Sweep DAC on PA4 added

NANOVNA_STM32_F072/board.h

@@ -128,7 +128,7 @@
                                      PIN_MODE_INPUT(1U) |           \
                                      PIN_MODE_INPUT(2U) |  			\
                                      PIN_MODE_INPUT(3U) |   		\
-                                     PIN_MODE_INPUT(4U) | \
+                                     PIN_MODE_ANALOG(4U) | \
                                      PIN_MODE_INPUT(5U) | \
                                      PIN_MODE_ANALOG(GPIOA_XP) |    \
                                      PIN_MODE_ANALOG(GPIOA_YP) |    \
@@ -160,7 +160,7 @@
                                      PIN_OSPEED_2M(1) |          \
                                      PIN_OSPEED_2M(2) |       \
                                      PIN_OSPEED_2M(3) |       \
-                                     PIN_OSPEED_100M(4) |          \
+                                     PIN_OSPEED_2M(4) |          \
                                      PIN_OSPEED_100M(5) |           \
                                      PIN_OSPEED_2M(6) |          \
                                      PIN_OSPEED_2M(7) |          \
@@ -176,7 +176,7 @@
                                      PIN_PUPDR_PULLDOWN(1) | \
                                      PIN_PUPDR_PULLDOWN(2) | \
                                      PIN_PUPDR_PULLDOWN(3) | \
-                                     PIN_PUPDR_PULLDOWN(4) |         \
+                                     PIN_PUPDR_FLOATING(4) |         \
                                      PIN_PUPDR_PULLDOWN(5) |         \
                                      PIN_PUPDR_FLOATING(6) |         \
                                      PIN_PUPDR_FLOATING(7) |         \

main.c

@@ -2710,12 +2710,12 @@ static const I2CConfig i2ccfg = {
   .cr1 = 0,     // CR1 register initialization.
   .cr2 = 0      // CR2 register initialization.
 };
+#endif
 static DACConfig dac1cfg1 = {
   //init:         2047U,
   init:         1922U,
   datamode:     DAC_DHRM_12BIT_RIGHT
 };
-#endif
 
 #pragma GCC pop_options
 
@@ -2861,15 +2861,13 @@ int main(void)
  */
   shell_init_connection();
 
-/* restore frequencies and calibration 0 slot properties from flash memory */
-#ifdef __VNA__
-  dac1cfg1.init = config.dac_value;
+  dac1cfg1.init = 0;
+
 /*
  * Starting DAC1 driver, setting up the output pin as analog as suggested
  * by the Reference Manual.
  */
   dacStart(&DACD2, &dac1cfg1);
-#endif
   setupSA();
   set_sweep_points(POINTS_COUNT);
 

sa_core.c

@@ -2171,6 +2171,8 @@ sweep_again:                                // stay in sweep loop when output mo
       return false;
     }
 
+    dacPutChannelX(&DACD2, 0, i*14);        // Output sweep voltage
+
     // ----------------------- in loop AGC ---------------------------------
 
 #ifdef __SI4432__