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driver(UART): fix uart driver missing txfifo reset issue.

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closes https://github.com/espressif/esp-idf/issues/4908
This commit is contained in:
houwenxiang 2020-03-16 20:37:12 +08:00 committed by kooho
parent 6c0a1aab50
commit 886745326e
1 changed files with 3 additions and 0 deletions
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3
components/driver/uart.c
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@ -631,7 +631,10 @@ esp_err_t uart_param_config(uart_port_t uart_num, const uart_config_t *uart_conf
uart_hal_set_tx_idle_num(&(uart_context[uart_num].hal), UART_TX_IDLE_NUM_DEFAULT);
uart_hal_set_hw_flow_ctrl(&(uart_context[uart_num].hal), uart_config->flow_ctrl, uart_config->rx_flow_ctrl_thresh);
UART_EXIT_CRITICAL(&(uart_context[uart_num].spinlock));
// The module reset do not reset TX and RX memory.
// reset FIFO to avoid garbage data remained in the FIFO.
uart_hal_rxfifo_rst(&(uart_context[uart_num].hal));
uart_hal_txfifo_rst(&(uart_context[uart_num].hal));
return ESP_OK;
}