esp8266/machine_uart: Add rxbuf keyword arg to UART constructor/init.

As per the machine.UART documentation, this is used to set the length of
the UART RX buffer.

1 files changed, 14 insertions, 1 deletions

diff --git a/ports/esp8266/uart.c b/ports/esp8266/uart.c
index 52707f981..cf9e8f61b 100644
--- a/ports/esp8266/uart.c
+++ b/ports/esp8266/uart.c
@@ -36,7 +36,7 @@ static os_event_t uart_evt_queue[16];
 
 // A small, static ring buffer for incoming chars
 // This will only be populated if the UART is not attached to dupterm
-static byte uart_ringbuf_array[16];
+uint8 uart_ringbuf_array[UART0_STATIC_RXBUF_LEN];
 static ringbuf_t uart_ringbuf = {uart_ringbuf_array, sizeof(uart_ringbuf_array), 0, 0};
 
 static void uart0_rx_intr_handler(void *para);
@@ -269,6 +269,19 @@ void ICACHE_FLASH_ATTR uart_setup(uint8 uart) {
     ETS_UART_INTR_ENABLE();
 }
 
+int ICACHE_FLASH_ATTR uart0_get_rxbuf_len(void) {
+    return uart_ringbuf.size;
+}
+
+void ICACHE_FLASH_ATTR uart0_set_rxbuf(uint8 *buf, int len) {
+    ETS_UART_INTR_DISABLE();
+    uart_ringbuf.buf = buf;
+    uart_ringbuf.size = len;
+    uart_ringbuf.iget = 0;
+    uart_ringbuf.iput = 0;
+    ETS_UART_INTR_ENABLE();
+}
+
 // Task-based UART interface
 
 #include "py/obj.h"