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/*
* Copyright (c) 2006-2020, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2020-08-06 whik first version
*/
#include <rthw.h>
#include <rtthread.h>
#include <rtdevice.h>
#include "drv_uart.h"
struct sf2_uart
{
mss_uart_instance_t *uart;
IRQn_Type irq;
};
struct sf2_uart uart0=
{
&g_mss_uart0,
UART0_IRQn,
};
struct rt_serial_device serial0;
void uart0_rx_handler(mss_uart_instance_t *this_uart)
{
/* enter interrupt */
rt_interrupt_enter();
rt_hw_serial_isr(&serial0, RT_SERIAL_EVENT_RX_IND);
/* leave interrupt */
rt_interrupt_leave();
}
struct sf2_uart uart1=
{
&g_mss_uart1,
UART1_IRQn,
};
struct rt_serial_device serial1;
void uart1_rx_handler(mss_uart_instance_t *this_uart)
{
/* enter interrupt */
rt_interrupt_enter();
rt_hw_serial_isr(&serial1, RT_SERIAL_EVENT_RX_IND);
/* leave interrupt */
rt_interrupt_leave();
}
static rt_err_t sf2_uart_configure(struct rt_serial_device *serial,
struct serial_configure *cfg)
{
uint32_t baudRate;
uint8_t datBits, parity, stopBits;
uint8_t config;
struct sf2_uart *uart;
RT_ASSERT(serial != RT_NULL);
RT_ASSERT(cfg != RT_NULL);
uart = (struct sf2_uart *)serial->parent.user_data;
switch(cfg->data_bits)
{
case DATA_BITS_5: datBits = MSS_UART_DATA_5_BITS; break;
case DATA_BITS_6: datBits = MSS_UART_DATA_6_BITS; break;
case DATA_BITS_7: datBits = MSS_UART_DATA_7_BITS; break;
case DATA_BITS_8: datBits = MSS_UART_DATA_8_BITS; break;
default: datBits = MSS_UART_DATA_8_BITS; break;
}
switch(cfg->parity)
{
case PARITY_NONE: parity = MSS_UART_NO_PARITY; break;
case PARITY_EVEN: parity = MSS_UART_EVEN_PARITY; break;
case PARITY_ODD : parity = MSS_UART_ODD_PARITY; break;
default : parity = MSS_UART_NO_PARITY; break;
}
switch(cfg->stop_bits)
{
case STOP_BITS_1: stopBits = MSS_UART_ONE_STOP_BIT; break;
case STOP_BITS_2: stopBits = MSS_UART_TWO_STOP_BITS; break;
case STOP_BITS_3: stopBits = MSS_UART_ONEHALF_STOP_BIT; break;
default : stopBits = MSS_UART_ONE_STOP_BIT;
}
baudRate = cfg->baud_rate;
config = datBits | parity | stopBits;
MSS_UART_init(uart->uart, baudRate, config);
if(uart->uart == &g_mss_uart0)
MSS_UART_set_rx_handler(uart->uart, uart0_rx_handler, MSS_UART_FIFO_SINGLE_BYTE);
else
MSS_UART_set_rx_handler(uart->uart, uart1_rx_handler, MSS_UART_FIFO_SINGLE_BYTE);
return RT_EOK;
}
static rt_err_t sf2_uart_control(struct rt_serial_device *serial,
int cmd, void *arg)
{
struct sf2_uart* uart;
RT_ASSERT(serial != RT_NULL);
uart = (struct sf2_uart*)serial->parent.user_data;
switch (cmd)
{
case RT_DEVICE_CTRL_CLR_INT:
NVIC_DisableIRQ(uart->irq);
break;
case RT_DEVICE_CTRL_SET_INT:
NVIC_EnableIRQ(uart->irq);
break;
}
return RT_EOK;
}
static int sf2_uart_putc(struct rt_serial_device *serial, char c)
{
struct sf2_uart* uart;
uint32_t tx_ready;
RT_ASSERT(serial != RT_NULL);
uart = (struct sf2_uart*)serial->parent.user_data;
do {
tx_ready = uart->uart->hw_reg->LSR & 0x20u;
} while(!tx_ready);
uart->uart->hw_reg->THR = c;
return 1;
}
static int sf2_uart_getc(struct rt_serial_device *serial)
{
int ch = -1;
uint8_t err_status;
struct sf2_uart* uart;
RT_ASSERT(serial != RT_NULL);
uart = (struct sf2_uart*)serial->parent.user_data;
err_status = MSS_UART_get_rx_status(uart->uart);
if(MSS_UART_NO_ERROR == err_status)
MSS_UART_get_rx(uart->uart, (uint8_t *)&ch, 1);
return ch;
}
static const struct rt_uart_ops sf2_uart_ops =
{
sf2_uart_configure,
sf2_uart_control,
sf2_uart_putc,
sf2_uart_getc,
};
int rt_hw_uart_init(void)
{
rt_err_t result = RT_EOK;
struct sf2_uart* uart;
struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
#ifdef BSP_USING_UART0
uart = &uart0;
serial0.ops = &sf2_uart_ops;
/* default config: 115200, 8, no, 1 */
serial0.config = config;
result = rt_hw_serial_register(&serial0, "uart0", RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX, uart);
RT_ASSERT(result == RT_EOK);
#endif
#ifdef BSP_USING_UART1
uart = &uart1;
serial1.ops = &sf2_uart_ops;
/* default config: 115200, 8, no, 1 */
serial1.config = config;
result = rt_hw_serial_register(&serial1, "uart1", RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX, uart);
RT_ASSERT(result == RT_EOK);
#endif
return result;
}
INIT_BOARD_EXPORT(rt_hw_uart_init);
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