukofsky | 1:df1ae6d3fd03 | 378 | |
| lukofsky | 1:df1ae6d3fd03 | 379 | transaction_t t; |
| lukofsky | 1:df1ae6d3fd03 | 380 | |
| lukofsky | 1:df1ae6d3fd03 | 381 | |
| lukofsky | 1:df1ae6d3fd03 | 382 | |
| lukofsky | 1:df1ae6d3fd03 | 383 | t.tx_buffer = const_cast<void *>(tx_buffer); |
| lukofsky | 1:df1ae6d3fd03 | 384 | |
| lukofsky | 1:df1ae6d3fd03 | 385 | t.tx_length = tx_length; |
| lukofsky | 1:df1ae6d3fd03 | 386 | |
| lukofsky | 1:df1ae6d3fd03 | 387 | t.rx_buffer = rx_buffer; |
| lukofsky | 1:df1ae6d3fd03 | 388 | |
| lukofsky | 1:df1ae6d3fd03 | 389 | t.rx_length = rx_length; |
| lukofsky | 1:df1ae6d3fd03 | 390 | |
| lukofsky | 1:df1ae6d3fd03 | 391 | t.event = event; |
| lukofsky | 1:df1ae6d3fd03 | 392 | |
| lukofsky | 1:df1ae6d3fd03 | 393 | t.callback = callback; |
| lukofsky | 1:df1ae6d3fd03 | 394 | |
| lukofsky | 1:df1ae6d3fd03 | 395 | t.width = bit_width; |
| lukofsky | 1:df1ae6d3fd03 | 396 | |
| lukofsky | 1:df1ae6d3fd03 | 397 | Transaction<SPI> transaction(this, t); |
| lukofsky | 1:df1ae6d3fd03 | 398 | |
| lukofsky | 1:df1ae6d3fd03 | 399 | if (_transaction_buffer.full()) { |
| lukofsky | 1:df1ae6d3fd03 | 400 | |
| lukofsky | 1:df1ae6d3fd03 | 401 | return -1; // the buffer is full |
| lukofsky | 1:df1ae6d3fd03 | 402 | |
| lukofsky | 1:df1ae6d3fd03 | 403 | } else { |
| lukofsky | 1:df1ae6d3fd03 | 404 | |
| lukofsky | 1:df1ae6d3fd03 | 405 | core_util_critical_section_enter(); |
| lukofsky | 1:df1ae6d3fd03 | 406 | |
| lukofsky | 1:df1ae6d3fd03 | 407 | _transaction_buffer.push(transaction); |
| lukofsky | 1:df1ae6d3fd03 | 408 | |
| lukofsky | 1:df1ae6d3fd03 | 409 | if (!spi_active(&_spi)) { |
| lukofsky | 1:df1ae6d3fd03 | 410 | |
| lukofsky | 1:df1ae6d3fd03 | 411 | dequeue_transaction(); |
| lukofsky | 1:df1ae6d3fd03 | 412 | |
| lukofsky | 1:df1ae6d3fd03 | 413 | } |
| lukofsky | 1:df1ae6d3fd03 | 414 | |
| lukofsky | 1:df1ae6d3fd03 | 415 | core_util_critical_section_exit(); |
| lukofsky | 1:df1ae6d3fd03 | 416 | |
| lukofsky | 1:df1ae6d3fd03 | 417 | return 0; |
| lukofsky | 1:df1ae6d3fd03 | 418 | |
| lukofsky | 1:df1ae6d3fd03 | 419 | } |
| lukofsky | 1:df1ae6d3fd03 | 420 | |
| lukofsky | 1:df1ae6d3fd03 | 421 | #else |
| lukofsky | 1:df1ae6d3fd03 | 422 | |
| lukofsky | 1:df1ae6d3fd03 | 423 | return -1; |
| lukofsky | 1:df1ae6d3fd03 | 424 | |
| lukofsky | 1:df1ae6d3fd03 | 425 | #endif |
| lukofsky | 1:df1ae6d3fd03 | 426 | |
| lukofsky | 1:df1ae6d3fd03 | 427 | } |
| lukofsky | 1:df1ae6d3fd03 | 428 | |
| lukofsky | 1:df1ae6d3fd03 | 429 | |
| lukofsky | 1:df1ae6d3fd03 | 430 | |
| lukofsky | 1:df1ae6d3fd03 | 431 | void SPI::start_transfer(const void *tx_buffer, int tx_length, void *rx_buffer, int rx_length, unsigned char bit_width, const event_callback_t &callback, int event) |
| lukofsky | 1:df1ae6d3fd03 | 432 | |
| lukofsky | 1:df1ae6d3fd03 | 433 | { |
| lukofsky | 1:df1ae6d3fd03 | 434 | |
| lukofsky | 1:df1ae6d3fd03 | 435 | lock_deep_sleep(); |
| lukofsky | 1:df1ae6d3fd03 | 436 | |
