STMicroelectronics' implementation of an I2S driver, also including DMA support.
Dependents: temp X_NUCLEO_CCA01M1 X_NUCLEO_CCA01M1 X_NUCLEO_CCA02M1
Platform compatibility
This driver has been designed to support a wide range of the Nucleo F4 Family of platforms and MCUs, but not all members of this family support I2S
and/or some of the members might require slight modifications to the sources of this driver in order to make it work on those.
This driver has for now been tested only with the following platforms:
drivers/I2S.cpp@11:50562a5f8a93, 2016-12-22 (annotated)
- Committer:
- Wolfgang Betz
- Date:
- Thu Dec 22 14:39:28 2016 +0100
- Revision:
- 11:50562a5f8a93
- Parent:
- 10:1a612c2e4a85
- Child:
- 16:04e1abb4cca3
Correct synchronization
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
Wolfgang Betz |
0:752e74bf5ef1 | 1 | #include "drivers/I2S.h" |
Wolfgang Betz |
0:752e74bf5ef1 | 2 | #include "platform/critical.h" |
Wolfgang Betz |
0:752e74bf5ef1 | 3 | #include "platform/mbed_assert.h" |
Wolfgang Betz |
0:752e74bf5ef1 | 4 | |
Wolfgang Betz |
0:752e74bf5ef1 | 5 | #if DEVICE_I2S |
Wolfgang Betz |
0:752e74bf5ef1 | 6 | |
Wolfgang Betz |
0:752e74bf5ef1 | 7 | namespace mbed { |
Wolfgang Betz |
0:752e74bf5ef1 | 8 | |
Wolfgang Betz |
0:752e74bf5ef1 | 9 | /* betzw - WAS |
Wolfgang Betz |
9:c4c2240e06d6 | 10 | #if TRANSACTION_QUEUE_SIZE_I2S |
Wolfgang Betz |
9:c4c2240e06d6 | 11 | CircularBuffer<Transaction<I2S>, TRANSACTION_QUEUE_SIZE_I2S> I2S::_transaction_buffer; |
Wolfgang Betz |
9:c4c2240e06d6 | 12 | #endif |
Wolfgang Betz |
0:752e74bf5ef1 | 13 | */ |
Wolfgang Betz |
0:752e74bf5ef1 | 14 | |
Wolfgang Betz |
10:1a612c2e4a85 | 15 | I2S* I2S::_owner = NULL; |
Wolfgang Betz |
10:1a612c2e4a85 | 16 | SingletonPtr<PlatformMutex> I2S::_mutex; // intentional class level lock! |
Wolfgang Betz |
0:752e74bf5ef1 | 17 | |
Wolfgang Betz |
10:1a612c2e4a85 | 18 | events::EventQueue I2S::i2s_bh_queue; |
Wolfgang Betz |
0:752e74bf5ef1 | 19 | |
Wolfgang Betz |
10:1a612c2e4a85 | 20 | void I2S::lock() { |
Wolfgang Betz |
10:1a612c2e4a85 | 21 | #if defined(NDEBUG) || !defined(MBED_CONF_RTOS_PRESENT) |
Wolfgang Betz |
10:1a612c2e4a85 | 22 | _mutex->lock(); // intentional class level lock! |
Wolfgang Betz |
0:752e74bf5ef1 | 23 | #else |
Wolfgang Betz |
10:1a612c2e4a85 | 24 | osStatus ret = _mutex->lock(); // intentional class level lock! |
Wolfgang Betz |
10:1a612c2e4a85 | 25 | MBED_ASSERT(ret == osOK); |
Wolfgang Betz |
