1 files changed, 106 insertions, 0 deletions
diff --git a/FreeRTOS/Demo/RISC-V_RV32_SiFive_HiFive1-RevB_FreedomStudio/freedom-metal/metal/uart.h b/FreeRTOS/Demo/RISC-V_RV32_SiFive_HiFive1-RevB_FreedomStudio/freedom-metal/metal/uart.h
new file mode 100644
index 000000000..e9e4d0436
--- /dev/null
+++ b/FreeRTOS/Demo/RISC-V_RV32_SiFive_HiFive1-RevB_FreedomStudio/freedom-metal/metal/uart.h
@@ -0,0 +1,106 @@
+/* Copyright 2018 SiFive, Inc */
+/* SPDX-License-Identifier: Apache-2.0 */
+
+#ifndef METAL__UART_H
+#define METAL__UART_H
+
+/*!
+ * @file uart.h
+ * @brief API for UART serial ports
+ */
+
+#include <metal/interrupt.h>
+
+struct metal_uart;
+#undef getc
+#undef putc
+struct metal_uart_vtable {
+    void (*init)(struct metal_uart *uart, int baud_rate);
+    int (*putc)(struct metal_uart *uart, int c);
+    int (*txready)(struct metal_uart *uart);
+    int (*getc)(struct metal_uart *uart, int *c);
+    int (*get_baud_rate)(struct metal_uart *uart);
+    int (*set_baud_rate)(struct metal_uart *uart, int baud_rate);
+    struct metal_interrupt* (*controller_interrupt)(struct metal_uart *uart);
+    int (*get_interrupt_id)(struct metal_uart *uart);
+};
+
+/*!
+ * @brief Handle for a UART serial device
+ */
+struct metal_uart {
+    const struct metal_uart_vtable *vtable;
+};
+
+/*!
+ * @brief Initialize UART device
+ 
+ * Initialize the UART device described by the UART handle. This function must be called before any
+ * other method on the UART can be invoked. It is invalid to initialize a UART more than once.
+ *
+ * @param uart The UART device handle
+ * @param baud_rate the baud rate to set the UART to
+ */
+__inline__ void metal_uart_init(struct metal_uart *uart, int baud_rate) { uart->vtable->init(uart, baud_rate); }
+
+/*!
+ * @brief Output a character over the UART
+ * @param uart The UART device handle
+ * @param c The character to send over the UART
+ * @return 0 upon success
+ */
+__inline__ int metal_uart_putc(struct metal_uart *uart, int c) { return uart->vtable->putc(uart, c); }
+
+/*!
+ * @brief Test, determine if tx output is blocked(full/busy)
+ * @param uart The UART device handle
+ * @return 0 not blocked
+ */
+__inline__ int metal_uart_txready(struct metal_uart *uart) { return uart->vtable->txready(uart); }
+
+/*!
+ * @brief Read a character sent over the UART
+ * @param uart The UART device handle
+ * @param c The varible to hold the read character
+ * @return 0 upon success
+ *
+ * If "c == -1" no char was ready.
+ * If "c != -1" then C == byte value (0x00 to 0xff)
+ */
+__inline__ int metal_uart_getc(struct metal_uart *uart, int *c) { return uart->vtable->getc(uart, c); }
+
+/*!
+ * @brief Get the baud rate of the UART peripheral
+ * @param uart The UART device handle
+ * @return The current baud rate of the UART
+ */
+__inline__ int metal_uart_get_baud_rate(struct metal_uart *uart) { return uart->vtable->get_baud_rate(uart); }
+
+/*!
+ * @brief Set the baud rate of the UART peripheral
+ * @param uart The UART device handle
+ * @param baud_rate The baud rate to configure
+ * @return the new baud rate of the UART
+ */
+__inline__ int metal_uart_set_baud_rate(struct metal_uart *uart, int baud_rate) { return uart->vtable->set_baud_rate(uart, baud_rate); }
+
+/*!
+ * @brief Get the interrupt controller of the UART peripheral
+ *
+ * Get the interrupt controller for the UART peripheral. The interrupt
+ * controller must be initialized before any interrupts can be registered
+ * or enabled with it.
+ *
+ * @param uart The UART device handle
+ * @return The handle for the UART interrupt controller
+ */
+__inline__ struct metal_interrupt* metal_uart_interrupt_controller(struct metal_uart *uart) { return uart->vtable->controller_interrupt(uart); }
+
+/*!
+ * @brief Get the interrupt ID of the UART controller
+ * @param uart The UART device handle
+ * @return The UART interrupt id
+ */
+__inline__ int metal_uart_get_interrupt_id(struct metal_uart *uart) { return uart->vtable->get_interrupt_id(uart); }
+
+#endif