bare-metal: Add example for CC2540 USB dongle

This commit adds a simple example for the 8051-based microcontroller
which blinking of the green LED and can be built for different toolchains:

 * IAR EW
 * KEIL uVision

Change-Id: I8c35594884c60b0980f5c8310f87dd0528ab8799
Reviewed-by: Richard Weickelt <richard@weickelt.de>
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

8 files changed, 468 insertions, 1 deletions

diff --git a/examples/baremetal/baremetal.qbs b/examples/baremetal/baremetal.qbs
index 947eba23b..08d41793f 100644
--- a/examples/baremetal/baremetal.qbs
+++ b/examples/baremetal/baremetal.qbs
@@ -54,6 +54,7 @@ Project {
     name: "BareMetal"
     references: [
         "stm32f4discovery/stm32f4discovery.qbs",
-        "at90can128olimex/at90can128olimex.qbs"
+        "at90can128olimex/at90can128olimex.qbs",
+        "cc2540usbdongle/cc2540usbdongle.qbs"
     ]
 }
diff --git a/examples/baremetal/cc2540usbdongle/cc2540usbdongle.qbs b/examples/baremetal/cc2540usbdongle/cc2540usbdongle.qbs
new file mode 100644
index 000000000..52e1948eb
--- /dev/null
+++ b/examples/baremetal/cc2540usbdongle/cc2540usbdongle.qbs
@@ -0,0 +1,58 @@
+/****************************************************************************
+**
+** Copyright (C) 2019 Denis Shienkov <denis.shienkov@gmail.com>
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the examples of Qbs.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+import qbs
+
+Project {
+    name: "Examples for cc2540usbdongle board"
+    references: [
+        "greenblink/greenblink.qbs"
+    ]
+}
diff --git a/examples/baremetal/cc2540usbdongle/greenblink/README.md b/examples/baremetal/cc2540usbdongle/greenblink/README.md
new file mode 100644
index 000000000..4e90293ed
--- /dev/null
+++ b/examples/baremetal/cc2540usbdongle/greenblink/README.md
@@ -0,0 +1,9 @@
+This example demonstrates how to build a bare-metal application using
+different MCS-51 toolchains. It is designed for the CC2540 usb dongle
+target board (based on Texas Instruments CC2540 wireless MCU) and
+simply flashes the green LED on the board.
+
+The following toolchains are supported:
+
+  * IAR Embedded Workbench
+  * KEIL uVision
diff --git a/examples/baremetal/cc2540usbdongle/greenblink/gpio.c b/examples/baremetal/cc2540usbdongle/greenblink/gpio.c
new file mode 100644
index 000000000..a09471460
--- /dev/null
+++ b/examples/baremetal/cc2540usbdongle/greenblink/gpio.c
@@ -0,0 +1,65 @@
+/****************************************************************************
+**
+** Copyright (C) 2019 Denis Shienkov <denis.shienkov@gmail.com>
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the examples of Qbs.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "gpio.h"
+#include "system.h"
+
+#define GPIO_GREEN_LED_PIN_POS   (1u)
+
+void gpio_init_green_led(void)
+{
+    P0SEL = 0; // Choose the port.
+    P0DIR = 0x01; // Set pin0 to output mode.
+}
+
+void gpio_toggle_green_led(void)
+{
+    P0 ^= GPIO_GREEN_LED_PIN_POS;
+}
diff --git a/examples/baremetal/cc2540usbdongle/greenblink/gpio.h b/examples/baremetal/cc2540usbdongle/greenblink/gpio.h
new file mode 100644
index 000000000..ddeccad0e
--- /dev/null
+++ b/examples/baremetal/cc2540usbdongle/greenblink/gpio.h
@@ -0,0 +1,65 @@
+/****************************************************************************
+**
+** Copyright (C) 2019 Denis Shienkov <denis.shienkov@gmail.com>
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the examples of Qbs.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef GPIO_H
+#define GPIO_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void gpio_init_green_led(void);
+void gpio_toggle_green_led(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // GPIO_H
diff --git a/examples/baremetal/cc2540usbdongle/greenblink/greenblink.qbs b/examples/baremetal/cc2540usbdongle/greenblink/greenblink.qbs
new file mode 100644
index 000000000..4dc400404
--- /dev/null
+++ b/examples/baremetal/cc2540usbdongle/greenblink/greenblink.qbs
