diff --git a/contrib/loaders/flash/numicro_m4/Makefile b/contrib/loaders/flash/numicro_m4/Makefile
new file mode 100644
index 000000000..0f9c507cd
--- /dev/null
+++ b/contrib/loaders/flash/numicro_m4/Makefile
@@ -0,0 +1,31 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+BIN2C = ../../../../src/helper/bin2char.sh
+
+CROSS_COMPILE ?= arm-none-eabi-
+
+CC=$(CROSS_COMPILE)gcc
+OBJCOPY=$(CROSS_COMPILE)objcopy
+OBJDUMP=$(CROSS_COMPILE)objdump
+
+
+AFLAGS = -static -nostartfiles -mlittle-endian -mcpu=cortex-m4 -Wa,-EL
+
+all: numicro_m4.inc
+
+.PHONY: clean
+
+%.elf: %.S
+	$(CC) $(AFLAGS) $< -o $@
+
+%.lst: %.elf
+	$(OBJDUMP) -S $< > $@
+
+%.bin: %.elf
+	$(OBJCOPY) -Obinary $< $@
+
+%.inc: %.bin
+	$(BIN2C) < $< > $@
+
+clean:
+	-rm -f *.elf *.lst *.bin *.inc
diff --git a/contrib/loaders/flash/numicro_m4/numicro_m4.S b/contrib/loaders/flash/numicro_m4/numicro_m4.S
new file mode 100644
index 000000000..6c59cca57
--- /dev/null
+++ b/contrib/loaders/flash/numicro_m4/numicro_m4.S
@@ -0,0 +1,70 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+/***************************************************************************
+ *   Copyright (C) 2017 Zale Yu                                            *
+ *   CYYU@nuvoton.com                                                      *
+ *                                                                         *
+ *   Copyright (C) 2022 Jian-Hong Pan                                      *
+ *   chienhung.pan@gmail.com                                               *
+ ***************************************************************************/
+
+	.text
+	.cpu cortex-m4
+	.thumb
+
+	/* Params:
+	 * r0 - workarea buffer / result
+	 * r1 - target address
+	 * r2 - wordcount
+	 * Clobbered:
+	 * r4 - tmp
+	 * r5 - tmp
+	 * r6 - tmp
+	 * r7 - tmp
+	 */
+
+.L1:
+	/* for(register uint32_t i=0;i<wcount;i++){ */
+	mov	r4, r0
+	mov	r3, #0
+.L2:
+	sub	r5, r1, r0
+	add	r7, r4, r5
+	cmp	r3, r2
+	beq	.L7
+.L4:
+	/* NUMICRO_FLASH_ISPADR = faddr; */
+	ldr	r6, .L8
+	str	r7, [r6]
+	/* NUMICRO_FLASH_ISPDAT = *pLW; */
+	ldmia	r4!, {r7}
+	ldr	r5, .L8+4
+	str	r7, [r5]
+	/* faddr += 4; */
+	/* pLW++; */
+	/*  Trigger write action  */
+	/* NUMICRO_FLASH_ISPTRG = ISPTRG_ISPGO; */
+	ldr	r5, .L8+8
+	mov	r6, #1
+	str	r6, [r5]
+.L3:
+	/* while((NUMICRO_FLASH_ISPTRG & ISPTRG_ISPGO) == ISPTRG_ISPGO){}; */
+	ldr	r7, [r5]
+	lsl	r7, r7, #31
+	bmi	.L3
+
+	add	r3, r3, #1
+	b	.L2
+.L7:
+	/* return (NUMICRO_FLASH_ISPCON & ISPCON_ISPFF); */
+	ldr	r3, .L8+12
+	ldr	r0, [r3]
+	mov	r1, #64
+	and	r0, r1
+.L9:
+	bkpt	#0
+.L8:
+	.word	0x4000C004
+	.word	0x4000C008
+	.word	0x4000C010
+	.word	0x4000C000
diff --git a/contrib/loaders/flash/numicro_m4/numicro_m4.inc b/contrib/loaders/flash/numicro_m4/numicro_m4.inc
new file mode 100644
