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.
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@ -19,18 +19,22 @@
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#include "user_interface.h"
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#include "esp_mphal.h"
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#define RX_BUF_SIZE (256)
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#define UART_REPL UART0
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// UartDev is defined and initialized in rom code.
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extern UartDevice UartDev;
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/* unused
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// circular buffer for RX buffering
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#define RX_BUF_SIZE (256)
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static uint16_t rx_buf_in;
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static uint16_t rx_buf_out;
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static uint8_t rx_buf[RX_BUF_SIZE];
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*/
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#if MICROPY_REPL_EVENT_DRIVEN
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static os_event_t uart_evt_queue[16];
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#endif
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static void uart0_rx_intr_handler(void *para);
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@ -83,9 +87,11 @@ static void ICACHE_FLASH_ATTR uart_config(uint8 uart_no) {
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// enable rx_interrupt
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SET_PERI_REG_MASK(UART_INT_ENA(uart_no), UART_RXFIFO_FULL_INT_ENA);
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/* unused
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// init RX buffer
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rx_buf_in = 0;
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rx_buf_out = 0;
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*/
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}
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/******************************************************************************
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@ -184,6 +190,7 @@ static void uart0_rx_intr_handler(void *para) {
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}
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}
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/* unused
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int uart0_rx(void) {
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if (rx_buf_out != rx_buf_in) {
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int chr = rx_buf[rx_buf_out];
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@ -193,6 +200,7 @@ int uart0_rx(void) {
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return -1;
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}
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}
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*/
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int uart_rx_one_char(uint8 uart_no) {
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if (READ_PERI_REG(UART_STATUS(uart_no)) & (UART_RXFIFO_CNT << UART_RXFIFO_CNT_S)) {
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