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authorStephen Caudle2011-10-31 00:16:37 -0400
committerStephen Caudle2011-10-31 00:16:37 -0400
commit580d25a84baaa160b0afdc096e9aa1e8ca1c2d2b (patch)
treed3df10cb7a99745eafabe15a0ec286dc9923b4e8 /examples/stm32/f1/obldc/usart_irq
parent68d2e0d1e3c587e18eef6a6ef9c40b3549b2f9e7 (diff)
Move STM32 example projects in family specific folders
Diffstat (limited to 'examples/stm32/f1/obldc/usart_irq')
-rw-r--r--examples/stm32/f1/obldc/usart_irq/Makefile25
-rw-r--r--examples/stm32/f1/obldc/usart_irq/usart_irq.c120
-rw-r--r--examples/stm32/f1/obldc/usart_irq/usart_irq.ld31
3 files changed, 176 insertions, 0 deletions
diff --git a/examples/stm32/f1/obldc/usart_irq/Makefile b/examples/stm32/f1/obldc/usart_irq/Makefile
new file mode 100644
index 0000000..2ab46a0
--- /dev/null
+++ b/examples/stm32/f1/obldc/usart_irq/Makefile
@@ -0,0 +1,25 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## This program is free software: you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## This program 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 General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program. If not, see <http://www.gnu.org/licenses/>.
+##
+
+BINARY = usart_irq
+
+OOCD_BOARD = open-bldc
+
+include ../../Makefile.include
+
diff --git a/examples/stm32/f1/obldc/usart_irq/usart_irq.c b/examples/stm32/f1/obldc/usart_irq/usart_irq.c
new file mode 100644
index 0000000..20ff0a1
--- /dev/null
+++ b/examples/stm32/f1/obldc/usart_irq/usart_irq.c
@@ -0,0 +1,120 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libopencm3/stm32/f1/rcc.h>
+#include <libopencm3/stm32/f1/gpio.h>
+#include <libopencm3/stm32/usart.h>
+#include <libopencm3/stm32/nvic.h>
+
+void clock_setup(void)
+{
+ rcc_clock_setup_in_hse_8mhz_out_72mhz();
+
+ /* Enable GPIOA clock (for LED GPIOs). */
+ rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN);
+
+ /* Enable clocks for GPIO port B (for GPIO_USART1_TX) and USART1. */
+ rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPBEN);
+ rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_AFIOEN);
+ rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_USART1EN);
+}
+
+void usart_setup(void)
+{
+ /* Enable the USART1 interrupt. */
+ nvic_enable_irq(NVIC_USART1_IRQ);
+
+ /* enable USART1 pin software remapping */
+ AFIO_MAPR |= AFIO_MAPR_USART1_REMAP;
+
+ /* Setup GPIO pin GPIO_USART1_RE_TX on GPIO port B for transmit. */
+ gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_50_MHZ,
+ GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, GPIO_USART1_RE_TX);
+
+ /* Setup GPIO pin GPIO_USART1_RE_RX on GPIO port B for receive. */
+ gpio_set_mode(GPIOB, GPIO_MODE_INPUT,
+ GPIO_CNF_INPUT_FLOAT, GPIO_USART1_RE_RX);
+
+ /* Setup UART parameters. */
+ usart_set_baudrate(USART1, 230400, rcc_ppre2_frequency);
+ usart_set_databits(USART1, 8);
+ usart_set_stopbits(USART1, USART_STOPBITS_1);
+ usart_set_parity(USART1, USART_PARITY_NONE);
+ usart_set_flow_control(USART1, USART_FLOWCONTROL_NONE);
+ usart_set_mode(USART1, USART_MODE_TX_RX);
+
+ /* Enable USART1 Receive interrupt. */
+ USART_CR1(USART1) |= USART_CR1_RXNEIE;
+
+ /* Finally enable the USART. */
+ usart_enable(USART1);
+}
+
+void gpio_setup(void)
+{
+ gpio_set(GPIOA, GPIO6 | GPIO7);
+
+ /* Setup GPIO6 and 7 (in GPIO port A) for led use. */
+ gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_50_MHZ,
+ GPIO_CNF_OUTPUT_PUSHPULL, GPIO6 | GPIO7);
+}
+
+void usart1_isr(void)
+{
+ static u8 data = 'A';
+
+ /* Check if we were called because of RXNE. */
+ if (((USART_CR1(USART1) & USART_CR1_RXNEIE) != 0) &&
+ ((USART_SR(USART1) & USART_SR_RXNE) != 0)) {
+ /* Indicate that we got data. */
+ gpio_toggle(GPIOA, GPIO6);
+
+ /* Retrieve the data from the peripheral. */
+ data = usart_recv(USART1);
+
+ /* Enable transmit interrupt so it sends back the data. */
+ USART_CR1(USART1) |= USART_CR1_TXEIE;
+ }
+
+ /* Check if we were called because of TXE. */
+ if (((USART_CR1(USART1) & USART_CR1_TXEIE) != 0) &&
+ ((USART_SR(USART1) & USART_SR_TXE) != 0)) {
+ /* Indicate that we are sending out data. */
+ gpio_toggle(GPIOA, GPIO7);
+
+ /* Put data into the transmit register. */
+ usart_send(USART1, data);
+
+ /* Disable the TXE interrupt as we don't need it anymore. */
+ USART_CR1(USART1) &= ~USART_CR1_TXEIE;
+ }
+}
+
+int main(void)
+{
+ clock_setup();
+ gpio_setup();
+ usart_setup();
+
+ /* Wait forever and do nothing. */
+ while (1)
+ __asm__("nop");
+
+ return 0;
+}
diff --git a/examples/stm32/f1/obldc/usart_irq/usart_irq.ld b/examples/stm32/f1/obldc/usart_irq/usart_irq.ld
new file mode 100644
index 0000000..edb52c5
--- /dev/null
+++ b/examples/stm32/f1/obldc/usart_irq/usart_irq.ld
@@ -0,0 +1,31 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Linker script for Open-BLDC (STM32F103CBT6, 128K flash, 20K RAM). */
+
+/* Define memory regions. */
+MEMORY
+{
+ rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K
+ ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
+}
+
+/* Include the common ld script. */
+INCLUDE libopencm3_stm32f1.ld
+