alex/esp-idf
1
0
Fork 0
mirror of https://github.com/espressif/esp-idf.git synced 2025-08-09 20:41:14 +00:00
Code Issues Packages Projects Releases Wiki Activity

wifi/bt coexistence: Fix disabled cache access race when writing to flash

Browse Source 
Moves the ets_timer_arm() / ets_timer_disarm() code paths to RAM

Overhead is 740 bytes of IRAM, 0 bytes DRAM

(For comparison: If all of esp_timer.c is moved to RAM, overhead is 1068 bytes IRAM and 480 bytes DRAM.)
This commit is contained in:
Angus Gratton
2017-10-16 19:16:20 +08:00
committed by Angus Gratton
parent b013f5d490
commit 094cf4d79d
4 changed files with 60 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

44
components/esp32/test/test_ets_timer.c
View File

@@ -7,6 +7,7 @@
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/semphr.h"
#include "esp_spi_flash.h"
TEST_CASE("ets_timer produces correct delay", "[ets_timer]")
{
@@ -192,3 +193,46 @@ TEST_CASE("multiple ETSTimers are ordered correctly", "[ets_timer]")
#undef N
}
/* WiFi/BT coexistence will sometimes arm/disarm
timers from an ISR where flash may be disabled. */
IRAM_ATTR TEST_CASE("ETSTimers arm & disarm run from IRAM", "[ets_timer]")
{
void timer_func(void* arg)
{
volatile bool *b = (volatile bool *)arg;
*b = true;
}
volatile bool flag = false;
ETSTimer timer1;
const int INTERVAL = 5;
ets_timer_setfn(&timer1, &timer_func, (void *)&flag);
/* arm a disabled timer, then disarm a live timer */
g_flash_guard_default_ops.start(); // Disables flash cache
ets_timer_arm(&timer1, INTERVAL, false);
// redundant call is deliberate (test code path if already armed)
ets_timer_arm(&timer1, INTERVAL, false);
ets_timer_disarm(&timer1);
g_flash_guard_default_ops.end(); // Re-enables flash cache
TEST_ASSERT_FALSE(flag); // didn't expire yet
/* do the same thing but wait for the timer to expire */
g_flash_guard_default_ops.start();
ets_timer_arm(&timer1, INTERVAL, false);
g_flash_guard_default_ops.end();
vTaskDelay(2 * INTERVAL / portTICK_PERIOD_MS);
TEST_ASSERT_TRUE(flag);
g_flash_guard_default_ops.start();
ets_timer_disarm(&timer1);
g_flash_guard_default_ops.end();
}