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Honour values of configCPU_CLOCK_HZ & configTICK_RATE_HZ for tick rate

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Fixes #147

* Can vary tick rate from 100Hz via configTICK_RATE_HZ. Note that the
  SDK binary libraries are hard-coded to assume the tick rate is 100Hz,
  so changing the tick rate may have unexpected consequences for lower
  layer WiFi behaviour (such as certain kinds of timeouts happening
  faster/slower.)

* Setting configCPU_CLOCK_HZ to 160MHz means ESP will set 160MHz during
  initialisation. Only 80MHz and 160MHz are supported.

* Timing of tasks is no longer affected by current CPU freq (whether set
  via configCPU_CLOCK_HZ or via sdk_system_update_cpu_freq().)
  Previously doubling the CPU frequency would double the tick rate.
This commit is contained in:
Angus Gratton 2016-06-30 09:22:17 +10:00
parent 701a4c4284
commit 678b59babf
5 changed files with 19 additions and 2 deletions
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examples/blink/blink.c
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@ -2,6 +2,7 @@
*
* This sample code is in the public domain.
*/
#include <stdlib.h>
#include "espressif/esp_common.h"
#include "esp/uart.h"
#include "FreeRTOS.h"