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- #include "sdk_common.h"
- #if NRF_MODULE_ENABLED(NRF_CLI_RTT)
- #include <SEGGER_RTT_Conf.h>
- #include <SEGGER_RTT.h>
- #include "nrf_cli_rtt.h"
- #include "nrf_assert.h"
- #include "nrf_delay.h"
- #define RTT_RX_TIMEOUT 100
- static bool m_host_present;
- static void timer_handler(void * p_context)
- {
- nrf_cli_rtt_internal_t * p_internal = (nrf_cli_rtt_internal_t *)p_context;
- if (SEGGER_RTT_HasData(0))
- {
- p_internal->p_cb->handler(NRF_CLI_TRANSPORT_EVT_RX_RDY, p_internal->p_cb->p_context);
- }
- p_internal->p_cb->handler(NRF_CLI_TRANSPORT_EVT_TX_RDY, p_internal->p_cb->p_context);
- ret_code_t err_code = app_timer_start(*p_internal->p_timer,
- APP_TIMER_TICKS(RTT_RX_TIMEOUT),
- p_context);
- ASSERT(err_code == NRF_SUCCESS);
- UNUSED_VARIABLE(err_code);
- }
- static ret_code_t cli_rtt_init(nrf_cli_transport_t const * p_transport,
- void const * p_config,
- nrf_cli_transport_handler_t evt_handler,
- void * p_context)
- {
- UNUSED_PARAMETER(p_config);
- nrf_cli_rtt_internal_t * p_internal =
- CONTAINER_OF(p_transport, nrf_cli_rtt_internal_t, transport);
- p_internal->p_cb->handler = evt_handler;
- p_internal->p_cb->p_context = p_context;
- p_internal->p_cb->timer_created = false;
- SEGGER_RTT_Init();
- m_host_present = true;
- return NRF_SUCCESS;
- }
- static ret_code_t cli_rtt_uninit(nrf_cli_transport_t const * p_transport)
- {
- nrf_cli_rtt_internal_t * p_internal =
- CONTAINER_OF(p_transport, nrf_cli_rtt_internal_t, transport);
- return app_timer_stop(*p_internal->p_timer);
- }
- static ret_code_t cli_rtt_enable(nrf_cli_transport_t const * p_transport,
- bool blocking)
- {
- nrf_cli_rtt_internal_t * p_internal =
- CONTAINER_OF(p_transport, nrf_cli_rtt_internal_t, transport);
- ret_code_t err_code = NRF_SUCCESS;
- if (p_internal->p_cb->timer_created)
- {
- err_code = app_timer_stop(*p_internal->p_timer);
- if ((err_code != NRF_SUCCESS) && (err_code != NRF_ERROR_INVALID_STATE))
- {
- return err_code;
- }
- else
- {
- err_code = NRF_SUCCESS;
- }
- }
- if (!blocking)
- {
- if (!p_internal->p_cb->timer_created)
- {
- err_code = app_timer_create(p_internal->p_timer,
- APP_TIMER_MODE_SINGLE_SHOT,
- timer_handler);
- p_internal->p_cb->timer_created = true;
- }
- if (err_code == NRF_SUCCESS)
- {
- err_code = app_timer_start(*p_internal->p_timer,
- APP_TIMER_TICKS(RTT_RX_TIMEOUT),
- p_internal);
- SEGGER_RTT_Init();
- }
- }
- return err_code;
- }
- static ret_code_t cli_rtt_read(nrf_cli_transport_t const * p_transport,
- void * p_data,
- size_t length,
- size_t * p_cnt)
- {
- ASSERT(p_cnt);
- UNUSED_PARAMETER(p_transport);
- size_t rcnt = SEGGER_RTT_Read(NRF_CLI_RTT_TERMINAL_ID, p_data, length);
- *p_cnt = rcnt;
- return NRF_SUCCESS;
- }
- static ret_code_t cli_rtt_write(nrf_cli_transport_t const * p_transport,
- const void * p_data,
- size_t length,
- size_t * p_cnt)
- {
- ASSERT(p_cnt);
- UNUSED_PARAMETER(p_transport);
- if (!(CoreDebug->DHCSR & CoreDebug_DHCSR_C_DEBUGEN_Msk))
- {
-
- *p_cnt = length;
- return NRF_SUCCESS;
- }
- size_t idx = 0;
- uint32_t processed;
- uint32_t watchdog_counter = NRF_CLI_RTT_TX_RETRY_CNT;
- const uint8_t * p_buffer = (const uint8_t *)p_data;
- do {
- processed = SEGGER_RTT_Write(NRF_CLI_RTT_TERMINAL_ID, &p_buffer[idx], length);
- if (processed == 0)
- {
-
- if (!m_host_present)
- {
- break;
- }
- else
- {
- nrf_delay_ms(NRF_CLI_RTT_TX_RETRY_DELAY_MS);
- watchdog_counter--;
- if (watchdog_counter == 0)
- {
- m_host_present = false;
- break;
- }
- }
- }
- m_host_present = true;
- idx += processed;
- length -= processed;
- } while (length);
- if (idx > 0)
- {
- *p_cnt = idx;
- }
- else
- {
- *p_cnt = length;
- }
- return NRF_SUCCESS;
- }
- const nrf_cli_transport_api_t nrf_cli_rtt_transport_api = {
- .init = cli_rtt_init,
- .uninit = cli_rtt_uninit,
- .enable = cli_rtt_enable,
- .read = cli_rtt_read,
- .write = cli_rtt_write,
- };
- #endif
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