nrf_log_backend_uart.c 4.3 KB

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  1. /**
  2. * Copyright (c) 2016 - 2020, Nordic Semiconductor ASA
  3. *
  4. * All rights reserved.
  5. *
  6. * Redistribution and use in source and binary forms, with or without modification,
  7. * are permitted provided that the following conditions are met:
  8. *
  9. * 1. Redistributions of source code must retain the above copyright notice, this
  10. * list of conditions and the following disclaimer.
  11. *
  12. * 2. Redistributions in binary form, except as embedded into a Nordic
  13. * Semiconductor ASA integrated circuit in a product or a software update for
  14. * such product, must reproduce the above copyright notice, this list of
  15. * conditions and the following disclaimer in the documentation and/or other
  16. * materials provided with the distribution.
  17. *
  18. * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
  19. * contributors may be used to endorse or promote products derived from this
  20. * software without specific prior written permission.
  21. *
  22. * 4. This software, with or without modification, must only be used with a
  23. * Nordic Semiconductor ASA integrated circuit.
  24. *
  25. * 5. Any software provided in binary form under this license must not be reverse
  26. * engineered, decompiled, modified and/or disassembled.
  27. *
  28. * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
  29. * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  30. * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
  31. * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
  32. * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  33. * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  34. * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  35. * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  36. * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  37. * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  38. *
  39. */
  40. #include "sdk_common.h"
  41. #if NRF_MODULE_ENABLED(NRF_LOG) && NRF_MODULE_ENABLED(NRF_LOG_BACKEND_UART)
  42. #include "nrf_log_backend_uart.h"
  43. #include "nrf_log_backend_serial.h"
  44. #include "nrf_log_internal.h"
  45. #include "nrf_drv_uart.h"
  46. #include "app_error.h"
  47. nrf_drv_uart_t m_uart = NRF_DRV_UART_INSTANCE(0);
  48. static uint8_t m_string_buff[NRF_LOG_BACKEND_UART_TEMP_BUFFER_SIZE];
  49. static volatile bool m_xfer_done;
  50. static bool m_async_mode;
  51. static void uart_evt_handler(nrf_drv_uart_event_t * p_event, void * p_context)
  52. {
  53. m_xfer_done = true;
  54. }
  55. static void uart_init(bool async_mode)
  56. {
  57. nrf_drv_uart_config_t config = NRF_DRV_UART_DEFAULT_CONFIG;
  58. config.pseltxd = NRF_LOG_BACKEND_UART_TX_PIN;
  59. config.pselrxd = NRF_UART_PSEL_DISCONNECTED;
  60. config.pselcts = NRF_UART_PSEL_DISCONNECTED;
  61. config.pselrts = NRF_UART_PSEL_DISCONNECTED;
  62. config.baudrate = (nrf_uart_baudrate_t)NRF_LOG_BACKEND_UART_BAUDRATE;
  63. ret_code_t err_code = nrf_drv_uart_init(&m_uart, &config, async_mode ? uart_evt_handler : NULL);
  64. APP_ERROR_CHECK(err_code);
  65. m_async_mode = async_mode;
  66. }
  67. void nrf_log_backend_uart_init(void)
  68. {
  69. bool async_mode = NRF_LOG_DEFERRED ? true : false;
  70. uart_init(async_mode);
  71. }
  72. static void serial_tx(void const * p_context, char const * p_buffer, size_t len)
  73. {
  74. uint8_t len8 = (uint8_t)(len & 0x000000FF);
  75. m_xfer_done = false;
  76. ret_code_t err_code = nrf_drv_uart_tx(&m_uart, (uint8_t *)p_buffer, len8);
  77. APP_ERROR_CHECK(err_code);
  78. /* wait for completion since buffer is reused*/
  79. while (m_async_mode && (m_xfer_done == false))
  80. {
  81. }
  82. }
  83. static void nrf_log_backend_uart_put(nrf_log_backend_t const * p_backend,
  84. nrf_log_entry_t * p_msg)
  85. {
  86. nrf_log_backend_serial_put(p_backend, p_msg, m_string_buff,
  87. NRF_LOG_BACKEND_UART_TEMP_BUFFER_SIZE, serial_tx);
  88. }
  89. static void nrf_log_backend_uart_flush(nrf_log_backend_t const * p_backend)
  90. {
  91. }
  92. static void nrf_log_backend_uart_panic_set(nrf_log_backend_t const * p_backend)
  93. {
  94. nrf_drv_uart_uninit(&m_uart);
  95. uart_init(false);
  96. }
  97. const nrf_log_backend_api_t nrf_log_backend_uart_api = {
  98. .put = nrf_log_backend_uart_put,
  99. .flush = nrf_log_backend_uart_flush,
  100. .panic_set = nrf_log_backend_uart_panic_set,
  101. };
  102. #endif //NRF_MODULE_ENABLED(NRF_LOG) && NRF_MODULE_ENABLED(NRF_LOG_BACKEND_UART)