boards: arm: Add stm32f072-eval board support

Add the STM32F072-EVAL Board minimal support.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>

boards/arm/stm32f072_eval/CMakeLists.txt

@@ -0,0 +1,3 @@
+zephyr_library()
+zephyr_library_sources(pinmux.c)
+zephyr_library_include_directories(${PROJECT_SOURCE_DIR}/drivers)

boards/arm/stm32f072_eval/Kconfig.board

@@ -0,0 +1,10 @@
+# Kconfig - STM32F072-EVAL board configuration
+#
+# Copyright (c) 2017 BayLibre, SAS
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+config BOARD_STM32F072_EVAL
+	bool "STM32F072-EVAL Development Board"
+	depends on SOC_STM32F072XB

boards/arm/stm32f072_eval/Kconfig.defconfig

@@ -0,0 +1,20 @@
+# Kconfig - STM32F072-EVAL board configuration
+#
+# Copyright (c) 2017 BayLibre, SAS
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+if BOARD_STM32F072_EVAL
+
+config BOARD
+	default stm32f072_eval
+
+if UART_CONSOLE
+
+config UART_STM32_PORT_2
+	default y
+
+endif # UART_CONSOLE
+
+endif # BOARD_STM32F072_EVAL

boards/arm/stm32f072_eval/board.cmake

@@ -0,0 +1 @@
+include(${ZEPHYR_BASE}/boards/common/openocd.board.cmake)

boards/arm/stm32f072_eval/board.h

@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2017 BayLibre, SAS
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef __INC_BOARD_H
+#define __INC_BOARD_H
+
+#include <soc.h>
+
+/* TAMPER push button */
+#define TAMPER_PB_GPIO_PORT	"GPIOC"
+#define TAMPER_PB_GPIO_PIN	13
+
+/* Joystick Right push button */
+#define JOYSTICK_RIGHT_PB_GPIO_PORT	"GPIOE"
+#define JOYSTICK_RIGHT_PB_GPIO_PIN	3
+
+/* Joystick Left push button */
+#define JOYSTICK_LEFT_PB_GPIO_PORT	"GPIOF"
+#define JOYSTICK_LEFT_PB_GPIO_PIN	2
+
+/* Joystick UP push button */
+#define JOYSTICK_UP_PB_GPIO_PORT	"GPIOF"
+#define JOYSTICK_UP_PB_GPIO_PIN		9
+
+/* Joystick Down push button */
+#define JOYSTICK_DOWN_PB_GPIO_PORT	"GPIOF"
+#define JOYSTICK_DOWN_PB_GPIO_PIN	10
+
+/* Joystick Sel push button */
+#define JOYSTICK_SEL_PB_GPIO_PORT	"GPIOA"
+#define JOYSTICK_SEL_PB_GPIO_PIN	0
+
+/* LD1 green LED */
+#define LD1_GPIO_PORT	"GPIOD"
+#define LD1_GPIO_PIN	8
+
+/* LD2 orange LED */
+#define LD2_GPIO_PORT	"GPIOD"
+#define LD2_GPIO_PIN	9
+
+/* LD3 red LED */
+#define LD3_GPIO_PORT	"GPIOD"
+#define LD3_GPIO_PIN	10
+
+/* LD4 blue LED */
+#define LD4_GPIO_PORT	"GPIOD"
+#define LD4_GPIO_PIN	11
+
+/* Create aliases to make the basic samples work */
+#define SW0_GPIO_NAME	TAMPER_PB_GPIO_PORT
+#define SW0_GPIO_PIN	TAMPER_PB_GPIO_PIN
+#define LED0_GPIO_PORT	LD1_GPIO_PORT
+#define LED0_GPIO_PIN	LD1_GPIO_PIN
+#define LED1_GPIO_PORT	LD2_GPIO_PORT
+#define LED1_GPIO_PIN	LD2_GPIO_PIN
+
+#endif /* __INC_BOARD_H */

