Added possibility to use ESP32-IDF log insted of redefined one (#4845)

With this PR user can select to use the original ESP-IDF log instead of the redefined one.

User can also redefine the log function as per [Logging Library](https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/system/log.html#_CPPv419esp_log_set_vprintf14vprintf_like_t) so he can for example redirect logs to a file.

To enable this change just add -DUSE_ESP32_LOG to build flags.
User can also change the default TAG (that now is ES32) to whatever it wants adding '-DTAG="tag_value"' to build flags

CMakeLists.txt

@@ -7,6 +7,7 @@ set(CORE_SRCS
   cores/esp32/esp32-hal-dac.c
   cores/esp32/esp32-hal-gpio.c
   cores/esp32/esp32-hal-i2c.c
+  cores/esp32/esp32-hal-log.c
   cores/esp32/esp32-hal-ledc.c
   cores/esp32/esp32-hal-matrix.c
   cores/esp32/esp32-hal-misc.c

cores/esp32/esp32-hal-log.c

+#ifndef __MY_LOG__
+#define __MY_LOG__
+#include "stdio.h"
+#include "esp32-hal-log.h"
+void log_to_esp(char* tag, esp_log_level_t level, const char *format, ...)
+{
+    va_list va_args;
+    va_start(va_args, format);
+
+    char log_buffer[512];
+    int len = vsnprintf(log_buffer, sizeof(log_buffer), format, va_args);
+    if (len > 0)
+    {
+        ESP_LOG_LEVEL_LOCAL(level, tag, "%s", log_buffer);
+    }
+
+    va_end(va_args);
+}
+#endif

cores/esp32/esp32-hal-log.h

-// Copyright 2015-2021 Espressif Systems (Shanghai) PTE LTD
+// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-
 #ifndef __ARDUHAL_LOG_H__
 #define __ARDUHAL_LOG_H__
 
@@ -37,6 +36,9 @@ extern "C"
 #define ARDUHAL_LOG_LEVEL CONFIG_ARDUHAL_LOG_DEFAULT_LEVEL
 #else
 #define ARDUHAL_LOG_LEVEL CORE_DEBUG_LEVEL
+#ifdef USE_ESP_IDF_LOG
+#define LOG_LOCAL_LEVEL CORE_DEBUG_LEVEL
+#endif
 #endif
 
 #ifndef CONFIG_ARDUHAL_LOG_COLORS
@@ -72,6 +74,8 @@ extern "C"
 #define ARDUHAL_LOG_RESET_COLOR
 #endif
 
+
+
 const char * pathToFileName(const char * path);
 int log_printf(const char *fmt, ...);
 
@@ -79,55 +83,92 @@ int log_printf(const char *fmt, ...);
 #define ARDUHAL_LOG_FORMAT(letter, format)  ARDUHAL_LOG_COLOR_ ## letter "[" #letter "][%s:%u] %s(): " format ARDUHAL_LOG_RESET_COLOR "\r\n", pathToFileName(__FILE__), __LINE__, __FUNCTION__
 
 #if ARDUHAL_LOG_LEVEL >= ARDUHAL_LOG_LEVEL_VERBOSE
+#ifndef USE_ESP_IDF_LOG
 #define log_v(format, ...) log_printf(ARDUHAL_LOG_FORMAT(V, format), ##__VA_ARGS__)
 #define isr_log_v(format, ...) ets_printf(ARDUHAL_LOG_FORMAT(V, format), ##__VA_ARGS__)
 #else
+#define log_v(format, ...) do {log_to_esp(TAG, ESP_LOG_VERBOSE, format, ##__VA_ARGS__);}while(0)
+#define isr_log_v(format, ...) do {ets_printf(LOG_FORMAT(V, format), esp_log_timestamp(), TAG, ##__VA_ARGS__);}while(0)
+#endif
+#else
 #define log_v(format, ...)
 #define isr_log_v(format, ...)
 #endif
 
 #if ARDUHAL_LOG_LEVEL >= ARDUHAL_LOG_LEVEL_DEBUG
+#ifndef USE_ESP_IDF_LOG
 #define log_d(format, ...) log_printf(ARDUHAL_LOG_FORMAT(D, format), ##__VA_ARGS__)
 #define isr_log_d(format, ...) ets_printf(ARDUHAL_LOG_FORMAT(D, format), ##__VA_ARGS__)
 #else
+#define log_d(format, ...) do {log_to_esp(TAG, ESP_LOG_DEBUG, format, ##__VA_ARGS__);}while(0)
+#define isr_log_d(format, ...) do {ets_printf(LOG_FORMAT(D, format), esp_log_timestamp(), TAG, ##__VA_ARGS__);}while(0)
+#endif
+#else
 #define log_d(format, ...)
 #define isr_log_d(format, ...)
 #endif
 
