Reorganize examples with STM32 and new frameworks

examples/stm32/stm32-cmsis-blink/platformio.ini

@@ -0,0 +1,24 @@
+#
+# Project Configuration File
+#
+# A detailed documentation with the EXAMPLES is located here:
+# http://docs.platformio.org/en/latest/projectconf.html
+#
+
+# A sign `#` at the beginning of the line indicates a comment
+# Comment lines are ignored.
+
+# Simple and base environment
+# [env:mybaseenv]
+# platform = %INSTALLED_PLATFORM_NAME_HERE%
+# framework =
+# board =
+#
+# Automatic targets - enable auto-uploading
+# targets = upload
+
+
+[env:stm32]
+platform = stm32
+framework = cmsis
+board = stm32ldiscovery

examples/stm32/stm32-cmsis-blink/src/main.c

@@ -0,0 +1,27 @@
+#include "stm32l1xx.h"
+
+void ms_delay(int ms)
+{
+   while (ms-- > 0) {
+      volatile int x=500;
+      while (x-- > 0)
+         __asm("nop");
+   }
+}
+
+
+//Alternates blue and green LEDs quickly
+int main(void)
+{
+    RCC->AHBENR |= RCC_AHBENR_GPIOBEN; 		 // enable the clock to GPIOB
+    GPIOB->MODER |= (1 << 12);             // set pin 6 to be general purpose output
+    GPIOB->MODER |= (1 << 14);             // set pin 7 to be general purpose output
+
+    GPIOB->ODR |= (1 << 7);           			// Set the pin 7 high
+
+    for (;;) {
+       ms_delay(100);
+       GPIOB->ODR ^= (1 << 6);           // Toggle the pin 
+       GPIOB->ODR ^= (1 << 7);           // Toggle the pin 
+    }
+}

examples/stm32/stm32-opencm3-blink/platformio.ini

@@ -0,0 +1,23 @@
+#
+# Project Configuration File
+#
+# A detailed documentation with the EXAMPLES is located here:
+# http://docs.platformio.org/en/latest/projectconf.html
+#
+
+# A sign `#` at the beginning of the line indicates a comment
+# Comment lines are ignored.
+
+# Simple and base environment
+# [env:mybaseenv]
+# platform = %INSTALLED_PLATFORM_NAME_HERE%
+# framework =
+# board =
+#
+# Automatic targets - enable auto-uploading
+# targets = upload
+
+[env:stm32]
+platform = stm32
+board = stm32ldiscovery
+framework = opencm3

examples/stm32/stm32-opencm3-blink/src/main.c

@@ -0,0 +1,70 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ * Copyright (C) 2011 Stephen Caudle <scaudle@doceme.com>
+ * Copyright (C) 2012 Karl Palsson <karlp@tweak.net.au>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
+
+static void gpio_setup(void)
+{
+	/* Enable GPIOB clock. */
+	/* Manually: */
+	//RCC_AHBENR |= RCC_AHBENR_GPIOBEN;
+	/* Using API functions: */
+	rcc_periph_clock_enable(RCC_GPIOB);
+
+	/* Set GPIO6 (in GPIO port B) to 'output push-pull'. */
+	/* Using API functions: */
+	gpio_mode_setup(GPIOB, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO6);
+}
+
+int main(void)
+{
+	int i;
+
+	gpio_setup();
+
+	/* Blink the LED (PB6) on the board. */
+	while (1) {
+		/* Manually: */
+		// GPIOB_BSRR = GPIO6;		/* LED off */
+		// for (i = 0; i < 1000000; i++)	/* Wait a bit. */
+		//	__asm__("nop");
+		// GPIOB_BRR = GPIO6;		/* LED on */
+		// for (i = 0; i < 1000000; i++)	/* Wait a bit. */
+		//	__asm__("nop");
+
+		/* Using API functions gpio_set()/gpio_clear(): */
+		// gpio_set(GPIOB, GPIO6);	/* LED off */
+		// for (i = 0; i < 1000000; i++)	/* Wait a bit. */
+		//	__asm__("nop");
+		// gpio_clear(GPIOB, GPIO6);	/* LED on */
+		// for (i = 0; i < 1000000; i++)	/* Wait a bit. */
+		//	__asm__("nop");
+
+		/* Using API function gpio_toggle(): */
+		gpio_toggle(GPIOB, GPIO6);	/* LED on/off */
+		for (i = 0; i < 1000000; i++) {	/* Wait a bit. */
+			__asm__("nop");
+		}
+	}
+
+	return 0;
+}

