7 Commity (2484e00a948c475e9dba3b0b10dc220679458762)

Autor	SHA1	Wiadomość	Data
morris	d94432fea8	systimer: refactor hal to accomodate more xtal choices	2022-07-25 16:08:52 +08:00
Ivan Grokhotkov	5b54ae76d4	esp_timer, hal: add support for non-integer systimer frequency ... When ESP32-C2 is paired with a 26 MHz XTAL, the systimer tick frequency becomes equal to 26 / 2.5 = 10.4 MHz. Previously we always assumed that systimer tick frequency is integer (and 1 MHz * power of two, above that!). This commit introduces a new LL macro, SYSTIMER_LL_TICKS_PER_US_DIV. It should be set in such a way that: 1. SYSTIMER_LL_TICKS_PER_US / SYSTIMER_LL_TICKS_PER_US_DIV equals the actual systimer tick frequency, 2. and SYSTIMER_LL_TICKS_PER_US is integer. For ESP32-C2 this means that SYSTIMER_LL_TICKS_PER_US = 52 and SYSTIMER_LL_TICKS_PER_US_DIV = 5. This introduced two possible issues: 1. Overflow when multiplying systimer counter by 5 - Should not be an issue, since systimer counter is 52-bit, so counter * 5 is no more than 55-bit. 2. The code needs to perform: - divide by 5: when converting from microseconds to ticks - divide by 52: when converting from ticks to microseconds The latter potentially introduces a performance issue for the esp_timer_get_time function.	2022-07-11 12:24:37 +08:00
wuzhenghui	17b3d139d5	hal: use systimer HAL IMPL in ESP32C2 ROM	2022-05-05 17:41:11 +08:00
Cao Sen Miao	09487761cf	ESP8684: add freertos, hal, esp_system support	2021-11-06 17:33:44 +08:00
morris	9afdf54748	hal: added HAL_ASSERT	2021-06-22 11:28:01 +08:00
morris	988c88a6b1	systimer: optimise esp_timer_get_time	2021-04-26 11:54:02 +08:00
morris	ec898b771e	systimer: strip hal driver	2021-04-22 21:08:39 +08:00