diff --git a/hal/arm/Makefile b/hal/arm/Makefile
index c0be07d5..0542551b 100644
--- a/hal/arm/Makefile
+++ b/hal/arm/Makefile
@@ -7,4 +7,4 @@
 # TODO handle other common ARM stuff (e.g GIC) and
 # select relevant components here
 
-OBJS += $(addprefix $(PREFIX_O)hal/arm/, nvic.o scb.o)
+OBJS += $(addprefix $(PREFIX_O)hal/arm/, nvic.o scb.o rtt.o)
diff --git a/hal/arm/rtt.c b/hal/arm/rtt.c
new file mode 100644
index 00000000..96ed5646
--- /dev/null
+++ b/hal/arm/rtt.c
@@ -0,0 +1,154 @@
+/*
+ * Phoenix-RTOS
+ *
+ * SEGGER's Real Time Transfer - simplified driver
+ *
+ * Copyright 2023-2024 Phoenix Systems
+ * Author: Gerard Swiderski, Daniel Sawka
+ *
+ * This file is part of Phoenix-RTOS.
+ *
+ * %LICENSE%
+ */
+
+#include "include/errno.h"
+#include "syspage.h"
+#include "hal/arm/barriers.h"
+
+#include <board_config.h>
+#include "rtt.h"
+
+#ifndef RTT_SYSPAGE_MAP_NAME
+#define RTT_SYSPAGE_MAP_NAME "rtt"
+#endif
+
+#ifndef RTT_CB_SIZE
+#define RTT_CB_SIZE 256
+#endif
+
+
+struct rtt_pipe {
+	const char *name;
+	volatile unsigned char *ptr;
+	unsigned int sz;
+	volatile unsigned int wr;
+	volatile unsigned int rd;
+	unsigned int flags;
+};
+
+
+struct rtt_desc {
+	char tag[16];
+	unsigned int txChannels;
+	unsigned int rxChannels;
+	struct rtt_pipe channels[];
+};
+
+
+static struct {
+	volatile struct rtt_desc *rtt;
+} common;
+
+
+static int rtt_check(unsigned int chan, rtt_dir_t dir)
+{
+	if ((dir == rtt_dir_up) && (chan >= common.rtt->txChannels)) {
+		return -ENODEV;
+	}
+
+	if ((dir == rtt_dir_down) && (chan >= common.rtt->rxChannels)) {
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+
+int _hal_rttWrite(unsigned int chan, const void *buf, unsigned int count)
+{
+	unsigned int sz;
+	unsigned int rd;
+	unsigned int wr;
+	unsigned int todo;
+	volatile unsigned char *dstBuf;
+
+	if (rtt_check(chan, rtt_dir_up) < 0) {
+		return -ENODEV;
+	}
+
+	hal_cpuDataMemoryBarrier();
+	dstBuf = common.rtt->channels[chan].ptr;
+	sz = common.rtt->channels[chan].sz - 1;
+	rd = (common.rtt->channels[chan].rd + sz) & sz;
+	wr = common.rtt->channels[chan].wr & sz;
+	todo = count;
+
+	/* TODO: Support all buffer modes (currently only trim is used, regardless of flags) */
+	while ((todo != 0) && (rd != wr)) {
+		dstBuf[wr] = *(unsigned char *)buf++;
+		wr = (wr + 1) & sz;
+		todo--;
+	}
+
+	hal_cpuDataMemoryBarrier();
+	common.rtt->channels[chan].wr = wr;
+
+	return count - todo;
+}
+
+
+int _hal_rttTxAvail(unsigned int chan)
+{
+	unsigned int sz;
+	unsigned int rd;
+	unsigned int wr;
+
+	if (rtt_check(chan, rtt_dir_up) < 0) {
+		return -ENODEV;
+	}
+
