1 files changed, 123 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/experimental_log/src/nrf_log_backend_rtt.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/experimental_log/src/nrf_log_backend_rtt.c
new file mode 100644
index 0000000..1ff3a26
--- /dev/null
+++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/experimental_log/src/nrf_log_backend_rtt.c
@@ -0,0 +1,123 @@
+/**
+ * Copyright (c) 2016 - 2018, Nordic Semiconductor ASA
+ * 
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form, except as embedded into a Nordic
+ *    Semiconductor ASA integrated circuit in a product or a software update for
+ *    such product, must reproduce the above copyright notice, this list of
+ *    conditions and the following disclaimer in the documentation and/or other
+ *    materials provided with the distribution.
+ * 
+ * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ * 
+ * 4. This software, with or without modification, must only be used with a
+ *    Nordic Semiconductor ASA integrated circuit.
+ * 
+ * 5. Any software provided in binary form under this license must not be reverse
+ *    engineered, decompiled, modified and/or disassembled.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ */
+#include "sdk_common.h"
+#if NRF_MODULE_ENABLED(NRF_LOG) && NRF_MODULE_ENABLED(NRF_LOG_BACKEND_RTT)
+#include "nrf_log_backend_rtt.h"
+#include "nrf_log_backend_serial.h"
+#include "nrf_log_str_formatter.h"
+#include "nrf_log_internal.h"
+#include "nrf_delay.h"
+#include <SEGGER_RTT_Conf.h>
+#include <SEGGER_RTT.h>
+
+static bool m_host_present;
+
+static uint8_t m_string_buff[NRF_LOG_BACKEND_RTT_TEMP_BUFFER_SIZE];
+
+void nrf_log_backend_rtt_init(void)
+{
+    SEGGER_RTT_Init();
+}
+
+static void serial_tx(void const * p_context, char const * buffer, size_t len)
+{
+    if (len)
+    {
+        uint32_t idx    = 0;
+        uint32_t processed;
+        uint32_t watchdog_counter = NRF_LOG_BACKEND_RTT_TX_RETRY_CNT;
+        do
+        {
+            processed = SEGGER_RTT_WriteNoLock(0, &buffer[idx], len);
+            idx += processed;
+            len -= processed;
+            if (processed == 0)
+            {
+                /* There are two possible reasons for not writing any data to RTT:
+                 * - The host is not connected and not reading the data.
+                 * - The buffer got full and will be read by the host.
+                 * These two situations are distinguished using the following algorithm.
+                 * At the begining, the module assumes that the host is active,
+                 * so when no data is read, it busy waits and retries.
+                 * If, after retrying, the host reads the data, the module assumes that the host is active.
+                 * If it fails, the module assumes that the host is inactive and stores that information. On next
+                 * call, only one attempt takes place. The host is marked as active if the attempt is successful.
+                 */
+                if (!m_host_present)
+                {
+                    break;
+                }
+                else
+                {
+                    nrf_delay_ms(NRF_LOG_BACKEND_RTT_TX_RETRY_DELAY_MS);
+                    watchdog_counter--;
+                    if (watchdog_counter == 0)
+                    {
+                        m_host_present = false;
+                        break;
+                    }
+                }
+            }
+            m_host_present = true;
+        } while (len);
+    }
+}
+static void nrf_log_backend_rtt_put(nrf_log_backend_t const * p_backend,
+                               nrf_log_entry_t * p_msg)
+{
+    nrf_log_backend_serial_put(p_backend, p_msg, m_string_buff, NRF_LOG_BACKEND_RTT_TEMP_BUFFER_SIZE, serial_tx);
+}
+
+static void nrf_log_backend_rtt_flush(nrf_log_backend_t const * p_backend)
+{
+
+}
+
+static void nrf_log_backend_rtt_panic_set(nrf_log_backend_t const * p_backend)
+{
+
+}
+
+const nrf_log_backend_api_t nrf_log_backend_rtt_api = {
+        .put       = nrf_log_backend_rtt_put,
+        .flush     = nrf_log_backend_rtt_flush,
+        .panic_set = nrf_log_backend_rtt_panic_set,
+};
+#endif //NRF_MODULE_ENABLED(NRF_LOG) && NRF_MODULE_ENABLED(NRF_LOG_BACKEND_RTT)