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authorUwe Hermann2010-05-10 00:40:42 +0200
committerUwe Hermann2010-05-10 00:40:42 +0200
commit93fe67908a80ca532c7d895028cc89842a1a05e4 (patch)
tree07d22900a028c976f151dc2c4cfe92174a4c0003 /examples
parent8195b1a718ba21e0582c12e914802ed88c3c0b8e (diff)
Add more RTC functions and an RTC example.
Thanks Lord James <lordjames@y7mail.com> for the patch!
Diffstat (limited to 'examples')
-rw-r--r--examples/other/Makefile10
-rw-r--r--examples/other/rtc/Makefile95
-rw-r--r--examples/other/rtc/README43
-rw-r--r--examples/other/rtc/rtc.c116
-rw-r--r--examples/other/rtc/rtc.ld31
5 files changed, 293 insertions, 2 deletions
diff --git a/examples/other/Makefile b/examples/other/Makefile
index da988ff..4eec8e5 100644
--- a/examples/other/Makefile
+++ b/examples/other/Makefile
@@ -24,7 +24,7 @@ Q := @
MAKEFLAGS += --no-print-directory
endif
-all: i2c_stts75_sensor adc_temperature_sensor dma_mem2mem timer_interrupt systick dogm128
+all: i2c_stts75_sensor adc_temperature_sensor dma_mem2mem timer_interrupt systick dogm128 rtc
i2c_stts75_sensor:
@printf " BUILD examples/other/i2c_stts75_sensor\n"
@@ -50,6 +50,10 @@ dogm128:
@printf " BUILD examples/other/dogm128\n"
$(Q)$(MAKE) -C dogm128
+rtc:
+ @printf " BUILD examples/other/rtc\n"
+ $(Q)$(MAKE) -C rtc
+
clean:
@printf " CLEAN examples/other/i2c_stts75_sensor\n"
$(Q)$(MAKE) -C i2c_stts75_sensor clean
@@ -63,6 +67,8 @@ clean:
$(Q)$(MAKE) -C systick clean
@printf " CLEAN examples/other/dogm128\n"
$(Q)$(MAKE) -C dogm128 clean
+ @printf " CLEAN examples/other/rtc\n"
+ $(Q)$(MAKE) -C rtc clean
-.PHONY: i2c_stts75_sensor adc_temperature_sensor dma_mem2mem timer_interrupt systick dogm128 clean
+.PHONY: i2c_stts75_sensor adc_temperature_sensor dma_mem2mem timer_interrupt systick dogm128 rtc clean
diff --git a/examples/other/rtc/Makefile b/examples/other/rtc/Makefile
new file mode 100644
index 0000000..3270192
--- /dev/null
+++ b/examples/other/rtc/Makefile
@@ -0,0 +1,95 @@
+##
+## This file is part of the libopenstm32 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
+
+# PREFIX ?= arm-none-eabi
+PREFIX ?= arm-elf
+CC = $(PREFIX)-gcc
+LD = $(PREFIX)-ld
+OBJCOPY = $(PREFIX)-objcopy
+OBJDUMP = $(PREFIX)-objdump
+# Uncomment this line if you want to use the installed (not local) library.
+# TOOLCHAIN_DIR = `dirname \`which $(CC)\``/../$(PREFIX)
+TOOLCHAIN_DIR = ../../..
+CFLAGS = -O0 -g -Wall -Wextra -I$(TOOLCHAIN_DIR)/include -fno-common \
+ -mcpu=cortex-m3 -mthumb
+LDSCRIPT = $(BINARY).ld
+LDFLAGS = -L$(TOOLCHAIN_DIR)/lib -T$(LDSCRIPT) -nostartfiles
+OBJS = $(BINARY).o
+
+OPENOCD_BASE = /usr
+OPENOCD = $(OPENOCD_BASE)/bin/openocd
+OPENOCD_SCRIPTS = $(OPENOCD_BASE)/share/openocd/scripts
+OPENOCD_FLASHER = $(OPENOCD_SCRIPTS)/interface/parport.cfg
+OPENOCD_BOARD = $(OPENOCD_SCRIPTS)/board/olimex_stm32_h103.cfg
+
+# Be silent per default, but 'make V=1' will show all compiler calls.