+	hal_cpuDataMemoryBarrier();
+	sz = common.rtt->channels[chan].sz - 1;
+	rd = (common.rtt->channels[chan].rd + sz) & sz;
+	wr = common.rtt->channels[chan].wr & sz;
+
+	if (wr > rd) {
+		return sz + 1 - (wr - rd);
+	}
+	else {
+		return rd - wr;
+	}
+}
+
+
+int _hal_rttReset(unsigned int chan, rtt_dir_t dir)
+{
+	if (rtt_check(chan, dir) < 0) {
+		return -ENODEV;
+	}
+
+	hal_cpuDataMemoryBarrier();
+	if (dir == rtt_dir_up) {
+		common.rtt->channels[chan].wr = common.rtt->channels[chan].rd;
+	}
+	else {
+		chan = common.rtt->txChannels + chan;
+		common.rtt->channels[chan].rd = common.rtt->channels[chan].wr;
+	}
+	hal_cpuDataMemoryBarrier();
+	return 0;
+}
+
+
+int _hal_rttInit(void)
+{
+	const syspage_map_t *map = syspage_mapNameResolve(RTT_SYSPAGE_MAP_NAME);
+
+	if (map == NULL) {
+		return -ENOENT;
+	}
+
+	/* TODO: Place CB always at the start of the map? */
+	common.rtt = (void *)(map->end - RTT_CB_SIZE);
+	return 0;
+}
diff --git a/hal/arm/rtt.h b/hal/arm/rtt.h
new file mode 100644
index 00000000..fa6ffe81
--- /dev/null
+++ b/hal/arm/rtt.h
@@ -0,0 +1,47 @@
+/*
+ * Phoenix-RTOS
+ *
+ * SEGGER's Real Time Transfer - simplified driver
+ *
+ * Copyright 2023-2024 Phoenix Systems
+ * Author: Gerard Swiderski, Daniel Sawka
+ *
+ * This file is part of Phoenix-RTOS.
+ *
+ * %LICENSE%
+ */
+
+#ifndef HAL_ARM_RTT_H_
+#define HAL_ARM_RTT_H_
+
+
+typedef enum {
+	rtt_dir_up,   /* tx: target -> host */
+	rtt_dir_down, /* rx: host -> target */
+} rtt_dir_t;
+
+
+typedef enum {
+	rtt_mode_skip = 0,     /* write if the whole message can be written at once; discard the message otherwise */
+	rtt_mode_trim = 1,     /* write anything if possible; discard the remaining unwritten data otherwise */
+	rtt_mode_blocking = 2, /* wait until writable */
+} rtt_mode_t;
+
+
+/* Initialize rtt internal structures */
+int _hal_rttInit(void);
+
+
+/* Non-blocking write to channel */
+int _hal_rttWrite(unsigned int chan, const void *buf, unsigned int count);
+
+
+/* Check for available space in tx */
+int _hal_rttTxAvail(unsigned int chan);
+
+
+/* Reset fifo pointers */
+int _hal_rttReset(unsigned int chan, rtt_dir_t dir);
+
+
+#endif /* end of HAL_ARM_RTT_H_ */
diff --git a/hal/armv7m/imxrt/10xx/console.c b/hal/armv7m/imxrt/10xx/console.c
index 266eb129..09df6e7d 100644
--- a/hal/armv7m/imxrt/10xx/console.c
+++ b/hal/armv7m/imxrt/10xx/console.c
@@ -3,7 +3,7 @@
  *
  * Operating system kernel
  *
- * HAL console (iMXRT USART)
+ * HAL console (iMXRT USART + RTT)
  *
  * Copyright 2016-2017 Phoenix Systems
  * Author: Pawel Pisarczyk, Artur Wodejko, Aleksander Kaminski
@@ -14,21 +14,35 @@
  */
 
