diff --git a/demos/ARM7-AT91SAM7X-GCC/Makefile b/demos/ARM7-AT91SAM7X-GCC/Makefile
index 4622e181f..34f5ff8b2 100644
--- a/demos/ARM7-AT91SAM7X-GCC/Makefile
+++ b/demos/ARM7-AT91SAM7X-GCC/Makefile
@@ -53,8 +53,9 @@ CSRC = ${PORTSRC} \
        ${KERNSRC} \
        ${TESTSRC} \
        ../../os/io/pal.c \
-       ../../os/ports/GCC/ARM7/AT91SAM7X/pal_lld.c \
-       ../../os/ports/GCC/ARM7/AT91SAM7X/sam7x_serial.c \
+       ../../os/io/serial.c \
+       ../../os/io/platforms/AT91SAM7X/pal_lld.c \
+       ../../os/io/platforms/AT91SAM7X/serial_lld.c \
        at91lib/aic.c \
        board.c main.c
 
@@ -88,8 +89,9 @@ ASMSRC = $(PORTASM) \
 
 INCDIR = $(PORTINC) $(KERNINC) $(TESTINC) \
          ../../os/io \
-         ../../os/ports/GCC/ARM7/AT91SAM7X \
-         ../../os/various
+         ../../os/io/platforms/AT91SAM7X \
+         ../../os/various \
+         ../../os/ports/GCC/ARM7/AT91SAM7X
 
 #
 # Project, sources and paths
diff --git a/demos/ARM7-AT91SAM7X-GCC/board.c b/demos/ARM7-AT91SAM7X-GCC/board.c
index aac51cf0c..fb52c8f3b 100644
--- a/demos/ARM7-AT91SAM7X-GCC/board.c
+++ b/demos/ARM7-AT91SAM7X-GCC/board.c
@@ -19,12 +19,11 @@
 
 #include <ch.h>
 #include <pal.h>
+#include <serial.h>
 
 #include "board.h"
 #include "at91lib/aic.h"
 
-#include <sam7x_serial.h>
-
 /*
  * FIQ Handler weak symbol defined in vectors.s.
  */
@@ -169,7 +168,7 @@ void hwinit1(void) {
   /*
    * Serial driver initialization, RTS/CTS pins enabled for USART0 only.
    */
-  serial_init(AT91C_AIC_PRIOR_HIGHEST - 2, AT91C_AIC_PRIOR_HIGHEST - 2);
+  sdInit();
   AT91C_BASE_PIOA->PIO_PDR   = AT91C_PA3_RTS0 | AT91C_PA4_CTS0;
   AT91C_BASE_PIOA->PIO_ASR   = AT91C_PIO_PA3 | AT91C_PIO_PA4;
   AT91C_BASE_PIOA->PIO_PPUDR = AT91C_PIO_PA3 | AT91C_PIO_PA4;
diff --git a/demos/ARM7-AT91SAM7X-GCC/main.c b/demos/ARM7-AT91SAM7X-GCC/main.c
index 614b649cd..d1ca61cc7 100644
--- a/demos/ARM7-AT91SAM7X-GCC/main.c
+++ b/demos/ARM7-AT91SAM7X-GCC/main.c
@@ -19,10 +19,10 @@
 
 #include <ch.h>
 #include <pal.h>
+#include <serial.h>
 #include <test.h>
 
 #include "board.h"
-#include <sam7x_serial.h>
 
 static WORKING_AREA(waThread1, 64);
 static msg_t Thread1(void *arg) {
@@ -42,6 +42,11 @@ static msg_t Thread1(void *arg) {
  */
 int main(int argc, char **argv) {
 
+  /*
+   * Activates the communication port 1 using the driver default configuration.
+   */
+  sdStart(&COM1, NULL);
+
   /*
    * Creates the blinker thread.
    */
@@ -53,7 +58,7 @@ int main(int argc, char **argv) {
   while (TRUE) {
     chThdSleepMilliseconds(500);
     if (!palReadPad(IOPORT_B, PIOB_SW1))
-      chFDDWrite(&COM1, (uint8_t *)"Hello World!\r\n", 14);
+      sdWrite(&COM1, (uint8_t *)"Hello World!\r\n", 14);
     if (!palReadPad(IOPORT_B, PIOB_SW2))
       TestThread(&COM1);
   }
diff --git a/os/io/platforms/AT91SAM7X/serial_lld.c b/os/io/platforms/AT91SAM7X/serial_lld.c
index 40b00483d..e053aac13 100644
--- a/os/io/platforms/AT91SAM7X/serial_lld.c
+++ b/os/io/platforms/AT91SAM7X/serial_lld.c
@@ -29,8 +29,21 @@
 
 #include "at91lib/aic.h"
 
+#if USE_SAM7X_USART0 || defined(__DOXYGEN__)
+/** @brief USART0 serial driver identifier.*/
+SerialDriver COM1;
+#endif
+
+#if USE_SAM7X_USART1 || defined(__DOXYGEN__)
+/** @brief USART1 serial driver identifier.*/
+SerialDriver COM2;
+#endif
+
 /** @brief Driver default configuration.*/
 static const SerialDriverConfig default_config = {
+  38400,
+  AT91C_US_USMODE_NORMAL | AT91C_US_CLKS_CLOCK |
+  AT91C_US_CHRL_8_BITS | AT91C_US_PAR_NONE | AT91C_US_NBSTOP_1_BIT
 };
 