boards/arm/stm32f072_eval/doc/stm32f072_eval.rst

@@ -0,0 +1,195 @@
+.. _stm32f072_eval_board:
+
+ST STM32F072-EVAL
+###################
+
+Overview
+********
+
+The STM32F072-EVAL Discovery kit features an ARM Cortex-M0 based STM32F072VBT6 MCU
+with a wide range of connectivity support and configurations.
+Here are some highlights of the STM32F072-EVAL board:
+
+- Four 5 V power supply options: power jack, ST-LINK/V2 USB connector, user USB connector, or daughter board
+- Stereo audio jack, which supports a headset with microphone connected to DAC and ADC of STM32F072VBT6.
+- 2G Byte (or more) SPI interface MicroSD card
+- I2C compatible serial interface temperature sensor
+- RF E2PROM
+- RS232 and RS485 communication
+- IrDA transceiver
+- IR LED and IR receiver
+- SWD debug support, ST-LINK/V2 embedded
+- 240x320 TFT color LCD connected to SPI interface of STM32F072VBT6
+- Joystick with 4-direction control and selector
+- Reset and tamper buttons
+- Four color user LEDs and two LEDs as MCU low power alarm
+- Extension connector for daughter board or wrapping board
+- MCU voltage choice: fixed 3.3 V or adjustable from 1.65 V to 3.6 V
+- USB full-speed connector
+- Touch sensing buttons
+- RTC with backup battery
+- CAN2.0A/B compliant connector
+- Light Dependent Resistor (LDR)
+- Potentiometer
+- Two HDMI connectors with DDC and CEC
+- Smart Card slot
+- Motor control connector
+
+
+.. image:: img/stm32f072_eval.jpg
+     :width: 540px
+     :align: center
+     :height: 549px
+     :alt: STM32F072-EVAL
+
+More information about the board can be found at the `STM32F072-EVAL website`_.
+
+Hardware
+********
+
+STM32F072-EVAL Discovery kit provides the following hardware components:
+
+- STM32F072VBT6 in LQFP100 package
+- ARM |reg| 32-bit Cortex |reg| -M0 CPU
+- 48 MHz max CPU frequency
+- VDD from 2.0 V to 3.6 V
+- 128 KB Flash
+- 16 KB SRAM with HW parity
+- GPIO with external interrupt capability
+- one 12-bit ADC with 16 channels
+- one 12-bit D/A converters with 2 channels
+- RTC
+- Advanced-control Timer
+- General Purpose Timers (8)
+- Watchdog Timers (2)
+- USART (4)
+- I2C (2)
+- SPI (2)
+- CAN
+- USB 2.0 OTG FS with on-chip PHY
+- CRC calculation unit
+- DMA Controller
+- HDMI CEC Controller
+- 24 capacitive sensing channels for touchkey, linear, and rotary touch sensors
+- Up to 87 fast I/Os: 68 I/Os with 5V tolerant capability and 19 with independent supply
+
+More information about STM32F072VB can be found here:
+       - `STM32F072VB on www.st.com`_
+       - `STM32F072 reference manual`_
+
+Supported Features
+==================
+
+The Zephyr stm32f072_eval board configuration supports the following hardware features:
+
++-----------+------------+-------------------------------------+
+| Interface | Controller | Driver/Component                    |
++===========+============+=====================================+
+| NVIC      | on-chip    | nested vector interrupt controller  |
++-----------+------------+-------------------------------------+
+| UART      | on-chip    | serial port-polling;                |
+|           |            | serial port-interrupt               |
++-----------+------------+-------------------------------------+
+| PINMUX    | on-chip    | pinmux                              |
++-----------+------------+-------------------------------------+
+| GPIO      | on-chip    | gpio                                |
++-----------+------------+-------------------------------------+
+| PWM       | on-chip    | pwm                                 |
++-----------+------------+-------------------------------------+
+| CLOCK     | on-chip    | reset and clock control             |
++-----------+------------+-------------------------------------+
+| IWDG      | on-chip    | independent watchdog                |
++-----------+------------+-------------------------------------+
+
+Other hardware features are not yet supported on this Zephyr porting.
+
+The default configuration can be found in the defconfig file:
+
+	``boards/arm/stm32f072_eval/stm32f072_eval_defconfig``
+
+
+Pin Mapping
+===========
+
+STM32F072-EVAL Discovery kit has 6 GPIO controllers. These controllers are responsible for pin muxing,
+input/output, pull-up, etc.
+
+For mode details please refer to `STM32F072-EVAL board User Manual`_.
+
+Default Zephyr Peripheral Mapping:
+----------------------------------
+- UART_2_TX : PD5
+- UART_2_RX : PD6
+- TAMPER_PB : PC13
+- JOYSTICK_RIGHT_PB : PE3
+- JOYSTICK_LEFT_PB : PF2
+- JOYSTICK_UP_PB : PF9
+- JOYSTICK_DOWN_PB : PF10
+- JOYSTICK_SEL_PB : PA0
+- LD1 : PD8
+- LD2 : PD9
+- LD3 : PD10
+- LD4 : PD11
+
+System Clock
+============
+
+STM32F072-EVAL System Clock could be driven by an internal or external oscillator,
+as well as the main PLL clock. By default the System clock is driven by the PLL clock at 48MHz,
+driven by an 8MHz high speed internal clock.
+
+Serial Port
+===========
+
+STM32F072-EVAL Discovery kit has up to 4 UARTs. The Zephyr console output is assigned to UART2.
+Default settings are 115200 8N1.
+
+Programming and Debugging
+*************************
+
+Applications for the ``stm32f072_eval`` board configuration can be built and
+flashed in the usual way (see :ref:`build_an_application` and
+:ref:`application_run` for more details).
+
+Flashing
+========
+
+STM32F072-EVAL Discovery kit includes an ST-LINK/V2 embedded debug tool interface.
+This interface is supported by the openocd version included in Zephyr SDK.
+
+Flashing an application to STM32F072-EVAL
+-------------------------------------------
+
+Here is an example for the :ref:`blinky-sample` application.
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/basic/blinky
+   :board: stm32f072_eval
+   :goals: build flash
+
+You will see the LED blinking every second.
+
+Debugging
+=========
+
+You can debug an application in the usual way.  Here is an example for the
+:ref:`blinky-sample` application.
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/basic/blinky
+   :board: stm32f072_eval
+   :maybe-skip-config:
+   :goals: debug
+
+
+.. _STM32F072-EVAL website:
+   http://www.st.com/en/evaluation-tools/stm32072b-eval.html
+
+.. _STM32F072-EVAL board User Manual:
+   http://www.st.com/resource/en/user_manual/dm00104135.pdf
+
+.. _STM32F072VB on www.st.com:
+   http://www.st.com/en/microcontrollers/stm32f072vb.html
+
+.. _STM32F072 reference manual:
+   http://www.st.com/resource/en/reference_manual/dm00031936.pdf

