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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/other/rtc
parent68d2e0d1e3c587e18eef6a6ef9c40b3549b2f9e7 (diff)
Move STM32 example projects in family specific folders
Diffstat (limited to 'examples/stm32/f1/other/rtc')
-rw-r--r--examples/stm32/f1/other/rtc/Makefile23
-rw-r--r--examples/stm32/f1/other/rtc/README6
-rw-r--r--examples/stm32/f1/other/rtc/rtc.c116
-rw-r--r--examples/stm32/f1/other/rtc/rtc.ld31
4 files changed, 176 insertions, 0 deletions
diff --git a/examples/stm32/f1/other/rtc/Makefile b/examples/stm32/f1/other/rtc/Makefile
new file mode 100644
index 0000000..1efa7ac
--- /dev/null
+++ b/examples/stm32/f1/other/rtc/Makefile
@@ -0,0 +1,23 @@
+##
+## 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 = rtc
+
+include ../../Makefile.include
+
diff --git a/examples/stm32/f1/other/rtc/README b/examples/stm32/f1/other/rtc/README
new file mode 100644
index 0000000..f1e3975
--- /dev/null
+++ b/examples/stm32/f1/other/rtc/README
@@ -0,0 +1,6 @@
+------------------------------------------------------------------------------
+README
+------------------------------------------------------------------------------
+
+This is a small RTC example project.
+
diff --git a/examples/stm32/f1/other/rtc/rtc.c b/examples/stm32/f1/other/rtc/rtc.c
new file mode 100644
index 0000000..28ae24c
--- /dev/null
+++ b/examples/stm32/f1/other/rtc/rtc.c
@@ -0,0 +1,116 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2010 Lord James <lordjames@y7mail.com>
+ *
+ * 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/f1/rtc.h>
+#include <libopencm3/stm32/usart.h>
+#include <libopencm3/stm32/pwr.h>
+#include <libopencm3/stm32/nvic.h>
+
+void clock_setup(void)
+{
+ rcc_clock_setup_in_hse_8mhz_out_72mhz();
+
+ /* Enable GPIOC clock. */
+ rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPCEN);
+
+ /* Enable clocks for GPIO port A (for GPIO_USART1_TX) and USART1. */
+ rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN);
+ rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_USART1EN);
+}
+
+void usart_setup(void)
+{
+ /* Setup GPIO pin GPIO_USART1_TX/GPIO9 on GPIO port A for transmit. */
+ gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_50_MHZ,
+ GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, GPIO_USART1_TX);
+
+ /* Setup UART parameters. */
+ usart_set_baudrate(USART1, 38400, rcc_ppre2_frequency);
+ usart_set_databits(USART1, 8);
+ usart_set_stopbits(USART1, USART_STOPBITS_1);
+ usart_set_mode(USART1, USART_MODE_TX);
+ usart_set_parity(USART1, USART_PARITY_NONE);
+ usart_set_flow_control(USART1, USART_FLOWCONTROL_NONE);
+
+ /* Finally enable the USART. */
+ usart_enable(USART1);
+}
+
+void gpio_setup(void)
+{
+ /* Set GPIO12 (in GPIO port C) to 'output push-pull'. */
+ gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_2_MHZ,
+ GPIO_CNF_OUTPUT_PUSHPULL, GPIO12);
+}
+
+void nvic_setup(void)
+{
+ /* Without this the RTC interrupt routine will never be called. */
+ nvic_enable_irq(NVIC_RTC_IRQ);
+ nvic_set_priority(NVIC_RTC_IRQ, 1);
+}
+
+void rtc_isr(void)
+{
+ volatile u32 j = 0, c = 0;
+
+ /* The interrupt flag isn't cleared by hardware, we have to do it. */
+ rtc_clear_flag(RTC_SEC);
+
+ /* Visual output. */
+ gpio_toggle(GPIOC, GPIO12);
+
+ c = rtc_get_counter_val();
+
+ /* Display the current counter value in binary via USART1. */
+ for (j = 0; j < 32; j++) {
+ if ((c & (0x80000000 >> j)) != 0) {
+ usart_send(USART1, '1');
+ } else {
+ usart_send(USART1, '0');
+ }
+ }
+ usart_send(USART1, '\n');
+}
+
+int main(void)
+{
+ clock_setup();
+ gpio_setup();
+ usart_setup();
+
+ /*
+ * If the RTC is pre-configured just allow access, don't reconfigure.
+ * Otherwise enable it with the LSE as clock source and 0x7fff as
+ * prescale value.
+ */
+ rtc_auto_awake(LSE, 0x7fff);
+
+ /* Setup the RTC interrupt. */
+ nvic_setup();
+
+ /* Enable the RTC interrupt to occur off the SEC flag. */
+ rtc_interrupt_enable(RTC_SEC);
+
+ while(1);
+
+ return 0;
+}
diff --git a/examples/stm32/f1/other/rtc/rtc.ld b/examples/stm32/f1/other/rtc/rtc.ld
new file mode 100644
index 0000000..3409b98
--- /dev/null
+++ b/examples/stm32/f1/other/rtc/rtc.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 Olimex STM32-H103 (STM32F103RBT6, 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
+