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stm32/rtc: Remove unused LSE detection code.

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This commit is contained in:
Damien George 2019-04-11 12:14:21 +10:00
parent 46e5d6b889
commit fc9f2ff0cd
1 changed files with 0 additions and 37 deletions
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37
ports/stm32/rtc.c
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@ -73,36 +73,6 @@ STATIC bool rtc_use_lse = false;
STATIC uint32_t rtc_startup_tick;
STATIC bool rtc_need_init_finalise = false;
// check if LSE exists
// not well tested, should probably be removed
STATIC bool lse_magic(void) {
#if 0
uint32_t mode_in = GPIOC->MODER & 0x3fffffff;
uint32_t mode_out = mode_in | 0x40000000;
GPIOC->MODER = mode_out;
GPIOC->OTYPER &= 0x7fff;
GPIOC->BSRRH = 0x8000;
GPIOC->OSPEEDR &= 0x3fffffff;
GPIOC->PUPDR &= 0x3fffffff;
int i = 0xff0;
__IO int d = 0;
uint32_t tc = 0;
__IO uint32_t j;
while (i) {
GPIOC->MODER = mode_out;
GPIOC->MODER = mode_in;
for (j = 0; j < d; j++) ;
i--;
if ((GPIOC->IDR & 0x8000) == 0) {
tc++;
}
}
return (tc < 0xff0)?true:false;
#else
return false;
#endif
}
void rtc_init_start(bool force_init) {
RTCHandle.Instance = RTC;
@ -152,13 +122,6 @@ void rtc_init_start(bool force_init) {
rtc_startup_tick = HAL_GetTick();
rtc_info = 0x3f000000 | (rtc_startup_tick & 0xffffff);
if (rtc_use_lse) {
if (lse_magic()) {
// don't even try LSE
rtc_use_lse = false;
rtc_info &= ~0x01000000;
}
}
PYB_RTC_MspInit_Kick(&RTCHandle, rtc_use_lse, MICROPY_HW_RTC_USE_BYPASS);
}