0:752e74bf5ef1 | 26 | #endif |
Wolfgang Betz |
10:1a612c2e4a85 | 27 | } |
Wolfgang Betz |
10:1a612c2e4a85 | 28 | |
Wolfgang Betz |
10:1a612c2e4a85 | 29 | void I2S::unlock() { |
Wolfgang Betz |
10:1a612c2e4a85 | 30 | #if defined(NDEBUG) || !defined(MBED_CONF_RTOS_PRESENT) |
Wolfgang Betz |
10:1a612c2e4a85 | 31 | _mutex->unlock(); // intentional class level lock! |
Wolfgang Betz |
10:1a612c2e4a85 | 32 | #else |
Wolfgang Betz |
10:1a612c2e4a85 | 33 | osStatus ret = _mutex->unlock(); // intentional class level lock! |
Wolfgang Betz |
10:1a612c2e4a85 | 34 | MBED_ASSERT(ret == osOK); |
Wolfgang Betz |
10:1a612c2e4a85 | 35 | #endif |
Wolfgang Betz |
10:1a612c2e4a85 | 36 | } |
Wolfgang Betz |
0:752e74bf5ef1 | 37 | |
Wolfgang Betz |
10:1a612c2e4a85 | 38 | I2S::I2S(PinName dpin, PinName clk, PinName wsel, PinName fdpin, PinName mck) : |
Wolfgang Betz |
10:1a612c2e4a85 | 39 | _i2s(), |
Wolfgang Betz |
10:1a612c2e4a85 | 40 | _irq_tx(this), _irq_rx(this), |
Wolfgang Betz |
10:1a612c2e4a85 | 41 | _priority(MEDIUM), |
Wolfgang Betz |
10:1a612c2e4a85 | 42 | _dbits(16), |
Wolfgang Betz |
10:1a612c2e4a85 | 43 | _fbits(16), |
Wolfgang Betz |
10:1a612c2e4a85 | 44 | _polarity(0), |
Wolfgang Betz |
10:1a612c2e4a85 | 45 | _protocol(PHILIPS), |
Wolfgang Betz |
10:1a612c2e4a85 | 46 | _mode(MASTER_TX), |
Wolfgang Betz |
10:1a612c2e4a85 | 47 | _circular(false), |
Wolfgang Betz |
10:1a612c2e4a85 | 48 | _hz(44100) { |
Wolfgang Betz |
10:1a612c2e4a85 | 49 | lock(); |
Wolfgang Betz |
10:1a612c2e4a85 | 50 | /* Init instance */ |
Wolfgang Betz |
10:1a612c2e4a85 | 51 | i2s_init(&_i2s, dpin, clk, wsel, fdpin, mck, _mode); |
Wolfgang Betz |
10:1a612c2e4a85 | 52 | acquire(); |
Wolfgang Betz |
10:1a612c2e4a85 | 53 | unlock(); |
Wolfgang Betz |
10:1a612c2e4a85 | 54 | } |
Wolfgang Betz |
0:752e74bf5ef1 | 55 | |
Wolfgang Betz |
10:1a612c2e4a85 | 56 | int I2S::format(int dbits, int fbits, int polarity) { |
Wolfgang Betz |
10:1a612c2e4a85 | 57 | lock(); |
Wolfgang Betz |
10:1a612c2e4a85 | 58 | if (i2s_active(&_i2s)) { |
Wolfgang Betz |
9:c4c2240e06d6 | 59 | unlock(); |
Wolfgang Betz |
10:1a612c2e4a85 | 60 | return -1; |
Wolfgang Betz |
0:752e74bf5ef1 | 61 | } |
Wolfgang Betz |
10:1a612c2e4a85 | 62 | _dbits = dbits; |
Wolfgang Betz |
10:1a612c2e4a85 | 63 | _fbits = fbits; |
Wolfgang Betz |
10:1a612c2e4a85 | 64 | _polarity = polarity; |
Wolfgang Betz |
10:1a612c2e4a85 | 65 | I2S::_owner = NULL; // Not that elegant, but works. rmeyer |
Wolfgang Betz |