 #include "hal/console.h"
+#include "hal/arm/rtt.h"
 #include "include/arch/armv7m/imxrt/10xx/imxrt10xx.h"
 #include "imxrt10xx.h"
+#include "lib/helpers.h"
 #include <arch/cpu.h>
 
 #include <board_config.h>
 
-#ifndef UART_CONSOLE
-#define UART_CONSOLE 1
+#ifndef UART_CONSOLE_KERNEL
+#ifdef UART_CONSOLE
+#define UART_CONSOLE_KERNEL UART_CONSOLE
+#else
+#define UART_CONSOLE_KERNEL 1
+#endif
+#endif
+
+#ifndef RTT_CONSOLE_KERNEL
+#if RTT_ENABLED
+#define RTT_CONSOLE_KERNEL 0
+#else
+#define RTT_CONSOLE_KERNEL
+#endif
 #endif
 
 #define CONCAT3(a, b, c) a##b##c
 #define CONSOLE_BAUD(n)  (CONCAT3(UART, n, _BAUDRATE))
 
-#if CONSOLE_BAUD(UART_CONSOLE)
-#define CONSOLE_BAUDRATE CONSOLE_BAUD(UART_CONSOLE)
+#if !ISEMPTY(UART_CONSOLE_KERNEL) && CONSOLE_BAUD(UART_CONSOLE_KERNEL)
+#define CONSOLE_BAUDRATE CONSOLE_BAUD(UART_CONSOLE_KERNEL)
 #else
 #define CONSOLE_BAUDRATE 115200
 #endif
@@ -63,16 +77,23 @@ void hal_consolePrint(int attr, const char *s)
 
 void hal_consolePutch(char c)
 {
+#if RTT_ENABLED && !ISEMPTY(RTT_CONSOLE_KERNEL)
+	_hal_rttWrite(RTT_CONSOLE_KERNEL, &c, 1);
+#endif
+
+#if !ISEMPTY(UART_CONSOLE_KERNEL)
 	while (!(*(console_common.uart + uart_stat) & (1 << 23)))
 		;
 
 	*(console_common.uart + uart_data) = c;
+#endif
 }
 
 
-void _hal_consoleInit(void)
+#if !ISEMPTY(UART_CONSOLE_KERNEL)
+static void _hal_uartInit(void)
 {
-	u32 t, console = UART_CONSOLE - 1;
+	u32 t, console = UART_CONSOLE_KERNEL - 1;
 
 	static const struct {
 		volatile u32 *base;
@@ -155,3 +176,16 @@ void _hal_consoleInit(void)
 	/* Enable TX and RX */
 	*(console_common.uart + uart_ctrl) |= (1 << 19) | (1 << 18);
 }
+#endif
+
+
+void _hal_consoleInit(void)
+{
+#if RTT_ENABLED && !ISEMPTY(RTT_CONSOLE_KERNEL)
+	_hal_rttInit();
+#endif
+
+#if !ISEMPTY(UART_CONSOLE_KERNEL)
+	_hal_uartInit();
+#endif
+}
diff --git a/hal/armv7m/imxrt/117x/console.c b/hal/armv7m/imxrt/117x/console.c
index 146edac8..cb021560 100644
--- a/hal/armv7m/imxrt/117x/console.c
+++ b/hal/armv7m/imxrt/117x/console.c
@@ -3,7 +3,7 @@
  *
  * Operating system kernel
  *
- * HAL console (i.MX RT1170 UART)
+ * HAL console (i.MX RT1170 UART + RTT)
  *
  * Copyright 2016-2017, 2019 Phoenix Systems
  * Author: Pawel Pisarczyk, Artur Wodejko, Aleksander Kaminski
@@ -14,21 +14,35 @@
  */
 
 #include "hal/console.h"
+#include "hal/arm/rtt.h"
 #include "include/arch/armv7m/imxrt/11xx/imxrt1170.h"
 #include "imxrt117x.h"
+#include "lib/helpers.h"
 #include <arch/cpu.h>
 
 #include <board_config.h>
 
-#ifndef UART_CONSOLE
-#define UART_CONSOLE 11
+#ifndef UART_CONSOLE_KERNEL
+#ifdef UART_CONSOLE
+#define UART_CONSOLE_KERNEL UART_CONSOLE
+#else
+#define UART_CONSOLE_KERNEL 11
+#endif
+#endif
+
+#ifndef RTT_CONSOLE_KERNEL
+#if RTT_ENABLED
+#define RTT_CONSOLE_KERNEL 0
+#else
+#define RTT_CONSOLE_KERNEL
+#endif
 #endif
 