examples/stm32/stm32-spl-blink/platformio.ini

@@ -0,0 +1,24 @@
+#
+# Project Configuration File
+#
+# A detailed documentation with the EXAMPLES is located here:
+# http://docs.platformio.org/en/latest/projectconf.html
+#
+
+# A sign `#` at the beginning of the line indicates a comment
+# Comment lines are ignored.
+
+# Simple and base environment
+# [env:mybaseenv]
+# platform = %INSTALLED_PLATFORM_NAME_HERE%
+# framework =
+# board =
+#
+# Automatic targets - enable auto-uploading
+# targets = upload
+
+
+[env:stm32]
+platform = stm32
+framework = cmsis,spl
+board = stm32ldiscovery

examples/stm32/stm32-spl-blink/src/main.c

@@ -0,0 +1,49 @@
+#include <stm32l1xx_gpio.h>
+#include <stm32l1xx_rcc.h>
+#include <misc.h>
+
+/* timing is not guaranteed :) */
+void simple_delay(uint32_t us)
+{
+	/* simple delay loop */
+	while (us--) {
+		asm volatile ("nop");
+	}
+}
+
+/* system entry point */
+int main(void)
+{
+	/* gpio init struct */
+	GPIO_InitTypeDef gpio;
+
+	/* reset rcc */
+	RCC_DeInit();
+
+	/* enable clock to GPIOB */
+	RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);
+
+	/* use pin 7 */
+	gpio.GPIO_Pin = GPIO_Pin_7;
+	/* mode: output */
+	gpio.GPIO_Mode = GPIO_Mode_OUT;
+	/* output type: push-pull */
+	gpio.GPIO_OType = GPIO_OType_PP;
+	/* apply configuration */
+	GPIO_Init(GPIOB, &gpio);
+
+	/* main program loop */
+	for (;;) {
+		/* set led on */
+		GPIO_SetBits(GPIOB, GPIO_Pin_7);
+		/* delay */
+		simple_delay(100000);
+		/* clear led */
+		GPIO_ResetBits(GPIOB, GPIO_Pin_7);
+		/* delay */
+		simple_delay(100000);
+	}
+
+	/* never reached */
+	return 0;
+}

examples/titiva/titiva-energia-blink/platformio.ini

@@ -0,0 +1,23 @@
+#
+# Project Configuration File
+#
+# A detailed documentation with the EXAMPLES is located here:
+# http://docs.platformio.org/en/latest/projectconf.html
+#
+
+# A sign `#` at the beginning of the line indicates a comment
+# Comment lines are ignored.
+
+# Simple and base environment
+# [env:mybaseenv]
+# platform = %INSTALLED_PLATFORM_NAME_HERE%
+# framework =
+# board =
+#
+# Automatic targets - enable auto-uploading
+# targets = upload
+
+[env:launchpad_tm4c1230c3pm]
+platform = titiva
+framework = energia
+board = lptm4c1230c3pm

examples/titiva/titiva-energia-blink/src/main.cpp

@@ -0,0 +1,19 @@
+/**
+ * Copyright (C) Ivan Kravets <me@ikravets.com>
+ * See LICENSE for details.
+ */
+
+#include "Energia.h"
+
+void setup()
+{
+  pinMode(GREEN_LED, OUTPUT);     // set pin as output
+}
+
+void loop()
+{
+  digitalWrite(GREEN_LED, HIGH);  // set the LED on
+  delay(1000);                  // wait for a second
+  digitalWrite(GREEN_LED, LOW);   // set the LED off
+  delay(1000);                  // wait for a second
+}

