add save and restore dac value in flash

STM32F072xB.ld

@@ -19,14 +19,14 @@
  */
 MEMORY
 {
-    flash0  : org = 0x08000000, len = 124k
+    flash0  : org = 0x08000000, len = 96k
     flash1  : org = 0x00000000, len = 0
     flash2  : org = 0x00000000, len = 0
     flash3  : org = 0x00000000, len = 0
     flash4  : org = 0x00000000, len = 0
     flash5  : org = 0x00000000, len = 0
     flash6  : org = 0x00000000, len = 0
-    flash7  : org = 0x08018800, len = 30k
+    flash7  : org = 0x08018000, len = 32k
     ram0    : org = 0x20000000, len = 16k
     ram1    : org = 0x00000000, len = 0
     ram2    : org = 0x00000000, len = 0

flash.c

@@ -76,13 +76,57 @@ checksum(void *start, size_t len)
   return value;
 }
 
+
+#define FLASH_PAGESIZE 0x800
+
+const uint32_t save_config_area = 0x08018000;
+
+int
+config_save(void)
+{
+  uint16_t *src = (uint16_t*)&config;
+  uint16_t *dst = save_config_area;
+  int count = sizeof(config_t) / sizeof(uint16_t);
+
+  config.magic = CONFIG_MAGIC;
+  config.checksum = 0;
+  config.checksum = checksum(&config, sizeof config);
+
+  flash_unlock();
+
+  /* erase flash pages */
+  flash_erase_page((uint32_t)dst);
+
+  /* write to flahs */
+  while(count-- > 0) {
+    flash_program_half_word((uint32_t)dst, *src++);
+    dst++;
+  }
+
+  return 0;
+}
+
+int
+config_recall(void)
+{
+  config_t *src = save_config_area;
+  void *dst = &config;
+
+  if (src->magic != CONFIG_MAGIC)
+    return -1;
+  if (checksum(src, sizeof(config_t)) != 0)
+    return -1;
+
+  /* duplicated saved data onto sram to be able to modify marker/trace */
+  memcpy(dst, src, sizeof(config_t));
+  return 0;
+}
+
 #define SAVEAREA_MAX 5
 
 const uint32_t saveareas[] =
   { 0x08018800, 0x0801a000, 0x0801b800, 0x0801d000, 0x0801e8000 };
 
-#define FLASH_PAGESIZE 0x800
-
 int16_t lastsaveid = 0;
 
 

main.c

@@ -156,14 +156,21 @@ static void cmd_dac(BaseSequentialStream *chp, int argc, char *argv[])
     int value;
     if (argc != 1) {
         chprintf(chp, "usage: dac {value(0-4095)}\r\n");
+        chprintf(chp, "current value: %d\r\n", config.dac_value);
         return;
     }
     value = atoi(argv[0]);
+    config.dac_value = value;
     dacPutChannelX(&DACD2, 0, value);
 }
 
-
+static void cmd_saveconfig(BaseSequentialStream *chp, int argc, char *argv[])
-
+{
+  (void)argc;
+  (void)argv;
+  config_save();
+  chprintf(chp, "Config saved.\r\n");
+}
 
 static struct {
   int16_t rms[2];
@@ -1290,6 +1297,7 @@ static const ShellCommand commands[] =
     { "offset", cmd_offset },
     { "time", cmd_time },
     { "dac", cmd_dac },
+    { "saveconfig", cmd_saveconfig },
     { "data", cmd_data },
     { "dump", cmd_dump },
     { "frequencies", cmd_frequencies },
@@ -1325,7 +1333,7 @@ static const I2CConfig i2ccfg = {
   0
 };
 
-static const DACConfig dac1cfg1 = {
+static DACConfig dac1cfg1 = {
   //init:         2047U,
   init:         1922U,
   datamode:     DAC_DHRM_12BIT_RIGHT
@@ -1338,15 +1346,6 @@ int main(void)
 
     chMtxObjectInit(&mutex);
 
-    /*
-     * Starting DAC1 driver, setting up the output pin as analog as suggested
-     * by the Reference Manual.
-     */
-    //palSetPadMode(GPIOA, 5, PAL_MODE_INPUT_ANALOG);
-    //palSetPadMode(GPIOA, 5, PAL_MODE_OUTPUT_PUSHPULL);
-    //palSetPadMode(GPIOA, 5, PAL_MODE_INPUT);
-    dacStart(&DACD2, &dac1cfg1);
-
     //palSetPadMode(GPIOB, 8, PAL_MODE_ALTERNATE(1) | PAL_STM32_OTYPE_OPENDRAIN);
     //palSetPadMode(GPIOB, 9, PAL_MODE_ALTERNATE(1) | PAL_STM32_OTYPE_OPENDRAIN);
     i2cStart(&I2CD1, &i2ccfg);
@@ -1380,7 +1379,17 @@ int main(void)
    */
   plot_init();
 
