AI工具写的环形缓冲区

Src/uart_ring_buffer.c

@@ -0,0 +1,34 @@
+#include "uart_ring_buffer.h"
+
+static volatile uint8_t uart_rx_buffer[UART_RX_BUFFER_SIZE];
+static volatile uint16_t uart_rx_write = 0;
+static volatile uint16_t uart_rx_read = 0;
+
+void uart_ring_buffer_init(void) {
+    uart_rx_write = 0;
+    uart_rx_read = 0;
+}
+
+uint16_t uart_rx_available(void) {
+    return (uart_rx_write + UART_RX_BUFFER_SIZE - uart_rx_read) % UART_RX_BUFFER_SIZE;
+}
+
+int uart_rx_get(void) {
+    if (uart_rx_read == uart_rx_write) return -1; // 空
+    uint8_t data = uart_rx_buffer[uart_rx_read];
+    uart_rx_read = (uart_rx_read + 1) % UART_RX_BUFFER_SIZE;
+    return data;
+}
+
+void uart_rx_put(uint8_t data) {
+    uint16_t next = (uart_rx_write + 1) % UART_RX_BUFFER_SIZE;
+    if (next != uart_rx_read) { // 缓冲区未满
+        uart_rx_buffer[uart_rx_write] = data;
+        uart_rx_write = next;
+    }
+}
+
+void uart_rx_clear(void) {
+    uart_rx_write = 0;
+    uart_rx_read = 0;
+}