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May 24, 2016 09:18
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Make implementation of Arduino WiFi101 (v0.8.0) WiFiClient.write() method non blocking (but data-loss)
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// For file src/WiFiClient.cpp change ths method: | |
size_t WiFiClient::write(const uint8_t *buf, size_t size) | |
{ | |
sint16 err; | |
if (_socket < 0 || size == 0) { | |
setWriteError(); | |
return 0; | |
} | |
// Network led ON (rev A then rev B). | |
m2m_periph_gpio_set_val(M2M_PERIPH_GPIO16, 0); | |
m2m_periph_gpio_set_val(M2M_PERIPH_GPIO5, 0); | |
m2m_wifi_handle_events(NULL); | |
while ((err = send(_socket, (void *)buf, size, 0)) < 0) { | |
// Exit on fatal error, retry if buffer not ready. | |
if (err != SOCK_ERR_BUFFER_FULL) { | |
setWriteError(); | |
m2m_periph_gpio_set_val(M2M_PERIPH_GPIO16, 1); | |
m2m_periph_gpio_set_val(M2M_PERIPH_GPIO5, 1); | |
return 0; | |
} | |
m2m_wifi_handle_events(NULL); | |
} | |
// Network led OFF (rev A then rev B). | |
m2m_periph_gpio_set_val(M2M_PERIPH_GPIO16, 1); | |
m2m_periph_gpio_set_val(M2M_PERIPH_GPIO5, 1); | |
return size; | |
} | |
// into: | |
size_t WiFiClient::write(const uint8_t *buf, size_t size) | |
{ | |
sint16 err; | |
if (_socket < 0 || size == 0) { | |
setWriteError(); | |
return 0; | |
} | |
// Network led ON (rev A then rev B). | |
m2m_periph_gpio_set_val(M2M_PERIPH_GPIO16, 0); | |
m2m_periph_gpio_set_val(M2M_PERIPH_GPIO5, 0); | |
m2m_wifi_handle_events(NULL); | |
unsigned long t1 = millis(); | |
unsigned long t2 = t1; | |
while ((err = send(_socket, (void *)buf, size, 0)) < 0) { | |
t2 = millis(); | |
if ((t2-t1) > 3) { // sending has to be completed by 3 ms (can change this), otherwise exit | |
return 0; | |
} | |
// Exit on fatal error, retry if buffer not ready. | |
if (err != SOCK_ERR_BUFFER_FULL) { | |
setWriteError(); | |
m2m_periph_gpio_set_val(M2M_PERIPH_GPIO16, 1); | |
m2m_periph_gpio_set_val(M2M_PERIPH_GPIO5, 1); | |
return 0; | |
} | |
m2m_wifi_handle_events(NULL); | |
} | |
// Network led OFF (rev A then rev B). | |
m2m_periph_gpio_set_val(M2M_PERIPH_GPIO16, 1); | |
m2m_periph_gpio_set_val(M2M_PERIPH_GPIO5, 1); | |
return size; | |
} |
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