Add more RTC functions and an RTC example.
Thanks Lord James <lordjames@y7mail.com> for the patch!
This commit is contained in:
Uwe Hermann
@@ -24,7 +24,7 @@ Q := @
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MAKEFLAGS += --no-print-directory
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endif
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all: i2c_stts75_sensor adc_temperature_sensor dma_mem2mem timer_interrupt systick dogm128
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all: i2c_stts75_sensor adc_temperature_sensor dma_mem2mem timer_interrupt systick dogm128 rtc
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i2c_stts75_sensor:
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@printf " BUILD examples/other/i2c_stts75_sensor\n"
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@@ -50,6 +50,10 @@ dogm128:
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@printf " BUILD examples/other/dogm128\n"
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$(Q)$(MAKE) -C dogm128
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rtc:
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@printf " BUILD examples/other/rtc\n"
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$(Q)$(MAKE) -C rtc
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clean:
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@printf " CLEAN examples/other/i2c_stts75_sensor\n"
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$(Q)$(MAKE) -C i2c_stts75_sensor clean
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@@ -63,6 +67,8 @@ clean:
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$(Q)$(MAKE) -C systick clean
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@printf " CLEAN examples/other/dogm128\n"
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$(Q)$(MAKE) -C dogm128 clean
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@printf " CLEAN examples/other/rtc\n"
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$(Q)$(MAKE) -C rtc clean
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.PHONY: i2c_stts75_sensor adc_temperature_sensor dma_mem2mem timer_interrupt systick dogm128 clean
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.PHONY: i2c_stts75_sensor adc_temperature_sensor dma_mem2mem timer_interrupt systick dogm128 rtc clean
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95
examples/other/rtc/Makefile
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95
examples/other/rtc/Makefile
Normal file
@@ -0,0 +1,95 @@
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##
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## This file is part of the libopenstm32 project.
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##
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## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
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##
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## This program is free software: you can redistribute it and/or modify
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## it under the terms of the GNU General Public License as published by
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## the Free Software Foundation, either version 3 of the License, or
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## (at your option) any later version.
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##
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## This program is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU General Public License for more details.
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##
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## You should have received a copy of the GNU General Public License
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## along with this program. If not, see <http://www.gnu.org/licenses/>.
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##
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BINARY = rtc
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# PREFIX ?= arm-none-eabi
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PREFIX ?= arm-elf
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CC = $(PREFIX)-gcc
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LD = $(PREFIX)-ld
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OBJCOPY = $(PREFIX)-objcopy
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OBJDUMP = $(PREFIX)-objdump
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# Uncomment this line if you want to use the installed (not local) library.
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# TOOLCHAIN_DIR = `dirname \`which $(CC)\``/../$(PREFIX)
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TOOLCHAIN_DIR = ../../..
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CFLAGS = -O0 -g -Wall -Wextra -I$(TOOLCHAIN_DIR)/include -fno-common \
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-mcpu=cortex-m3 -mthumb
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LDSCRIPT = $(BINARY).ld
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LDFLAGS = -L$(TOOLCHAIN_DIR)/lib -T$(LDSCRIPT) -nostartfiles
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OBJS = $(BINARY).o
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OPENOCD_BASE = /usr
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OPENOCD = $(OPENOCD_BASE)/bin/openocd
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OPENOCD_SCRIPTS = $(OPENOCD_BASE)/share/openocd/scripts
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OPENOCD_FLASHER = $(OPENOCD_SCRIPTS)/interface/parport.cfg
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OPENOCD_BOARD = $(OPENOCD_SCRIPTS)/board/olimex_stm32_h103.cfg
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# Be silent per default, but 'make V=1' will show all compiler calls.
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ifneq ($(V),1)
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Q := @
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NULL := 2>/dev/null
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endif
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all: images
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images: $(BINARY)
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@printf " OBJCOPY $(BINARY).bin\n"
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$(Q)$(OBJCOPY) -Obinary $(BINARY) $(BINARY).bin
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@printf " OBJCOPY $(BINARY).hex\n"
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$(Q)$(OBJCOPY) -Oihex $(BINARY) $(BINARY).hex
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@printf " OBJCOPY $(BINARY).srec\n"
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$(Q)$(OBJCOPY) -Osrec $(BINARY) $(BINARY).srec
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@printf " OBJDUMP $(BINARY).list\n"
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$(Q)$(OBJDUMP) -S $(BINARY) > $(BINARY).list
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$(BINARY): $(OBJS) $(LDSCRIPT)
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@printf " LD $(subst $(shell pwd)/,,$(@))\n"
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$(Q)$(LD) $(LDFLAGS) -o $(BINARY) $(OBJS) -lopenstm32
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%.o: %.c Makefile
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@printf " CC $(subst $(shell pwd)/,,$(@))\n"
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$(Q)$(CC) $(CFLAGS) -o $@ -c $<
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clean:
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@printf " CLEAN $(subst $(shell pwd)/,,$(OBJS))\n"
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$(Q)rm -f *.o
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@printf " CLEAN $(BINARY)\n"
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$(Q)rm -f $(BINARY)
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@printf " CLEAN $(BINARY).bin\n"
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$(Q)rm -f $(BINARY).bin
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@printf " CLEAN $(BINARY).hex\n"
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$(Q)rm -f $(BINARY).hex
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@printf " CLEAN $(BINARY).srec\n"
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$(Q)rm -f $(BINARY).srec
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@printf " CLEAN $(BINARY).list\n"
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$(Q)rm -f $(BINARY).list
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flash: images
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@printf " FLASH $(BINARY).bin\n"
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@# IMPORTANT: Don't use "resume", only "reset" will work correctly!