10:1a612c2e4a85 | 66 | acquire(); |
Wolfgang Betz |
10:1a612c2e4a85 | 67 | unlock(); |
Wolfgang Betz |
10:1a612c2e4a85 | 68 | return 0; |
Wolfgang Betz |
10:1a612c2e4a85 | 69 | } |
Wolfgang Betz |
0:752e74bf5ef1 | 70 | |
Wolfgang Betz |
10:1a612c2e4a85 | 71 | int I2S::audio_frequency(unsigned int hz) { |
Wolfgang Betz |
10:1a612c2e4a85 | 72 | lock(); |
Wolfgang Betz |
10:1a612c2e4a85 | 73 | if (i2s_active(&_i2s)) { |
Wolfgang Betz |
9:c4c2240e06d6 | 74 | unlock(); |
Wolfgang Betz |
10:1a612c2e4a85 | 75 | return -1; |
Wolfgang Betz |
0:752e74bf5ef1 | 76 | } |
Wolfgang Betz |
10:1a612c2e4a85 | 77 | _hz = hz; |
Wolfgang Betz |
10:1a612c2e4a85 | 78 | I2S::_owner = NULL; // Not that elegant, but works. rmeyer |
Wolfgang Betz |
10:1a612c2e4a85 | 79 | acquire(); |
Wolfgang Betz |
10:1a612c2e4a85 | 80 | unlock(); |
Wolfgang Betz |
10:1a612c2e4a85 | 81 | return 0; |
Wolfgang Betz |
10:1a612c2e4a85 | 82 | } |
Wolfgang Betz |
0:752e74bf5ef1 | 83 | |
Wolfgang Betz |
10:1a612c2e4a85 | 84 | int I2S::set_protocol(i2s_bitorder_t protocol) { |
Wolfgang Betz |
10:1a612c2e4a85 | 85 | lock(); |
Wolfgang Betz |
10:1a612c2e4a85 | 86 | if (i2s_active(&_i2s)) { |
Wolfgang Betz |
9:c4c2240e06d6 | 87 | unlock(); |
Wolfgang Betz |
10:1a612c2e4a85 | 88 | return -1; |
Wolfgang Betz |
0:752e74bf5ef1 | 89 | } |
Wolfgang Betz |
10:1a612c2e4a85 | 90 | _protocol = protocol; |
Wolfgang Betz |
10:1a612c2e4a85 | 91 | I2S::_owner = NULL; // Not that elegant, but works. rmeyer |
Wolfgang Betz |
10:1a612c2e4a85 | 92 | acquire(); |
Wolfgang Betz |
10:1a612c2e4a85 | 93 | unlock(); |
Wolfgang Betz |
10:1a612c2e4a85 | 94 | return 0; |
Wolfgang Betz |
10:1a612c2e4a85 | 95 | } |
Wolfgang Betz |
0:752e74bf5ef1 | 96 | |
Wolfgang Betz |
10:1a612c2e4a85 | 97 | int I2S::set_mode(i2s_mode_t mode, bool circular) { |
Wolfgang Betz |
10:1a612c2e4a85 | 98 | lock(); |
Wolfgang Betz |
10:1a612c2e4a85 | 99 | if (i2s_active(&_i2s)) { |
Wolfgang Betz |
9:c4c2240e06d6 | 100 | unlock(); |
Wolfgang Betz |
10:1a612c2e4a85 | 101 | return -1; |
Wolfgang Betz |
10:1a612c2e4a85 | 102 | } |
Wolfgang Betz |
10:1a612c2e4a85 | 103 | _mode = mode; |
Wolfgang Betz |
10:1a612c2e4a85 | 104 | _circular = circular; |
Wolfgang Betz |
10:1a612c2e4a85 | 105 | I2S::_owner = NULL; // Not that elegant, but works. rmeyer |
Wolfgang Betz |
10:1a612c2e4a85 | 106 | acquire(); |
Wolfgang Betz |
10:1a612c2e4a85 | 107 | unlock(); |
Wolfgang Betz |
10:1a612c2e4a85 | 108 | return 0; |
Wolfgang Betz |
