esp8266/uart: Comment out old, unused rx buffering code.
This was originally used for non-event based REPL processing. Then it
was unused when event-based processing was activated. But now that event
based is disabled, and non-event based is back, there has been new ring
buffer code to process the chars.
diff --git a/esp8266/uart.c b/esp8266/uart.c
index bfc380a..ed5e1d9 100644
--- a/esp8266/uart.c
+++ b/esp8266/uart.c
@@ -19,18 +19,22 @@
#include "user_interface.h"
#include "esp_mphal.h"
-#define RX_BUF_SIZE (256)
#define UART_REPL UART0
// UartDev is defined and initialized in rom code.
extern UartDevice UartDev;
+/* unused
// circular buffer for RX buffering
+#define RX_BUF_SIZE (256)
static uint16_t rx_buf_in;
static uint16_t rx_buf_out;
static uint8_t rx_buf[RX_BUF_SIZE];
+*/
+#if MICROPY_REPL_EVENT_DRIVEN
static os_event_t uart_evt_queue[16];
+#endif
static void uart0_rx_intr_handler(void *para);
@@ -83,9 +87,11 @@
// enable rx_interrupt
SET_PERI_REG_MASK(UART_INT_ENA(uart_no), UART_RXFIFO_FULL_INT_ENA);
+ /* unused
// init RX buffer
rx_buf_in = 0;
rx_buf_out = 0;
+ */
}
/******************************************************************************
@@ -184,6 +190,7 @@
}
}
+/* unused
int uart0_rx(void) {
if (rx_buf_out != rx_buf_in) {
int chr = rx_buf[rx_buf_out];
@@ -193,6 +200,7 @@
return -1;
}
}
+*/
int uart_rx_one_char(uint8 uart_no) {
if (READ_PERI_REG(UART_STATUS(uart_no)) & (UART_RXFIFO_CNT << UART_RXFIFO_CNT_S)) {