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-rw-r--r--examples/stm32/l1/stm32l-discovery/button-irq-printf/Makefile24
-rw-r--r--examples/stm32/l1/stm32l-discovery/button-irq-printf/README3
-rw-r--r--examples/stm32/l1/stm32l-discovery/button-irq-printf/main.c117
-rw-r--r--examples/stm32/l1/stm32l-discovery/button-irq-printf/syscfg.h45
-rw-r--r--examples/stm32/l1/stm32l-discovery/miniblink/Makefile25
-rw-r--r--examples/stm32/l1/stm32l-discovery/miniblink/README9
-rw-r--r--examples/stm32/l1/stm32l-discovery/miniblink/miniblink.c72
-rw-r--r--examples/stm32/l1/stm32l-discovery/usart/Makefile25
-rw-r--r--examples/stm32/l1/stm32l-discovery/usart/README12
-rw-r--r--examples/stm32/l1/stm32l-discovery/usart/usart.c80
10 files changed, 412 insertions, 0 deletions
diff --git a/examples/stm32/l1/stm32l-discovery/button-irq-printf/Makefile b/examples/stm32/l1/stm32l-discovery/button-irq-printf/Makefile
new file mode 100644
index 0000000..d57ea7a
--- /dev/null
+++ b/examples/stm32/l1/stm32l-discovery/button-irq-printf/Makefile
@@ -0,0 +1,24 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## 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/>.
+##
+
+BINARY = main
+LDSCRIPT = ../../../../../lib/stm32/l1/stm32l15xxb.ld
+
+include ../../Makefile.include
+
diff --git a/examples/stm32/l1/stm32l-discovery/button-irq-printf/README b/examples/stm32/l1/stm32l-discovery/button-irq-printf/README
new file mode 100644
index 0000000..63232ef
--- /dev/null
+++ b/examples/stm32/l1/stm32l-discovery/button-irq-printf/README
@@ -0,0 +1,3 @@
+* Prints to the screen when the button is pushed/released (irq driven)
+ 115200@8n1 console on PA2 (tx only)
+
diff --git a/examples/stm32/l1/stm32l-discovery/button-irq-printf/main.c b/examples/stm32/l1/stm32l-discovery/button-irq-printf/main.c
new file mode 100644
index 0000000..1830c4d
--- /dev/null
+++ b/examples/stm32/l1/stm32l-discovery/button-irq-printf/main.c
@@ -0,0 +1,117 @@
+/*
+ * Karl Palsson, 2012 <karlp@tweak.net.au
+ */
+
+#include <errno.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <libopencm3/cm3/nvic.h>
+#include <libopencm3/stm32/l1/rcc.h>
+#include <libopencm3/stm32/l1/gpio.h>
+#include <libopencm3/stm32/exti.h>
+#include <libopencm3/stm32/usart.h>
+
+#include "syscfg.h"
+
+static struct state_t state;
+
+void clock_setup(void) {
+ /* Lots of things on all ports... */
+ rcc_peripheral_enable_clock(&RCC_AHBENR, RCC_AHBENR_GPIOAEN);
+ rcc_peripheral_enable_clock(&RCC_AHBENR, RCC_AHBENR_GPIOBEN);
+
+ /* Enable clocks for USART2. */
+ rcc_peripheral_enable_clock(&RCC_APB1ENR, RCC_APB1ENR_USART2EN);
+}
+
+void gpio_setup(void) {
+ gpio_mode_setup(LED_DISCO_GREEN_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, LED_DISCO_GREEN_PIN);
+
+ /* Setup GPIO pins for USART2 transmit. */
+ gpio_mode_setup(GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO2);
+
+ /* Setup USART2 TX pin as alternate function. */
+ gpio_set_af(GPIOA, GPIO_AF7, GPIO2);
+}
+
+void usart_setup(void) {
+ usart_set_baudrate(USART_CONSOLE, 115200);
+ usart_set_databits(USART_CONSOLE, 8);
+ usart_set_stopbits(USART_CONSOLE, USART_STOPBITS_1);
+ usart_set_mode(USART_CONSOLE, USART_MODE_TX);
+ usart_set_parity(USART_CONSOLE, USART_PARITY_NONE);
+ usart_set_flow_control(USART_CONSOLE, USART_FLOWCONTROL_NONE);
+
+ /* Finally enable the USART. */
+ usart_enable(USART_CONSOLE);
+}
+
+/**
+ * Use USART_CONSOLE as a console.