10:1a612c2e4a85 | 109 | } |
Wolfgang Betz |
10:1a612c2e4a85 | 110 | |
Wolfgang Betz |
10:1a612c2e4a85 | 111 | int I2S::harmonize(I2S &dev_i2s_1, I2S &dev_i2s_2) { |
Wolfgang Betz |
10:1a612c2e4a85 | 112 | dev_i2s_1.lock(); |
Wolfgang Betz |
10:1a612c2e4a85 | 113 | if (i2s_active(&dev_i2s_1._i2s)) { |
Wolfgang Betz |
10:1a612c2e4a85 | 114 | dev_i2s_1.unlock(); |
Wolfgang Betz |
10:1a612c2e4a85 | 115 | return -1; |
Wolfgang Betz |
0:752e74bf5ef1 | 116 | } |
Wolfgang Betz |
9:c4c2240e06d6 | 117 | |
Wolfgang Betz |
10:1a612c2e4a85 | 118 | dev_i2s_2.lock(); |
Wolfgang Betz |
10:1a612c2e4a85 | 119 | if (i2s_active(&dev_i2s_2._i2s)) { |
Wolfgang Betz |
11:50562a5f8a93 | 120 | dev_i2s_2.unlock(); |
Wolfgang Betz |
9:c4c2240e06d6 | 121 | dev_i2s_1.unlock(); |
Wolfgang Betz |
10:1a612c2e4a85 | 122 | return -1; |
Wolfgang Betz |
9:c4c2240e06d6 | 123 | } |
Wolfgang Betz |
9:c4c2240e06d6 | 124 | |
Wolfgang Betz |
10:1a612c2e4a85 | 125 | uint32_t hz1 = dev_i2s_1._hz; |
Wolfgang Betz |
10:1a612c2e4a85 | 126 | uint32_t hz2 = dev_i2s_2._hz; |
Wolfgang Betz |
10:1a612c2e4a85 | 127 | int8_t ret = i2s_harmonize(&dev_i2s_1._i2s, &hz1, &dev_i2s_2._i2s, &hz2); |
Wolfgang Betz |
0:752e74bf5ef1 | 128 | |
Wolfgang Betz |
10:1a612c2e4a85 | 129 | if(ret == 0) { |
Wolfgang Betz |
10:1a612c2e4a85 | 130 | dev_i2s_1.audio_frequency(hz1); |
Wolfgang Betz |
10:1a612c2e4a85 | 131 | dev_i2s_2.audio_frequency(hz2); |
Wolfgang Betz |
9:c4c2240e06d6 | 132 | } |
Wolfgang Betz |
0:752e74bf5ef1 | 133 | |
Wolfgang Betz |
10:1a612c2e4a85 | 134 | dev_i2s_2.unlock(); |
Wolfgang Betz |
10:1a612c2e4a85 | 135 | dev_i2s_1.unlock(); |
Wolfgang Betz |
10:1a612c2e4a85 | 136 | |
Wolfgang Betz |
10:1a612c2e4a85 | 137 | return ret; |
Wolfgang Betz |
10:1a612c2e4a85 | 138 | } |
Wolfgang Betz |
10:1a612c2e4a85 | 139 | |
Wolfgang Betz |
10:1a612c2e4a85 | 140 | void I2S::abort_transfer() |
Wolfgang Betz |
10:1a612c2e4a85 | 141 | { |
Wolfgang Betz |
10:1a612c2e4a85 | 142 | lock(); |
Wolfgang Betz |
10:1a612c2e4a85 | 143 | i2s_abort_asynch(&_i2s); |
Wolfgang Betz |
10:1a612c2e4a85 | 144 | #if TRANSACTION_QUEUE_SIZE_I2S |
Wolfgang Betz |
10:1a612c2e4a85 | 145 | dequeue_transaction(); |
Wolfgang Betz |
10:1a612c2e4a85 | 146 | #endif |
Wolfgang Betz |
10:1a612c2e4a85 | 147 | unlock(); |
Wolfgang Betz |
10:1a612c2e4a85 | 148 | } |
Wolfgang Betz |
10:1a612c2e4a85 | 149 | |
Wolfgang Betz |
0:752e74bf5ef1 | 150 | |
Wolfgang Betz |
10:1a612c2e4a85 | 151 | void I2S::clear_transfer_buffer() |
