Ben Tyner | 73ac368 | 2020-01-09 10:46:47 -0600 | [diff] [blame] | 1 | #include "attn_monitor.hpp" |
| 2 | |
| 3 | #include "attn_handler.hpp" |
| 4 | |
Ben Tyner | 9ae5ca4 | 2020-02-28 13:13:50 -0600 | [diff] [blame] | 5 | #include <logging.hpp> |
Ben Tyner | 73ac368 | 2020-01-09 10:46:47 -0600 | [diff] [blame] | 6 | |
| 7 | namespace attn |
| 8 | { |
| 9 | |
| 10 | /** @brief Register a callback for gpio event */ |
| 11 | void AttnMonitor::scheduleGPIOEvent() |
| 12 | { |
Ben Tyner | 9ae5ca4 | 2020-02-28 13:13:50 -0600 | [diff] [blame] | 13 | std::string logMessage = "... waiting for events ..."; |
Ben Tyner | 73ac368 | 2020-01-09 10:46:47 -0600 | [diff] [blame] | 14 | log<level::INFO>(logMessage.c_str()); |
| 15 | |
| 16 | // Register async callback, note that callback is a |
| 17 | // lambda function with "this" pointer captured |
| 18 | iv_gpioEventDescriptor.async_wait( |
| 19 | boost::asio::posix::stream_descriptor::wait_read, |
| 20 | [this](const boost::system::error_code& ec) { |
| 21 | if (ec) |
| 22 | { |
Ben Tyner | 9ae5ca4 | 2020-02-28 13:13:50 -0600 | [diff] [blame] | 23 | std::string logMessage = |
| 24 | "GPIO Async wait error: " + std::string(ec.message()); |
Ben Tyner | 73ac368 | 2020-01-09 10:46:47 -0600 | [diff] [blame] | 25 | log<level::INFO>(logMessage.c_str()); |
| 26 | } |
| 27 | else |
| 28 | { |
Ben Tyner | 117af99 | 2020-05-22 13:32:11 -0500 | [diff] [blame] | 29 | log<level::INFO>("Attention monitor detected active attention"); |
Ben Tyner | 73ac368 | 2020-01-09 10:46:47 -0600 | [diff] [blame] | 30 | handleGPIOEvent(); // gpio trigger detected |
| 31 | } |
| 32 | return; |
| 33 | }); // register async callback |
| 34 | } |
| 35 | |
| 36 | /** @brief Handle the GPIO state change event */ |
| 37 | void AttnMonitor::handleGPIOEvent() |
| 38 | { |
| 39 | gpiod_line_event gpioEvent; |
| 40 | std::string logMessage; |
| 41 | |
| 42 | if (gpiod_line_event_read_fd(iv_gpioEventDescriptor.native_handle(), |
| 43 | &gpioEvent) < 0) |
| 44 | { |
Ben Tyner | 9ae5ca4 | 2020-02-28 13:13:50 -0600 | [diff] [blame] | 45 | logMessage = "GPIO line read failed"; |
Ben Tyner | 73ac368 | 2020-01-09 10:46:47 -0600 | [diff] [blame] | 46 | log<level::INFO>(logMessage.c_str()); |
| 47 | } |
| 48 | else |
| 49 | { |
| 50 | switch (gpiod_line_get_value(iv_gpioLine)) |
| 51 | { |
| 52 | // active attention when gpio == 0 |
| 53 | case 0: |
Ben Tyner | 117af99 | 2020-05-22 13:32:11 -0500 | [diff] [blame] | 54 | logMessage = "Attention monitor calling attention handler"; |
| 55 | log<level::INFO>(logMessage.c_str()); |
Ben Tyner | 3fb52e5 | 2020-03-31 10:10:07 -0500 | [diff] [blame] | 56 | attnHandler(iv_config); |
Ben Tyner | 73ac368 | 2020-01-09 10:46:47 -0600 | [diff] [blame] | 57 | break; |
| 58 | |
| 59 | // gpio == 1, GPIO handler should not be executing |
| 60 | case 1: |
Ben Tyner | 9ae5ca4 | 2020-02-28 13:13:50 -0600 | [diff] [blame] | 61 | logMessage = "GPIO handler out of sync"; |
Ben Tyner | 73ac368 | 2020-01-09 10:46:47 -0600 | [diff] [blame] | 62 | log<level::INFO>(logMessage.c_str()); |
| 63 | break; |
| 64 | |
| 65 | // unexpected value |
| 66 | default: |
Ben Tyner | 9ae5ca4 | 2020-02-28 13:13:50 -0600 | [diff] [blame] | 67 | logMessage = "GPIO line unexpected value"; |
Ben Tyner | 73ac368 | 2020-01-09 10:46:47 -0600 | [diff] [blame] | 68 | log<level::INFO>(logMessage.c_str()); |
| 69 | } |
| 70 | } |
| 71 | scheduleGPIOEvent(); // continue monitoring gpio |
| 72 | } |
| 73 | |
| 74 | /** @brief Request a GPIO line for monitoring attention events */ |
| 75 | void AttnMonitor::requestGPIOEvent() |
| 76 | { |
| 77 | if (0 != gpiod_line_request(iv_gpioLine, &iv_gpioConfig, 0)) |
| 78 | { |
Ben Tyner | 9ae5ca4 | 2020-02-28 13:13:50 -0600 | [diff] [blame] | 79 | std::string logMessage = "failed request for GPIO"; |
Ben Tyner | 73ac368 | 2020-01-09 10:46:47 -0600 | [diff] [blame] | 80 | log<level::INFO>(logMessage.c_str()); |
| 81 | } |
| 82 | else |
| 83 | { |
| 84 | int gpioLineFd; |
| 85 | |
| 86 | gpioLineFd = gpiod_line_event_get_fd(iv_gpioLine); |
| 87 | if (gpioLineFd < 0) |
| 88 | { |
Ben Tyner | 9ae5ca4 | 2020-02-28 13:13:50 -0600 | [diff] [blame] | 89 | std::string logMessage = "failed to get file descriptor"; |
Ben Tyner | 73ac368 | 2020-01-09 10:46:47 -0600 | [diff] [blame] | 90 | log<level::INFO>(logMessage.c_str()); |
| 91 | } |
| 92 | else |
| 93 | { |
| 94 | // Register file descriptor for monitoring |
| 95 | iv_gpioEventDescriptor.assign(gpioLineFd); |
| 96 | |
| 97 | // Start monitoring |
| 98 | scheduleGPIOEvent(); |
| 99 | } |
| 100 | } |
| 101 | } |
| 102 | |
| 103 | } // namespace attn |