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esp32: disable DPORT access protection when doing esp_restart

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DPORT access protection can not work when the other CPU is stalled.
Writes to DPORT registers in esp_restart caused the program to hang due
to access protection, and the reset happened due to RTC_WDT, not SW_RST.
This change adds esp_dport_access_int_deinit function and calls it from
esp_restart once the other core is stalled.
This commit is contained in:
Ivan Grokhotkov
2017-06-14 18:00:26 +08:00
parent 75658ee29b
commit a72b1abc51
3 changed files with 14 additions and 1 deletions
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4
components/esp32/system_api.c
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@@ -246,11 +246,13 @@ void IRAM_ATTR esp_restart(void)
*/
void IRAM_ATTR esp_restart_noos()
{
const uint32_t core_id = xPortGetCoreID();
const uint32_t other_core_id = core_id == 0 ? 1 : 0;
esp_cpu_stall(other_core_id);
// other core is now stalled, can access DPORT registers directly
esp_dport_access_int_deinit();
// We need to disable TG0/TG1 watchdogs
// First enable RTC watchdog to be on the safe side
REG_WRITE(RTC_CNTL_WDTWPROTECT_REG, RTC_CNTL_WDT_WKEY_VALUE);