-  /* restore config and calibration data from flash memory */
+  /* restore config */
+  config_recall();
+
+  dac1cfg1.init = config.dac_value;
+  /*
+   * Starting DAC1 driver, setting up the output pin as analog as suggested
+   * by the Reference Manual.
+   */
+  dacStart(&DACD2, &dac1cfg1);
+
+  /* restore frequencies and calibration properties from flash memory */
   caldata_recall(0);
 
   /* initial frequencies */

nanovna.h

@@ -275,6 +275,9 @@ extern properties_t current_props;
 int caldata_save(int id);
 int caldata_recall(int id);
 
+int config_save(void);
+int config_recall(void);
+
 /*
  * ui.c
  */

ui.c

@@ -354,10 +354,14 @@ menu_calop_cb(int item)
 static void
 menu_caldone_cb(int item)
 {
+  extern const menuitem_t menu_save[];
+  extern const menuitem_t menu_cal[];
   (void)item;
   cal_done();
   draw_cal_status();
   menu_move_back();
+  menu_push_submenu(menu_cal);
+  menu_push_submenu(menu_save);
 }
 
 static void
@@ -550,10 +554,21 @@ const menuitem_t menu_calop[] = {
   { MT_NONE, NULL, NULL } // sentinel
 };
 
+const menuitem_t menu_save[] = {
+  { MT_CALLBACK, "0", menu_save_cb },
+  { MT_CALLBACK, "1", menu_save_cb },
+  { MT_CALLBACK, "2", menu_save_cb },
+  { MT_CALLBACK, "3", menu_save_cb },
+  { MT_CALLBACK, "4", menu_save_cb },
+  { MT_CANCEL, "BACK", NULL },
+  { MT_NONE, NULL, NULL } // sentinel
+};
+
 const menuitem_t menu_cal[] = {
   { MT_CALLBACK, "RESET", menu_cal2_cb },
   { MT_CALLBACK, "OFF", menu_cal2_cb },
   { MT_CALLBACK, "ON", menu_cal2_cb },
+  { MT_SUBMENU, "SAVE", menu_save },
   { MT_CANCEL, "BACK", NULL },
   { MT_NONE, NULL, NULL } // sentinel
 };
@@ -621,7 +636,7 @@ const menuitem_t menu_stimulus[] = {
   { MT_CALLBACK, "STOP", menu_stimulus_cb },
   { MT_CALLBACK, "CENTER", menu_stimulus_cb },
   { MT_CALLBACK, "SPAN", menu_stimulus_cb },
-  { MT_CALLBACK, "CW", menu_stimulus_cb },
+  { MT_CALLBACK, "CW FREQ", menu_stimulus_cb },
   { MT_CALLBACK, "PAUSE", menu_stimulus_cb },
   { MT_CANCEL, "BACK", NULL },
   { MT_NONE, NULL, NULL } // sentinel
@@ -657,23 +672,12 @@ const menuitem_t menu_recall[] = {
   { MT_NONE, NULL, NULL } // sentinel
 };
 
-const menuitem_t menu_save[] = {
-  { MT_CALLBACK, "0", menu_save_cb },
-  { MT_CALLBACK, "1", menu_save_cb },
-  { MT_CALLBACK, "2", menu_save_cb },
-  { MT_CALLBACK, "3", menu_save_cb },
-  { MT_CALLBACK, "4", menu_save_cb },
-  { MT_CANCEL, "BACK", NULL },
-  { MT_NONE, NULL, NULL } // sentinel
-};
-
 const menuitem_t menu_top[] = {
   { MT_SUBMENU, "DISPLAY", menu_display },
   { MT_SUBMENU, "MARKER", menu_marker },
   { MT_SUBMENU, "STIMULUS", menu_stimulus },
   { MT_CALLBACK, "CAL", menu_cal_cb },
   { MT_SUBMENU, "RECALL", menu_recall },
-  { MT_SUBMENU, "SAVE", menu_save },
   { MT_CLOSE, "CLOSE", NULL },
   { MT_NONE, NULL, NULL } // sentinel
 };