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/*
* File : drv_uart.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2012, RT-Thread Development Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Change Logs:
* Date Author Notes
* 2018-02-22 Tanek first version.
*/
#include <rtthread.h>
#include <rthw.h>
#include <SMM_MPS2.h>
#ifdef RT_USING_UART
#ifndef RT_USING_DEVICE
#error "you must define RT_USING_DEVICE with uart device"
#else
#include <rtdevice.h>
#endif
/* uart driver */
struct v2m_uart
{
struct rt_serial_device serial;
CMSDK_UART_TypeDef * uart_base;
CMSDK_GPIO_TypeDef * rx_pingpio; // Pin GPIO
CMSDK_GPIO_TypeDef * tx_pingpio;
uint8_t rx_pinnum; // Pin Number
uint8_t tx_pinnum;
IRQn_Type uart_irq_rx;
//IRQn_Type uart_irq_tx;
};
#ifdef RT_USING_UART0
struct v2m_uart uart0_device;
#endif
#ifdef RT_USING_UART1
struct v2m_uart uart1_device;
#endif
#ifdef RT_USING_UART2
struct v2m_uart uart2_device;
#endif
static void uart_irq_handler(struct rt_serial_device *serial)
{
uint32_t status;
struct v2m_uart *uart;
uart = (struct v2m_uart *)serial->parent.user_data;
/* enter interrupt */
rt_interrupt_enter();
status = uart->uart_base->INTSTATUS;
rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND);
uart->uart_base->INTCLEAR = status;
/* leave interrupt */
rt_interrupt_leave();
}
#ifdef RT_USING_UART0
void UART0RX_Handler(void)
{
uart_irq_handler(&uart0_device.serial);
}
#endif
#ifdef RT_USING_UART1
void UART1RX_Handler(void)
{
uart_irq_handler(&uart1_device.serial);
}
#endif
#ifdef RT_USING_UART2
void UART2RX_Handler(void)
{
uart_irq_handler(&uart2_device.serial);
}
#endif
static rt_err_t v2m_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
{
struct v2m_uart *uart;
RT_ASSERT(serial != RT_NULL);
RT_ASSERT(cfg != RT_NULL);
uart = (struct v2m_uart *)serial->parent.user_data;
uart->uart_base->BAUDDIV = SystemCoreClock / cfg->baud_rate;
uart->uart_base->CTRL = CMSDK_UART_CTRL_TXEN_Msk | CMSDK_UART_CTRL_RXEN_Msk | CMSDK_UART_CTRL_RXIRQEN_Msk;
uart->rx_pingpio->ALTFUNCSET |= (1u << uart->rx_pinnum);
uart->tx_pingpio->ALTFUNCSET |= (1u << uart->tx_pinnum);
return RT_EOK;
}
static rt_err_t v2m_control(struct rt_serial_device *serial, int cmd, void *arg)
{
struct v2m_uart *uart;
RT_ASSERT(serial != RT_NULL);
uart = (struct v2m_uart *)serial->parent.user_data;
switch (cmd)
{
case RT_DEVICE_CTRL_CLR_INT:
/* disable rx irq */
NVIC_DisableIRQ(uart->uart_irq_rx);
break;
case RT_DEVICE_CTRL_SET_INT:
/* enable rx irq */
NVIC_EnableIRQ(uart->uart_irq_rx);
break;
}
return RT_EOK;
}
static int v2m_putc(struct rt_serial_device *serial, char c)
{
struct v2m_uart *uart;
RT_ASSERT(serial != RT_NULL);
uart = (struct v2m_uart *)serial->parent.user_data;
while (uart->uart_base->STATE & CMSDK_UART_STATE_TXBF_Msk);
uart->uart_base->DATA = c;
return 1;
}
static int v2m_getc(struct rt_serial_device *serial)
{
int ch;
struct v2m_uart *uart;
RT_ASSERT(serial != RT_NULL);
uart = (struct v2m_uart *)serial->parent.user_data;
ch = -1;
if (uart->uart_base->STATE & CMSDK_UART_STATE_RXBF_Msk)
ch = uart->uart_base->DATA & 0xff;
return ch;
}
static const struct rt_uart_ops v2m_uart_ops =
{
v2m_configure,
v2m_control,
v2m_putc,
v2m_getc,
};
int rt_hw_usart_init(void)
{
struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
#ifdef RT_USING_UART0
{
struct v2m_uart* uart;
/* get uart device */
uart = &uart0_device;
/* device initialization */
uart->uart_base = CMSDK_UART0;
uart->uart_irq_rx = UART0RX_IRQn;
uart->serial.ops = &v2m_uart_ops;
uart->serial.config = config;
rt_hw_serial_register(&uart->serial,
"uart0",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
uart);
}
#endif /* RT_USING_UART0 */
#ifdef RT_USING_UART1
{
struct v2m_uart* uart;
/* get uart device */
uart = &uart1_device;
/* device initialization */
uart->uart_base = CMSDK_UART1;
uart->uart_irq_rx = UART1RX_IRQn;
rt_hw_serial_register(&uart->serial,
"uart1",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
uart);
}
#endif /* RT_USING_UART1 */
#ifdef RT_USING_UART2
{
struct v2m_uart* uart;
/* get uart device */
uart = &uart2_device;
/* device initialization */
uart->uart_base = CMSDK_UART2;
uart->uart_irq_rx = UART2RX_IRQn;
rt_hw_serial_register(&uart->serial,
"uart2",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
uart);
}
#endif /* RT_USING_UART2 */
return 0;
}
INIT_BOARD_EXPORT(rt_hw_usart_init);
#endif /*RT_USING_UART*/
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