8d43859b6a
Implements support for system level traces compatible with SEGGER SystemView tool on top of ESP32 application tracing module. That kind of traces can help to analyse program's behaviour. SystemView can show timeline of tasks/ISRs execution, context switches, statistics related to the CPUs' load distribution etc. Also this commit adds useful feature to ESP32 application tracing module: - Trace data buffering is implemented to handle temporary peaks of events load
134 lines
5 KiB
C
134 lines
5 KiB
C
// Copyright 2017 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef ESP_APP_TRACE_H_
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#define ESP_APP_TRACE_H_
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#include <stdarg.h>
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#include "esp_err.h"
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#include "freertos/portmacro.h"
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/** Infinite waiting timeout */
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#define ESP_APPTRACE_TMO_INFINITE ((uint32_t)-1)
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/**
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* Application trace data destinations bits.
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*/
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typedef enum {
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ESP_APPTRACE_DEST_TRAX = 0x1, ///< JTAG destination
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ESP_APPTRACE_DEST_UART0 = 0x2, ///< UART destination
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} esp_apptrace_dest_t;
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/**
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* @brief Initializes application tracing module.
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*
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* @note Should be called before any esp_apptrace_xxx call.
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*
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* @return ESP_OK on success, otherwise see esp_err_t
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*/
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esp_err_t esp_apptrace_init();
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/**
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* @brief Allocates buffer for trace data.
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* After data in buffer are ready to be sent off esp_apptrace_buffer_put must be called to indicate it.
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*
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* @param dest Indicates HW interface to send data.
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* @param size Size of data to write to trace buffer.
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* @param tmo Timeout for operation (in us). Use ESP_APPTRACE_TMO_INFINITE to wait indefinetly.
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*
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* @return non-NULL on success, otherwise NULL.
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*/
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uint8_t *esp_apptrace_buffer_get(esp_apptrace_dest_t dest, size_t size, uint32_t tmo);
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/**
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* @brief Indicates that the data in buffer are ready to be sent off.
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* This function is a counterpart of must be preceeded by esp_apptrace_buffer_get.
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*
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* @param dest Indicates HW interface to send data. Should be identical to the same parameter in call to esp_apptrace_buffer_get.
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* @param ptr Address of trace buffer to release. Should be the value returned by call to esp_apptrace_buffer_get.
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* @param tmo Timeout for operation (in us). Use ESP_APPTRACE_TMO_INFINITE to wait indefinetly.
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*
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* @return ESP_OK on success, otherwise see esp_err_t
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*/
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esp_err_t esp_apptrace_buffer_put(esp_apptrace_dest_t dest, uint8_t *ptr, uint32_t tmo);
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/**
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* @brief Writes data to trace buffer.
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*
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* @param dest Indicates HW interface to send data.
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* @param data Address of data to write to trace buffer.
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* @param size Size of data to write to trace buffer.
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* @param tmo Timeout for operation (in us). Use ESP_APPTRACE_TMO_INFINITE to wait indefinetly.
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*
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* @return ESP_OK on success, otherwise see esp_err_t
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*/
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esp_err_t esp_apptrace_write(esp_apptrace_dest_t dest, const void *data, size_t size, uint32_t tmo);
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/**
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* @brief vprintf-like function to sent log messages to host via specified HW interface.
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*
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* @param dest Indicates HW interface to send data.
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* @param tmo Timeout for operation (in us). Use ESP_APPTRACE_TMO_INFINITE to wait indefinetly.
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* @param fmt Address of format string.
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* @param ap List of arguments.
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*
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* @return Number of bytes written.
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*/
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int esp_apptrace_vprintf_to(esp_apptrace_dest_t dest, uint32_t tmo, const char *fmt, va_list ap);
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/**
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* @brief vprintf-like function to sent log messages to host.
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*
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* @param fmt Address of format string.
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* @param ap List of arguments.
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*
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* @return Number of bytes written.
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*/
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int esp_apptrace_vprintf(const char *fmt, va_list ap);
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/**
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* @brief Flushes remaining data in trace buffer to host.
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*
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* @param dest Indicates HW interface to flush data on.
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* @param tmo Timeout for operation (in us). Use ESP_APPTRACE_TMO_INFINITE to wait indefinetly.
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*
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* @return ESP_OK on success, otherwise see esp_err_t
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*/
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esp_err_t esp_apptrace_flush(esp_apptrace_dest_t dest, uint32_t tmo);
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/**
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* @brief Flushes remaining data in trace buffer to host without locking internal data.
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* This is special version of esp_apptrace_flush which should be called from panic handler.
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*
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* @param dest Indicates HW interface to flush data on.
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* @param min_sz Threshold for flushing data. If current filling level is above this value, data will be flushed. TRAX destinations only.
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* @param tmo Timeout for operation (in us). Use ESP_APPTRACE_TMO_INFINITE to wait indefinetly.
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*
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* @return ESP_OK on success, otherwise see esp_err_t
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*/
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esp_err_t esp_apptrace_flush_nolock(esp_apptrace_dest_t dest, uint32_t min_sz, uint32_t tmo);
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/**
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* @brief Reads host data from trace buffer.
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*
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* @param dest Indicates HW interface to read the data on.
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* @param data Address of buffer to put data from trace buffer.
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* @param size Pointer to store size of read data. Before call to this function pointed memory must hold requested size of data
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* @param tmo Timeout for operation (in us). Use ESP_APPTRACE_TMO_INFINITE to wait indefinetly.
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*
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* @return ESP_OK on success, otherwise see esp_err_t
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*/
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esp_err_t esp_apptrace_read(esp_apptrace_dest_t dest, void *data, size_t *size, uint32_t tmo);
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#endif
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