From bc5146b710c8be3dfa4a8601bd3ca29408ae6397 Mon Sep 17 00:00:00 2001 From: chrysn Date: Thu, 18 Oct 2012 22:26:46 +0200 Subject: unified systick handling the only change this results in in the example binaries is in the hackrf-jellybean/systick example, where the the check in systick_set_clocksource for overflowing from the stm32 area gets used. --- .../lpc43xx/hackrf-jellybean/systick/systickdemo.c | 2 +- examples/stm32/f1/lisa-m-1/can/can.c | 2 +- examples/stm32/f1/lisa-m-1/usb_hid/usbhid.c | 2 +- .../lisa-m-2/usart_irq_printf/usart_irq_printf.c | 2 +- examples/stm32/f1/obldc/can/can.c | 2 +- examples/stm32/f1/obldc/systick/systick.c | 2 +- examples/stm32/f1/other/systick/systick.c | 2 +- examples/stm32/f1/other/usb_hid/usbhid.c | 2 +- .../stm32-h103/usart_irq_printf/usart_irq_printf.c | 2 +- examples/stm32/f1/stm32-h103/usb_hid/usbhid.c | 2 +- include/libopencm3/cm3/systick.h | 113 ++++++++++++++++ include/libopencm3/lpc43xx/systick.h | 88 ------------ include/libopencm3/stm32/systick.h | 111 --------------- lib/cm3/systick.c | 149 +++++++++++++++++++++ lib/lpc43xx/systick.c | 69 ---------- lib/stm32/systick.c | 139 ------------------- 16 files changed, 272 insertions(+), 417 deletions(-) create mode 100644 include/libopencm3/cm3/systick.h delete mode 100644 include/libopencm3/lpc43xx/systick.h delete mode 100644 include/libopencm3/stm32/systick.h create mode 100644 lib/cm3/systick.c delete mode 100644 lib/lpc43xx/systick.c delete mode 100644 lib/stm32/systick.c diff --git a/examples/lpc43xx/hackrf-jellybean/systick/systickdemo.c b/examples/lpc43xx/hackrf-jellybean/systick/systickdemo.c index 61792d1..d38b0bc 100644 --- a/examples/lpc43xx/hackrf-jellybean/systick/systickdemo.c +++ b/examples/lpc43xx/hackrf-jellybean/systick/systickdemo.c @@ -21,7 +21,7 @@ #include #include #include -#include +#include #include #include "../jellybean_conf.h" diff --git a/examples/stm32/f1/lisa-m-1/can/can.c b/examples/stm32/f1/lisa-m-1/can/can.c index 92ebd85..41432b6 100644 --- a/examples/stm32/f1/lisa-m-1/can/can.c +++ b/examples/stm32/f1/lisa-m-1/can/can.c @@ -22,7 +22,7 @@ #include #include #include -#include +#include #include struct can_tx_msg { diff --git a/examples/stm32/f1/lisa-m-1/usb_hid/usbhid.c b/examples/stm32/f1/lisa-m-1/usb_hid/usbhid.c index a0a4d12..f5f0146 100644 --- a/examples/stm32/f1/lisa-m-1/usb_hid/usbhid.c +++ b/examples/stm32/f1/lisa-m-1/usb_hid/usbhid.c @@ -21,7 +21,7 @@ #include #include #include -#include +#include #include #include #include diff --git a/examples/stm32/f1/lisa-m-2/usart_irq_printf/usart_irq_printf.c b/examples/stm32/f1/lisa-m-2/usart_irq_printf/usart_irq_printf.c index e4e0127..dd2e221 100644 --- a/examples/stm32/f1/lisa-m-2/usart_irq_printf/usart_irq_printf.c +++ b/examples/stm32/f1/lisa-m-2/usart_irq_printf/usart_irq_printf.c @@ -22,7 +22,7 @@ #include #include #include -#include +#include #include #include diff --git a/examples/stm32/f1/obldc/can/can.c b/examples/stm32/f1/obldc/can/can.c index a29d8d7..281ab1d 100644 --- a/examples/stm32/f1/obldc/can/can.c +++ b/examples/stm32/f1/obldc/can/can.c @@ -22,7 +22,7 @@ #include #include #include -#include +#include #include struct can_tx_msg { diff --git a/examples/stm32/f1/obldc/systick/systick.c b/examples/stm32/f1/obldc/systick/systick.c index 7abdd54..1426793 100644 --- a/examples/stm32/f1/obldc/systick/systick.c +++ b/examples/stm32/f1/obldc/systick/systick.c @@ -22,7 +22,7 @@ #include #include #include -#include +#include u32 temp32; diff --git a/examples/stm32/f1/other/systick/systick.c b/examples/stm32/f1/other/systick/systick.c index 9aa2e94..c04704d 100644 --- a/examples/stm32/f1/other/systick/systick.c +++ b/examples/stm32/f1/other/systick/systick.c @@ -21,7 +21,7 @@ #include #include #include -#include +#include u32 temp32; diff --git a/examples/stm32/f1/other/usb_hid/usbhid.c b/examples/stm32/f1/other/usb_hid/usbhid.c index 6329f0e..a61d9ea 100644 --- a/examples/stm32/f1/other/usb_hid/usbhid.c +++ b/examples/stm32/f1/other/usb_hid/usbhid.c @@ -20,7 +20,7 @@ #include #include #include -#include +#include #include #include diff --git a/examples/stm32/f1/stm32-h103/usart_irq_printf/usart_irq_printf.c b/examples/stm32/f1/stm32-h103/usart_irq_printf/usart_irq_printf.c index 5effb28..b052dc3 100644 --- a/examples/stm32/f1/stm32-h103/usart_irq_printf/usart_irq_printf.c +++ b/examples/stm32/f1/stm32-h103/usart_irq_printf/usart_irq_printf.c @@ -22,7 +22,7 @@ #include #include #include -#include +#include #include #include diff --git a/examples/stm32/f1/stm32-h103/usb_hid/usbhid.c b/examples/stm32/f1/stm32-h103/usb_hid/usbhid.c index d0c2aff..1c27c2f 100644 --- a/examples/stm32/f1/stm32-h103/usb_hid/usbhid.c +++ b/examples/stm32/f1/stm32-h103/usb_hid/usbhid.c @@ -20,7 +20,7 @@ #include #include #include -#include +#include #include #include diff --git a/include/libopencm3/cm3/systick.h b/include/libopencm3/cm3/systick.h new file mode 100644 index 0000000..5e7715b --- /dev/null +++ b/include/libopencm3/cm3/systick.h @@ -0,0 +1,113 @@ +/* + * This file is part of the libopencm3 project. + * + * Copyright (C) 2010 Thomas Otto + * Copyright (C) 2012 Benjamin Vernoux + * + * This library is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This library 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 Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this library. If not, see . + */ +/** @defgroup CM3_systick_defines SysTick Defines + +@brief libopencm3 Defined Constants and Types for the Cortex SysTick + +@ingroup CM3_defines + +@version 1.0.0 + +@author @htmlonly © @endhtmlonly 2010 Thomas Otto + +@date 19 August 2012 + +LGPL License Terms @ref lgpl_license + */ + +/**@{*/ + +#ifndef LIBOPENCM3_SYSTICK_H +#define LIBOPENCM3_SYSTICK_H + +#include +#include + +/* --- SYSTICK registers --------------------------------------------------- */ + +/* Control and status register (STK_CTRL) */ +#define STK_CTRL MMIO32(SYS_TICK_BASE + 0x00) + +/* reload value register (STK_LOAD) */ +#define STK_LOAD MMIO32(SYS_TICK_BASE + 0x04) + +/* current value register (STK_VAL) */ +#define STK_VAL MMIO32(SYS_TICK_BASE + 0x08) + +/* calibration value register (STK_CALIB) */ +#define STK_CALIB MMIO32(SYS_TICK_BASE + 0x0C) + +/* --- STK_CTRL values ----------------------------------------------------- */ +/* Bits [31:17] Reserved, must be kept cleared. */ +/* COUNTFLAG: */ +#define STK_CTRL_COUNTFLAG (1 << 16) +/* Bits [15:3] Reserved, must be kept cleared. */ +/* CLKSOURCE: Clock source selection */ +#define STK_CTRL_CLKSOURCE (1 << 2) +#define STK_CTRL_CLKSOURCE_LSB 2 +/** @defgroup systick_clksource Clock source selection +@ingroup CM3_systick_defines + +@{*/ +#define STK_CTRL_CLKSOURCE_AHB_DIV8 0 +#define STK_CTRL_CLKSOURCE_AHB 1 +/**@}*/ + +/* TICKINT: SysTick exception request enable */ +#define STK_CTRL_TICKINT (1 << 1) +/* ENABLE: Counter enable */ +#define STK_CTRL_ENABLE (1 << 0) + +/* --- STK_LOAD values ----------------------------------------------------- */ +/* Bits [31:24] Reserved, must be kept cleared. */ +/* RELOAD[23:0]: RELOAD value */ + +/* --- STK_VAL values ------------------------------------------------------ */ +/* Bits [31:24] Reserved, must be kept cleared. */ +/* CURRENT[23:0]: Current counter value */ + +/* --- STK_CALIB values ---------------------------------------------------- */ +/* NOREF: NOREF flag */ +#define STK_CALIB_NOREF (1 << 31) +/* SKEW: SKEW flag */ +#define STK_CALIB_SKEW (1 << 30) +/* Bits [29:24] Reserved, must be kept cleared. */ +/* TENMS[23:0]: Calibration value */ + +/* --- Function Prototypes ------------------------------------------------- */ + +BEGIN_DECLS + +void systick_set_reload(u32 value); +u32 systick_get_value(void); +void systick_set_clocksource(u8 clocksource); +void systick_interrupt_enable(void); +void systick_interrupt_disable(void); +void systick_counter_enable(void); +void systick_counter_disable(void); +u8 systick_get_countflag(void); + +u32 systick_get_calib(void); + +END_DECLS + +#endif +/**@}*/ + diff --git a/include/libopencm3/lpc43xx/systick.h b/include/libopencm3/lpc43xx/systick.h deleted file mode 100644 index 2ae52c2..0000000 --- a/include/libopencm3/lpc43xx/systick.h +++ /dev/null @@ -1,88 +0,0 @@ -/* - * This file is part of the libopencm3 project. - * - * Copyright (C) 2010 Thomas Otto - * Copyright (C) 2012 Benjamin Vernoux - * - * This library is free software: you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * This library 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 Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public License - * along with this library. If not, see . - */ - -#ifndef LIBOPENCM3_SYSTICK_H -#define LIBOPENCM3_SYSTICK_H - -#include -#include -#include - -/* --- SYSTICK registers --------------------------------------------------- */ -/* See also libopencm3\cm3\scs.h for details on SysTicks registers */ - -/* Control and status register (STK_CTRL) */ -#define STK_CTRL MMIO32(SYS_TICK_BASE + 0x00) - -/* reload value register (STK_LOAD) */ -#define STK_LOAD MMIO32(SYS_TICK_BASE + 0x04) - -/* current value register (STK_VAL) */ -#define STK_VAL MMIO32(SYS_TICK_BASE + 0x08) - -/* calibration value register (STK_CALIB) */ -#define STK_CALIB MMIO32(SYS_TICK_BASE + 0x0C) - -/* --- STK_CTRL values ----------------------------------------------------- */ -/* Bits [31:17] Reserved, must be kept cleared. */ -/* COUNTFLAG: */ -#define STK_CTRL_COUNTFLAG (1 << 16) -/* Bits [15:3] Reserved, must be kept cleared. */ -/* CLKSOURCE: Clock source selection */ -#define STK_CTRL_CLKSOURCE (1 << 2) -/* TICKINT: SysTick exception request enable */ -#define STK_CTRL_TICKINT (1 << 1) -/* ENABLE: Counter enable */ -#define STK_CTRL_ENABLE (1 << 0) - -/* --- STK_LOAD values ----------------------------------------------------- */ -/* Bits [31:24] Reserved, must be kept cleared. */ -/* RELOAD[23:0]: RELOAD value */ - -/* --- STK_VAL values ------------------------------------------------------ */ -/* Bits [31:24] Reserved, must be kept cleared. */ -/* CURRENT[23:0]: Current counter value */ - -/* --- STK_CALIB values ---------------------------------------------------- */ -/* NOREF: NOREF flag */ -#define STK_CALIB_NOREF (1 << 31) -/* SKEW: SKEW flag */ -#define STK_CALIB_SKEW (1 << 30) -/* Bits [29:24] Reserved, must be kept cleared. */ -/* TENMS[23:0]: Calibration value */ - -/* --- Function Prototypes ------------------------------------------------- */ - -BEGIN_DECLS - -void systick_set_reload(u32 value); -u32 systick_get_value(void); -void systick_set_clocksource(u8 clocksource); -void systick_interrupt_enable(void); -void systick_interrupt_disable(void); -void systick_counter_enable(void); -void systick_counter_disable(void); -u8 systick_get_countflag(void); - -u32 systick_get_calib(void); - -END_DECLS - -#endif diff --git a/include/libopencm3/stm32/systick.h b/include/libopencm3/stm32/systick.h deleted file mode 100644 index e42c4e6..0000000 --- a/include/libopencm3/stm32/systick.h +++ /dev/null @@ -1,111 +0,0 @@ -/** @defgroup