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Merge pull request #9341 from SeppoTakalo/flush_esp 

Flush ESP8266 serial input buffers after HW reset
pull/9369/head
Martin Kojtal 2019-01-14 09:04:17 +00:00 committed by GitHub
parent c5014f4e19 7db2292417
commit 23d75653ec
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 24 additions and 5 deletions
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7
components/wifi/esp8266-driver/ESP8266/ESP8266.cpp
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@ -1114,6 +1114,13 @@ int8_t ESP8266::default_wifi_mode()
return 0;
}
void ESP8266::flush()
{
_smutex.lock();
_parser.flush();
_smutex.unlock();
}
bool ESP8266::set_default_wifi_mode(const int8_t mode)
{
_smutex.lock();

9
components/wifi/esp8266-driver/ESP8266/ESP8266.h
View File

@ -367,6 +367,15 @@ public:
*/
void bg_process_oob(uint32_t timeout, bool all);
/**
* Flush the serial port input buffers.
*
* If you do HW reset for ESP module, you should
* flush the input buffers from existing responses
* from the device.
*/
void flush();
static const int8_t WIFIMODE_STATION = 1;
static const int8_t WIFIMODE_SOFTAP = 2;
static const int8_t WIFIMODE_STATION_SOFTAP = 3;

3
components/wifi/esp8266-driver/ESP8266Interface.cpp
View File

@ -368,11 +368,14 @@ nsapi_error_t ESP8266Interface::_init(void)
void ESP8266Interface::_hw_reset()
{
if (_rst_pin.is_connected()) {
_rst_pin.rst_assert();
// If you happen to use Pin7 CH_EN as reset pin, not needed otherwise
// https://www.espressif.com/sites/default/files/documentation/esp8266_hardware_design_guidelines_en.pdf
wait_ms(2); // Documentation says 200 us should have been enough, but experimentation shows that 1ms was not enough
_esp.flush();
_rst_pin.rst_deassert();
}
}
struct esp8266_socket {