rs232: support several channels

Target/Source/ARMCM3_STM32F1/rs232.c

@@ -44,6 +44,8 @@
 #define RS232_CTO_RX_PACKET_TIMEOUT_MS (100u)
 /** \brief Timeout for transmitting a byte in milliseconds. */
 #define RS232_BYTE_TX_TIMEOUT_MS       (10u)
+
+#ifndef BOOT_COM_RS232_CHANNELS_N
 /* map the configured UART channel index to the STM32's USART peripheral */
 #if (BOOT_COM_RS232_CHANNEL_INDEX == 0)
 /** \brief Set UART base address to USART1. */
@@ -55,7 +57,13 @@
 /** \brief Set UART base address to USART3. */
 #define USART_CHANNEL   USART3
 #endif
+#endif
 
+#ifdef BOOT_COM_RS232_CHANNELS_N
+/* const */ USART_TypeDef *Rs232ChannelDevs[BOOT_COM_RS232_CHANNELS_N] = BOOT_COM_RS232_CHANNEL_DEVS;
+
+USART_TypeDef *USART_CHANNEL =  BOOT_COM_RS232_CHANNEL_DEFAULT_DEV; //(USART_TypeDef *)Rs232ChannelDevs[0];
+#endif
 
 /****************************************************************************************
 * Function prototypes
@@ -63,6 +71,19 @@
 static blt_bool Rs232ReceiveByte(blt_int8u *data);
 static void     Rs232TransmitByte(blt_int8u data);
 
+#ifdef BOOT_COM_RS232_CHANNELS_N
+blt_bool Rs232Switch(blt_int8u channel)
+{
+  if (channel >= BOOT_COM_RS232_CHANNELS_N)
+  {
+    return BLT_FALSE;
+  }
+
+  USART_CHANNEL = Rs232ChannelDevs[channel];
+
+  return BLT_TRUE;
+}
+#endif
 
 /************************************************************************************//**
 ** \brief     Initializes the RS232 communication interface.
@@ -73,12 +94,14 @@ void Rs232Init(void)
 {
   LL_USART_InitTypeDef USART_InitStruct;
 
+#ifndef BOOT_COM_RS232_CHANNELS_N
   /* the current implementation supports USART1 - USART5. throw an assertion error in
    * case a different UART channel is configured.
    */
   ASSERT_CT((BOOT_COM_RS232_CHANNEL_INDEX == 0) ||
             (BOOT_COM_RS232_CHANNEL_INDEX == 1) ||
             (BOOT_COM_RS232_CHANNEL_INDEX == 2));
+#endif
 
   /* disable the UART peripheral */
   LL_USART_Disable(USART_CHANNEL);

Target/Source/com.c

@@ -50,6 +50,9 @@
 ****************************************************************************************/
 /** \brief Holds the communication interface of the currently active interface. */
 static tComInterfaceId comActiveInterface = COM_IF_OTHER;
+#ifdef BOOT_COM_RS232_CHANNELS_N
+static blt_int8s Rs232ActiveInterface = -1;
+#endif
 
 
 /************************************************************************************//**
@@ -69,8 +72,21 @@ void ComInit(void)
   comActiveInterface = COM_IF_CAN;
 #endif
 #if (BOOT_COM_RS232_ENABLE > 0)
-  /* initialize the RS232 interface */
+  /* initialize the RS232 interface(s) */
+#ifdef BOOT_COM_RS232_CHANNELS_N
+  {
+    blt_int8u i;
+    for (i = 0; i < BOOT_COM_RS232_CHANNELS_N; i++)
+    {
+      if (Rs232Switch(i) == BLT_TRUE)
+      {
+        Rs232Init();
+      }
+    }
+  }
+#else
   Rs232Init();
+#endif
   /* set it as active */
   comActiveInterface = COM_IF_RS232;
 #endif
@@ -113,6 +129,34 @@ void ComTask(void)
   }
 #endif
 #if (BOOT_COM_RS232_ENABLE > 0)
+#ifdef BOOT_COM_RS232_CHANNELS_N
+  if (Rs232ActiveInterface != -1) {
+    if (Rs232ReceivePacket(&xcpCtoReqPacket[0], &xcpPacketLen) == BLT_TRUE)
+    {
+      /* make this the active interface */
+      comActiveInterface = COM_IF_RS232;
+      /* process packet */
+      XcpPacketReceived(&xcpCtoReqPacket[0], xcpPacketLen);
+    }
+  }
+  else
+  {
+    blt_int8u i;
+    for (i = 0; i < BOOT_COM_RS232_CHANNELS_N; i++)
+    {
+      if ((Rs232Switch(i) == BLT_TRUE) &&
+          (Rs232ReceivePacket(&xcpCtoReqPacket[0], &xcpPacketLen) == BLT_TRUE))
+      {
+        /* make this the active interface */
+        comActiveInterface = COM_IF_RS232;
+        Rs232ActiveInterface = i;
+        /* process packet */
+        XcpPacketReceived(&xcpCtoReqPacket[0], xcpPacketLen);
+        break;
+      }
+    }
+  }
+#else
   if (Rs232ReceivePacket(&xcpCtoReqPacket[0], &xcpPacketLen) == BLT_TRUE)
   {
     /* make this the active interface */
@@ -121,6 +165,7 @@ void ComTask(void)
     XcpPacketReceived(&xcpCtoReqPacket[0], xcpPacketLen);
   }
 #endif
+#endif
 #if (BOOT_COM_USB_ENABLE > 0)
   if (UsbReceivePacket(&xcpCtoReqPacket[0], &xcpPacketLen) == BLT_TRUE)
   {

Target/Source/plausibility.h

@@ -195,6 +195,7 @@
 #error "BOOT_COM_RS232_RX_MAX_DATA must be <= 255"
 #endif
 
+#ifndef BOOT_COM_RS232_CHANNELS_N
 #ifndef BOOT_COM_RS232_CHANNEL_INDEX
 #error "BOOT_COM_RS232_CHANNEL_INDEX is missing in blt_conf.h"
 #endif
@@ -202,6 +203,7 @@
 #if (BOOT_COM_RS232_CHANNEL_INDEX < 0)
 #error "BOOT_COM_RS232_CHANNEL_INDEX must be >= 0"
 #endif
+#endif
 
 #endif /* BOOT_COM_RS232_ENABLE > 0 */
 

Target/Source/rs232.h

@@ -32,6 +32,9 @@
 /****************************************************************************************
 * Function prototypes
 ****************************************************************************************/
+#ifdef BOOT_COM_RS232_CHANNELS_N
+blt_bool Rs232Switch(blt_int8u channel);
+#endif
 void     Rs232Init(void);
 void     Rs232TransmitPacket(blt_int8u *data, blt_int8u len);
 blt_bool Rs232ReceivePacket(blt_int8u *data, blt_int8u *len);