STM32F_systick_defines SysTick Defines - -@brief libopencm3 Defined Constants and Types for the STM32F SysTick - -@ingroup STM32F_defines - -@version 1.0.0 - -@author @htmlonly © @endhtmlonly 2010 Thomas Otto - -@date 19 August 2012 - -LGPL License Terms @ref lgpl_license - */ - -/* - * This file is part of the libopencm3 project. - * - * Copyright (C) 2010 Thomas Otto - * - * This library is free software: you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * This library 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 Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public License - * along with this library. If not, see . - */ - -/**@{*/ - -#ifndef LIBOPENCM3_SYSTICK_H -#define LIBOPENCM3_SYSTICK_H - -#include -#include - -/* --- SYSTICK registers --------------------------------------------------- */ - -/* Control and status register (STK_CTRL) */ -#define STK_CTRL MMIO32(SYS_TICK_BASE + 0x00) - -/* reload value register (STK_LOAD) */ -#define STK_LOAD MMIO32(SYS_TICK_BASE + 0x04) - -/* current value register (STK_VAL) */ -#define STK_VAL MMIO32(SYS_TICK_BASE + 0x08) - -/* calibration value register (STK_CALIB) */ -#define STK_CALIB MMIO32(SYS_TICK_BASE + 0x0C) - -/* --- STK_CTRL values ----------------------------------------------------- */ -/* Bits [31:17] Reserved, must be kept cleared. */ -/* COUNTFLAG: */ -#define STK_CTRL_COUNTFLAG (1 << 16) -/* Bits [15:3] Reserved, must be kept cleared. */ -/* CLKSOURCE: Clock source selection */ -#define STK_CTRL_CLKSOURCE (1 << 2) -#define STK_CTRL_CLKSOURCE_LSB 2 -/** @defgroup systick_clksource Clock source selection -@ingroup STM32F_systick_defines - -@{*/ -#define STK_CTRL_CLKSOURCE_AHB_DIV8 0 -#define STK_CTRL_CLKSOURCE_AHB 1 -/**@}*/ - -/* TICKINT: SysTick exception request enable */ -#define STK_CTRL_TICKINT (1 << 1) -/* ENABLE: Counter enable */ -#define STK_CTRL_ENABLE (1 << 0) - -/* --- STK_LOAD values ----------------------------------------------------- */ -/* Bits [31:24] Reserved, must be kept cleared. */ -/* RELOAD[23:0]: RELOAD value */ - -/* --- STK_VAL values ------------------------------------------------------ */ -/* Bits [31:24] Reserved, must be kept cleared. */ -/* CURRENT[23:0]: Current counter value */ - -/* --- STK_CALIB values ---------------------------------------------------- */ -/* NOREF: NOREF flag */ -#define STK_CALIB_NOREF (1 << 31) -/* SKEW: SKEW flag */ -#define STK_CALIB_SKEW (1 << 30) -/* Bits [29:24] Reserved, must be kept cleared. */ -/* TENMS[23:0]: Calibration value */ - -/* --- Function Prototypes ------------------------------------------------- */ - -BEGIN_DECLS - -void systick_set_reload(u32 value); -u32 systick_get_value(void); -void systick_set_clocksource(u8 clocksource); -void systick_interrupt_enable(void); -void systick_interrupt_disable(void); -void systick_counter_enable(void); -void systick_counter_disable(void); -u8 systick_get_countflag(void); - -END_DECLS - -#endif -/**@}*/ - diff --git a/lib/cm3/systick.c b/lib/cm3/systick.c new file mode 100644 index 0000000..325ffff --- /dev/null +++ b/lib/cm3/systick.c @@ -0,0 +1,149 @@ +/* + * This file is part of the libopencm3 project. + * + * Copyright (C) 2010 Thomas Otto + * Copyright (C) 2012 Benjamin Vernoux + * + * This library is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This library 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 Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this library. If not, see . + */ +/** @defgroup CM3_systick_file SysTick + +@ingroup CM3_files + +@brief libopencm3 Cortex System Tick Timer + +@version 1.0.0 + +@author @htmlonly © @endhtmlonly 2010 Thomas Otto + +@date 19 August 2012 + +This library supports the System Tick timer in ARM Cortex Microcontrollers. + +The System Tick timer is part of the ARM Cortex core. It is a 24 bit +down counter that can be configured with an automatical reload value. + +LGPL License Terms @ref lgpl_license + */ + +/**@{*/ +#include + +/*-----------------------------------------------------------------------------*/ +/** @brief SysTick Set the Automatic Reload Value. + +The counter is set to the reload value when the counter starts and after it +reaches zero. + +@param[in] value u32. 