Mirrors/esp-idf
1
0
Fork 0
mirror of https://github.com/espressif/esp-idf.git synced 2026-08-18 06:35:35 +03:00
Code Issues Packages Projects Releases Wiki Activity

fix(uart): tx write bytes fails to use non-default tx fifo empty threshold

Browse Source 
Users may see tx write bytes fails to feed data into tx fifo in time
even if the tx fifo empty threshold has been set to a large value.
This commit is contained in:
Song Ruo Jing
2026-02-11 21:07:16 +08:00
parent 88aeae0f63
commit b1bb83df2b
2 changed files with 11 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
components/esp_driver_uart/src/uart.c
View File

@@ -686,11 +686,14 @@ esp_err_t uart_disable_tx_intr(uart_port_t uart_num)
esp_err_t uart_enable_tx_intr(uart_port_t uart_num, int enable, int thresh)
{
(void)enable;
ESP_RETURN_ON_FALSE((uart_num < UART_NUM_MAX), ESP_FAIL, UART_TAG, "uart_num error");
ESP_RETURN_ON_FALSE((thresh < UART_HW_FIFO_LEN(uart_num)), ESP_FAIL, UART_TAG, "empty intr threshold error");
uart_hal_clr_intsts_mask(&(uart_context[uart_num].hal), UART_INTR_TXFIFO_EMPTY);
UART_ENTER_CRITICAL(&(uart_context[uart_num].spinlock));
uart_hal_set_txfifo_empty_thr(&(uart_context[uart_num].hal), thresh);
if (thresh != -1) {
uart_hal_set_txfifo_empty_thr(&(uart_context[uart_num].hal), thresh);
}
uart_hal_ena_intr_mask(&(uart_context[uart_num].hal), UART_INTR_TXFIFO_EMPTY);
UART_EXIT_CRITICAL(&(uart_context[uart_num].spinlock));
return ESP_OK;
@@ -1577,7 +1580,7 @@ static int uart_tx_all(uart_port_t uart_num, const char *src, size_t size, bool
xRingbufferSend(p_uart_obj[uart_num]->tx_ring_buf, (void *)(src + offset), send_size, portMAX_DELAY);
size -= send_size;
offset += send_size;
uart_enable_tx_intr(uart_num, 1, UART_THRESHOLD_NUM(uart_num, UART_EMPTY_THRESH_DEFAULT));
uart_enable_tx_intr(uart_num, 1, -1);
}
}
} else {
@@ -1587,7 +1590,7 @@ static int uart_tx_all(uart_port_t uart_num, const char *src, size_t size, bool
uint32_t sent = uart_enable_tx_write_fifo(uart_num, (const uint8_t *) src, size);
if (sent < size) {
p_uart_obj[uart_num]->tx_waiting_fifo = true;
uart_enable_tx_intr(uart_num, 1, UART_THRESHOLD_NUM(uart_num, UART_EMPTY_THRESH_DEFAULT));
uart_enable_tx_intr(uart_num, 1, -1);
}
size -= sent;
src += sent;