Fixes HardwareSerial::availableForWrite + setTxBufferSize (#6998)

SuGlider · web-flow · commit 054e6b3d56b5 · 2022-08-08T10:29:09.000-03:00
diff --git a/cores/esp32/esp32-hal-uart.c b/cores/esp32/esp32-hal-uart.c
@@ -238,6 +238,10 @@ uint32_t uartAvailableForWrite(uart_t* uart)
     }
     UART_MUTEX_LOCK();
     uint32_t available =  uart_ll_get_txfifo_len(UART_LL_GET_HW(uart->num));  
+    size_t txRingBufferAvailable = 0;
+    if (ESP_OK == uart_get_tx_buffer_free_size(uart->num, &txRingBufferAvailable)) {
+        available += txRingBufferAvailable; 
+    }
     UART_MUTEX_UNLOCK();
     return available;
 }

Original file line number	Diff line number	Diff line change
`@@ -238,6 +238,10 @@ uint32_t uartAvailableForWrite(uart_t* uart)`
`238`	`238`	`}`
`239`	`239`	`UART_MUTEX_LOCK();`
`240`	`240`	`uint32_t available = uart_ll_get_txfifo_len(UART_LL_GET_HW(uart->num));`
	`241`	`+ size_t txRingBufferAvailable = 0;`
	`242`	`+ if (ESP_OK == uart_get_tx_buffer_free_size(uart->num, &txRingBufferAvailable)) {`
	`243`	`+ available += txRingBufferAvailable;`
	`244`	`+ }`
`241`	`245`	`UART_MUTEX_UNLOCK();`
`242`	`246`	`return available;`
`243`	`247`	`}`