| lukofsky | 1:df1ae6d3fd03 | 437 | _acquire(); |
| lukofsky | 1:df1ae6d3fd03 | 438 | |
| lukofsky | 1:df1ae6d3fd03 | 439 | _callback = callback; |
| lukofsky | 1:df1ae6d3fd03 | 440 | |
| lukofsky | 1:df1ae6d3fd03 | 441 | _irq.callback(&SPI::irq_handler_asynch); |
| lukofsky | 1:df1ae6d3fd03 | 442 | |
| lukofsky | 1:df1ae6d3fd03 | 443 | spi_master_transfer(&_spi, tx_buffer, tx_length, rx_buffer, rx_length, bit_width, _irq.entry(), event, _usage); |
| lukofsky | 1:df1ae6d3fd03 | 444 | |
| lukofsky | 1:df1ae6d3fd03 | 445 | } |
| lukofsky | 1:df1ae6d3fd03 | 446 | |
| lukofsky | 1:df1ae6d3fd03 | 447 | |
| lukofsky | 1:df1ae6d3fd03 | 448 | |
| lukofsky | 1:df1ae6d3fd03 | 449 | void SPI::lock_deep_sleep() |
| lukofsky | 1:df1ae6d3fd03 | 450 | |
| lukofsky | 1:df1ae6d3fd03 | 451 | { |
| lukofsky | 1:df1ae6d3fd03 | 452 | |
| lukofsky | 1:df1ae6d3fd03 | 453 | if (_deep_sleep_locked == false) { |
| lukofsky | 1:df1ae6d3fd03 | 454 | |
| lukofsky | 1:df1ae6d3fd03 | 455 | sleep_manager_lock_deep_sleep(); |
| lukofsky | 1:df1ae6d3fd03 | 456 | |
| lukofsky | 1:df1ae6d3fd03 | 457 | _deep_sleep_locked = true; |
| lukofsky | 1:df1ae6d3fd03 | 458 | |
| lukofsky | 1:df1ae6d3fd03 | 459 | } |
| lukofsky | 1:df1ae6d3fd03 | 460 | |
| lukofsky | 1:df1ae6d3fd03 | 461 | } |
| lukofsky | 1:df1ae6d3fd03 | 462 | |
| lukofsky | 1:df1ae6d3fd03 | 463 | |
| lukofsky | 1:df1ae6d3fd03 | 464 | |
| lukofsky | 1:df1ae6d3fd03 | 465 | void SPI::unlock_deep_sleep() |
| lukofsky | 1:df1ae6d3fd03 | 466 | |
| lukofsky | 1:df1ae6d3fd03 | 467 | { |
| lukofsky | 1:df1ae6d3fd03 | 468 | |
| lukofsky | 1:df1ae6d3fd03 | 469 | if (_deep_sleep_locked == true) { |
| lukofsky | 1:df1ae6d3fd03 | 470 | |
| lukofsky | 1:df1ae6d3fd03 | 471 | sleep_manager_unlock_deep_sleep(); |
| lukofsky | 1:df1ae6d3fd03 | 472 | |
| lukofsky | 1:df1ae6d3fd03 | 473 | _deep_sleep_locked = false; |
| lukofsky | 1:df1ae6d3fd03 | 474 | |
| lukofsky | 1:df1ae6d3fd03 | 475 | } |
| lukofsky | 1:df1ae6d3fd03 | 476 | |
| lukofsky | 1:df1ae6d3fd03 | 477 | } |
| lukofsky | 1:df1ae6d3fd03 | 478 | |
| lukofsky | 1:df1ae6d3fd03 | 479 | |
| lukofsky | 1:df1ae6d3fd03 | 480 | |
| lukofsky | 1:df1ae6d3fd03 | 481 | #if TRANSACTION_QUEUE_SIZE_SPI |
| lukofsky | 1:df1ae6d3fd03 | 482 | |
| lukofsky | 1:df1ae6d3fd03 | 483 | |
| lukofsky | 1:df1ae6d3fd03 | 484 | |
| lukofsky | 1:df1ae6d3fd03 | 485 | void SPI::start_transaction(transaction_t *data) |
| lukofsky | 1:df1ae6d3fd03 | 486 | |
| lukofsky | 1:df1ae6d3fd03 | 487 | { |
| lukofsky | 1:df1ae6d3fd03 | 488 | |
| lukofsky | 1:df1ae6d3fd03 | 489 | start_transfer(data->tx_buffer, data->tx_length, data->rx_buffer, data->rx_length, data->width, data->callback, data->event); |
| lukofsky | 1:df1ae6d3fd03 | 490 | |
| lukofsky | 1:df1ae6d3fd03 | 491 | } |
| lukofsky | 1:df1ae6d3fd03 | 492 | |
| lukofsky | 1:df1ae6d3fd03 | 493 | |
| lukofsky | 1:df1ae6d3fd03 | 494 | |
| lukofsky | 1:df1ae6d3fd03 | 495 | void SPI::dequeue_transaction() |
