Nucleo-F4x1RE: Fix some joystick shield logic

configs/nucleo-f4x1re/README.txt

@@ -393,8 +393,8 @@ Serial Consoles
 
     Nucleo CN10 STM32F4x1RE
     ----------- ------------
-    Pin 21 PA9  USART2_RX
-    Pin 33 PA10 USART2_TX
+    Pin 21 PA9  USART1_RX   *Warning you make need to reverse RX/TX on
+    Pin 33 PA10 USART1_TX    some RS-232 converters
     Pin 20 GND
     Pin 8  U5V
 
@@ -425,8 +425,8 @@ Serial Consoles
 
     Nucleo CN9  STM32F4x1RE
     ----------- ------------
-    Pin 1  PA3  USART2_RX
-    Pin 2  PA2  USART2_TX
+    Pin 1  PA3  USART2_RX   *Warning you make need to reverse RX/TX on
+    Pin 2  PA2  USART2_TX    some RS-232 converters
 
   Solder Bridges.  This configuration requires:
 
@@ -605,8 +605,8 @@ Configurations
 
        Nucleo CN10 STM32F4x1RE
        ----------- ------------
-       Pin 21 PA9  USART1_RX
-       Pin 33 PA10 USART1_TX
+       Pin 21 PA9  USART1_RX   *Warning you make need to reverse RX/TX on
+       Pin 33 PA10 USART1_TX    some RS-232 converters
        Pin 20 GND
        Pin 8  U5V
 

configs/nucleo-f4x1re/src/nucleo-f4x1re.h

@@ -304,4 +304,16 @@ void board_led_initialize(void);
 int board_adc_initialize(void);
 #endif
 
+/****************************************************************************
+ * Name: board_ajoy_initialize
+ *
+ * Description:
+ *   Initialize and register the button joystick driver
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_AJOYSTICK
+int board_ajoy_initialize(void);
+#endif
+
 #endif /* __CONFIGS_NUCLEO_F401RE_SRC_NUCLEO_F401RE_H */

configs/nucleo-f4x1re/src/stm32_adc.c

@@ -59,7 +59,11 @@
 
 /* The number of ADC channels in the conversion list */
 
-#define ADC1_NCHANNELS 2
+#ifdef CONFIG_ADC_DMA
+#  define ADC1_NCHANNELS 2
+#else
+#  define ADC1_NCHANNELS 1
+#endif
 
 /************************************************************************************
  * Private Data
@@ -68,6 +72,7 @@
 
 #ifdef CONFIG_STM32_ADC1
 #ifdef CONFIG_AJOYSTICK
+#ifdef CONFIG_ADC_DMA
 /* The Itead analog joystick gets inputs on ADC_IN0 and ADC_IN1 */
 
 static const uint8_t  g_adc1_chanlist[ADC1_NCHANNELS] = {0, 1};
@@ -75,8 +80,21 @@ static const uint8_t  g_adc1_chanlist[ADC1_NCHANNELS] = {0, 1};
 /* Configurations of pins used byte each ADC channels */
 
 static const uint32_t g_adc1_pinlist[ADC1_NCHANNELS]  = {GPIO_ADC1_IN0, GPIO_ADC1_IN0};
-#endif
-#endif
+
+#else
+/* Without DMA, only a single channel can be supported */
+
+/* The Itead analog joystick gets input on ADC_IN0 */
+
+static const uint8_t  g_adc1_chanlist[ADC1_NCHANNELS] = {0};
+
+/* Configurations of pins used byte each ADC channels */
+
+static const uint32_t g_adc1_pinlist[ADC1_NCHANNELS]  = {GPIO_ADC1_IN0};
+
+#endif /* CONFIG_ADC_DMA */
+#endif /* CONFIG_AJOYSTICK */
+#endif /* CONFIG_STM32_ADC1*/
 