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$(Q)$(OPENOCD) -s $(OPENOCD_SCRIPTS) \
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-f $(OPENOCD_FLASHER) \
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-f $(OPENOCD_BOARD) \
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-c "init" -c "reset halt" \
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-c "flash write_image erase $(BINARY).hex" \
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-c "reset" \
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-c "shutdown" $(NULL)
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.PHONY: images clean
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43
examples/other/rtc/README
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43
examples/other/rtc/README
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@@ -0,0 +1,43 @@
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------------------------------------------------------------------------------
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README
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------------------------------------------------------------------------------
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This is a small RTC example project.
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Building
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--------
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$ make
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Running 'make' on the top-level libopenstm32 directory will automatically
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also build this example. Or you can build the library "manually" and
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then run 'make' in this directory.
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You may want to override the toolchain (e.g., arm-elf or arm-none-eabi):
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$ PREFIX=arm-none-eabi make
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For a more verbose build you can use
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$ make V=1
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Flashing
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--------
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You can flash the generated code using OpenOCD:
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$ make flash
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Or you can do the same manually via:
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$ openocd -f interface/jtagkey-tiny.cfg -f board/olimex_stm32_h103.cfg
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$ telnet localhost 4444
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> reset halt
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> flash write_image erase rtc.hex
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> reset
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Replace the "jtagkey-tiny.cfg" with whatever JTAG device you are using, and/or
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replace "olimex_stm32_h103.cfg" with your respective board config file.
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116
examples/other/rtc/rtc.c
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116
examples/other/rtc/rtc.c
Normal file
@@ -0,0 +1,116 @@
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/*
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* This file is part of the libopenstm32 project.
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*
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* Copyright (C) 2010 Lord James <lordjames@y7mail.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <libopenstm32/rcc.h>
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#include <libopenstm32/gpio.h>
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#include <libopenstm32/usart.h>
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#include <libopenstm32/rtc.h>
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#include <libopenstm32/pwr.h>
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#include <libopenstm32/nvic.h>
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void clock_setup(void)
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{
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rcc_clock_setup_in_hse_8mhz_out_72mhz();
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/* Enable GPIOC clock. */
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rcc_peripheral_enable_clock(&RCC_APB2ENR, IOPCEN);
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/* Enable clocks for GPIO port A (for GPIO_USART1_TX) and USART1. */
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rcc_peripheral_enable_clock(&RCC_APB2ENR, IOPAEN);
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rcc_peripheral_enable_clock(&RCC_APB2ENR, USART1EN);
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}
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void usart_setup(void)
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{
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/* Setup GPIO pin GPIO_USART1_TX/GPIO9 on GPIO port A for transmit. */
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gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_50_MHZ,
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GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, GPIO_USART1_TX);
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/* Setup UART parameters. */
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usart_set_baudrate(USART1, 38400);
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usart_set_databits(USART1, 8);
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usart_set_stopbits(USART1, USART_STOPBITS_1);
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usart_set_mode(USART1, USART_MODE_TX);
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usart_set_parity(USART1, USART_PARITY_NONE);
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usart_set_flow_control(USART1, USART_FLOWCONTROL_NONE);
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/* Finally enable the USART. */
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usart_enable(USART1);
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}
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void gpio_setup(void)
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{
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/* Set GPIO12 (in GPIO port C) to 'output push-pull'. */
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gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_2_MHZ,
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GPIO_CNF_OUTPUT_PUSHPULL, GPIO12);
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}
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void nvic_setup(void)
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{
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/* Without this the RTC interrupt routine will never be called. */
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nvic_enable_irq(NVIC_RTC_IRQ);
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nvic_set_priority(NVIC_RTC_IRQ, 1);
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}
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void rtc_isr(void)
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{
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volatile u32 j = 0, c = 0;
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/* The interrupt flag isn't cleared by hardware, we have to do it. */
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rtc_clear_flag(RTC_SEC);
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/* Visual output. */
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gpio_toggle(GPIOC, GPIO12);
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c = rtc_get_counter_val();
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/* Display the current counter value in binary via USART1. */
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for (j = 0; j < 32; j++) {
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if ((c & (0x80000000 >> j)) != 0) {
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usart_send(USART1, '1');
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} else {
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usart_send(USART1, '0');
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}
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}
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usart_send(USART1, '\n');
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}
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int main(void)
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{
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clock_setup();
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gpio_setup();
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usart_setup();
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/*
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* If the RTC is pre-configured just allow access, don't reconfigure.
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* Otherwise enable it with the LSE as clock source and 0x7fff as
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* prescale value.
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*/
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rtc_auto_awake(LSE, 0x7fff);
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/* Setup the RTC interrupt. */
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nvic_setup();
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/* Enable the RTC interrupt to occur off the SEC flag. */
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rtc_interrupt_enable(RTC_SEC);
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while(1);
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return 0;
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}
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31
examples/other/rtc/rtc.ld
Normal file
31
examples/other/rtc/rtc.ld
Normal file
@@ -0,0 +1,31 @@
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/*
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* This file is part of the libopenstm32 project.
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*
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* Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/* Linker script for Olimex STM32-H103 (STM32F103RBT6, 128K flash, 20K RAM). */
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/* Define memory regions. */
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MEMORY
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{
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rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K
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ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
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}
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/* Include the common ld script from libopenstm32. */
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INCLUDE libopenstm32.ld
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