timer.h ( File view )

  • By gregkam 2014-10-06
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			/*
 * timer.h --- STM32F4 tick timer and PPM decoder.
 *
 * Copyright (C) 2012, Galois, Inc.
 * All Rights Reserved.
 *
 * This software is released under the "BSD3" license.  Read the file
 * "LICENSE" for more information.
 */

#ifndef __hwf4_timer_h
#define __hwf4_timer_h

#include <stdint.h>
#include <sys/types.h>

#ifdef __cplusplus
extern "C" {

#endif

/** Maximum number of PPM channels to decode. */
#define PPM_MAX_CHANNELS  12

/**
 * An unsigned integer count of ticks since timer initialization.
 *
 * This value will not wrap for over 500,000 years, so it is pretty
 * safe to rely on the fact that it will not wrap around.
 */
typedef uint64_t timer_tick_t;

/** Initialize the timer subsystem. */
void timer_init(void);

/**
 * Return the number of microsecond ticks since timer initialization.
 *
 * This is safe to call from an ISR.
 */
uint64_t timer_get_ticks(void);

/**
 * Delay for "delay" milliseconds.  This is implemented using an RTOS
 * system call, so it will not block other threads from running.
 *
 * @param delay wait delay in milliseconds
 */
void timer_msleep(uint32_t delay);

/**
 * Busy wait for "delay" (up to 65535) microseconds.  This should only
 * be used for short delays as we prevent FreeRTOS from context
 * switching during the delay.
 *
 * @param delay wait delay in microseconds
 */
void timer_usleep(uint16_t delay);

/**
 * Return true if there is valid PPM available.
 */
bool timer_is_ppm_valid(void);

/**
 * Read one channel from the last PPM sample buffer.
 *
 * @param ch channel num
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01.97 kB
.gitignore19.00 B2013-04-23|01:09
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.gitignore8.00 B2013-04-23|01:09
build.mk1.82 kB2013-04-23|01:09
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default_handlers.c6.01 kB2013-04-23|01:09
default_hooks.c159.00 B2013-04-23|01:09
syscalls.c3.28 kB2013-04-23|01:09
Makefile327.00 B2013-04-23|01:09
README.md217.00 B2013-04-23|01:09
config.mk.example151.00 B2013-04-23|01:09
01.97 kB
FreeRTOSConfig.h8.59 kB2013-04-23|01:09
arm_common_tables.h1.09 kB2013-04-23|01:09
arm_math.h234.69 kB2013-04-23|01:09
core_cm0.h31.20 kB2013-04-23|01:09
core_cm3.h68.09 kB2013-04-23|01:09
core_cm4.h77.42 kB2013-04-23|01:09
core_cm4_simd.h23.42 kB2013-04-23|01:09
core_cmFunc.h15.32 kB2013-04-23|01:09
core_cmInstr.h15.73 kB2013-04-23|01:09
stm32f4xx.h507.96 kB2013-04-23|01:09
system_stm32f4xx.h2.17 kB2013-04-23|01:09
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cortex-m4.mk646.00 B2013-04-23|01:09
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stm32f4.mk131.00 B2013-04-23|01:09
command.mk768.00 B2013-04-23|01:09
toolchain.mk150.00 B2013-04-23|01:09
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build.mk227.00 B2013-04-23|01:09
startup_stm32f4xx.s22.85 kB2013-04-23|01:09
system_stm32f4xx.c22.24 kB2013-04-23|01:09
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build.mk1.04 kB2013-04-23|01:09
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eeprom.h1.97 kB2013-04-23|01:09
gpio.h14.62 kB2013-04-23|01:09
i2c.h1.63 kB2013-04-23|01:09
interrupt.h1.61 kB2013-04-23|01:09
led.h904.00 B2013-04-23|01:09
rcc.h1.65 kB2013-04-23|01:09
spi.h3.46 kB2013-04-23|01:09
01.97 kB
irq.h6.68 kB2013-04-23|01:09
timer.h2.26 kB2013-04-23|01:09
usart.h3.38 kB2013-04-23|01:09
usb_cdc.h1.32 kB2013-04-23|01:09
01.97 kB
eeprom.c2.97 kB2013-04-23|01:09
fault.c1.38 kB2013-04-23|01:09
gpio.c5.12 kB2013-04-23|01:09
i2c.c9.10 kB2013-04-23|01:09
interrupt.c744.00 B2013-04-23|01:09
led.c2.11 kB2013-04-23|01:09
rcc.c11.74 kB2013-04-23|01:09
spi.c12.33 kB2013-04-23|01:09
timer.c10.08 kB2013-04-23|01:09
usart.c10.83 kB2013-04-23|01:09
usb_cdc.c1.21 kB2013-04-23|01:09
01.97 kB
gdb-init61.00 B2013-04-23|01:09
gdb-tdesc-cortexm-fpa.xml5.74 kB2013-04-23|01:09
openocd-stm32f4.cfg124.00 B2013-04-23|01:09
stm32_flash.ld5.33 kB2013-04-23|01:09
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main.c2.92 kB2013-04-23|01:09
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main.c1.51 kB2013-04-23|01:09
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build.mk1.12 kB2013-04-23|01:09
main.c740.00 B2013-04-23|01:09
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main.c11.32 kB2013-04-23|01:09
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main.c2.51 kB2013-04-23|01:09
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main.c1.90 kB2013-04-23|01:09
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build.mk1.17 kB2013-04-23|01:09
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usb_core.h12.29 kB2013-04-23|01:09
usb_dcd.h4.48 kB2013-04-23|01:09
usb_dcd_int.h3.03 kB2013-04-23|01:09
usb_defines.h6.52 kB2013-04-23|01:09
usb_hcd.h2.76 kB2013-04-23|01:09
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usb_otg.h1.97 kB2013-04-23|01:09
usb_regs.h21.22 kB2013-04-23|01:09
usbd_cdc_core.h3.87 kB2013-04-23|01:09
usbd_cdc_if_template.h1.85 kB2013-04-23|01:09
usbd_cdc_vcp.h2.89 kB2013-04-23|01:09
usbd_conf.h3.29 kB2013-04-23|01:09
usbd_core.h2.50 kB2013-04-23|01:09
usbd_def.h4.82 kB2013-04-23|01:09
usbd_desc.h3.35 kB2013-04-23|01:09
usbd_ioreq.h2.89 kB2013-04-23|01:09
usbd_req.h2.50 kB2013-04-23|01:09
usbd_usr.h3.00 kB2013-04-23|01:09
01.97 kB
usb_bsp.c3.27 kB2013-04-23|01:09
usb_core.c55.46 kB2013-04-23|01:09
usb_dcd.c9.21 kB2013-04-23|01:09
usb_dcd_int.c21.32 kB2013-04-23|01:09
usb_hcd.c5.62 kB2013-04-23|01:09
usb_hcd_int.c21.58 kB2013-04-23|01:09
usb_otg.c9.48 kB2013-04-23|01:09
usbd_cdc_core.c24.57 kB2013-04-23|01:09
usbd_cdc_if_template.c6.07 kB2013-04-23|01:09
usbd_cdc_vcp.c6.71 kB2013-04-23|01:09
usbd_core.c11.39 kB2013-04-23|01:09
usbd_desc.c8.23 kB2013-04-23|01:09
usbd_ioreq.c5.38 kB2013-04-23|01:09
usbd_req.c19.55 kB2013-04-23|01:09
usbd_usr.c3.48 kB2013-04-23|01:09
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