examples/titiva/titiva-native-blink/platformio.ini

@@ -21,4 +21,3 @@
 platform = titiva
 framework = energia
 board = lplm4f120h5qr
-targets = upload

examples/titiva/titiva-opencm3-blink/platformio.ini

@@ -0,0 +1,23 @@
+#
+# Project Configuration File
+#
+# A detailed documentation with the EXAMPLES is located here:
+# http://docs.platformio.org/en/latest/projectconf.html
+#
+
+# A sign `#` at the beginning of the line indicates a comment
+# Comment lines are ignored.
+
+# Simple and base environment
+# [env:mybaseenv]
+# platform = %INSTALLED_PLATFORM_NAME_HERE%
+# framework =
+# board =
+#
+# Automatic targets - enable auto-uploading
+# targets = upload
+
+[env:launchpad_lm4f120]
+platform = titiva
+framework = opencm3
+board = lplm4f120h5qr

examples/titiva/titiva-opencm3-blink/src/main.c

@@ -0,0 +1,206 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2011 Gareth McMullin <gareth@blacksphere.co.nz>
+ * Copyright (C) 2012-2013 Alexandru Gagniuc <mr.nuke.me@gmail.com>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * \addtogroup Examples
+ *
+ * Flashes the Red, Green and Blue diodes on the board, in order.
+ *
+ * RED controlled by PF1
+ * Green controlled by PF3
+ * Blue controlled by PF2
+ */
+#include <libopencm3/cm3/nvic.h>
+#include <libopencm3/lm4f/systemcontrol.h>
+#include <libopencm3/lm4f/rcc.h>
+#include <libopencm3/lm4f/gpio.h>
+#include <libopencm3/lm4f/nvic.h>
+
+#include <stdbool.h>
+#include <stdio.h>
+
+/* This is how the RGB LED is connected on the stellaris launchpad */
+#define RGB_PORT	GPIOF
+enum {
+	LED_R	= GPIO1,
+	LED_G	= GPIO3,
+	LED_B	= GPIO2,
+};
+
+/* This is how the user switches are connected to GPIOF */
+enum {
+	USR_SW1	= GPIO4,
+	USR_SW2	= GPIO0,
+};
+
+/* The divisors we loop through when the user presses SW2 */
+enum {
+	PLL_DIV_80MHZ 	= 5,
+	PLL_DIV_57MHZ 	= 7,
+	PLL_DIV_40MHZ 	= 10,
+	PLL_DIV_20MHZ 	= 20,
+	PLL_DIV_16MHZ 	= 25,
+};
+
+static const uint8_t plldiv[] = {
+	PLL_DIV_80MHZ,
+	PLL_DIV_57MHZ,
+	PLL_DIV_40MHZ,
+	PLL_DIV_20MHZ,
+	PLL_DIV_16MHZ,
+	0
+};
+/* The PLL divisor we are currently on */
+static size_t ipll = 0;
+/* Are we bypassing the PLL, or not? */
+static bool bypass = false;
+
+/*
+ * Clock setup:
+ * Take the main crystal oscillator at 16MHz, run it through the PLL, and divide
+ * the 400MHz PLL clock to get a system clock of 80MHz.
+ */
+static void clock_setup(void)
+{
+	rcc_sysclk_config(OSCSRC_MOSC, XTAL_16M, PLL_DIV_80MHZ);
+}
+
+/*
+ * GPIO setup:
+ * Enable the pins driving the RGB LED as outputs.
+ */
+static void gpio_setup(void)
+{
+	/*
+	 * Configure GPIOF
+	 * This port is used to control the RGB LED
+	 */