index 000000000..c3e605292
--- /dev/null
+++ b/contrib/loaders/flash/numicro_m4/numicro_m4.inc
@@ -0,0 +1,5 @@
+/* Autogenerated with ../../../../src/helper/bin2char.sh */
+0x04,0x1c,0x00,0x23,0x0d,0x1a,0x67,0x19,0x93,0x42,0x0c,0xd0,0x08,0x4e,0x37,0x60,
+0x80,0xcc,0x08,0x4d,0x2f,0x60,0x08,0x4d,0x01,0x26,0x2e,0x60,0x2f,0x68,0xff,0x07,
+0xfc,0xd4,0x01,0x33,0xee,0xe7,0x05,0x4b,0x18,0x68,0x40,0x21,0x08,0x40,0x00,0xbe,
+0x04,0xc0,0x00,0x40,0x08,0xc0,0x00,0x40,0x10,0xc0,0x00,0x40,0x00,0xc0,0x00,0x40,
diff --git a/src/flash/nor/numicro.c b/src/flash/nor/numicro.c
index 2bba7b746..cbd2450b0 100644
--- a/src/flash/nor/numicro.c
+++ b/src/flash/nor/numicro.c
@@ -740,62 +740,7 @@ static const uint8_t numicro_flash_write_code[] = {
 };
 
 static const uint8_t numicro_m4_flash_write_code[] = {
-	/* Params:
-	* r0 - workarea buffer / result
-	* r1 - target address
-	* r2 - wordcount
-	* Clobbered:
-	* r4 - tmp
-	* r5 - tmp
-	* r6 - tmp
-	* r7 - tmp
-	*/
-
-	/* .L1: */
-	/* for(register uint32_t i=0;i<wcount;i++){ */
-	0x04, 0x1C,				/* mov    r4, r0          */
-	0x00, 0x23,				/* mov    r3, #0          */
-	/* .L2: */
-	0x0D, 0x1A,				/* sub    r5, r1, r0      */
-	0x67, 0x19,				/* add    r7, r4, r7      */
-	0x93, 0x42,				/* cmp	  r3, r2		  */
-	0x0C, 0xD0,				/* beq    .L7             */
-	/* .L4: */
-	/* NUMICRO_FLASH_ISPADR = faddr; */
-	0x08, 0x4E,				/* ldr	r6, .L8           */
-	0x37, 0x60,				/* str	r7, [r6]          */
-	/* NUMICRO_FLASH_ISPDAT = *pLW; */
-	0x80, 0xCC,				/* ldmia	r4!, {r7}     */
-	0x08, 0x4D,				/* ldr	r5, .L8+4         */
-	0x2F, 0x60,				/* str	r7, [r5]		  */
-	/* faddr += 4; */
-	/* pLW++; */
-	/*  Trigger write action  */
-	/* NUMICRO_FLASH_ISPTRG = ISPTRG_ISPGO; */
-	0x08, 0x4D,				/* ldr	r5, .L8+8         */
-	0x01, 0x26,				/* mov	r6, #1            */
-	0x2E, 0x60,				/* str	r6, [r5]          */
-	/* .L3: */
-	/* while((NUMICRO_FLASH_ISPTRG & ISPTRG_ISPGO) == ISPTRG_ISPGO){}; */
-	0x2F, 0x68,				/* ldr	r7, [r5]          */
-	0xFF, 0x07,				/* lsl	r7, r7, #31       */
-	0xFC, 0xD4,				/* bmi	.L3               */
-
-	0x01, 0x33,				/* add	r3, r3, #1        */
-	0xEE, 0xE7,				/* b	.L2               */
-	/* .L7: */
-	/* return (NUMICRO_FLASH_ISPCON & ISPCON_ISPFF); */
-	0x05, 0x4B,				/* ldr	r3, .L8+12        */
-	0x18, 0x68,				/* ldr	r0, [r3]          */
-	0x40, 0x21,				/* mov	r1, #64           */
-	0x08, 0x40,				/* and	r0, r1            */
-	/* .L9: */
-	0x00, 0xBE,				/* bkpt    #0             */
-	/* .L8: */
-	0x04, 0xC0, 0x00, 0x40,/* .word	0x4000C004    */
-	0x08, 0xC0, 0x00, 0x40,/* .word	0x4000C008    */
-	0x10, 0xC0, 0x00, 0x40,/* .word	0x4000C010    */
-	0x00, 0xC0, 0x00, 0x40 /* .word	0x4000C000    */
+#include "../../../contrib/loaders/flash/numicro_m4/numicro_m4.inc"
 };
 
 /* Program LongWord Block Write */