add new example (we'll need it in the fwuploader)

Author: umbynos

libraries/SSLClient/examples/CertificateUploaderYModem/CertificateUploaderYModem.ino

@@ -0,0 +1,171 @@
+/*
+  Portenta C33 - Certificate uploader
+
+  The sketch uploads and saves network certificates on the system
+  partition of the QSPI flash
+
+  This example code is in the public domain.
+*/
+
+#include "BlockDevice.h"
+#include "MBRBlockDevice.h"
+#include "FATFileSystem.h"
+#include "certificates.h"
+#include "ymodem.h"
+
+BlockDevice* root = BlockDevice::get_default_instance();
+MBRBlockDevice sys_bd(root, 1);
+FATFileSystem sys_fs("sys");
+
+char filename[256] = {'\0'};
+
+long getFileLen(FILE *file) {
+  fseek(file, 0, SEEK_END);
+  long len = ftell(file);
+  fseek(file, 0, SEEK_SET);
+  //Decrement len by 1 to remove the CRC from the count
+  return len;
+}
+
+long getFileSize(FILE *fp) {
+    fseek(fp, 0, SEEK_END);
+    int size = ftell(fp);
+    fseek(fp, 0, SEEK_SET);
+    
+    return size;
+}
+
+// void printProgress(uint32_t offset, uint32_t size, uint32_t threshold, bool reset) {
+//   static int percent_done = 0;
+//   if (reset == true) {
+//     percent_done = 0;
+//     Serial.println("Flashed " + String(percent_done) + "%");
+//   } else {
+//     uint32_t percent_done_new = offset * 100 / size;
+//     if (percent_done_new >= percent_done + threshold) {
+//       percent_done = percent_done_new;
+//       Serial.println("Flashed " + String(percent_done) + "%");
+//     }
+//   }
+// }
+
+void setup() {
+
+  Serial.begin(115200);
+  // while (!Serial);
+
+  int err =  sys_fs.mount(&sys_bd);
+  if (err) {
+    // Reformat if we can't mount the filesystem
+    // this should only happen on the first boot
+    // Serial.println("No filesystem containing the WiFi firmware was found.");
+    // Serial.println("Usually that means that the WiFi firmware has not been installed yet"
+    //               " or was overwritten with another firmware.\n");
+    // Serial.println("Formatting the filsystem to install the firmware and certificates...\n");
+    err = sys_fs.reformat(&sys_bd);
+  }
+
+  // DIR *dir;
+  // struct dirent *ent;
+
+  // if ((dir = opendir("/sys")) != NULL) {
+  //   /* print all the files and directories within directory */
+  //   while ((ent = readdir (dir)) != NULL) {
+  //     Serial.println("Searching for WiFi firmware file " + String(ent->d_name) + " ...");
+  //     String fullname = "/sys/" + String(ent->d_name);
+  //     if (fullname == "/sys/cacert.pem") {
+  //       Serial.println("A WiFi firmware is already installed. "
+  //                      "Do you want to install the firmware anyway? Y/[n]");
+  //       while (1) {
+  //         if (Serial.available()) {
+  //           int c = Serial.read();
+  //           if (c == 'Y' || c == 'y') {
+  //             sys_fs.reformat(&sys_bd);
+  //             break;
+  //           }
+  //           if (c == 'N' || c == 'n') {
+  //             Serial.println("It's now safe to reboot or disconnect your board.");
+  //             return;
+  //           }
+  //         }
+  //       }
+  //     }
+  //   }
+  //   closedir (dir);
+  // }
+
+  
+
+  int chunk_size = 128;
+  int byte_count = 0;
+  FILE* fp = fopen("/sys/cacert.pem", "wb");
+
+  // Serial.println("Flashing certificates");
+  // printProgress(byte_count, cacert_pem_len, 10, true);
+  while (byte_count < cacert_pem_len) {
+    if(byte_count + chunk_size > cacert_pem_len)
+      chunk_size = cacert_pem_len - byte_count;
+    int ret = fwrite(&cacert_pem[byte_count], chunk_size, 1 ,fp);
+    if (ret != 1) {
+      // Serial.println("Error writing certificates");
+      break;
+    }
+    byte_count += chunk_size;
+    // printProgress(byte_count, cacert_pem_len, 10, false);
+  }
+  fclose(fp);
+
+  // fp = fopen("/sys/cacert.pem", "rb");
+  // char buffer[128];
+  // int ret = fread(buffer, 1, 128, fp);
+  // Serial.write(buffer, ret);
+  // while (ret == 128) {
+  //   ret = fread(buffer, 1, 128, fp);
+  //   Serial.write(buffer, ret);
+  // }
+  // fclose(fp);
+
+  // Serial.println("\nFirmware and certificates updated!");
+  // Serial.println("It's now safe to reboot or disconnect your board.");
+}
+
+void loop() {
+
+  uint8_t command = 0xFF;
+
+  if (Serial.available()) {
+    command = Serial.read();
+  }
+
+  if (command == 'Y') {
+    FILE* f = fopen("/sys/temp.bin", "wb");
+    while (Serial.available()) {
+      Serial.read();
+    }
+    Serial.print("Y");
+    int ret = Ymodem_Receive(f, 1024 * 1024, filename);
+    String name = String(filename);
+    if (ret > 0 && name != "") {
+      name = "/sys/" + name;
+      fclose(f);
+      ret = rename("/sys/temp.bin", name.c_str());
+    }
+  }
+  if (command == 'R') {
+    String filename = Serial.readStringUntil('\r');
+    filename.trim();
+    String filename_abs = String("/sys/") + filename;
+    FILE* f = fopen(filename_abs.c_str(), "rb");
+    while (Serial.available()) {
+      Serial.read();
+    }
+    if (f != NULL) {
+      Serial.print("R");
+      int ret = Ymodem_Transmit((char*)filename.c_str(), getFileLen(f), f);
+      fclose(f);
+    }
+  }
+  if (command == 0xFF) {
+    delay(10);
+  }
+}