stm32/stm32_adc.c: add an option to configure ANIOC_TRIGGER behavior

arch/arm/src/stm32/Kconfig

@@ -8199,6 +8199,16 @@ config STM32_ADC1_DMA_CFG
 	---help---
 		0 - ADC1 DMA in One Shot Mode, 1 - ADC1 DMA in Circular Mode
 
+config STM32_ADC1_ANIOC_TRIGGER
+	int "ADC1 software trigger (ANIOC_TRIGGER) configuration"
+	depends on STM32_ADC1
+	range 1 3
+	default 3
+	---help---
+		1 - ANIOC_TRIGGER only starts regular conversion
+		2 - ANIOC_TRIGGER only starts injected conversion
+		3 - ANIOC_TRIGGER starts both regular and injected conversions
+
 config STM32_ADC2_DMA
 	bool "ADC2 DMA"
 	depends on STM32_ADC2 && STM32_HAVE_ADC2_DMA
@@ -8222,6 +8232,16 @@ config STM32_ADC2_DMA_CFG
 	---help---
 		0 - ADC2 DMA in One Shot Mode, 1 - ADC2 DMA in Circular Mode
 
+config STM32_ADC2_ANIOC_TRIGGER
+	int "ADC2 software trigger (ANIOC_TRIGGER) configuration"
+	depends on STM32_ADC2
+	range 1 3
+	default 3
+	---help---
+		1 - ANIOC_TRIGGER only starts regular conversion
+		2 - ANIOC_TRIGGER only starts injected conversion
+		3 - ANIOC_TRIGGER starts both regular and injected conversions
+
 config STM32_ADC3_DMA
 	bool "ADC3 DMA"
 	depends on STM32_ADC3 && STM32_HAVE_ADC3_DMA
@@ -8245,6 +8265,16 @@ config STM32_ADC3_DMA_CFG
 	---help---
 		0 - ADC3 DMA in One Shot Mode, 1 - ADC3 DMA in Circular Mode
 
+config STM32_ADC3_ANIOC_TRIGGER
+	int "ADC3 software trigger (ANIOC_TRIGGER) configuration"
+	depends on STM32_ADC3
+	range 1 3
+	default 3
+	---help---
+		1 - ANIOC_TRIGGER only starts regular conversion
+		2 - ANIOC_TRIGGER only starts injected conversion
+		3 - ANIOC_TRIGGER starts both regular and injected conversions
+
 config STM32_ADC4_DMA
 	bool "ADC4 DMA"
 	depends on STM32_ADC4 && STM32_HAVE_ADC4_DMA
@@ -8262,6 +8292,16 @@ config STM32_ADC4_DMA_CFG
 	---help---
 		0 - ADC4 DMA in One Shot Mode, 1 - ADC4 DMA in Circular Mode
 
+config STM32_ADC4_ANIOC_TRIGGER
+	int "ADC4 software trigger (ANIOC_TRIGGER) configuration"
+	depends on STM32_ADC4
+	range 1 3
+	default 3
+	---help---
+		1 - ANIOC_TRIGGER only starts regular conversion
+		2 - ANIOC_TRIGGER only starts injected conversion
+		3 - ANIOC_TRIGGER starts both regular and injected conversions
+
 config STM32_ADC5_DMA
 	bool "ADC5 DMA"
 	depends on STM32_ADC5 && STM32_HAVE_ADC5_DMA

arch/arm/src/stm32/stm32_adc.c

@@ -377,6 +377,11 @@
 #  undef ADC_HAVE_CB
 #endif
 
+/* ADC software trigger configuration */
+
+#define ANIOC_TRIGGER_REGULAR  (1 << 0)
+#define ANIOC_TRIGGER_INJECTED (1 << 1)
+
 /****************************************************************************
  * Private Types
  ****************************************************************************/
@@ -416,6 +421,7 @@ struct stm32_dev_s
   uint8_t intf;              /* ADC interface number */
   uint8_t initialized;       /* ADC interface initialization counter */
   uint8_t current;           /* Current ADC channel being converted */
+  uint8_t anioc_trg;         /* ANIOC_TRIGGER configuration */
 #ifdef HAVE_ADC_RESOLUTION
   uint8_t resolution;        /* ADC resolution (0-3) */
 #endif
@@ -766,6 +772,7 @@ static struct stm32_dev_s g_adcpriv1 =
 #endif
   .intf        = 1,
   .initialized = 0,
+  .anioc_trg   = CONFIG_STM32_ADC1_ANIOC_TRIGGER,
 #ifdef HAVE_ADC_RESOLUTION
   .resolution  = CONFIG_STM32_ADC1_RESOLUTION,
 #endif
@@ -825,6 +832,7 @@ static struct stm32_dev_s g_adcpriv2 =
 #endif
   .intf        = 2,
   .initialized = 0,
+  .anioc_trg   = CONFIG_STM32_ADC2_ANIOC_TRIGGER,
 #ifdef HAVE_ADC_RESOLUTION
   .resolution  = CONFIG_STM32_ADC2_RESOLUTION,
 #endif
@@ -884,6 +892,7 @@ static struct stm32_dev_s g_adcpriv3 =
 #endif
   .intf        = 3,
   .initialized = 0,
+  .anioc_trg   = CONFIG_STM32_ADC3_ANIOC_TRIGGER,
 #ifdef HAVE_ADC_RESOLUTION
   .resolution  = CONFIG_STM32_ADC3_RESOLUTION,
 #endif
@@ -936,6 +945,7 @@ static struct stm32_dev_s g_adcpriv4 =
 #endif
   .intf        = 4,
   .initialized = 0,
+  .anioc_trg   = CONFIG_STM32_ADC4_ANIOC_TRIGGER,
 #ifdef HAVE_ADC_RESOLUTION
   .resolution  = CONFIG_STM32_ADC4_RESOLUTION,
 #endif
@@ -3820,17 +3830,23 @@ static int adc_ioctl(FAR struct adc_dev_s *dev, int cmd, unsigned long arg)
         {
           /* Start regular conversion if regular channels configured */
 
-          if (priv->cr_channels > 0)
+          if (priv->anioc_trg & ANIOC_TRIGGER_REGULAR)
             {
-              adc_reg_startconv(priv, true);
+              if (priv->cr_channels > 0)
+                {
+                  adc_reg_startconv(priv, true);
+                }
             }
 
 #ifdef ADC_HAVE_INJECTED
           /* Start injected conversion if injected channels configured */
 
-          if (priv->cj_channels > 0)
+          if (priv->anioc_trg & ANIOC_TRIGGER_INJECTED)
             {
-              adc_inj_startconv(priv, true);
+              if (priv->cj_channels > 0)
+                {
+                  adc_inj_startconv(priv, true);
+                }
             }
 #endif