+ * @param file
+ * @param ptr
+ * @param len
+ * @return
+ */
+int _write(int file, char *ptr, int len) {
+ int i;
+
+ if (file == STDOUT_FILENO || file == STDERR_FILENO) {
+ for (i = 0; i < len; i++) {
+ if (ptr[i] == '\n') {
+ usart_send_blocking(USART_CONSOLE, '\r');
+ }
+ usart_send_blocking(USART_CONSOLE, ptr[i]);
+ }
+ return i;
+ }
+ errno = EIO;
+ return -1;
+}
+
+void BUTTON_DISCO_USER_isr(void) {
+ exti_reset_request(BUTTON_DISCO_USER_EXTI);
+ if (state.falling) {
+ state.falling = false;
+ exti_set_trigger(BUTTON_DISCO_USER_EXTI, EXTI_TRIGGER_RISING);
+ // ILOG("fell: %d\n", TIM_CNT(TIM7));
+ puts("fell!\n");
+ } else {
+ puts("Rose!\n");
+ // TIM_CNT(TIM7) = 0;
+ state.falling = true;
+ exti_set_trigger(BUTTON_DISCO_USER_EXTI, EXTI_TRIGGER_FALLING);
+ }
+}
+
+void setup_buttons(void) {
+ /* Enable EXTI0 interrupt. */
+ nvic_enable_irq(BUTTON_DISCO_USER_NVIC);
+
+ gpio_mode_setup(BUTTON_DISCO_USER_PORT, GPIO_MODE_INPUT, GPIO_PUPD_NONE, BUTTON_DISCO_USER_PIN);
+
+ /* Configure the EXTI subsystem. */
+ exti_select_source(BUTTON_DISCO_USER_EXTI, BUTTON_DISCO_USER_PORT);
+ state.falling = false;
+ exti_set_trigger(BUTTON_DISCO_USER_EXTI, EXTI_TRIGGER_RISING);
+ exti_enable_request(BUTTON_DISCO_USER_EXTI);
+}
+
+int main(void) {
+ int i;
+ int j = 0;
+ clock_setup();
+ gpio_setup();
+ usart_setup();
+ puts("hi guys!\n");
+ setup_buttons();
+ while (1) {
+ puts("tick:");
+ putchar('a' + (j++ % 26));
+ gpio_toggle(GPIOB, GPIO7); /* LED on/off */
+ for (i = 0; i < 100000; i++) /* Wait a bit. */
+ __asm__("NOP");
+ }
+
+ return 0;
+}
diff --git a/examples/stm32/l1/stm32l-discovery/button-irq-printf/syscfg.h b/examples/stm32/l1/stm32l-discovery/button-irq-printf/syscfg.h
new file mode 100644
index 0000000..32cf465
--- /dev/null
+++ b/examples/stm32/l1/stm32l-discovery/button-irq-printf/syscfg.h
@@ -0,0 +1,45 @@
+/*
+ * General configuration of the device
+ *
+ * Karl Palsson <karlp@tweak.net.au> 2012
+ */
+
+#ifndef SYSCFG_H
+#define SYSCFG_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <libopencm3/stm32/l1/gpio.h>
+#include <libopencm3/stm32/l1/nvic.h>
+#include <libopencm3/stm32/exti.h>
+#include <libopencm3/stm32/usart.h>
+
+
+#define USART_CONSOLE USART2
+#define USE_NASTYLOG 1
+
+#define LED_DISCO_GREEN_PORT GPIOB
+#define LED_DISCO_GREEN_PIN GPIO7
+#define LED_DISCO_BLUE_PORT GPIOB
+#define LED_DISCO_BLUE_PIN GPIO6
+
+#define BUTTON_DISCO_USER_PORT GPIOA
+#define BUTTON_DISCO_USER_PIN GPIO0
+#define BUTTON_DISCO_USER_EXTI EXTI0
+#define BUTTON_DISCO_USER_isr exti0_isr
+#define BUTTON_DISCO_USER_NVIC NVIC_EXTI0_IRQ
+
+
+ struct state_t {
+ bool falling;
+ };
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* SYSCFG_H */
+
diff --git a/examples/stm32/l1/stm32l-discovery/miniblink/Makefile b/examples/stm32/l1/stm32l-discovery/miniblink/Makefile
new file mode 100644
index 0000000..b0586e5
--- /dev/null
+++ b/examples/stm32/l1/stm32l-discovery/miniblink/Makefile
@@ -0,0 +1,25 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## 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/>.