 /*===========================================================================*/
@@ -69,13 +82,106 @@ void usart_init(AT91PS_USART u, const SerialDriverConfig *config) {
  */
 void usart_deinit(AT91PS_USART u) {
 
+  /* Disables IRQ sources and stop operations.*/
+  u->US_IDR = 0xFFFFFFFF;
+  u->US_CR = AT91C_US_RSTRX | AT91C_US_RSTTX | AT91C_US_RSTSTA;
+  u->US_MR = 0;
+  u->US_RTOR = 0;
+  u->US_TTGR = 0;
 }
 
+/**
+ * @brief Error handling routine.
+ * @param[in] err USART CSR register value
+ * @param[in] sdp communication channel associated to the USART
+ */
+static void set_error(AT91_REG csr, SerialDriver *sdp) {
+  sdflags_t sts = 0;
+
+  if (csr & AT91C_US_OVRE)
+    sts |= SD_OVERRUN_ERROR;
+  if (csr & AT91C_US_PARE)
+    sts |= SD_PARITY_ERROR;
+  if (csr & AT91C_US_FRAME)
+    sts |= SD_FRAMING_ERROR;
+  if (csr & AT91C_US_RXBRK)
+    sts |= SD_BREAK_DETECTED;
+  chSysLockFromIsr();
+  sdAddFlagsI(sdp, sts);
+  chSysUnlockFromIsr();
+}
+
+#if defined(__GNU__)
+__attribute__((noinline))
+#endif
+/**
+ * @brief Common IRQ handler.
+ * @param[in] u pointer to an USART I/O block
+ * @param[in] com communication channel associated to the USART
+ */
+static void serve_interrupt(AT91PS_USART u, SerialDriver *sdp) {
+
+  if (u->US_CSR & AT91C_US_RXRDY) {
+    chSysLockFromIsr();
+    sdIncomingDataI(sdp, u->US_RHR);
+    chSysUnlockFromIsr();
+  }
+  if (u->US_CSR & AT91C_US_TXRDY) {
+    chSysLockFromIsr();
+    msg_t b = sdRequestDataI(sdp);
+    chSysUnlockFromIsr();
+    if (b < Q_OK)
+      u->US_IDR = AT91C_US_TXRDY;
+    else
+      u->US_THR = b;
+  }
+  if (u->US_CSR & (AT91C_US_OVRE | AT91C_US_FRAME | AT91C_US_PARE | AT91C_US_RXBRK)) {
+    set_error(u->US_CSR, sdp);
+    u->US_CR = AT91C_US_RSTSTA;
+  }
+  AT91C_BASE_AIC->AIC_EOICR = 0;
+}
+
+#if USE_SAM7X_USART0 || defined(__DOXYGEN__)
+static void notify1(void) {
+
+  AT91C_BASE_US0->US_IER = AT91C_US_TXRDY;
+}
+#endif
+
+#if USE_SAM7X_USART1 || defined(__DOXYGEN__)
+static void notify2(void) {
+
+  AT91C_BASE_US1->US_IER = AT91C_US_TXRDY;
+}
+#endif
 
 /*===========================================================================*/
 /* Low Level Driver interrupt handlers.                                      */
 /*===========================================================================*/
 
+#if USE_SAM7X_USART0 || defined(__DOXYGEN__)
+CH_IRQ_HANDLER(USART0IrqHandler) {
+
+  CH_IRQ_PROLOGUE();
+
+  serve_interrupt(AT91C_BASE_US0, &COM1);
+
+  CH_IRQ_EPILOGUE();
+}
+#endif
+
+#if USE_SAM7X_USART1 || defined(__DOXYGEN__)
+CH_IRQ_HANDLER(USART1IrqHandler) {
+
+  CH_IRQ_PROLOGUE();
+
+  serve_interrupt(AT91C_BASE_US1, &COM2);
+
+  CH_IRQ_EPILOGUE();
+}
+#endif
+
 /*===========================================================================*/
 /* Low Level Driver exported functions.                                      */
 /*===========================================================================*/
@@ -85,6 +191,25 @@ void usart_deinit(AT91PS_USART u) {
  */
 void sd_lld_init(void) {
 
