/**
* \brief Test power scaling switch.
*
* \param test Current test case.
*/
static void run_ps_test(const struct test_case *test)
{
uint32_t timeout = sysclk_get_cpu_hz() / 1000 * 10; /* Wait 10ms */
bool b_psok;
b_psok = bpm_power_scaling_cpu_failsafe(BPM, BPM_PMCON_PS(BPM_PS_1),
timeout);
test_assert_true(test, b_psok, "Switch to PS1: PSOK not ready");
wait_test_assert_idle();
b_psok = bpm_power_scaling_cpu_failsafe(BPM, BPM_PMCON_PS(BPM_PS_0),
timeout);
test_assert_true(test, b_psok, "Switch to PS0: PSOK not ready");
wait_test_assert_idle();
}
/**
* \brief Switch into selected Power Scaling.
* \param power_scaling selected Power Scaling.
*/
void app_switch_power_scaling(power_scaling_t power_scaling)
{
if (power_scaling == POWER_SCALING_PS1){
bpm_configure_power_scaling(BPM,
BPM_PMCON_PS(BPM_PS_1),
true);
} else if (power_scaling == POWER_SCALING_PS2){
bpm_configure_power_scaling(BPM,
BPM_PMCON_PS(BPM_PS_2),
true);
} else {
bpm_configure_power_scaling(BPM,
BPM_PMCON_PS(BPM_PS_0),
true);
}
while((bpm_get_status(BPM) & BPM_SR_PSOK) == 0);
}
void bpm_power_scaling_cpu(Bpm *bpm, uint32_t ps_value)
{
uint32_t pmcon = 0;
/* Read last PM_CON value */
pmcon = bpm->BPM_PMCON;
/* Clear last PS Value */
pmcon &= ~BPM_PMCON_PS_Msk;
/* Write new PS Value */
pmcon |= BPM_PMCON_PS(ps_value);
/* PSCM: without CPU halt */
pmcon |= BPM_PMCON_PSCM;
/* Power Scaling Change Request */
pmcon |= BPM_PMCON_PSCREQ;
/* Unlock PMCON register */
BPM_UNLOCK(PMCON);
/* Write back PM_CON value */
bpm->BPM_PMCON = pmcon;
}
bool bpm_power_scaling_cpu_failsafe(Bpm *bpm, uint32_t ps_value,
uint32_t timeout)
{
uint32_t pmcon = 0;
/* Read last PM_CON value */
pmcon = bpm->BPM_PMCON;
/* Clear last PS Value & Write new one */
pmcon &= ~BPM_PMCON_PS_Msk;
pmcon |= BPM_PMCON_PS(ps_value);
/* Set PSCM Value: PS change no halt */
pmcon |= BPM_PMCON_PSCM;
/* Power Scaling Change Request */
pmcon |= BPM_PMCON_PSCREQ;
/* Execute power scaling no halt in RAM */
irqflags_t flags;
bool b_psok;
uint32_t ctrl, load, val;
/* Avoid interrupt while flash halt */
flags = cpu_irq_save();
/* Save SysTick */
val = SysTick->VAL;
ctrl = SysTick->CTRL;
load = SysTick->LOAD;
/* Setup SysTick & start counting */
SysTick->LOAD = timeout;
SysTick->CTRL = SysTick_CTRL_CLKSOURCE_Msk | SysTick_CTRL_ENABLE_Msk;
b_psok = bpm_ps_no_halt_exec(bpm, pmcon);
/* Restore SysTick */
SysTick->CTRL = 0;
SysTick->LOAD = load;
SysTick->VAL = val;
SysTick->CTRL = ctrl;
cpu_irq_restore(flags);
return b_psok;
}