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esp8266: Reset "virtual RTC" on power on.

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Initialize RTC period coefficients, etc. if RTC RAM doesn't contain valid
values. time.time() then will return number of seconds since power-on, unless
set to different timebase.

This reuses MEM_MAGIC for the purpose beyond its initial purpose (but the whole
modpybrtc.c need to be eventually reworked completely anyway).
This commit is contained in:
Paul Sokolovsky 2016-02-08 21:43:37 +02:00
parent 57884996b9
commit a4c8ef9d16
3 changed files with 16 additions and 0 deletions
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1
esp8266/esp_mphal.c
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@ -37,6 +37,7 @@ extern void ets_delay_us();
void mp_hal_init(void) {
ets_wdt_disable(); // it's a pain while developing
mp_hal_rtc_init();
uart_init(UART_BIT_RATE_115200, UART_BIT_RATE_115200);
}

1
esp8266/esp_mphal.h
View File

@ -31,6 +31,7 @@
void ets_isr_mask(unsigned);
void mp_hal_init(void);
void mp_hal_rtc_init(void);
void mp_hal_feed_watchdog(void);
uint32_t mp_hal_ticks_us(void);

14
esp8266/modpybrtc.c
View File

@ -49,6 +49,20 @@ typedef struct _pyb_rtc_obj_t {
// singleton RTC object
STATIC const pyb_rtc_obj_t pyb_rtc_obj = {{&pyb_rtc_type}};
void mp_hal_rtc_init(void) {
uint32_t magic;
system_rtc_mem_read(MEM_USER_MAGIC_ADDR, &magic, sizeof(magic));
if (magic != MEM_MAGIC) {
magic = MEM_MAGIC;
system_rtc_mem_write(MEM_USER_MAGIC_ADDR, &magic, sizeof(magic));
uint32_t cal = system_rtc_clock_cali_proc();
int64_t delta = 0;
system_rtc_mem_write(MEM_CAL_ADDR, &cal, sizeof(cal));
system_rtc_mem_write(MEM_DELTA_ADDR, &delta, sizeof(delta));
}
}
STATIC mp_obj_t pyb_rtc_make_new(const mp_obj_type_t *type, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
// check arguments
mp_arg_check_num(n_args, n_kw, 0, 0, false);