+ifneq ($(V),1)
+Q := @
+NULL := 2>/dev/null
+endif
+
+all: images
+
+images: $(BINARY)
+ @printf " OBJCOPY $(BINARY).bin\n"
+ $(Q)$(OBJCOPY) -Obinary $(BINARY) $(BINARY).bin
+ @printf " OBJCOPY $(BINARY).hex\n"
+ $(Q)$(OBJCOPY) -Oihex $(BINARY) $(BINARY).hex
+ @printf " OBJCOPY $(BINARY).srec\n"
+ $(Q)$(OBJCOPY) -Osrec $(BINARY) $(BINARY).srec
+ @printf " OBJDUMP $(BINARY).list\n"
+ $(Q)$(OBJDUMP) -S $(BINARY) > $(BINARY).list
+
+$(BINARY): $(OBJS) $(LDSCRIPT)
+ @printf " LD $(subst $(shell pwd)/,,$(@))\n"
+ $(Q)$(LD) $(LDFLAGS) -o $(BINARY) $(OBJS) -lopenstm32
+
+%.o: %.c Makefile
+ @printf " CC $(subst $(shell pwd)/,,$(@))\n"
+ $(Q)$(CC) $(CFLAGS) -o $@ -c $<
+
+clean:
+ @printf " CLEAN $(subst $(shell pwd)/,,$(OBJS))\n"
+ $(Q)rm -f *.o
+ @printf " CLEAN $(BINARY)\n"
+ $(Q)rm -f $(BINARY)
+ @printf " CLEAN $(BINARY).bin\n"
+ $(Q)rm -f $(BINARY).bin
+ @printf " CLEAN $(BINARY).hex\n"
+ $(Q)rm -f $(BINARY).hex
+ @printf " CLEAN $(BINARY).srec\n"
+ $(Q)rm -f $(BINARY).srec
+ @printf " CLEAN $(BINARY).list\n"
+ $(Q)rm -f $(BINARY).list
+
+flash: images
+ @printf " FLASH $(BINARY).bin\n"
+ @# IMPORTANT: Don't use "resume", only "reset" will work correctly!
+ $(Q)$(OPENOCD) -s $(OPENOCD_SCRIPTS) \
+ -f $(OPENOCD_FLASHER) \
+ -f $(OPENOCD_BOARD) \
+ -c "init" -c "reset halt" \
+ -c "flash write_image erase $(BINARY).hex" \
+ -c "reset" \
+ -c "shutdown" $(NULL)
+
+.PHONY: images clean
+
diff --git a/examples/other/rtc/README b/examples/other/rtc/README
new file mode 100644
index 0000000..cc162bf
--- /dev/null
+++ b/examples/other/rtc/README
@@ -0,0 +1,43 @@
+------------------------------------------------------------------------------
+README
+------------------------------------------------------------------------------
+
+This is a small RTC example project.
+
+
+Building
+--------
+
+ $ make
+
+Running 'make' on the top-level libopenstm32 directory will automatically
+also build this example. Or you can build the library "manually" and
+then run 'make' in this directory.
+
+You may want to override the toolchain (e.g., arm-elf or arm-none-eabi):
+
+ $ PREFIX=arm-none-eabi make
+
+For a more verbose build you can use
+
+ $ make V=1
+
+
+Flashing
+--------
+
+You can flash the generated code using OpenOCD:
+
+ $ make flash
+
+Or you can do the same manually via:
+
+ $ openocd -f interface/jtagkey-tiny.cfg -f board/olimex_stm32_h103.cfg
+ $ telnet localhost 4444
+ > reset halt
+ > flash write_image erase rtc.hex
+ > reset
+
+Replace the "jtagkey-tiny.cfg" with whatever JTAG device you are using, and/or
+replace "olimex_stm32_h103.cfg" with your respective board config file.
+
diff --git a/examples/other/rtc/rtc.c b/examples/other/rtc/rtc.c
new file mode 100644
index 0000000..cf40072
--- /dev/null
+++ b/examples/other/rtc/rtc.c
@@ -0,0 +1,116 @@
+/*
+ * This file is part of the libopenstm32 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 <libopenstm32/rcc.h>
+#include <libopenstm32/gpio.h>
+#include <libopenstm32/usart.h>
+#include <libopenstm32/rtc.h>
+#include <libopenstm32/pwr.h>
+#include <libopenstm32/nvic.h>
+
+void clock_setup(void)
+{
+ rcc_clock_setup_in_hse_8mhz_out_72mhz();
+
+ /* Enable GPIOC clock. */
+ rcc_peripheral_enable_clock(&RCC_APB2ENR, IOPCEN);
+
+ /* Enable clocks for GPIO port A (for GPIO_USART1_TX) and USART1. */
+ rcc_peripheral_enable_clock(&RCC_APB2ENR, IOPAEN);
+ rcc_peripheral_enable_clock(&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);
+ 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/other/rtc/rtc.ld b/examples/other/rtc/rtc.ld
new file mode 100644
index 0000000..b3bb9a4
--- /dev/null
+++ b/examples/other/rtc/rtc.ld
@@ -0,0 +1,31 @@
+/*
+ * This file is part of the libopenstm32 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 from libopenstm32. */
+INCLUDE libopenstm32.ld
+