aboutsummaryrefslogtreecommitdiff
path: root/examples
diff options
context:
space:
mode:
authorPiotr Esden-Tempski2012-03-11 23:55:24 -0700
committerPiotr Esden-Tempski2012-03-11 23:55:24 -0700
commitb41987dc7ad99f56d05c694cfd2f69f1e63c3649 (patch)
tree3ce05cccfd39ce26af94828a6d139a0b92646e00 /examples
parent22706613d900d8cc309834c1f2fa8b345b8b4494 (diff)
Added blocking usart printf for lisa/m 2.0
Diffstat (limited to 'examples')
-rw-r--r--examples/stm32/f1/lisa-m-2/usart_printf/Makefile25
-rw-r--r--examples/stm32/f1/lisa-m-2/usart_printf/usart_printf.c106
2 files changed, 131 insertions, 0 deletions
diff --git a/examples/stm32/f1/lisa-m-2/usart_printf/Makefile b/examples/stm32/f1/lisa-m-2/usart_printf/Makefile
new file mode 100644
index 0000000..80ac033
--- /dev/null
+++ b/examples/stm32/f1/lisa-m-2/usart_printf/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_printf
+
+LDSCRIPT = ../lisa-m.ld
+
+include ../../Makefile.include
+
diff --git a/examples/stm32/f1/lisa-m-2/usart_printf/usart_printf.c b/examples/stm32/f1/lisa-m-2/usart_printf/usart_printf.c
new file mode 100644
index 0000000..a66bcbc
--- /dev/null
+++ b/examples/stm32/f1/lisa-m-2/usart_printf/usart_printf.c
@@ -0,0 +1,106 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>,
+ * Copyright (C) 2011-2012 Piotr Esden-Tempski <piotr@esden.net>
+ *
+ * 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/f1/rcc.h>
+#include <libopencm3/stm32/f1/gpio.h>
+#include <libopencm3/stm32/usart.h>
+#include <libopencm3/stm32/nvic.h>
+#include <stdio.h>
+#include <errno.h>
+
+void clock_setup(void)
+{
+ rcc_clock_setup_in_hse_12mhz_out_72mhz();
+
+ /* Enable GPIOA clock (for LED GPIOs). */
+ rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPCEN);
+
+ /* Enable clocks for GPIO port A (for GPIO_USART2_TX) and USART2. */
+ rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN |
+ RCC_APB2ENR_AFIOEN);
+ rcc_peripheral_enable_clock(&RCC_APB1ENR, RCC_APB1ENR_USART2EN);
+}
+
+void usart_setup(void)
+{
+ /* Setup GPIO pin GPIO_USART2_RE_TX on GPIO port B for transmit. */
+ gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_50_MHZ,
+ GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, GPIO_USART2_TX);
+
+ /* Setup UART parameters. */
+ usart_set_baudrate(USART2, 230400);
+ usart_set_databits(USART2, 8);
+ usart_set_stopbits(USART2, USART_STOPBITS_1);
+ usart_set_parity(USART2, USART_PARITY_NONE);
+ usart_set_flow_control(USART2, USART_FLOWCONTROL_NONE);
+ usart_set_mode(USART2, USART_MODE_TX);
+
+ /* Finally enable the USART. */
+ usart_enable(USART2);
+}
+
+void gpio_setup(void)
+{
+ gpio_set(GPIOA, GPIO8);
+
+ /* Setup GPIO8 (in GPIO port A) for LED use. */
+ gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_50_MHZ,
+ GPIO_CNF_OUTPUT_PUSHPULL, GPIO8);
+}
+
+int _write(int file, char *ptr, int len)
+{
+ int i;
+
+ if (file == 1) {
+ for (i = 0; i < len; i++)
+ usart_send_blocking(USART2, ptr[i]);
+ return i;
+ }
+
+ errno = EIO;
+ return -1;
+}
+
+int main(void)
+{
+ int counter = 0;
+ float fcounter = 0.0;
+ double dcounter = 0.0;
+
+ clock_setup();
+ gpio_setup();
+ usart_setup();
+
+ /*
+ * Write Hello World, an integer, float and double all over
+ * again while incrementing the numbers.
+ */
+ while (1) {
+ gpio_toggle(GPIOA, GPIO8);
+ printf("Hello World! %i %f %f\r\n", counter, fcounter,
+ dcounter);
+ counter++;
+ fcounter += 0.01;
+ dcounter += 0.01;
+ }
+
+ return 0;
+}