Wolfgang Betz |
10:1a612c2e4a85 | 152 | { |
Wolfgang Betz |
10:1a612c2e4a85 | 153 | #if TRANSACTION_QUEUE_SIZE_I2S |
Wolfgang Betz |
10:1a612c2e4a85 | 154 | lock(); |
Wolfgang Betz |
10:1a612c2e4a85 | 155 | _transaction_buffer.reset(); |
Wolfgang Betz |
10:1a612c2e4a85 | 156 | unlock(); |
Wolfgang Betz |
10:1a612c2e4a85 | 157 | #endif |
Wolfgang Betz |
10:1a612c2e4a85 | 158 | } |
Wolfgang Betz |
0:752e74bf5ef1 | 159 | |
Wolfgang Betz |
10:1a612c2e4a85 | 160 | void I2S::abort_all_transfers() |
Wolfgang Betz |
10:1a612c2e4a85 | 161 | { |
Wolfgang Betz |
10:1a612c2e4a85 | 162 | lock(); |
Wolfgang Betz |
10:1a612c2e4a85 | 163 | clear_transfer_buffer(); |
Wolfgang Betz |
10:1a612c2e4a85 | 164 | abort_transfer(); |
Wolfgang Betz |
10:1a612c2e4a85 | 165 | unlock(); |
Wolfgang Betz |
10:1a612c2e4a85 | 166 | } |
Wolfgang Betz |
10:1a612c2e4a85 | 167 | |
Wolfgang Betz |
10:1a612c2e4a85 | 168 | int I2S::get_transfer_status() |
Wolfgang Betz |
10:1a612c2e4a85 | 169 | { |
Wolfgang Betz |
10:1a612c2e4a85 | 170 | lock(); |
Wolfgang Betz |
10:1a612c2e4a85 | 171 | if (i2s_active(&_i2s)) { |
Wolfgang Betz |
9:c4c2240e06d6 | 172 | unlock(); |
Wolfgang Betz |
10:1a612c2e4a85 | 173 | return -1; |
Wolfgang Betz |
0:752e74bf5ef1 | 174 | } |
Wolfgang Betz |
10:1a612c2e4a85 | 175 | unlock(); |
Wolfgang Betz |
10:1a612c2e4a85 | 176 | return 0; |
Wolfgang Betz |
10:1a612c2e4a85 | 177 | } |
Wolfgang Betz |
0:752e74bf5ef1 | 178 | |
Wolfgang Betz |
10:1a612c2e4a85 | 179 | unsigned int I2S::get_module() |
Wolfgang Betz |
10:1a612c2e4a85 | 180 | { |
Wolfgang Betz |
10:1a612c2e4a85 | 181 | return i2s_get_module(&_i2s); |
Wolfgang Betz |
10:1a612c2e4a85 | 182 | } |
Wolfgang Betz |
0:752e74bf5ef1 | 183 | |
Wolfgang Betz |
10:1a612c2e4a85 | 184 | int I2S::set_dma_priority(i2s_dma_prio_t prio) |
Wolfgang Betz |
10:1a612c2e4a85 | 185 | { |
Wolfgang Betz |
10:1a612c2e4a85 | 186 | lock(); |
Wolfgang Betz |
10:1a612c2e4a85 | 187 | if (i2s_active(&_i2s)) { |
Wolfgang Betz |
10:1a612c2e4a85 | 188 | unlock(); |
Wolfgang Betz |
10:1a612c2e4a85 | 189 | return -1; |
Wolfgang Betz |
10:1a612c2e4a85 | 190 | } |
Wolfgang Betz |
10:1a612c2e4a85 | 191 | _priority = prio; |
Wolfgang Betz |
10:1a612c2e4a85 | 192 | unlock(); |
Wolfgang Betz |
10:1a612c2e4a85 | 193 | return 0; |
Wolfgang Betz |
10:1a612c2e4a85 | 194 | } |
Wolfgang Betz |
10:1a612c2e4a85 | 195 | |
Wolfgang Betz |