@@ -0,0 +1,122 @@
+/****************************************************************************
+**
+** Copyright (C) 2019 Denis Shienkov <denis.shienkov@gmail.com>
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the examples of Qbs.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+import qbs
+
+CppApplication {
+    condition: {
+        if (!qbs.architecture.contains("mcs51"))
+            return false;
+        return qbs.toolchain.contains("iar")
+            || qbs.toolchain.contains("keil")
+    }
+    name: "greenblink"
+    cpp.positionIndependentCode: false
+
+    //
+    // IAR-specific properties and sources.
+    //
+
+    Properties {
+        condition: qbs.toolchain.contains("iar")
+        cpp.commonCompilerFlags: ["-e"]
+        cpp.driverLinkerFlags: [
+            "-D_IDATA_STACK_SIZE=0x40",
+            "-D_PDATA_STACK_SIZE=0x00",
+            "-D_XDATA_STACK_SIZE=0x00",
+            "-D_XDATA_HEAP_SIZE=0x00",
+            "-D_EXTENDED_STACK_SIZE=0",
+            "-D_EXTENDED_STACK_START=0"
+        ]
+        cpp.staticLibraries: [
+            cpp.toolchainInstallPath + "/../lib/clib/cl-pli-nsid-1e16x01"
+        ]
+    }
+
+    Group {
+        condition: qbs.toolchain.contains("iar")
+        name: "IAR"
+        prefix: "iar/"
+        Group {
+            name: "Linker Script"
+            prefix: cpp.toolchainInstallPath + "/../config/devices/_generic/"
+            fileTags: ["linkerscript"]
+            files: ["lnk51ew_8051.xcl"]
+        }
+    }
+
+    //
+    // KEIL-specific properties and sources.
+    //
+
+    Properties {
+        condition: qbs.toolchain.contains("keil")
+        cpp.driverLinkerFlags: [
+            "RAMSIZE(256)",
+            "CODE(0x0000-0xFFFF)"
+        ]
+    }
+
+    //
+    // Common code.
+    //
+
+    Group {
+        name: "Gpio"
+        files: ["gpio.c", "gpio.h"]
+    }
+
+    Group {
+        name: "System"
+        files: ["system.h"]
+    }
+
+    files: ["main.c"]
+}
diff --git a/examples/baremetal/cc2540usbdongle/greenblink/main.c b/examples/baremetal/cc2540usbdongle/greenblink/main.c
new file mode 100644
index 000000000..88fae04ad
--- /dev/null
+++ b/examples/baremetal/cc2540usbdongle/greenblink/main.c
@@ -0,0 +1,69 @@
+/****************************************************************************
+**
+** Copyright (C) 2019 Denis Shienkov <denis.shienkov@gmail.com>
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the examples of Qbs.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "gpio.h"
+#include "system.h"
+
+static void some_delay(unsigned long counts)
+{
+    unsigned long index = 0u;
+    for (index = 0u; index < counts; ++index)
+       system_nop();
+}
+
+int main(void)
+{
+    gpio_init_green_led();
+
+    while (1) {
+        gpio_toggle_green_led();
+        some_delay(20000u);
+    }
+}
diff --git a/examples/baremetal/cc2540usbdongle/greenblink/system.h b/examples/baremetal/cc2540usbdongle/greenblink/system.h
new file mode 100644
index 000000000..0b5027bf9
--- /dev/null
+++ b/examples/baremetal/cc2540usbdongle/greenblink/system.h
@@ -0,0 +1,78 @@
+/****************************************************************************
+**
+** Copyright (C) 2019 Denis Shienkov <denis.shienkov@gmail.com>
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the examples of Qbs.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef SYSTEM_H
+#define SYSTEM_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if defined(__ICC8051__)
+#include <intrinsics.h>
+# define system_nop() __no_operation()
+# define SFR(name,addr) __sfr __no_init volatile unsigned char name @ addr;
+#elif defined (__C51__)
+#include <intrins.h>
+# define system_nop() _nop_()
+# define SFR(name, addr) sfr name = addr;
+#else
+#error "Unsupported toolchain"
+#endif
+
+SFR(P0   , 0x80u) // Port 0.
+SFR(P0SEL, 0xF3u) // Port 0 function select.
+SFR(P0DIR, 0xFDu) // Port 0 direction select.
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // SYSTEM_H