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Manipulate OSC modules using the AUX controller

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This commit is contained in:
George Oikonomou 2016-04-19 22:18:23 +01:00 committed by George Oikonomou
parent 698ce3a865
commit 812f1ada31
1 changed files with 36 additions and 50 deletions
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86
cpu/cc26xx-cc13xx/dev/oscillators.c
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@ -37,44 +37,18 @@
*/
/*---------------------------------------------------------------------------*/
#include "ti-lib.h"
#include "aux-ctrl.h"
#include <stdint.h>
/*---------------------------------------------------------------------------*/
static uint32_t
osc_interface_en(void)
{
uint32_t smph_clk_state;
/* Enable OSC DIG interface to change clock sources */
ti_lib_osc_interface_enable();
/* Save the state of the SMPH clock within AUX */
smph_clk_state = ti_lib_aux_wuc_clock_status(AUX_WUC_SMPH_CLOCK);
/* Make sure the SMPH clock within AUX is enabled */
ti_lib_aux_wuc_clock_enable(AUX_WUC_SMPH_CLOCK);
while(ti_lib_aux_wuc_clock_status(AUX_WUC_SMPH_CLOCK) != AUX_WUC_CLOCK_READY);
return smph_clk_state;
}
/*---------------------------------------------------------------------------*/
static void
osc_interface_dis(uint32_t smph_clk_state)
{
/* If the SMPH clock was off, turn it back off */
if(smph_clk_state == AUX_WUC_CLOCK_OFF) {
ti_lib_aux_wuc_clock_disable(AUX_WUC_SMPH_CLOCK);
}
/* Disable OSC DIG interface */
ti_lib_osc_interface_disable();
}
/*---------------------------------------------------------------------------*/
void
oscillators_select_lf_xosc(void)
{
/* Enable the Osc interface and remember the state of the SMPH clock */
uint32_t smph_clk_state = osc_interface_en();
/* Request AUX access, with OSCCTRL and SMPH clocks */
aux_consumer_module_t osc = {
.clocks = AUX_WUC_OSCCTRL_CLOCK | AUX_WUC_SMPH_CLOCK
};
aux_ctrl_register_consumer(&osc);
/* Switch LF clock source to the LF XOSC if required */
if(ti_lib_osc_clock_source_get(OSC_SRC_CLK_LF) != OSC_XOSC_LF) {
@ -91,15 +65,18 @@ oscillators_select_lf_xosc(void)
0x3);
}
/* Restore the SMPH clock and disable the OSC interface */
osc_interface_dis(smph_clk_state);
/* Release the OSC AUX consumer */
aux_ctrl_unregister_consumer(&osc);
}
/*---------------------------------------------------------------------------*/
void
oscillators_select_lf_rcosc(void)
{
/* Enable the Osc interface and remember the state of the SMPH clock */
uint32_t smph_clk_state = osc_interface_en();
/* Request AUX access, with OSCCTRL and SMPH clocks */
aux_consumer_module_t osc = {
.clocks = AUX_WUC_OSCCTRL_CLOCK | AUX_WUC_SMPH_CLOCK
};
aux_ctrl_register_consumer(&osc);
/* Switch LF clock source to the LF XOSC if required */
if(ti_lib_osc_clock_source_get(OSC_SRC_CLK_LF) != OSC_RCOSC_LF) {
@ -109,15 +86,18 @@ oscillators_select_lf_rcosc(void)
while(ti_lib_osc_clock_source_get(OSC_SRC_CLK_LF) != OSC_RCOSC_LF);
}
/* Restore the SMPH clock and disable the OSC interface */
osc_interface_dis(smph_clk_state);
/* Release the OSC AUX consumer */
aux_ctrl_unregister_consumer(&osc);
}
/*---------------------------------------------------------------------------*/
void
oscillators_request_hf_xosc(void)
{
/* Enable the Osc interface and remember the state of the SMPH clock */
uint32_t smph_clk_state = osc_interface_en();
/* Request AUX access, with OSCCTRL and SMPH clocks */
aux_consumer_module_t osc = {
.clocks = AUX_WUC_OSCCTRL_CLOCK | AUX_WUC_SMPH_CLOCK
};
aux_ctrl_register_consumer(&osc);
if(ti_lib_osc_clock_source_get(OSC_SRC_CLK_HF) != OSC_XOSC_HF) {
/*
@ -128,30 +108,36 @@ oscillators_request_hf_xosc(void)
ti_lib_osc_clock_source_set(OSC_SRC_CLK_MF | OSC_SRC_CLK_HF, OSC_XOSC_HF);
}
/* Restore the SMPH clock and disable the OSC interface */
osc_interface_dis(smph_clk_state);
/* Release the OSC AUX consumer */
aux_ctrl_unregister_consumer(&osc);
}
/*---------------------------------------------------------------------------*/
void
oscillators_switch_to_hf_xosc(void)
{
/* Enable the Osc interface and remember the state of the SMPH clock */
uint32_t smph_clk_state = osc_interface_en();
/* Request AUX access, with OSCCTRL and SMPH clocks */
aux_consumer_module_t osc = {
.clocks = AUX_WUC_OSCCTRL_CLOCK | AUX_WUC_SMPH_CLOCK
};
aux_ctrl_register_consumer(&osc);
if(ti_lib_osc_clock_source_get(OSC_SRC_CLK_HF) != OSC_XOSC_HF) {
/* Switch the HF clock source (cc26xxware executes this from ROM) */
ti_lib_osc_hf_source_switch();
}
/* Restore the SMPH clock and disable the OSC interface */
osc_interface_dis(smph_clk_state);
/* Release the OSC AUX consumer */
aux_ctrl_unregister_consumer(&osc);
}
/*---------------------------------------------------------------------------*/
void
oscillators_switch_to_hf_rc(void)
{
/* Enable the Osc interface and remember the state of the SMPH clock */
uint32_t smph_clk_state = osc_interface_en();
/* Request AUX access, with OSCCTRL and SMPH clocks */
aux_consumer_module_t osc = {
.clocks = AUX_WUC_OSCCTRL_CLOCK | AUX_WUC_SMPH_CLOCK
};
aux_ctrl_register_consumer(&osc);
/* Set all clock sources to the HF RC Osc */
ti_lib_osc_clock_source_set(OSC_SRC_CLK_MF | OSC_SRC_CLK_HF, OSC_RCOSC_HF);
@ -162,8 +148,8 @@ oscillators_switch_to_hf_rc(void)
ti_lib_osc_hf_source_switch();
}
/* Restore the SMPH clock and disable the OSC interface */
osc_interface_dis(smph_clk_state);
/* Release the OSC AUX consumer */
aux_ctrl_unregister_consumer(&osc);
}
/*---------------------------------------------------------------------------*/
/** @} */