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cc2538: Allow for configuration of processor speed

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This commit is contained in:
Ulf Knoblich 2015-05-12 14:06:40 +02:00
parent 730bda2001
commit d8efa8428c
7 changed files with 107 additions and 38 deletions
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35
cpu/cc2538/dev/sys-ctrl.h
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@ -42,6 +42,8 @@
*/
#ifndef SYS_CTRL_H_
#define SYS_CTRL_H_
#include <stdint.h>
/*---------------------------------------------------------------------------*/
/** \name SysCtrl Constants, used by the SYS_DIV and IO_DIV bits of the
* SYS_CTRL_CLOCK_CTRL register
@ -242,6 +244,33 @@
#endif
/** @} */
/*---------------------------------------------------------------------------*/
/** \name System clock divisor selection
* @{
*/
#ifdef SYS_CTRL_CONF_SYS_DIV
#if SYS_CTRL_CONF_SYS_DIV & ~SYS_CTRL_CLOCK_CTRL_SYS_DIV
#error Invalid system clock divisor
#endif
#define SYS_CTRL_SYS_DIV SYS_CTRL_CONF_SYS_DIV
#else
#define SYS_CTRL_SYS_DIV SYS_CTRL_CLOCK_CTRL_SYS_DIV_16MHZ
#endif
#ifdef SYS_CTRL_CONF_IO_DIV
#if SYS_CTRL_CONF_IO_DIV & ~SYS_CTRL_CLOCK_CTRL_IO_DIV
#error Invalid I/O clock divisor
#endif
#define SYS_CTRL_IO_DIV SYS_CTRL_CONF_IO_DIV
#else
#define SYS_CTRL_IO_DIV SYS_CTRL_CLOCK_CTRL_IO_DIV_16MHZ
#endif
/* Returns actual system clock in Hz */
#define SYS_CTRL_SYS_CLOCK (SYS_CTRL_32MHZ >> SYS_CTRL_SYS_DIV)
/* Returns actual I/O clock in Hz */
#define SYS_CTRL_IO_CLOCK (SYS_CTRL_32MHZ >> (SYS_CTRL_IO_DIV >> 8))
/** @} */
/*---------------------------------------------------------------------------*/
/** \name SysCtrl functions
* @{
*/
@ -253,6 +282,12 @@ void sys_ctrl_init();
/** \brief Generates a warm reset through the SYS_CTRL_PWRDBG register */
void sys_ctrl_reset();
/** \brief Returns the actual system clock in Hz */
uint32_t sys_ctrl_get_sys_clock();
/** \brief Returns the actual io clock in Hz */
uint32_t sys_ctrl_get_io_clock();
/** @} */
#endif /* SYS_CTRL_H_ */