10:1a612c2e4a85 | 196 | int I2S::queue_transfer(const void *tx_buffer, int tx_length, void *rx_buffer, int rx_length, const event_callback_t& callback, int event) |
Wolfgang Betz |
10:1a612c2e4a85 | 197 | { // betzw: MUST be called with lock held! |
Wolfgang Betz |
10:1a612c2e4a85 | 198 | #if TRANSACTION_QUEUE_SIZE_I2S |
Wolfgang Betz |
10:1a612c2e4a85 | 199 | transaction_t t; |
Wolfgang Betz |
10:1a612c2e4a85 | 200 | |
Wolfgang Betz |
10:1a612c2e4a85 | 201 | t.tx_buffer = const_cast<void *>(tx_buffer); |
Wolfgang Betz |
10:1a612c2e4a85 | 202 | t.tx_length = tx_length; |
Wolfgang Betz |
10:1a612c2e4a85 | 203 | t.rx_buffer = rx_buffer; |
Wolfgang Betz |
10:1a612c2e4a85 | 204 | t.rx_length = rx_length; |
Wolfgang Betz |
10:1a612c2e4a85 | 205 | t.event = event; |
Wolfgang Betz |
10:1a612c2e4a85 | 206 | t.callback = callback; |
Wolfgang Betz |
10:1a612c2e4a85 | 207 | t.width = 16; |
Wolfgang Betz |
10:1a612c2e4a85 | 208 | Transaction<I2S> transaction(this, t); |
Wolfgang Betz |
10:1a612c2e4a85 | 209 | core_util_critical_section_enter(); |
Wolfgang Betz |
10:1a612c2e4a85 | 210 | if (_transaction_buffer.full()) { |
Wolfgang Betz |
9:c4c2240e06d6 | 211 | core_util_critical_section_enter(); |
Wolfgang Betz |
10:1a612c2e4a85 | 212 | return -1; // the buffer is full |
Wolfgang Betz |
10:1a612c2e4a85 | 213 | } else { |
Wolfgang Betz |
10:1a612c2e4a85 | 214 | _transaction_buffer.push(transaction); |
Wolfgang Betz |
10:1a612c2e4a85 | 215 | core_util_critical_section_exit(); |
Wolfgang Betz |
10:1a612c2e4a85 | 216 | // betzw - seems to be redundant - WAS: dequeue_transaction(); |
Wolfgang Betz |
10:1a612c2e4a85 | 217 | return 0; |
Wolfgang Betz |
10:1a612c2e4a85 | 218 | } |
Wolfgang Betz |
9:c4c2240e06d6 | 219 | #else |
Wolfgang Betz |
10:1a612c2e4a85 | 220 | return -1; |
Wolfgang Betz |
9:c4c2240e06d6 | 221 | #endif |
Wolfgang Betz |
10:1a612c2e4a85 | 222 | } |
Wolfgang Betz |
0:752e74bf5ef1 | 223 | |
Wolfgang Betz |
0:752e74bf5ef1 | 224 | |
Wolfgang Betz |
9:c4c2240e06d6 | 225 | // ignore the fact that there are multiple physical i2s's, and always update if it wasn't us last |
Wolfgang Betz |
10:1a612c2e4a85 | 226 | void I2S::acquire() { // betzw: MUST be called with lock held! |
Wolfgang Betz |
10:1a612c2e4a85 | 227 | if (_owner != this) { |
Wolfgang Betz |
10:1a612c2e4a85 | 228 | i2s_format(&_i2s, _dbits, _fbits, _polarity); |
Wolfgang Betz |
10:1a612c2e4a85 | 229 | i2s_audio_frequency(&_i2s, _hz); |
Wolfgang Betz |
10:1a612c2e4a85 | 230 | i2s_set_protocol(&_i2s, _protocol); |