 /************************************************************************************
  * Private Functions

configs/nucleo-f4x1re/src/stm32_ajoystick.c

@@ -73,6 +73,14 @@
 
 #define MAX_ADC_CHANNELS 8
 
+/* Dual channel ADC support requires DMA */
+
+#ifdef CONFIG_ADC_DMA
+#  define NJOYSTICK_CHANNELS 2
+#else
+#  define NJOYSTICK_CHANNELS 1
+#endif
+
 /* Number of Joystick buttons */
 
 #define AJOY_NGPIOS  7
@@ -186,7 +194,7 @@ static int ajoy_sample(FAR const struct ajoy_lowerhalf_s *lower,
 
       return -errcode;
     }
-  else if (nread < 2 * sizeof(struct adc_msg_s))
+  else if (nread < NJOYSTICK_CHANNELS * sizeof(struct adc_msg_s))
     {
       idbg("ERROR: read too small: %ld\n", (long)nread);
       return -EIO;
@@ -194,7 +202,17 @@ static int ajoy_sample(FAR const struct ajoy_lowerhalf_s *lower,
 
   /* Sample and the raw analog inputs */
 
-  for (i = 0, offset = 0, have = 0;
+#ifdef CONFIG_ADC_DMA
+  have = 0;
+
+#else
+  /* If DMA is not supported, then we will have only a single ADC channel */
+
+  have = 2;
+  sample->as_y = 0;
+#endif
+
+  for (i = 0, offset = 0;
        i < MAX_ADC_CHANNELS && offset < nread && have != 3;
        i++, offset += sizeof(struct adc_msg_s))
     {
@@ -211,6 +229,7 @@ static int ajoy_sample(FAR const struct ajoy_lowerhalf_s *lower,
           ivdbg("X sample: %ld -> %d\n", (long)tmp, (int)sample->as_x);
         }
 
+#ifdef CONFIG_ADC_DMA
       if ((have & 2) == 0 && ptr->am_channel == 1)
         {
           int32_t tmp = ptr->am_data;
@@ -219,6 +238,7 @@ static int ajoy_sample(FAR const struct ajoy_lowerhalf_s *lower,
 
           ivdbg("Y sample: %ld -> %d\n", (long)tmp, (int)sample->as_y);
         }
+#endif
     }
 
   if (have != 3)
@@ -388,14 +408,14 @@ static int ajoy_interrupt(int irq, FAR void *context)
  ****************************************************************************/
 
 /****************************************************************************
- * Name: stm32_ajoy_initialization
+ * Name: board_ajoy_initialize
  *
  * Description:
  *   Initialize and register the button joystick driver
  *
  ****************************************************************************/
 
-int stm32_ajoy_initialization(void)
+int board_ajoy_initialize(void)
 {
   int ret;
   int i;

configs/nucleo-f4x1re/src/stm32_nsh.c

@@ -94,7 +94,7 @@ void up_netinitialize(void)
 
 int nsh_archinitialize(void)
 {
-#ifdef HAVE_MMCSD
+#if defined(HAVE_MMCSD) || defined(CONFIG_AJOYSTICK)
   int ret;
 #endif
 
@@ -135,5 +135,18 @@ int nsh_archinitialize(void)
   syslog(LOG_INFO, "[boot] Initialized SDIO\n");
 #endif
 
+#ifdef CONFIG_AJOYSTICK
+  /* Initialize and register the joystick driver */
+
+  ret = board_ajoy_initialize();
+  if (ret != OK)
+    {
+      syslog(LOG_ERR,
+             "ERROR: Failed to register the joystick driver: %d\n",
+             ret);
+      return ret;
+    }
+#endif
+
   return OK;
 }

configs/sama5d3-xplained/src/sam_nsh.c

@@ -152,7 +152,9 @@ int nsh_archinitialize(void)
   ret = sam_ajoy_initialization();
   if (ret != OK)
     {
-      syslog(LOG_ERR, "ERROR: Failed to register the joystick driver: %d\n", ret);
+      syslog(LOG_ERR,
+             "ERROR: Failed to register the joystick driver: %d\n",
+             ret);
       return ret;
     }
 #endif