mirror of
https://github.com/espressif/esp-idf.git
synced 2025-08-08 04:02:27 +00:00
a88e719e33
This adds an assembler for the BitScrambler assembly language, plus unit tests for it. It also adds the loopback driver, which can do BitScrambler operations on memory-to-memory transfers. Documentation is also included.
64 lines
2.0 KiB
C
64 lines
2.0 KiB
C
/*
|
|
* SPDX-FileCopyrightText: 2023-2024 Espressif Systems (Shanghai) CO LTD
|
|
*
|
|
* SPDX-License-Identifier: CC0-1.0
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <sys/unistd.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/types.h>
|
|
#include "esp_err.h"
|
|
#include "esp_log.h"
|
|
#include "esp_check.h"
|
|
#include <stdio.h>
|
|
#include "driver/bitscrambler_loopback.h"
|
|
#include "freertos/FreeRTOS.h"
|
|
#include "freertos/task.h"
|
|
#include "esp_heap_caps.h"
|
|
|
|
//Assign a symbol to the example bitscrambler program. Note that the actual
|
|
//assembly and including in the binary happens in the CMakeLists.txt file.
|
|
BITSCRAMBLER_PROGRAM(bitscrambler_program_example, "example");
|
|
|
|
static const char *TAG = "bs_example";
|
|
|
|
static const uint8_t testdata[] = {
|
|
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, //should give ff 00 ....
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, //should come out as 80 80 80...
|
|
0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, //'unity matrix', should come out the same
|
|
0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, //should come out as 00 ff 00 ff ...
|
|
0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, //should come out as ff 00 ff 00 ...
|
|
};
|
|
|
|
void app_main(void)
|
|
{
|
|
ESP_LOGI(TAG, "BitScrambler example main");
|
|
|
|
uint8_t *data_in, *data_out;
|
|
int len = sizeof(testdata);
|
|
|
|
data_in = heap_caps_calloc(len, 1, MALLOC_CAP_DMA);
|
|
data_out = heap_caps_calloc(len, 1, MALLOC_CAP_DMA);
|
|
assert(data_in);
|
|
assert(data_out);
|
|
memcpy(data_in, testdata, len);
|
|
|
|
bitscrambler_handle_t bs;
|
|
ESP_ERROR_CHECK(bitscrambler_loopback_create(&bs, SOC_BITSCRAMBLER_ATTACH_I2S0, len));
|
|
ESP_ERROR_CHECK(bitscrambler_load_program(bs, bitscrambler_program_example));
|
|
size_t size;
|
|
ESP_ERROR_CHECK(bitscrambler_loopback_run(bs, data_in, len, data_out, len, &size));
|
|
bitscrambler_free(bs);
|
|
|
|
printf("BitScrambler program complete. Input %d, output %d bytes:\n", len, size);
|
|
for (int i = 0; i < size; i++) {
|
|
printf("%02X ", data_out[i]);
|
|
if ((i & 7) == 7) {
|
|
printf("\n");
|
|
}
|
|
}
|
|
printf("\n");
|
|
}
|