+#if USE_SAM7X_USART0
+  sdObjectInit(&COM1, NULL, notify1);
+  AT91C_BASE_PIOA->PIO_PDR   = AT91C_PA0_RXD0 | AT91C_PA1_TXD0;
+  AT91C_BASE_PIOA->PIO_ASR   = AT91C_PIO_PA0 | AT91C_PIO_PA1;
+  AT91C_BASE_PIOA->PIO_PPUDR = AT91C_PIO_PA0 | AT91C_PIO_PA1;
+  AIC_ConfigureIT(AT91C_ID_US0,
+                  AT91C_AIC_SRCTYPE_HIGH_LEVEL | SAM7X_USART0_PRIORITY,
+                  USART0IrqHandler);
+#endif
+
+#if USE_SAM7X_USART1
+  sdObjectInit(&COM2, NULL, notify2);
+  AT91C_BASE_PIOA->PIO_PDR   = AT91C_PA5_RXD1 | AT91C_PA6_TXD1;
+  AT91C_BASE_PIOA->PIO_ASR   = AT91C_PIO_PA5 | AT91C_PIO_PA6;
+  AT91C_BASE_PIOA->PIO_PPUDR = AT91C_PIO_PA5 | AT91C_PIO_PA6;
+  AIC_ConfigureIT(AT91C_ID_US1,
+                  AT91C_AIC_SRCTYPE_HIGH_LEVEL | SAM7X_USART1_PRIORITY,
+                  USART1IrqHandler);
+#endif
 }
 
 /**
@@ -100,6 +225,28 @@ void sd_lld_start(SerialDriver *sdp, const SerialDriverConfig *config) {
   if (config == NULL)
     config = &default_config;
 
+#if USE_SAM7X_USART0
+  if (&COM1 == sdp) {
+    /* Starts the clock and clears possible sources of immediate interrupts.*/
+    AT91C_BASE_PMC->PMC_PCER = (1 << AT91C_ID_US0);
+    /* USART initialization.*/
+    usart_init(AT91C_BASE_US0, config);
+    /* Enables associated interrupt vector.*/
+    AIC_EnableIT(AT91C_ID_US0);
+    return;
+  }
+#endif
+#if USE_SAM7X_USART1
+  if (&COM2 == sdp) {
+    /* Starts the clock and clears possible sources of immediate interrupts.*/
+    AT91C_BASE_PMC->PMC_PCER = (1 << AT91C_ID_US1);
+    /* USART initialization.*/
+    usart_init(AT91C_BASE_US1, config);
+    /* Enables associated interrupt vector.*/
+    AIC_EnableIT(AT91C_ID_US1);
+    return;
+  }
+#endif
 }
 
 /**
@@ -111,6 +258,22 @@ void sd_lld_start(SerialDriver *sdp, const SerialDriverConfig *config) {
  */
 void sd_lld_stop(SerialDriver *sdp) {
 
+#if USE_LPC214x_UART1
+  if (&COM1 == sdp) {
+    usart_deinit(AT91C_BASE_US0);
+    AT91C_BASE_PMC->PMC_PCDR = (1 << AT91C_ID_US0);
+    AIC_DisableIT(AT91C_ID_US0);
+    return;
+  }
+#endif
+#if USE_LPC214x_UART2
+  if (&COM2 == sdp) {
+    usart_deinit(AT91C_BASE_US1);
+    AT91C_BASE_PMC->PMC_PCDR = (1 << AT91C_ID_US1);
+    AIC_DisableIT(AT91C_ID_US1);
+    return;
+  }
+#endif
 }
 
 /** @} */
diff --git a/os/io/platforms/AT91SAM7X/serial_lld.h b/os/io/platforms/AT91SAM7X/serial_lld.h
index dfd41398d..6156c3933 100644
--- a/os/io/platforms/AT91SAM7X/serial_lld.h
+++ b/os/io/platforms/AT91SAM7X/serial_lld.h
@@ -59,6 +59,20 @@
 #define USE_SAM7X_USART1 TRUE
 #endif
 
+/**
+ * @brief UART1 interrupt priority level setting.
+ */
+#if !defined(SAM7X_USART0_PRIORITY) || defined(__DOXYGEN__)
+#define SAM7X_USART0_PRIORITY (AT91C_AIC_PRIOR_HIGHEST - 2)
+#endif
+
+/**
+ * @brief UART2 interrupt priority level setting.
+ */
+#if !defined(SAM7X_USART1_PRIORITY) || defined(__DOXYGEN__)
+#define SAM7X_USART1_PRIORITY (AT91C_AIC_PRIOR_HIGHEST - 2)
+#endif
+
 /*===========================================================================*/
 /* Unsupported event flags and custom events.                                */
 /*===========================================================================*/
@@ -124,11 +138,11 @@ typedef struct {
 /*===========================================================================*/
 
 /** @cond never*/
-#if !defined(USE_SAM7X_USART0)
-extern FullDuplexDriver COM1;
+#if defined(USE_SAM7X_USART0)
+extern SerialDriver COM1;
 #endif
-#if !defined(USE_SAM7X_USART1)
-extern FullDuplexDriver COM2;
+#if defined(USE_SAM7X_USART1)
+extern SerialDriver COM2;
 #endif
 
 #ifdef __cplusplus
diff --git a/os/io/platforms/LPC214x/serial_lld.h b/os/io/platforms/LPC214x/serial_lld.h
index 04328e64b..b543d844c 100644
--- a/os/io/platforms/LPC214x/serial_lld.h
+++ b/os/io/platforms/LPC214x/serial_lld.h
@@ -89,7 +89,6 @@
 #define LPC214x_UART2_PRIORITY   2
 #endif
 
-
 /*===========================================================================*/
 /* Unsupported event flags and custom events.                                */
 /*===========================================================================*/