Add the RTK reset application

Firmware/RTK_Surveyor/Tasks.ino

@@ -1285,7 +1285,7 @@ void sdSizeCheckTask(void *e)
                     sdCardSize = SD_MMC.cardSize();
                     sdFreeSpace = SD_MMC.totalBytes() - SD_MMC.usedBytes();
                 }
-#endif // COMPILE_SD_MMC
+#endif  // COMPILE_SD_MMC
 
                 xSemaphoreGive(sdCardSemaphore);
 

Firmware/Tools/RTK_Reset.c

@@ -0,0 +1,154 @@
+//------------------------------------------------------------------------------
+// Lee Leahy
+// 12 June 2023
+//
+// Program to reset the ESP32
+//------------------------------------------------------------------------------
+//
+// Starting from the SparkFun RTK Surveyor
+//
+//      https://www.sparkfun.com/products/18443
+//
+// Schematic
+//
+//      https://cdn.sparkfun.com/assets/c/1/b/d/8/SparkFun_RTK_Surveyor-v13.pdf
+//
+//              ___     ___    GPIO-0   PU
+//              DTR     RTS     BOOT    EN
+//               0       0       1       1      Run flash code
+//               0       1       0       1      Download code, write to flash
+//               1       0       1       0      Power off
+//               1       1       0       0      Power off
+//
+// To the ESP-WROOM-32 datasheet
+//
+//      https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32_datasheet_en.pdf
+//
+// To the ESP-32 Series datasheet
+//
+//      https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf
+//
+//      PU - 0: Power off, 1: Power on/up
+//
+//      GPIO-O: Saved at power up, 0 = download image, 1 = boot from flash
+//
+//------------------------------------------------------------------------------
+
+#define MICROSECONDS                1
+#define MILLISECONDS                (1000 * MICROSECONDS)
+#define POWER_OFF_DELAY             (250 * MILLISECONDS)
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <sys/ioctl.h>
+#include <termios.h>
+#include <unistd.h>
+
+const int dtrPin = TIOCM_DTR;
+const int rtsPin = TIOCM_RTS;
+
+//                             GPIO-0   PU
+//              DTR     RTS     BOOT    EN
+//               1       1       1       1      Run flash code
+//               1       0       0       1      Download code, write to flash
+//               0       1       1       0      Power off
+//               0       0       0       0      Power off
+
+int bootFromFlash(int serialPort)
+{
+    int status;
+
+    status = ioctl(serialPort, TIOCMBIS, &rtsPin);
+    if (status)
+        fprintf(stderr, "ERROR: Failed to select the boot from flash\n");
+    return status;
+}
+
+int downloadImage(int serialPort)
+{
+    int status;
+
+    status = ioctl(serialPort, TIOCMBIC, &rtsPin);
+    if (status)
+        fprintf(stderr, "ERROR: Failed to select download image\n");
+    return status;
+}
+
+int powerOff(int serialPort)
+{
+    int status;
+
+    status = ioctl(serialPort, TIOCMBIC, &dtrPin);
+    if (status)
+        fprintf(stderr, "ERROR: Failed to power off the ESP-32\n");
+    return status;
+}
+
+int powerOn(int serialPort)
+{
+    int status;
+
+    status = ioctl(serialPort, TIOCMBIS, &dtrPin);
+    if (status)
+        fprintf(stderr, "ERROR: Failed to power on the ESP-32\n");
+    return status;
+}
+
+int main (int argc, const char ** argv)
+{
+    struct termios params;
+    int serialPort;
+    const char * serialPortName;
+    int status;
+
+    serialPort = -1;
+    status = 0;
+    do
+    {
+        // Display the help if necessary
+        if (argc != 2)
+        {
+            status = -1;
+            printf("%s   serial_port\n", argv[0]);
+            break;
+        }
+
+        // Open the serial port
+        serialPortName = argv[1];
+        serialPort = open (serialPortName, O_RDWR);
+        if (serialPort < 0)
+        {
+            status = errno;
+            perror ("ERROR: Failed to open the terminal");
+            break;
+        }
+
+        // Get the terminal attributes
+        if (tcgetattr(serialPort, &params) != 0)
+        {
+            status = errno;
+            perror("ERROR: tcgetattr failed!");
+            break;
+        }
+
+        // Power off the RTK's ESP-32
+        status = powerOff(serialPort);
+        if (status)
+            break;
+        usleep(POWER_OFF_DELAY);
+
+        // Select the boot device
+        status = bootFromFlash(serialPort);
+        if (status)
+            break;
+
+        // Power on the RTK's ESP-32
+        status = powerOn(serialPort);
+    } while (0);
+
+    // Close the terminal
+    if (serialPort >= 0)
+        close(serialPort);
+    return status;
+}

Firmware/Tools/makefile

@@ -10,6 +10,7 @@
 
 EXECUTABLES  = Compare
 EXECUTABLES += NMEA_Client
+EXECUTABLES += RTK_Reset
 EXECUTABLES += Split_Messages
 
 INCLUDES  = crc24q.h