 #if ARDUHAL_LOG_LEVEL >= ARDUHAL_LOG_LEVEL_INFO
+#ifndef USE_ESP_IDF_LOG
 #define log_i(format, ...) log_printf(ARDUHAL_LOG_FORMAT(I, format), ##__VA_ARGS__)
 #define isr_log_i(format, ...) ets_printf(ARDUHAL_LOG_FORMAT(I, format), ##__VA_ARGS__)
 #else
+#define log_i(format, ...) do {log_to_esp(TAG, ESP_LOG_INFO, format, ##__VA_ARGS__);}while(0)
+#define isr_log_i(format, ...) do {ets_printf(LOG_FORMAT(I, format), esp_log_timestamp(), TAG, ##__VA_ARGS__);}while(0)
+#endif
+#else
 #define log_i(format, ...)
 #define isr_log_i(format, ...)
 #endif
 
 #if ARDUHAL_LOG_LEVEL >= ARDUHAL_LOG_LEVEL_WARN
+#ifndef USE_ESP_IDF_LOG
 #define log_w(format, ...) log_printf(ARDUHAL_LOG_FORMAT(W, format), ##__VA_ARGS__)
 #define isr_log_w(format, ...) ets_printf(ARDUHAL_LOG_FORMAT(W, format), ##__VA_ARGS__)
 #else
+#define log_w(format, ...) do {log_to_esp(TAG, ESP_LOG_WARN, format, ##__VA_ARGS__);}while(0)
+#define isr_log_w(format, ...) do {ets_printf(LOG_FORMAT(W, format), esp_log_timestamp(), TAG, ##__VA_ARGS__);}while(0)
+#endif
+#else
 #define log_w(format, ...)
 #define isr_log_w(format, ...)
 #endif
 
 #if ARDUHAL_LOG_LEVEL >= ARDUHAL_LOG_LEVEL_ERROR
+#ifndef USE_ESP_IDF_LOG
 #define log_e(format, ...) log_printf(ARDUHAL_LOG_FORMAT(E, format), ##__VA_ARGS__)
 #define isr_log_e(format, ...) ets_printf(ARDUHAL_LOG_FORMAT(E, format), ##__VA_ARGS__)
 #else
+#define log_e(format, ...) do {log_to_esp(TAG, ESP_LOG_ERROR, format, ##__VA_ARGS__);}while(0)
+#define isr_log_e(format, ...) do {ets_printf(LOG_FORMAT(E, format), esp_log_timestamp(), TAG, ##__VA_ARGS__);}while(0)
+#endif
+#else
 #define log_e(format, ...)
 #define isr_log_e(format, ...)
 #endif
 
 #if ARDUHAL_LOG_LEVEL >= ARDUHAL_LOG_LEVEL_NONE
+#ifndef USE_ESP_IDF_LOG
 #define log_n(format, ...) log_printf(ARDUHAL_LOG_FORMAT(E, format), ##__VA_ARGS__)
 #define isr_log_n(format, ...) ets_printf(ARDUHAL_LOG_FORMAT(E, format), ##__VA_ARGS__)
 #else
+#define log_n(format, ...) do {log_to_esp(TAG, ESP_LOG_ERROR, format, ##__VA_ARGS__);}while(0)
+#define isr_log_n(format, ...) do {ets_printf(LOG_FORMAT(E, format), esp_log_timestamp(), TAG, ##__VA_ARGS__);}while(0)
+#endif
+#else
 #define log_n(format, ...)
 #define isr_log_n(format, ...)
 #endif
 
 #include "esp_log.h"
 
+#ifdef USE_ESP_IDF_LOG
+#ifndef TAG
+#define TAG "ARDUINO"
+#endif
+void log_to_esp(char* tag, esp_log_level_t level, const char* format, ...);
+//#define log_n(format, ...) myLog(ESP_LOG_NONE, format, ##__VA_ARGS__)
+#else
 #ifdef CONFIG_ARDUHAL_ESP_LOG
 #undef ESP_LOGE
 #undef ESP_LOGW
@@ -151,6 +192,7 @@ int log_printf(const char *fmt, ...);
 #define ESP_EARLY_LOGD(tag, ...)  isr_log_d(__VA_ARGS__)
 #define ESP_EARLY_LOGV(tag, ...)  isr_log_v(__VA_ARGS__)
 #endif
+#endif
 
 #ifdef __cplusplus
 }