+##
+
+BINARY = miniblink
+
+LDSCRIPT = ../../../../../lib/stm32/l1/stm32l15xxb.ld
+
+include ../../Makefile.include
+
diff --git a/examples/stm32/l1/stm32l-discovery/miniblink/README b/examples/stm32/l1/stm32l-discovery/miniblink/README
new file mode 100644
index 0000000..8bdd314
--- /dev/null
+++ b/examples/stm32/l1/stm32l-discovery/miniblink/README
@@ -0,0 +1,9 @@
+------------------------------------------------------------------------------
+README
+------------------------------------------------------------------------------
+
+This is the smallest-possible example program using libopencm3.
+
+It's intended for the ST STM32L-DISCOVERY eval board. It should blink
+the blue LED on the board.
+
diff --git a/examples/stm32/l1/stm32l-discovery/miniblink/miniblink.c b/examples/stm32/l1/stm32l-discovery/miniblink/miniblink.c
new file mode 100644
index 0000000..2f5c70f
--- /dev/null
+++ b/examples/stm32/l1/stm32l-discovery/miniblink/miniblink.c
@@ -0,0 +1,72 @@
+/*
+ * 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/l1/rcc.h>
+#include <libopencm3/stm32/l1/gpio.h>
+
+#define PORT_LED GPIOB
+#define PIN_LED GPIO6
+
+void gpio_setup(void)
+{
+ /* Enable GPIOB clock. */
+ /* Manually: */
+ //RCC_AHBENR |= RCC_AHBENR_GPIOBEN;
+ /* Using API functions: */
+ rcc_peripheral_enable_clock(&RCC_AHBENR, RCC_AHBENR_GPIOBEN);
+
+ /* Set GPIO6 (in GPIO port B) to 'output push-pull'. */
+ /* Using API functions: */
+ gpio_mode_setup(PORT_LED, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, PIN_LED);
+}
+
+int main(void)
+{
+ int i;
+
+ gpio_setup();
+
+ /* Blink the LED (PC8) on the board. */
+ while (1) {
+ /* Manually: */
+ // GPIOD_BSRR = GPIO12; /* LED off */
+ // for (i = 0; i < 1000000; i++) /* Wait a bit. */
+ // __asm__("nop");
+ // GPIOD_BRR = GPIO12; /* LED on */
+ // for (i = 0; i < 1000000; i++) /* Wait a bit. */
+ // __asm__("nop");
+
+ /* Using API functions gpio_set()/gpio_clear(): */
+ // gpio_set(GPIOD, GPIO12); /* LED off */
+ // for (i = 0; i < 1000000; i++) /* Wait a bit. */
+ // __asm__("nop");
+ // gpio_clear(GPIOD, GPIO12); /* LED on */
+ // for (i = 0; i < 1000000; i++) /* Wait a bit. */
+ // __asm__("nop");
+
+ /* Using API function gpio_toggle(): */
+ gpio_toggle(PORT_LED, PIN_LED); /* LED on/off */
+ for (i = 0; i < 1000000; i++) /* Wait a bit. */
+ __asm__("nop");
+ }
+
+ return 0;
+}
diff --git a/examples/stm32/l1/stm32l-discovery/usart/Makefile b/examples/stm32/l1/stm32l-discovery/usart/Makefile
new file mode 100644
index 0000000..ac088fe
--- /dev/null
+++ b/examples/stm32/l1/stm32l-discovery/usart/Makefile
@@ -0,0 +1,25 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## 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/>.