Wolfgang Betz |
10:1a612c2e4a85 | 231 | i2s_set_mode(&_i2s, _mode); |
Wolfgang Betz |
10:1a612c2e4a85 | 232 | _owner = this; |
Wolfgang Betz |
0:752e74bf5ef1 | 233 | } |
Wolfgang Betz |
10:1a612c2e4a85 | 234 | } |
Wolfgang Betz |
0:752e74bf5ef1 | 235 | |
Wolfgang Betz |
10:1a612c2e4a85 | 236 | void I2S::start_transfer(const void *tx_buffer, int tx_length, void *rx_buffer, int rx_length, |
Wolfgang Betz |
10:1a612c2e4a85 | 237 | const event_callback_t& callback, int event) |
Wolfgang Betz |
10:1a612c2e4a85 | 238 | { // betzw: MUST be called with lock held! |
Wolfgang Betz |
10:1a612c2e4a85 | 239 | acquire(); |
Wolfgang Betz |
10:1a612c2e4a85 | 240 | _callback = callback; |
Wolfgang Betz |
10:1a612c2e4a85 | 241 | _irq_tx.callback(&I2S::irq_handler_asynch_tx); |
Wolfgang Betz |
10:1a612c2e4a85 | 242 | _irq_rx.callback(&I2S::irq_handler_asynch_rx); |
Wolfgang Betz |
10:1a612c2e4a85 | 243 | i2s_transfer(&_i2s, |
Wolfgang Betz |
10:1a612c2e4a85 | 244 | const_cast<void *>(tx_buffer), tx_length, rx_buffer, rx_length, |
Wolfgang Betz |
10:1a612c2e4a85 | 245 | _circular, _priority, |
Wolfgang Betz |
10:1a612c2e4a85 | 246 | _irq_tx.entry(), _irq_rx.entry(), |
Wolfgang Betz |
10:1a612c2e4a85 | 247 | event); |
Wolfgang Betz |
10:1a612c2e4a85 | 248 | } |
Wolfgang Betz |
0:752e74bf5ef1 | 249 | |
Wolfgang Betz |
0:752e74bf5ef1 | 250 | #if TRANSACTION_QUEUE_SIZE_I2S |
Wolfgang Betz |
0:752e74bf5ef1 | 251 | |
Wolfgang Betz |
10:1a612c2e4a85 | 252 | void I2S::start_transaction(transaction_t *data) |
Wolfgang Betz |
10:1a612c2e4a85 | 253 | { // betzw: MUST be called with lock held! |
Wolfgang Betz |
10:1a612c2e4a85 | 254 | start_transfer(data->tx_buffer, data->tx_length, data->rx_buffer, data->rx_length, data->callback, data->event); |
Wolfgang Betz |
10:1a612c2e4a85 | 255 | } |
Wolfgang Betz |
0:752e74bf5ef1 | 256 | |
Wolfgang Betz |
10:1a612c2e4a85 | 257 | void I2S::dequeue_transaction() |
Wolfgang Betz |
10:1a612c2e4a85 | 258 | { |
Wolfgang Betz |
10:1a612c2e4a85 | 259 | lock(); |
Wolfgang Betz |
10:1a612c2e4a85 | 260 | if (!i2s_active(&_i2s)) { |
Wolfgang Betz |
10:1a612c2e4a85 | 261 | Transaction<I2S> t; |
Wolfgang Betz |
10:1a612c2e4a85 | 262 | if (_transaction_buffer.pop(t)) { |
Wolfgang Betz |
10:1a612c2e4a85 | 263 | I2S* obj = t.get_object(); |
Wolfgang Betz |
10:1a612c2e4a85 | 264 | transaction_t* data = t.get_transaction(); |
Wolfgang Betz |
10:1a612c2e4a85 | 265 | MBED_ASSERT(obj == this); // betzw: what if 'obj' is NOT equal to 'this'? |
