Apptrace - Read data from host

[mikbeng]

I have some questions using the apptrace library to read data from host via jtag and openocd-esp32. I've successfully got communication working from target to host with the example in the documentation: https://docs.espressif.com/projects/esp ... ic-tracing:

Code: Select all

#include "esp_app_trace.h"
...
char buf[] = "Hello World!";
esp_err_t res = esp_apptrace_write(ESP_APPTRACE_DEST_TRAX, buf, strlen(buf), ESP_APPTRACE_TMO_INFINITE);
if (res != ESP_OK) {
    ESP_LOGE(TAG, "Failed to write data to host!");
    return res;
}

What I'm wondering is how to set up the host in order to write data to the target. The apptrace library provides API for reading data from host:

Code: Select all

#include "esp_app_trace.h"
...
char buf[32];
char down_buf[32];
size_t sz = sizeof(buf);

/* config down buffer */
esp_apptrace_down_buffer_config(down_buf, sizeof(down_buf));
/* check for incoming data and read them if any */
esp_err_t res = esp_apptrace_read(ESP_APPTRACE_DEST_TRAX, buf, &sz, 0/*do not wait*/);
if (res != ESP_OK) {
    ESP_LOGE(TAG, "Failed to read data from host!");
    return res;
}
if (sz > 0) {
    /* we have data, process them */
    ...
}

But there is no information on how to set up this on the host side. Anyone that has done this? Is it possible to send data via openocd-esp32 with some command?

Any tips are helpful!

[samyozn@gmail.com]

have you found a solution to it? it is 2023 and they still not having example in the API guide.