amiro-os / components / bus / i2c / VI2CDriver.cpp @ e2002d0e
History | View | Annotate | Download (1.496 KB)
| 1 | 58fe0e0b | Thomas Schöpping | #include <chdebug.h> |
|---|---|---|---|
| 2 | #include <amiro/bus/i2c/I2CMultiplexer.hpp> |
||
| 3 | #include <amiro/bus/i2c/VI2CDriver.hpp> |
||
| 4 | |||
| 5 | namespace amiro {
|
||
| 6 | |||
| 7 | VI2CDriver:: |
||
| 8 | VI2CDriver(I2CMultiplexer *driver, const uint8_t bus_id) :
|
||
| 9 | driver(driver), |
||
| 10 | id(bus_id) {
|
||
| 11 | |||
| 12 | #if CH_USE_MUTEXES
|
||
| 13 | chMtxInit(&this->mutex);
|
||
| 14 | #else
|
||
| 15 | chSemInit(&this->semaphore, 1); |
||
| 16 | #endif /* CH_USE_MUTEXES */ |
||
| 17 | |||
| 18 | }; |
||
| 19 | |||
| 20 | |||
| 21 | void
|
||
| 22 | VI2CDriver:: |
||
| 23 | start(const I2CConfig* config) {
|
||
| 24 | |||
| 25 | /* silently discard config */
|
||
| 26 | (void) config;
|
||
| 27 | /* ignore starts */
|
||
| 28 | |||
| 29 | } |
||
| 30 | |||
| 31 | void
|
||
| 32 | VI2CDriver:: |
||
| 33 | stop() {
|
||
| 34 | |||
| 35 | /* ignore stops */
|
||
| 36 | |||
| 37 | } |
||
| 38 | |||
| 39 | i2cflags_t |
||
| 40 | VI2CDriver:: |
||
| 41 | getErrors() {
|
||
| 42 | |||
| 43 | return this->driver->getErrors(); |
||
| 44 | |||
| 45 | } |
||
| 46 | |||
| 47 | msg_t |
||
| 48 | VI2CDriver:: |
||
| 49 | masterTransmit(const I2CTxParams *params, systime_t timeout) {
|
||
| 50 | |||
| 51 | msg_t ret; |
||
| 52 | |||
| 53 | this->driver->acquireBus();
|
||
| 54 | |||
| 55 | if (!(ret = this->driver->select(this->id))) { |
||
| 56 | ret = this->driver->masterTransmit(params, timeout);
|
||
| 57 | } |
||
| 58 | |||
| 59 | this->driver->deselect();
|
||
| 60 | this->driver->releaseBus();
|
||
| 61 | |||
| 62 | return ret;
|
||
| 63 | } |
||
| 64 | |||
| 65 | msg_t |
||
| 66 | VI2CDriver:: |
||
| 67 | masterReceive(const I2CRxParams *params, systime_t timeout) {
|
||
| 68 | |||
| 69 | msg_t ret; |
||
| 70 | |||
| 71 | this->driver->acquireBus();
|
||
| 72 | |||
| 73 | if (!(ret = this->driver->select(this->id))) |
||
| 74 | ret = this->driver->masterReceive(params, timeout);
|
||
| 75 | |||
| 76 | this->driver->deselect();
|
||
| 77 | this->driver->releaseBus();
|
||
| 78 | |||
| 79 | return ret;
|
||
| 80 | |||
| 81 | } |
||
| 82 | |||
| 83 | |||
| 84 | void
|
||
| 85 | VI2CDriver:: |
||
| 86 | acquireBus() {
|
||
| 87 | |||
| 88 | #if CH_USE_MUTEXES
|
||
| 89 | chMtxLock(&this->mutex);
|
||
| 90 | #elif CH_USE_SEMAPHORES
|
||
| 91 | chSemWait(&this->semaphore);
|
||
| 92 | #endif
|
||
| 93 | |||
| 94 | } |
||
| 95 | |||
| 96 | void
|
||
| 97 | VI2CDriver:: |
||
| 98 | releaseBus() {
|
||
| 99 | |||
| 100 | #if CH_USE_MUTEXES
|
||
| 101 | chMtxUnlock(); |
||
| 102 | #elif CH_USE_SEMAPHORES
|
||
| 103 | chSemSignal(&this->semaphore);
|
||
| 104 | #endif
|
||
| 105 | |||
| 106 | } |
||
| 107 | |||
| 108 | } |
||
| 109 | /* amiro */ |