 #define CONCAT3(a, b, c) a##b##c
 #define CONSOLE_BAUD(n)  (CONCAT3(UART, n, _BAUDRATE))
 
-#if CONSOLE_BAUD(UART_CONSOLE)
-#define CONSOLE_BAUDRATE CONSOLE_BAUD(UART_CONSOLE)
+#if !ISEMPTY(UART_CONSOLE_KERNEL) && CONSOLE_BAUD(UART_CONSOLE_KERNEL)
+#define CONSOLE_BAUDRATE CONSOLE_BAUD(UART_CONSOLE_KERNEL)
 #else
 #define CONSOLE_BAUDRATE 115200
 #endif
@@ -63,16 +77,23 @@ void hal_consolePrint(int attr, const char *s)
 
 void hal_consolePutch(char c)
 {
+#if RTT_ENABLED && !ISEMPTY(RTT_CONSOLE_KERNEL)
+	_hal_rttWrite(RTT_CONSOLE_KERNEL, &c, 1);
+#endif
+
+#if !ISEMPTY(UART_CONSOLE_KERNEL)
 	while (!(*(console_common.uart + uart_stat) & (1 << 23)))
 		;
 
 	*(console_common.uart + uart_data) = c;
+#endif
 }
 
 
-void _hal_consoleInit(void)
+#if !ISEMPTY(UART_CONSOLE_KERNEL)
+static void _hal_uartInit(void)
 {
-	u32 t, console = UART_CONSOLE - 1;
+	u32 t, console = UART_CONSOLE_KERNEL - 1;
 
 	static const struct {
 		volatile u32 *base;
@@ -156,3 +177,16 @@ void _hal_consoleInit(void)
 	/* Enable TX and RX */
 	*(console_common.uart + uart_ctrl) |= (1 << 19) | (1 << 18);
 }
+#endif
+
+
+void _hal_consoleInit(void)
+{
+#if RTT_ENABLED && !ISEMPTY(RTT_CONSOLE_KERNEL)
+	_hal_rttInit();
+#endif
+
+#if !ISEMPTY(UART_CONSOLE_KERNEL)
+	_hal_uartInit();
+#endif
+}
diff --git a/lib/helpers.h b/lib/helpers.h
new file mode 100644
index 00000000..1f2c3342
--- /dev/null
+++ b/lib/helpers.h
@@ -0,0 +1,35 @@
+/*
+ * Phoenix-RTOS
+ *
+ * Generic useful macros
+ *
+ * Copyright 2024 Phoenix Systems
+ * Author: Daniel Sawka
+ *
+ * %LICENSE%
+ */
+
+#ifndef _LIB_HELPERS_H_
+#define _LIB_HELPERS_H_
+
+/*
+These macros should only be used in `#if` and `#elif` directives, because undefined identifiers expand to 0 there.
+Otherwise there will be "use of undefined identifier" errors (an exception: identifier is first checked for
+existence with e.g. `#ifdef`).
+
+Anything that expands to a numerical expression (or to an empty value) is fine. String literals don't work.
+*/
+
+/*
+These macros produce a logically correct result only if X is defined. You may use `#ifdef` or `defined()`
+for this purpose. Unfortunately, `defined()` cannot be conveniently put inside a macro as this is undefined
+behavior (see -Wexpansion-to-defined for details), so you have to use it directly on the spot, for example:
+`#if defined(PERIPH1) && !ISEMPTY(PERIPH1)
+// Use PERIPH1
+#endif`
+*/
+
+/* True if X is empty (has no value). The result in #if is valid only if defined(X) is true */
+#define ISEMPTY(X) ((0 - X - 1) == 1 && (X + 0) != -2)
+
+#endif