wifi_prov_mgr sample
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Outline
#include <stdio.h>
#include <esp_err.h>
#include "esp_log.h"
#include "qrcodegen.h"
#include "qrcode.h"
TAG
lt
esp_qrcode_print_console(esp_qrcode_handle_t)
esp_qrcode_generate(esp_qrcode_config_t *, const char *)
Files
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SourceVuESP-IDF Framework and Exampleswifi_prov_mgr samplemanaged_components/espressif__qrcode/esp_qrcode_main.c
 
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/* * SPDX-FileCopyrightText: 2015-2021 Espressif Systems (Shanghai) CO LTD * * SPDX-License-Identifier: Apache-2.0 *//* ... */ #include <stdio.h> #include <esp_err.h> #include "esp_log.h" #include "qrcodegen.h" #include "qrcode.h"5 includes static const char *TAG = "QRCODE"; static const char *lt[] = { /* 0 */ " ", /* 1 */ "\u2580 ", /* 2 */ " \u2580", /* 3 */ "\u2580\u2580", /* 4 */ "\u2584 ", /* 5 */ "\u2588 ", /* 6 */ "\u2584\u2580", /* 7 */ "\u2588\u2580", /* 8 */ " \u2584", /* 9 */ "\u2580\u2584", /* 10 */ " \u2588", /* 11 */ "\u2580\u2588", /* 12 */ "\u2584\u2584", /* 13 */ "\u2588\u2584", /* 14 */ "\u2584\u2588", /* 15 */ "\u2588\u2588", }{...}; void esp_qrcode_print_console(esp_qrcode_handle_t qrcode) { int size = qrcodegen_getSize(qrcode); int border = 2; unsigned char num = 0; for (int y = -border; y < size + border; y += 2) { for (int x = -border; x < size + border; x += 2) { num = 0; if (qrcodegen_getModule(qrcode, x, y)) { num |= 1 << 0; }{...} if ((x < size + border) && qrcodegen_getModule(qrcode, x + 1, y)) { num |= 1 << 1; }{...} if ((y < size + border) && qrcodegen_getModule(qrcode, x, y + 1)) { num |= 1 << 2; }{...} if ((x < size + border) && (y < size + border) && qrcodegen_getModule(qrcode, x + 1, y + 1)) { num |= 1 << 3; }{...} printf("%s", lt[num]); }{...} printf("\n"); }{...} printf("\n"); }{ ... } esp_err_t esp_qrcode_generate(esp_qrcode_config_t *cfg, const char *text) { enum qrcodegen_Ecc ecc_lvl; uint8_t *qrcode, *tempbuf; esp_err_t err = ESP_FAIL; qrcode = calloc(1, qrcodegen_BUFFER_LEN_FOR_VERSION(cfg->max_qrcode_version)); if (!qrcode) { return ESP_ERR_NO_MEM; }{...} tempbuf = calloc(1, qrcodegen_BUFFER_LEN_FOR_VERSION(cfg->max_qrcode_version)); if (!tempbuf) { free(qrcode); return ESP_ERR_NO_MEM; }{...} switch (cfg->qrcode_ecc_level) { case ESP_QRCODE_ECC_LOW: ecc_lvl = qrcodegen_Ecc_LOW; break;... case ESP_QRCODE_ECC_MED: ecc_lvl = qrcodegen_Ecc_MEDIUM; break;... case ESP_QRCODE_ECC_QUART: ecc_lvl = qrcodegen_Ecc_QUARTILE; break;... case ESP_QRCODE_ECC_HIGH: ecc_lvl = qrcodegen_Ecc_HIGH; break;... default: ecc_lvl = qrcodegen_Ecc_LOW; break;... }{...} ESP_LOGI(TAG, "Encoding below text with ECC LVL %d & QR Code Version %d", ecc_lvl, cfg->max_qrcode_version); ESP_LOGI(TAG, "%s", text); // Make and print the QR Code symbol bool ok = qrcodegen_encodeText(text, tempbuf, qrcode, ecc_lvl, qrcodegen_VERSION_MIN, cfg->max_qrcode_version, qrcodegen_Mask_AUTO, true); if (ok && cfg->display_func) { cfg->display_func((esp_qrcode_handle_t)qrcode); err = ESP_OK; }{...} free(qrcode); free(tempbuf); return err; }{ ... }
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