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[Cortex] Add preliminary support for core-dependent defines ARMv6m / ARMv7m, ARMv7em

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This commit is contained in:
BuFran
2013-07-22 18:43:16 +02:00
committed by Piotr Esden-Tempski
parent 2a588f11aa
commit e1ebcc9da8
15 changed files with 526 additions and 218 deletions
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126
lib/cm3/systick.c
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@@ -18,23 +18,23 @@
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/** @defgroup CM3_systick_file SysTick
@ingroup CM3_files
@brief <b>libopencm3 Cortex System Tick Timer</b>
@version 1.0.0
@author @htmlonly &copy; @endhtmlonly 2010 Thomas Otto <tommi@viadmin.org>
@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
*
* @ingroup CM3_files
*
* @brief <b>libopencm3 Cortex System Tick Timer</b>
*
* @version 1.0.0
*
* @author @htmlonly &copy; @endhtmlonly 2010 Thomas Otto <tommi@viadmin.org>
*
* @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
*/
/**@{*/
@@ -42,121 +42,117 @@ LGPL License Terms @ref lgpl_license
/*---------------------------------------------------------------------------*/
/** @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 uint32_t. 24 bit reload value.
*/
*
* The counter is set to the reload value when the counter starts and after it
* reaches zero.
*
* @param[in] value uint32_t. 24 bit reload value.
*/
void systick_set_reload(uint32_t value)
{
STK_LOAD = (value & 0x00FFFFFF);
STK_RVR = (value & STK_RVR_RELOAD);
}
/*---------------------------------------------------------------------------*/
/** @brief SysTick Read the Automatic Reload Value.
@returns 24 bit reload value as uint32_t.
*/
*
* @returns 24 bit reload value as uint32_t.
*/
uint32_t systick_get_reload(void)
{
return STK_LOAD & 0x00FFFFFF;
return STK_RVR & STK_RVR_RELOAD;
}
/*---------------------------------------------------------------------------*/
/** @brief Get the current SysTick counter value.
@returns 24 bit current value as uint32_t.
*/
*
* @returns 24 bit current value as uint32_t.
*/
uint32_t systick_get_value(void)
{
return STK_VAL & 0x00FFFFFF;
return STK_CVR & STK_CVR_CURRENT;
}
/*---------------------------------------------------------------------------*/
/** @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 uint8_t. Clock source from @ref systick_clksource.
*/
*
* The clock source can be either the AHB clock or the same clock divided by 8.
*
* @param[in] clocksource uint8_t. Clock source from @ref systick_clksource.
*/
void systick_set_clocksource(uint8_t clocksource)
{
if (clocksource < 2) {
STK_CTRL |= (clocksource << STK_CTRL_CLKSOURCE_LSB);
STK_CSR |= clocksource;
}
}
/*---------------------------------------------------------------------------*/
/** @brief Enable SysTick Interrupt.
*/
*
*/
void systick_interrupt_enable(void)
{
STK_CTRL |= STK_CTRL_TICKINT;
STK_CSR |= STK_CSR_TICKINT;
}
/*---------------------------------------------------------------------------*/
/** @brief Disable SysTick Interrupt.
*/
*
*/
void systick_interrupt_disable(void)
{
STK_CTRL &= ~STK_CTRL_TICKINT;
STK_CSR &= ~STK_CSR_TICKINT;
}
/*---------------------------------------------------------------------------*/
/** @brief Enable SysTick Counter.
*/
*
*/
void systick_counter_enable(void)
{
STK_CTRL |= STK_CTRL_ENABLE;
STK_CSR |= STK_CSR_ENABLE;
}
/*---------------------------------------------------------------------------*/
/** @brief Disable SysTick Counter.
*/
*
*/
void systick_counter_disable(void)
{
STK_CTRL &= ~STK_CTRL_ENABLE;
STK_CSR &= ~STK_CSR_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.
*/
*
* The count flag is set when the timer count becomes zero, and is cleared when
* the flag is read.
*
* @returns Boolean if flag set.
*/
uint8_t systick_get_countflag(void)
{
if (STK_CTRL & STK_CTRL_COUNTFLAG) {
return 1;
} else {
return 0;
}
return (STK_CSR & STK_CSR_COUNTFLAG) ? 1 : 0;
}
/*---------------------------------------------------------------------------*/
/** @brief SysTick Get Calibration Value
@returns Current calibration value
*/
*
* @returns Current calibration value
*/
uint32_t systick_get_calib(void)
{
return STK_CALIB & 0x00FFFFFF;
return STK_CALIB & STK_CALIB_TENMS;
}
/**@}*/