+	periph_clock_enable(RCC_GPIOF);
+	const uint32_t outpins = (LED_R | LED_G | LED_B);
+
+	gpio_mode_setup(RGB_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, outpins);
+	gpio_set_output_config(RGB_PORT, GPIO_OTYPE_PP, GPIO_DRIVE_2MA, outpins);
+
+	/*
+	 * Now take care of our buttons
+	 */
+	const uint32_t btnpins = USR_SW1 | USR_SW2;
+
+	/*
+	 * PF0 is a locked by default. We need to unlock it before we can
+	 * re-purpose it as a GPIO pin.
+	 */
+	gpio_unlock_commit(GPIOF, USR_SW2);
+	/* Configure pins as inputs, with pull-up. */
+	gpio_mode_setup(GPIOF, GPIO_MODE_INPUT, GPIO_PUPD_PULLUP, btnpins);
+}
+
+/*
+ * IRQ setup:
+ * Trigger an interrupt whenever a button is depressed.
+ */
+static void irq_setup(void)
+{
+	const uint32_t btnpins = USR_SW1 | USR_SW2;
+	/* Trigger interrupt on rising-edge (when button is depressed) */
+	gpio_configure_trigger(GPIOF, GPIO_TRIG_EDGE_RISE, btnpins);
+	/* Finally, Enable interrupt */
+	gpio_enable_interrupts(GPIOF, btnpins);
+	/* Enable the interrupt in the NVIC as well */
+	nvic_enable_irq(NVIC_GPIOF_IRQ);
+}
+
+#define FLASH_DELAY 800000
+static void delay(void)
+{
+	int i;
+	for (i = 0; i < FLASH_DELAY; i++)       /* Wait a bit. */
+		__asm__("nop");
+}
+
+int main(void)
+{
+	gpio_enable_ahb_aperture();
+	clock_setup();
+	gpio_setup();
+	irq_setup();
+
+	/* Blink each color of the RGB LED in order. */
+	while (1) {
+		/*
+		 * Flash the Red diode
+		 */
+		gpio_set(RGB_PORT, LED_R);
+		delay(); /* Wait a bit. */
+		gpio_clear(RGB_PORT, LED_R);
+		delay(); /* Wait a bit. */
+
+		/*
+		 * Flash the Green diode
+		 */
+		gpio_set(RGB_PORT, LED_G);
+		delay(); /* Wait a bit. */
+		gpio_clear(RGB_PORT, LED_G);
+		delay(); /* Wait a bit. */
+
+		/*
+		 * Flash the Blue diode
+		 */
+		gpio_set(RGB_PORT, LED_B);
+		delay(); /* Wait a bit. */
+		gpio_clear(RGB_PORT, LED_B);
+		delay(); /* Wait a bit. */
+	}
+
+	return 0;
+}
+
+void gpiof_isr(void)
+{
+	if (gpio_is_interrupt_source(GPIOF, USR_SW1)) {
+		/* SW1 was just depressed */
+		bypass = !bypass;
+		if (bypass) {
+			rcc_pll_bypass_enable();
+			/*
+			 * The divisor is still applied to the raw clock.
+			 * Disable the divisor, or we'll divide the raw clock.
+			 */
+			SYSCTL_RCC &= ~SYSCTL_RCC_USESYSDIV;
+		}
+		else
+		{
+			rcc_change_pll_divisor(plldiv[ipll]);
+		}
+		/* Clear interrupt source */
+		gpio_clear_interrupt_flag(GPIOF, USR_SW1);
+	}
+
+	if (gpio_is_interrupt_source(GPIOF, USR_SW2)) {
+		/* SW2 was just depressed */
+		if (!bypass) {
+			if (plldiv[++ipll] == 0)
+				ipll = 0;
+			rcc_change_pll_divisor(plldiv[ipll]);
+		}
+		/* Clear interrupt source */
+		gpio_clear_interrupt_flag(GPIOF, USR_SW2);
+	}
+}