aboutsummaryrefslogtreecommitdiff
path: root/examples/stm32f1/stm32-h103/timer/timer.c
diff options
context:
space:
mode:
Diffstat (limited to 'examples/stm32f1/stm32-h103/timer/timer.c')
-rw-r--r--examples/stm32f1/stm32-h103/timer/timer.c183
1 files changed, 0 insertions, 183 deletions
diff --git a/examples/stm32f1/stm32-h103/timer/timer.c b/examples/stm32f1/stm32-h103/timer/timer.c
deleted file mode 100644
index 48cae12..0000000
--- a/examples/stm32f1/stm32-h103/timer/timer.c
+++ /dev/null
@@ -1,183 +0,0 @@
-/*
- * This file is part of the libopencm3 project.
- *
- * Copyright (C) 2011 Piotr Esden-Tempski <piotr@esden.net>
- *
- * 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/timer.h>
-#include <libopencm3/stm32/nvic.h>
-#include <libopencm3/stm32/exti.h>
-
-u16 frequency_sequence[18] = {
- 1000,
- 500,
- 1000,
- 500,
- 1000,
- 500,
- 2000,
- 500,
- 2000,
- 500,
- 2000,
- 500,
- 1000,
- 500,
- 1000,
- 500,
- 1000,
- 5000
-};
-
-
-int frequency_sel = 0;
-
-u16 compare_time;
-u16 new_time;
-u16 frequency;
-int debug = 0;
-
-void clock_setup(void)
-{
- rcc_clock_setup_in_hse_8mhz_out_72mhz();
-
-}
-
-void gpio_setup(void)
-{
- /* Enable GPIOC clock. */
- rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPCEN);
-
- /*
- * Set GPIO12 (PORTC) (led) to
- * 'output alternate function push-pull'.
- */
- gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_50_MHZ,
- GPIO_CNF_OUTPUT_PUSHPULL, GPIO12);
-
- gpio_set(GPIOC, GPIO12);
-
-}
-
-void tim_setup(void)
-{
-
- /* Enable TIM2 clock. */
- rcc_peripheral_enable_clock(&RCC_APB1ENR, RCC_APB1ENR_TIM2EN);
-
-
- /* Enable TIM2 interrupt. */
- nvic_enable_irq(NVIC_TIM2_IRQ);
-
- /* Reset TIM2 peripheral */
- timer_reset(TIM2);
-
- /* Timer global mode:
- * - No divider
- * - alignment edge
- * - direction up
- */
- timer_set_mode(TIM2, TIM_CR1_CKD_CK_INT,
- TIM_CR1_CMS_EDGE,
- TIM_CR1_DIR_UP);
-
- /* Reset prescaler value. */
- timer_set_prescaler(TIM2, 36000);
-
- /* Enable preload. */
- timer_disable_preload(TIM2);
-
- /* Continous mode. */
- timer_continuous_mode(TIM2);
-
- /* Period (36kHz) */
- timer_set_period(TIM2, 65535);
-
- /* Disable outputs. */
- timer_disable_oc_output(TIM2, TIM_OC1);
- timer_disable_oc_output(TIM2, TIM_OC2);
- timer_disable_oc_output(TIM2, TIM_OC3);
- timer_disable_oc_output(TIM2, TIM_OC4);
-
- /* -- OC1 configuration -- */
-
- /* Configure global mode of line 1. */
- timer_disable_oc_clear(TIM2, TIM_OC1);
- timer_disable_oc_preload(TIM2, TIM_OC1);
- timer_set_oc_slow_mode(TIM2, TIM_OC1);
- timer_set_oc_mode(TIM2, TIM_OC1, TIM_OCM_FROZEN);
-
- /* Set the capture compare value for OC1. */
- timer_set_oc_value(TIM2, TIM_OC1, 1000);
-
- /* ---- */
- /* ARR reload enable */
- timer_disable_preload(TIM2);
-
- /* Counter enable */
- timer_enable_counter(TIM2);
-
- /* Enable commutation interrupt */
- timer_enable_irq(TIM2, TIM_DIER_CC1IE);
-}
-
-void tim2_isr(void)
-{
-
- if (timer_get_flag(TIM2, TIM_SR_CC1IF)) {
-
- /* Clear compare interrupt flag. */
- timer_clear_flag(TIM2, TIM_SR_CC1IF);
-
- /*
- * Get current timer value to calculate next
- * compare register value
- */
- compare_time = timer_get_counter(TIM2);
-
- /*
- * Calculate and set the next compare value.
- */
- frequency = frequency_sequence[frequency_sel++];
- new_time = compare_time + frequency;
-
- timer_set_oc_value(TIM2, TIM_OC1,
- new_time);
- if (frequency_sel == 18) {
- frequency_sel = 0;
- }
-
- /* Toggle led to indicate compare event */
- gpio_toggle(GPIOC, GPIO12);
-
- }
-}
-
-int main(void)
-{
-
- clock_setup();
- gpio_setup();
- tim_setup();
-
- while (1) {
- __asm("nop");
- }
-
- return 0;
-}