diff --git a/boards/cc1312-launchpad/doc.txt b/boards/cc1312-launchpad/doc.md
similarity index 99%
rename from boards/cc1312-launchpad/doc.txt
rename to boards/cc1312-launchpad/doc.md
index b1a6447971..4ed75991a3 100644
--- a/boards/cc1312-launchpad/doc.txt
+++ b/boards/cc1312-launchpad/doc.md
@@ -1,4 +1,3 @@
-/**
 @defgroup        boards_cc1312_launchpad TI CC1312 LaunchPad
 @ingroup         boards
 @brief           Texas Instruments SimpleLink(TM) CC1312 Wireless MCU LaunchPad(TM) Kit
@@ -59,5 +58,3 @@ Now we can just do `make flash` and `make debug`, this all using OpenOCD.
 For detailed information about CC1312 MCUs as well as configuring, compiling
 RIOT and installation of flashing tools for CC1312 boards,
 see \ref cc26xx_cc13xx_riot.
-
-*/
diff --git a/boards/cc1350-launchpad/doc.txt b/boards/cc1350-launchpad/doc.md
similarity index 99%
rename from boards/cc1350-launchpad/doc.txt
rename to boards/cc1350-launchpad/doc.md
index 9eeedf7db8..da19eca78f 100644
--- a/boards/cc1350-launchpad/doc.txt
+++ b/boards/cc1350-launchpad/doc.md
@@ -1,4 +1,3 @@
-/**
 @defgroup        boards_cc1350_launchpad TI CC1350 LaunchPad XL
 @ingroup         boards
 @brief           Texas Instruments SimpleLink(TM) CC1350 Wireless MCU LaunchPad(TM) Kit
@@ -76,5 +75,3 @@ level shifter when connecting to 5V UART.
 For detailed information about CC1350 MCUs as well as configuring, compiling
 RIOT and installation of flashing tools for CC1350 boards,
 see \ref cc26xx_cc13xx_riot.
-
-*/
diff --git a/boards/cc1352-launchpad/doc.txt b/boards/cc1352-launchpad/doc.md
similarity index 99%
rename from boards/cc1352-launchpad/doc.txt
rename to boards/cc1352-launchpad/doc.md
index 36e2eda0df..d4bf0da1a5 100644
--- a/boards/cc1352-launchpad/doc.txt
+++ b/boards/cc1352-launchpad/doc.md
@@ -1,4 +1,3 @@
-/**
 @defgroup        boards_cc1352_launchpad TI CC1352 LaunchPad
 @ingroup         boards
 @brief           Texas Instruments SimpleLink(TM) CC1352 Wireless MCU LaunchPad(TM) Kit
@@ -75,5 +74,3 @@ level shifter when connecting to 5V UART.
 For detailed information about CC1352R1 MCUs as well as configuring, compiling
 RIOT and installation of flashing tools for CC1352R1 boards,
 see \ref cc26xx_cc13xx_riot.
-
-*/
diff --git a/boards/cc1352p-launchpad/doc.txt b/boards/cc1352p-launchpad/doc.md
similarity index 99%
rename from boards/cc1352p-launchpad/doc.txt
rename to boards/cc1352p-launchpad/doc.md
index 49ee6f72d8..1c75da52de 100644
--- a/boards/cc1352p-launchpad/doc.txt
+++ b/boards/cc1352p-launchpad/doc.md
@@ -1,4 +1,3 @@
-/**
 @defgroup        boards_cc1352p_launchpad TI CC1352P LaunchPad
 @ingroup         boards
 @brief           Texas Instruments SimpleLink(TM) CC1352P Wireless MCU LaunchPad(TM) Kit
@@ -64,6 +63,3 @@ Now we can just do `make flash` and `make debug`, this all using OpenOCD.
 For detailed information about CC1352P MCUs as well as configuring, compiling
 RIOT and installation of flashing tools for CC1352P boards,
 see \ref cc26xx_cc13xx_riot.
-
-
-*/
diff --git a/boards/cc2538dk/doc.txt b/boards/cc2538dk/doc.md
similarity index 99%
rename from boards/cc2538dk/doc.txt
rename to boards/cc2538dk/doc.md
index 8523139bb6..9d873b731e 100644
--- a/boards/cc2538dk/doc.txt
+++ b/boards/cc2538dk/doc.md
@@ -1,4 +1,3 @@
-/**
 @defgroup    boards_cc2538dk CC2538DK
 @ingroup     boards
 @brief       Support for the Texas Instruments CC2538DK board.
@@ -147,4 +146,3 @@ $ sudo kextload /System/Library/Extensions/FTDIUSBSerialDriver.kext
 
 If everything worked, the XDS will be enumerated as
 `/dev/tty.usbserial-<serial-number>`
- */
diff --git a/boards/cc2650-launchpad/doc.txt b/boards/cc2650-launchpad/doc.md
similarity index 99%
rename from boards/cc2650-launchpad/doc.txt
rename to boards/cc2650-launchpad/doc.md
index cb786f7753..b5d54893bc 100644
--- a/boards/cc2650-launchpad/doc.txt
+++ b/boards/cc2650-launchpad/doc.md
@@ -1,4 +1,3 @@
-/**
 @defgroup        boards_cc2650_launchpad TI CC2650 LaunchPad XL
 @ingroup         boards
 @brief           Texas Instruments SimpleLink(TM) CC2650 Wireless MCU LaunchPad(TM) Kit
@@ -59,5 +58,3 @@ Now we can just do `make flash` and `make debug`, this all using OpenOCD.
 For detailed information about CC2650 MCUs as well as configuring, compiling
 RIOT and installation of flashing tools for CC2650 boards,
 see \ref cc26xx_cc13xx_riot.
-
-*/
diff --git a/boards/cc2650stk/doc.txt b/boards/cc2650stk/doc.md
similarity index 99%
rename from boards/cc2650stk/doc.txt
rename to boards/cc2650stk/doc.md
index 1f3f50d4b6..808d9d6a53 100644
--- a/boards/cc2650stk/doc.txt
+++ b/boards/cc2650stk/doc.md
@@ -1,4 +1,3 @@
-/**
 @defgroup    boards_cc2650stk CC2650STK
 @ingroup     boards
 @brief       Support for the SimpleLink™ CC2650 sensor tag
@@ -215,4 +214,3 @@ on all three channels you can create three ble_rop_cmd_t commands and chain them
 via `cmd.pNextOp`.
 3. Send the command to be executed to the RF core via the `rfc_send_cmd()`
 function
- */