Wolfgang Betz |
10:1a612c2e4a85 | 266 | obj->start_transaction(data); |
Wolfgang Betz |
9:c4c2240e06d6 | 267 | } |
Wolfgang Betz |
0:752e74bf5ef1 | 268 | } |
Wolfgang Betz |
10:1a612c2e4a85 | 269 | unlock(); |
Wolfgang Betz |
10:1a612c2e4a85 | 270 | } |
Wolfgang Betz |
0:752e74bf5ef1 | 271 | |
Wolfgang Betz |
0:752e74bf5ef1 | 272 | #endif |
Wolfgang Betz |
0:752e74bf5ef1 | 273 | |
Wolfgang Betz |
10:1a612c2e4a85 | 274 | void I2S::irq_handler_asynch_rx(void) |
Wolfgang Betz |
10:1a612c2e4a85 | 275 | { |
Wolfgang Betz |
10:1a612c2e4a85 | 276 | int event = i2s_irq_handler_asynch(&_i2s, I2S_RX_EVENT); |
Wolfgang Betz |
10:1a612c2e4a85 | 277 | if (_callback && (event & I2S_EVENT_ALL)) { |
Wolfgang Betz |
10:1a612c2e4a85 | 278 | I2sBhHandler::i2s_defer_function(_callback, event & I2S_EVENT_ALL); |
Wolfgang Betz |
10:1a612c2e4a85 | 279 | } |
Wolfgang Betz |
0:752e74bf5ef1 | 280 | #if TRANSACTION_QUEUE_SIZE_I2S |
Wolfgang Betz |
10:1a612c2e4a85 | 281 | if (event & I2S_EVENT_INTERNAL_TRANSFER_COMPLETE) { |
Wolfgang Betz |
10:1a612c2e4a85 | 282 | I2sBhHandler::i2s_defer_function(Callback<void()>(this, &I2S::dequeue_transaction)); |
Wolfgang Betz |
10:1a612c2e4a85 | 283 | } |
Wolfgang Betz |
0:752e74bf5ef1 | 284 | #endif |
Wolfgang Betz |
10:1a612c2e4a85 | 285 | } |
Davide Aliprandi |
4:21603d68bcf7 | 286 | |
Wolfgang Betz |
10:1a612c2e4a85 | 287 | void I2S::irq_handler_asynch_tx(void) |
Wolfgang Betz |
10:1a612c2e4a85 | 288 | { |
Wolfgang Betz |
10:1a612c2e4a85 | 289 | int event = i2s_irq_handler_asynch(&_i2s, I2S_TX_EVENT); |
Wolfgang Betz |
10:1a612c2e4a85 | 290 | if (_callback && (event & I2S_EVENT_ALL)) { |
Wolfgang Betz |
10:1a612c2e4a85 | 291 | I2sBhHandler::i2s_defer_function(_callback, event & I2S_EVENT_ALL); |
Wolfgang Betz |
10:1a612c2e4a85 | 292 | } |
Wolfgang Betz |
9:c4c2240e06d6 | 293 | #if TRANSACTION_QUEUE_SIZE_I2S |
Wolfgang Betz |
10:1a612c2e4a85 | 294 | if (event & I2S_EVENT_INTERNAL_TRANSFER_COMPLETE) { |
Wolfgang Betz |
10:1a612c2e4a85 | 295 | I2sBhHandler::i2s_defer_function(Callback<void()>(this, &I2S::dequeue_transaction)); |
Wolfgang Betz |
10:1a612c2e4a85 | 296 | } |
Wolfgang Betz |
9:c4c2240e06d6 | 297 | #endif |
Wolfgang Betz |
10:1a612c2e4a85 | 298 | } |
Davide Aliprandi |
4:21603d68bcf7 | 299 | |
Wolfgang Betz |
0:752e74bf5ef1 | 300 | } // namespace mbed |
Wolfgang Betz |
0:752e74bf5ef1 | 301 | |
Wolfgang Betz |
0:752e74bf5ef1 | 302 | #endif |