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25d04c4742
- Unecessary definitions are removed. - Since the 48-bit RTC hardware timer uses a RC oscillator as clock, it is pretty inaccurate and leads to a RTC time deviation of up to 3 seconds per minute. Therefore, a calibration during the boot time determines a correction factor for the 48-bit RTC hardware timer. Function _rtc_time_to_us uses now this correction factor and converts a raw 48-bit RTC time to a corrected time in microseconds. Thus, the 48-bit RTC timer becomes much more accurate, but it can't still reach the accuracy of the PLL driven 64-bit system timer. The Advantage of using RTC over 64-bit sydtem timer is that it also continues in deep sleep mode and after software reset. - If the 64-bit system timer is used to emulate the RTC timer, it uses the RTC hardware timer to continue its operation after software . |
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| .. | ||
| adc_ctrl.c | ||
| adc.c | ||
| can.c | ||
| cpuid.c | ||
| dac.c | ||
| flash.c | ||
| gpio.c | ||
| hwrng.c | ||
| i2c_hw.c | ||
| i2c_sw.c | ||
| Makefile | ||
| pm.c | ||
| pwm.c | ||
| rtc.c | ||
| spi.c | ||
| timer.c | ||
| uart.c | ||