24 bit reload value. +*/ + +void systick_set_reload(u32 value) +{ + STK_LOAD = (value & 0x00FFFFFF); +} + +/*-----------------------------------------------------------------------------*/ +/** @brief SysTick Read the Automatic Reload Value. + +@returns 24 bit reload value as u32. +*/ + +u32 systick_get_value(void) +{ + return STK_VAL; +} + +/*-----------------------------------------------------------------------------*/ +/** @brief Set the SysTick Clock Source. + +The clock source can be either the AHB clock or the same clock divided by 8. + +@param[in] clocksource u8. Clock source from @ref systick_clksource. +*/ + +void systick_set_clocksource(u8 clocksource) +{ + if (clocksource < 2) + STK_CTRL |= (clocksource << STK_CTRL_CLKSOURCE_LSB); +} + +/*-----------------------------------------------------------------------------*/ +/** @brief Enable SysTick Interrupt. + +*/ + +void systick_interrupt_enable(void) +{ + STK_CTRL |= STK_CTRL_TICKINT; +} + +/*-----------------------------------------------------------------------------*/ +/** @brief Disable SysTick Interrupt. + +*/ + +void systick_interrupt_disable(void) +{ + STK_CTRL &= ~STK_CTRL_TICKINT; +} + +/*-----------------------------------------------------------------------------*/ +/** @brief Enable SysTick Counter. + +*/ + +void systick_counter_enable(void) +{ + STK_CTRL |= STK_CTRL_ENABLE; +} + +/*-----------------------------------------------------------------------------*/ +/** @brief Disable SysTick Counter. + +*/ + +void systick_counter_disable(void) +{ + STK_CTRL &= ~STK_CTRL_ENABLE; +} + +/*-----------------------------------------------------------------------------*/ +/** @brief SysTick Read the Counter Flag. + +The count flag is set when the timer count becomes zero, and is cleared when the +flag is read. + +@returns Boolean if flag set. +*/ + +u8 systick_get_countflag(void) +{ + if (STK_CTRL & STK_CTRL_COUNTFLAG) + return 1; + else + return 0; +} + +/*-----------------------------------------------------------------------------*/ +/** @brief SysTick Get Calibration Value + +@returns Current calibration value +*/ +u32 systick_get_calib(void) +{ + return (STK_CALIB&0x00FFFFFF); +} +/**@}*/ + diff --git a/lib/lpc43xx/systick.c b/lib/lpc43xx/systick.c deleted file mode 100644 index 82345a9..0000000 --- a/lib/lpc43xx/systick.c +++ /dev/null @@ -1,69 +0,0 @@ -/* - * This file is part of the libopencm3 project. - * - * Copyright (C) 2010 Thomas Otto - * Copyright (C) 2012 Benjamin Vernoux - * - * This library is free software: you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * This library 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 Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public License - * along with this library. If not, see . - */ - -#include - -void systick_set_reload(u32 value) -{ - STK_LOAD = (value & 0x00FFFFFF); -} - -u32 systick_get_value(void) -{ - return STK_VAL; -} - -void systick_set_clocksource(u8 clocksource) -{ - STK_CTRL |= clocksource; -} - -void systick_interrupt_enable(void) -{ - STK_CTRL |= STK_CTRL_TICKINT; -} - -void systick_interrupt_disable(void) -{ - STK_CTRL &= ~STK_CTRL_TICKINT; -} - -void systick_counter_enable(void) -{ - STK_CTRL |= STK_CTRL_ENABLE; -} - -void systick_counter_disable(void) -{ - STK_CTRL &= ~STK_CTRL_ENABLE; -} - -u8 systick_get_countflag(void) -{ - if (STK_CTRL & STK_CTRL_COUNTFLAG) - return 1; - else - return 0; -} - -u32 systick_get_calib(void) -{ - return (STK_CALIB&0x00FFFFFF); -} diff --git a/lib/stm32/systick.c b/lib/stm32/systick.c deleted file mode 100644 index 36077cc..0000000 --- a/lib/stm32/systick.c +++ /dev/null @@ -1,139 +0,0 @@ -/** @defgroup STM32F_systick_file SysTick - -@ingroup STM32F_files - -@brief libopencm3 STM32Fxx System Tick Timer - -@version 1.0.0 - -@author @htmlonly © @endhtmlonly 2010 Thomas Otto - -@date 19 August 2012 - -This library supports the System Tick timer in the -STM32F series of ARM Cortex Microcontrollers by ST Microelectronics. - -The System Tick timer is part of the ARM Cortex core. It is a 24 bit -down counter that can be configured with an automatical reload value. - -LGPL License Terms @ref lgpl_license - */ -/* - * This file is part of the libopencm3 project. - * - * Copyright (C) 2010 Thomas Otto - * - * This library is free software: you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * This library 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 Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public License - * along with this library. If not, see . - */ - -/**@{*/ -#include - -/*-----------------------------------------------------------------------------*/ -/** @brief SysTick Set the Automatic Reload Value. - -The counter is set to the reload value when the counter starts and after it -reaches zero. - -@param[in] value u32. 24 bit reload value. -*/ - -void systick_set_reload(u32 value) -{ - STK_LOAD = (value & 0x00FFFFFF); -} - -/*-----------------------------------------------------------------------------*/ -/** @brief SysTick Read the Automatic Reload Value. - -@returns 24 bit reload value as u32. -*/ - -u32 systick_get_value(void) -{ - return STK_VAL; -} - -/*-----------------------------------------------------------------------------*/ -/** @brief Set the SysTick Clock Source. - -The clock source can be either the AHB clock or the same clock divided by 8. - -@param[in] clocksource u8. Clock source from @ref systick_clksource. -*/ - -void systick_set_clocksource(u8 clocksource) -{ - if (clocksource < 2) - STK_CTRL |= (clocksource << STK_CTRL_CLKSOURCE_LSB); -} - -/*-----------------------------------------------------------------------------*/ -/** @brief Enable SysTick Interrupt. - -*/ - -void systick_interrupt_enable(void) -{ - STK_CTRL |= STK_CTRL_TICKINT; -} - -/*-----------------------------------------------------------------------------*/ -/** @brief Disable SysTick Interrupt. - -*/ - -void systick_interrupt_disable(void) -{ - STK_CTRL &= ~STK_CTRL_TICKINT; -} - -/*-----------------------------------------------------------------------------*/ -/** @brief Enable SysTick Counter. - -*/ - -void systick_counter_enable(void) -{ - STK_CTRL |= STK_CTRL_ENABLE; -} - -/*-----------------------------------------------------------------------------*/ -/** @brief Disable SysTick Counter. - -*/ - -void systick_counter_disable(void) -{ - STK_CTRL &= ~STK_CTRL_ENABLE; -} - -/*-----------------------------------------------------------------------------*/ -/** @brief SysTick Read the Counter Flag. - -The count flag is set when the timer count becomes zero, and is cleared when the -flag is read. - -@returns Boolean if flag set. -*/ - -u8 systick_get_countflag(void) -{ - if (STK_CTRL & STK_CTRL_COUNTFLAG) - return 1; - else - return 0; -} -/**@}*/ - -- cgit v1.2.3