+##
+
+BINARY = usart
+
+LDSCRIPT = ../../../../../lib/stm32/l1/stm32l15xxb.ld
+
+include ../../Makefile.include
+
diff --git a/examples/stm32/l1/stm32l-discovery/usart/README b/examples/stm32/l1/stm32l-discovery/usart/README
new file mode 100644
index 0000000..dcbc5d9
--- /dev/null
+++ b/examples/stm32/l1/stm32l-discovery/usart/README
@@ -0,0 +1,12 @@
+------------------------------------------------------------------------------
+README
+------------------------------------------------------------------------------
+
+This example program sends some characters on USART2 on the
+ST STM32L DISCOVERY eval board. (USART2 TX on PA2)
+
+The terminal settings for the receiving device/PC are 38400 8n1.
+
+The sending is done in a blocking way in the code, see the usart_irq example
+for a more elaborate USART example.
+
diff --git a/examples/stm32/l1/stm32l-discovery/usart/usart.c b/examples/stm32/l1/stm32l-discovery/usart/usart.c
new file mode 100644
index 0000000..3335ca8
--- /dev/null
+++ b/examples/stm32/l1/stm32l-discovery/usart/usart.c
@@ -0,0 +1,80 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ * 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/l1/rcc.h>
+#include <libopencm3/stm32/l1/gpio.h>
+#include <libopencm3/stm32/usart.h>
+
+void clock_setup(void) {
+ /* We are running on MSI after boot. */
+ /* Enable GPIOD clock for LED & USARTs. */
+ rcc_peripheral_enable_clock(&RCC_AHBENR, RCC_AHBENR_GPIOAEN);
+ rcc_peripheral_enable_clock(&RCC_AHBENR, RCC_AHBENR_GPIOBEN);
+
+ /* Enable clocks for USART2. */
+ rcc_peripheral_enable_clock(&RCC_APB1ENR, RCC_APB1ENR_USART2EN);
+}
+
+void usart_setup(void) {
+ /* Setup USART2 parameters. */
+ usart_set_baudrate(USART2, 38400);
+ usart_set_databits(USART2, 8);
+ usart_set_stopbits(USART2, USART_STOPBITS_1);
+ usart_set_mode(USART2, USART_MODE_TX);
+ usart_set_parity(USART2, USART_PARITY_NONE);
+ usart_set_flow_control(USART2, USART_FLOWCONTROL_NONE);
+
+ /* Finally enable the USART. */
+ usart_enable(USART2);
+}
+
+void gpio_setup(void) {
+ /* Setup GPIO pin GPIO7 on GPIO port B for Green LED. */
+ gpio_mode_setup(GPIOB, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO7);
+
+ /* Setup GPIO pins for USART2 transmit. */
+ gpio_mode_setup(GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO2);
+
+ /* Setup USART2 TX pin as alternate function. */
+ gpio_set_af(GPIOA, GPIO_AF7, GPIO2);
+}
+
+int main(void) {
+ int i, j = 0, c = 0;
+
+ clock_setup();
+ gpio_setup();
+ usart_setup();
+
+ /* Blink the LED (PD12) on the board with every transmitted byte. */
+ while (1) {
+ gpio_toggle(GPIOB, GPIO7); /* LED on/off */
+ usart_send_blocking(USART2, c + '0'); /* USART2: Send byte. */
+ c = (c == 9) ? 0 : c + 1; /* Increment c. */
+ if ((j++ % 80) == 0) { /* Newline after line full. */
+ usart_send_blocking(USART2, '\r');
+ usart_send_blocking(USART2, '\n');
+ }
+ for (i = 0; i < 100000; i++) /* Wait a bit. */
+ __asm__("NOP");
+ }
+
+ return 0;
+}