| lukofsky | 1:df1ae6d3fd03 | 496 | |
| lukofsky | 1:df1ae6d3fd03 | 497 | { |
| lukofsky | 1:df1ae6d3fd03 | 498 | |
| lukofsky | 1:df1ae6d3fd03 | 499 | Transaction<SPI> t; |
| lukofsky | 1:df1ae6d3fd03 | 500 | |
| lukofsky | 1:df1ae6d3fd03 | 501 | if (_transaction_buffer.pop(t)) { |
| lukofsky | 1:df1ae6d3fd03 | 502 | |
| lukofsky | 1:df1ae6d3fd03 | 503 | SPI *obj = t.get_object(); |
| lukofsky | 1:df1ae6d3fd03 | 504 | |
| lukofsky | 1:df1ae6d3fd03 | 505 | transaction_t *data = t.get_transaction(); |
| lukofsky | 1:df1ae6d3fd03 | 506 | |
| lukofsky | 1:df1ae6d3fd03 | 507 | obj->start_transaction(data); |
| lukofsky | 1:df1ae6d3fd03 | 508 | |
| lukofsky | 1:df1ae6d3fd03 | 509 | } |
| lukofsky | 1:df1ae6d3fd03 | 510 | |
| lukofsky | 1:df1ae6d3fd03 | 511 | } |
| lukofsky | 1:df1ae6d3fd03 | 512 | |
| lukofsky | 1:df1ae6d3fd03 | 513 | |
| lukofsky | 1:df1ae6d3fd03 | 514 | |
| lukofsky | 1:df1ae6d3fd03 | 515 | #endif |
| lukofsky | 1:df1ae6d3fd03 | 516 | |
| lukofsky | 1:df1ae6d3fd03 | 517 | |
| lukofsky | 1:df1ae6d3fd03 | 518 | |
| lukofsky | 1:df1ae6d3fd03 | 519 | void SPI::irq_handler_asynch(void) |
| lukofsky | 1:df1ae6d3fd03 | 520 | |
| lukofsky | 1:df1ae6d3fd03 | 521 | { |
| lukofsky | 1:df1ae6d3fd03 | 522 | |
| lukofsky | 1:df1ae6d3fd03 | 523 | int event = spi_irq_handler_asynch(&_spi); |
| lukofsky | 1:df1ae6d3fd03 | 524 | |
| lukofsky | 1:df1ae6d3fd03 | 525 | if (_callback && (event & SPI_EVENT_ALL)) { |
| lukofsky | 1:df1ae6d3fd03 | 526 | |
| lukofsky | 1:df1ae6d3fd03 | 527 | unlock_deep_sleep(); |
| lukofsky | 1:df1ae6d3fd03 | 528 | |
| lukofsky | 1:df1ae6d3fd03 | 529 | _callback.call(event & SPI_EVENT_ALL); |
| lukofsky | 1:df1ae6d3fd03 | 530 | |
| lukofsky | 1:df1ae6d3fd03 | 531 | } |
| lukofsky | 1:df1ae6d3fd03 | 532 | |
| lukofsky | 1:df1ae6d3fd03 | 533 | #if TRANSACTION_QUEUE_SIZE_SPI |
| lukofsky | 1:df1ae6d3fd03 | 534 | |
| lukofsky | 1:df1ae6d3fd03 | 535 | if (event & (SPI_EVENT_ALL | SPI_EVENT_INTERNAL_TRANSFER_COMPLETE)) { |
| lukofsky | 1:df1ae6d3fd03 | 536 | |
| lukofsky | 1:df1ae6d3fd03 | 537 | // SPI peripheral is free (event happened), dequeue transaction |
| lukofsky | 1:df1ae6d3fd03 | 538 | |
| lukofsky | 1:df1ae6d3fd03 | 539 | dequeue_transaction(); |
| lukofsky | 1:df1ae6d3fd03 | 540 | |
| lukofsky | 1:df1ae6d3fd03 | 541 | } |
| lukofsky | 1:df1ae6d3fd03 | 542 | |
| lukofsky | 1:df1ae6d3fd03 | 543 | #endif |
| lukofsky | 1:df1ae6d3fd03 | 544 | |
| lukofsky | 1:df1ae6d3fd03 | 545 | } |
| lukofsky | 1:df1ae6d3fd03 | 546 | |
| lukofsky | 1:df1ae6d3fd03 | 547 | |
| lukofsky | 1:df1ae6d3fd03 | 548 | |
| lukofsky | 1:df1ae6d3fd03 | 549 | #endif |
| lukofsky | 1:df1ae6d3fd03 | 550 | |
| lukofsky | 1:df1ae6d3fd03 | 551 | |
| lukofsky | 1:df1ae6d3fd03 | 552 | |
| lukofsky | 1:df1ae6d3fd03 | 553 | } // namespace mbed |
| lukofsky | 1:df1ae6d3fd03 | 554 | |
| lukofsky | 1:df1ae6d3fd03 | 555 | |
| lukofsky | 1:df1ae6d3fd03 | 556 | |
| lukofsky | 1:df1ae6d3fd03 | 557 | #endif |