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esp_eth: Recover the w5500 driver from missed io interrupt

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If the GPIO interrupt is re-asserted too quickly it could be missed. If this happens the driver goes silent and never receives any data. Recover by periodic checks of the IO signal level
This commit is contained in:
David Cermak 2021-04-09 20:36:01 +02:00 committed by bot
parent 557b1e9fe0
commit 0cd021adb1
1 changed files with 6 additions and 2 deletions
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8
components/esp_eth/src/esp_eth_mac_w5500.c
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@ -314,8 +314,12 @@ static void emac_w5500_task(void *arg)
uint8_t *buffer = NULL;
uint32_t length = 0;
while (1) {
// block indefinitely until some task notifies me
ulTaskNotifyTake(pdTRUE, portMAX_DELAY);
// check if the task receives any notification
if (ulTaskNotifyTake(pdTRUE, pdMS_TO_TICKS(1000)) == 0 && // if no notification ...
gpio_get_level(emac->int_gpio_num) != 0) { // ...and no interrupt asserted
continue; // -> just continue to check again
}
/* read interrupt status */
w5500_read(emac, W5500_REG_SOCK_IR(0), &status, sizeof(status));
/* packet received */