boards/arm/stm32f072_eval/dts.fixup

@@ -0,0 +1,14 @@
+/* This file is a temporary workaround for mapping of the generated information
+ * to the current driver definitions.  This will be removed when the drivers
+ * are modified to handle the generated information, or the mapping of
+ * generated data matches the driver definitions.
+ */
+
+
+#define CONFIG_NUM_IRQ_PRIO_BITS	ARM_V6M_NVIC_E000E100_ARM_NUM_IRQ_PRIORITY_BITS
+
+#define CONFIG_UART_STM32_PORT_2_BASE_ADDRESS	ST_STM32_USART_40004400_BASE_ADDRESS
+#define CONFIG_UART_STM32_PORT_2_BAUD_RATE	ST_STM32_USART_40004400_CURRENT_SPEED
+#define CONFIG_UART_STM32_PORT_2_IRQ_PRI	ST_STM32_USART_40004400_IRQ_0_PRIORITY
+#define CONFIG_UART_STM32_PORT_2_NAME		ST_STM32_USART_40004400_LABEL
+#define PORT_2_IRQ				ST_STM32_USART_40004400_IRQ_0

boards/arm/stm32f072_eval/pinmux.c

@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2017 BayLibre, SAS
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <kernel.h>
+#include <device.h>
+#include <init.h>
+#include <pinmux.h>
+#include <sys_io.h>
+
+#include "pinmux/stm32/pinmux_stm32.h"
+
+/* pin assignments for STM32F072-EVAL board */
+static const struct pin_config pinconf[] = {
+#ifdef CONFIG_UART_STM32_PORT_2
+	{STM32_PIN_PD5, STM32F0_PINMUX_FUNC_PD5_USART2_TX},
+	{STM32_PIN_PD6, STM32F0_PINMUX_FUNC_PD6_USART2_RX},
+#endif	/* CONFIG_UART_STM32_PORT_2 */
+};
+
+static int pinmux_stm32_init(struct device *port)
+{
+	ARG_UNUSED(port);
+
+	stm32_setup_pins(pinconf, ARRAY_SIZE(pinconf));
+
+	return 0;
+}
+
+SYS_INIT(pinmux_stm32_init, PRE_KERNEL_1,
+	 CONFIG_PINMUX_STM32_DEVICE_INITIALIZATION_PRIORITY);

boards/arm/stm32f072_eval/stm32f072_eval.dts

@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2017 BayLibre, SAS
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/dts-v1/;
+#include <st/stm32f072.dtsi>
+
+/ {
+	model = "STMicroelectronics STM32F072-EVAL board";
+	compatible = "st,stm32f072-eval", "st,stm32f072";
+
+	chosen {
+		zephyr,console = &usart2;
+		zephyr,sram = &sram0;
+		zephyr,flash = &flash0;
+	};
+};
+
+&usart2 {
+	current-speed = <115200>;
+	pinctrl-0 = <&usart2_pins_d>;
+	pinctrl-names = "default";
+	status = "ok";
+};

