unleashed-firmware/applications/examples/u8g2_qrcode.c

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#include "u8g2/u8g2.h"
#include "qrcode/qrcode.h"
#include "flipper.h"
void u8g2_DrawPixelSize(u8g2_t* u8g2, uint8_t x, uint8_t y, uint8_t size) {
for(uint8_t px = 0; px < size; px++) {
for(uint8_t py = 0; py < size; py++) {
u8g2_DrawPixel(u8g2, x + px, y + py);
}
}
}
void u8g2_qrcode(void* p) {
FuriRecordSubscriber* log = get_default_log();
// open record
FuriRecordSubscriber* fb_record = furi_open("u8g2_fb", false, false, NULL, NULL, NULL);
// Allocate a chunk of memory to store the QR code
// https://github.com/ricmoo/QRCode
// we init version 1, 21x21 px, 16 alphanumeric chars with
// QUARTILE error correction
const uint8_t qr_version = 1;
const uint8_t qr_error_correction = ECC_QUARTILE;
const uint8_t qr_x = 32;
const uint8_t qr_y = 0;
const uint8_t qr_size = 3;
// The structure to manage the QR code
QRCode qrcode;
// QR Code init
uint8_t qrcodeBytes[qrcode_getBufferSize(qr_version)];
qrcode_initText(&qrcode, qrcodeBytes, qr_version, qr_error_correction, "HELLO FLIPPER");
if(fb_record == NULL) {
fuprintf(log, "[widget] cannot create fb record\n");
furiac_exit(NULL);
}
u8g2_t* fb = furi_take(fb_record);
// clear display
if(fb != NULL) {
u8g2_ClearBuffer(fb);
}
while(1) {
if(fb != NULL) {
// draw qr code
for(uint8_t y = 0; y < qrcode.size; y++) {
for(uint8_t x = 0; x < qrcode.size; x++) {
if(qrcode_getModule(&qrcode, x, y)) {
u8g2_SetDrawColor(fb, 1);
u8g2_DrawPixelSize(fb, qr_x + x * qr_size, qr_y + y * qr_size, qr_size);
} else {
u8g2_SetDrawColor(fb, 0);
u8g2_DrawPixelSize(fb, qr_x + x * qr_size, qr_y + y * qr_size, qr_size);
}
}
}
} else {
furiac_exit(NULL);
}
furi_commit(fb_record);
delay(1);
}
}