138 lines
2.9 KiB
C
Executable File
138 lines
2.9 KiB
C
Executable File
/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2021/04/22 Juice Add UART0 support for JuiceVm.
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*/
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#include <rthw.h>
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#include <rtthread.h>
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#include <rtdevice.h>
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#include "board.h"
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#include "drv_uart.h"
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#include "rv_mtvec_map.h"
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struct rt_serial_device *serial;
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char *device_name = "uart0";
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static rt_err_t uart_configure(struct rt_serial_device *serial, struct serial_configure *cfg);
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static rt_err_t uart_control(struct rt_serial_device *serial, int cmd, void *arg);
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static int uart_putc(struct rt_serial_device *serial, char c);
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static int uart_getc(struct rt_serial_device *serial);
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static rt_ssize_t uart_dma_transmit(struct rt_serial_device *serial, rt_uint8_t *buf, rt_size_t size, int direction);
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void UART0_DriverIRQHandler(void);
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const struct rt_uart_ops _uart_ops =
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{
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uart_configure,
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uart_control,
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uart_putc,
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uart_getc,
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uart_dma_transmit
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};
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static void uart_isr(struct rt_serial_device *serial);
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#if defined(BSP_USING_UART0)
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struct rt_serial_device serial0;
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void UART0_DriverIRQHandler(void)
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{
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uart_isr(&serial0);
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}
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#endif
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/*
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* UART Initiation
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*/
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int rt_hw_uart_init(void)
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{
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int i;
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struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
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serial = &serial0;
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serial->ops = &_uart_ops;
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serial->config = config;
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/* register UART device */
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rt_hw_serial_register(serial,
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device_name,
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RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
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(void *)0);
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return 0;
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}
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/*
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* UART interface
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*/
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static rt_err_t uart_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
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{
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RT_ASSERT(serial != RT_NULL);
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RT_ASSERT(cfg != RT_NULL);
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return RT_EOK;
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}
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static rt_err_t uart_control(struct rt_serial_device *serial, int cmd, void *arg)
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{
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RT_ASSERT(serial != RT_NULL);
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return RT_EOK;
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}
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static int uart_putc(struct rt_serial_device *serial, char c)
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{
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RT_ASSERT(serial != RT_NULL);
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*((char *)(pdev_uart0_write_addr)) = c;
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return (1);
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}
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static int uart_getc(struct rt_serial_device *serial)
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{
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int ch;
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RT_ASSERT(serial != RT_NULL);
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ch = -1;
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if (*(char *)(pdev_uart0_state_addr) == pdev_uart0_readbusy_state)
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{
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ch = *(char *)(pdev_uart0_read_addr);
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*(char *)(pdev_uart0_state_addr) = pdev_uart0_free_state;
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}
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return ch;
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}
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static rt_ssize_t uart_dma_transmit(struct rt_serial_device *serial, rt_uint8_t *buf, rt_size_t size, int direction)
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{
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return (0);
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}
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/* UART ISR */
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/**
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* Uart common interrupt process. This need add to uart ISR.
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*
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* @param serial serial device
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*/
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static void uart_isr(struct rt_serial_device *serial)
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{
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RT_ASSERT(serial != RT_NULL);
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if (*(char *)(pdev_uart0_state_addr) == pdev_uart0_readbusy_state)
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{
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rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND);
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}
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}
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