boards/arm/stm32f072_eval/stm32f072_eval.yaml

@@ -0,0 +1,12 @@
+identifier: stm32f072_eval
+name: STM32F072-EVAL
+type: mcu
+arch: arm
+toolchain:
+  - zephyr
+  - gccarmemb
+ram: 16
+flash: 128
+testing:
+  ignore_tags:
+    - net

boards/arm/stm32f072_eval/stm32f072_eval_defconfig

@@ -0,0 +1,39 @@
+# Zephyr Kernel Configuration
+CONFIG_ARM=y
+CONFIG_SOC_SERIES_STM32F0X=y
+
+# Platform Configuration
+CONFIG_SOC_FAMILY_STM32=y
+CONFIG_SOC_STM32F072XB=y
+CONFIG_BOARD_STM32F072_EVAL=y
+
+# General Kernel Options
+CONFIG_CORTEX_M_SYSTICK=y
+CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=48000000
+
+# Serial Drivers
+CONFIG_SERIAL=y
+CONFIG_UART_INTERRUPT_DRIVEN=y
+# enable console
+CONFIG_CONSOLE=y
+CONFIG_UART_CONSOLE=y
+
+# Pinmux Driver
+CONFIG_PINMUX=y
+
+# GPIO Controller
+CONFIG_GPIO=y
+
+# Clock configuration
+CONFIG_CLOCK_CONTROL=y
+# SYSCLK selection
+CONFIG_CLOCK_STM32_SYSCLK_SRC_PLL=y
+# HSE configuration
+CONFIG_CLOCK_STM32_HSE_CLOCK=8000000
+# PLL configuration
+CONFIG_CLOCK_STM32_PLL_SRC_HSE=y
+# produce 48MHz clock at PLL output
+CONFIG_CLOCK_STM32_PLL_PREDIV1=1
+CONFIG_CLOCK_STM32_PLL_MULTIPLIER=6
+CONFIG_CLOCK_STM32_AHB_PRESCALER=1
+CONFIG_CLOCK_STM32_APB1_PRESCALER=1

boards/arm/stm32f072_eval/support/openocd.cfg

@@ -0,0 +1,12 @@
+source [find board/stm32f0discovery.cfg]
+
+$_TARGETNAME configure -event gdb-attach {
+	echo "Debugger attaching: halting execution"
+	reset halt
+	gdb_breakpoint_override hard
+}
+
+$_TARGETNAME configure -event gdb-detach {
+	echo "Debugger detaching: resuming execution"
+	resume
+}

drivers/pinmux/stm32/pinmux_stm32f0.h

@@ -31,6 +31,11 @@
 #define STM32F0_PINMUX_FUNC_PA15_USART2_RX \
 	(STM32_PINMUX_ALT_FUNC_1 | STM32_PUPDR_NO_PULL)
 
+#define STM32F0_PINMUX_FUNC_PD5_USART2_TX \
+	(STM32_PINMUX_ALT_FUNC_0 | STM32_PUSHPULL_NOPULL)
+#define STM32F0_PINMUX_FUNC_PD6_USART2_RX \
+	(STM32_PINMUX_ALT_FUNC_0 | STM32_PUPDR_NO_PULL)
+
 #define STM32F0_PINMUX_FUNC_PB8_I2C1_SCL \
 	(STM32_PINMUX_ALT_FUNC_1 | STM32_OPENDRAIN_PULLUP)
 #define STM32F0_PINMUX_FUNC_PB9_I2C1_SDA \

dts/arm/st/stm32f0-pinctrl.dtsi

@@ -33,6 +33,12 @@
 					tx = <STM32_PIN_PA14 (STM32_PINMUX_ALT_FUNC_1 | STM32_PUSHPULL_NOPULL)>;
 				};
 			};
+			usart2_pins_d: usart2@2 {
+				rx_tx {
+					rx = <STM32_PIN_PD6 (STM32_PINMUX_ALT_FUNC_0 | STM32_PUPDR_NO_PULL)>;
+					tx = <STM32_PIN_PD5 (STM32_PINMUX_ALT_FUNC_0 | STM32_PUSHPULL_NOPULL)>;
+				};
+			};
 		};
 	};
 };