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Diffstat (limited to 'examples/stm32f1/stm32-discovery/rtc/rtc.c')
-rw-r--r--examples/stm32f1/stm32-discovery/rtc/rtc.c129
1 files changed, 0 insertions, 129 deletions
diff --git a/examples/stm32f1/stm32-discovery/rtc/rtc.c b/examples/stm32f1/stm32-discovery/rtc/rtc.c
deleted file mode 100644
index fa8a966..0000000
--- a/examples/stm32f1/stm32-discovery/rtc/rtc.c
+++ /dev/null
@@ -1,129 +0,0 @@
-/*
- * This file is part of the libopencm3 project.
- *
- * Copyright (C) 2010 Lord James <lordjames@y7mail.com>
- * Copyright (C) 2011 Mark Panajotovic <marko@electrontube.org>
- *
- * 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_24mhz();
-
- /* 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);
- /* TODO usart_set_baudrate() doesn't support 24MHz clock (yet). */
- /* This is the equivalent: */
- USART_BRR(USART1) = (u16)((24000000 << 4) / (38400 * 16));
-
- 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 GPIO8 (in GPIO port C) to 'output push-pull'. */
- /* This drives the blue LED on the STM32VLDISCOVERY. */
- gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_2_MHZ,
- GPIO_CNF_OUTPUT_PUSHPULL, GPIO8);
-}
-
-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, GPIO8);
-
- 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_blocking(USART1, '1');
- else
- usart_send_blocking(USART1, '0');
- }
- usart_send_blocking(USART1, '\n');
- usart_send_blocking(USART1, '\r');
-}
-
-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);
-
- /* The above mode will not reset the RTC when you press the RST button.
- * It will also continue to count while the MCU is held in reset. If
- * you want it to reset, comment out the above and use the following:
- */
- // rtc_awake_from_off(LSE);
- // rtc_set_prescale_val(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;
-}