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rt-thread-official/bsp/gd32450z-eval/drivers/drv_usart.c

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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2009-01-05 Bernard the first version
* 2010-03-29 Bernard remove interrupt Tx and DMA Rx mode
* 2012-02-08 aozima update for F4.
* 2012-07-28 aozima update for ART board.
* 2016-05-28 armink add DMA Rx mode
*/
#include <gd32f4xx.h>
#include <drv_usart.h>
#include <board.h>
#ifdef RT_USING_SERIAL
#if !defined(BSP_USING_UART0) && !defined(BSP_USING_UART1) && \
!defined(BSP_USING_UART2) && !defined(BSP_USING_UART3) && \
!defined(BSP_USING_UART4) && !defined(BSP_USING_UART5) && \
!defined(BSP_USING_UART6) && !defined(BSP_USING_UART7)
#error "Please define at least one UARTx"
#endif
#include <rtdevice.h>
/* GD32 uart driver */
// Todo: compress uart info
struct gd32_uart
{
uint32_t uart_periph; //Todo: 3bits
IRQn_Type irqn; //Todo: 7bits
rcu_periph_enum per_clk; //Todo: 5bits
rcu_periph_enum tx_gpio_clk; //Todo: 5bits
rcu_periph_enum rx_gpio_clk; //Todo: 5bits
uint32_t tx_port; //Todo: 4bits
uint16_t tx_af; //Todo: 4bits
uint16_t tx_pin; //Todo: 4bits
uint32_t rx_port; //Todo: 4bits
uint16_t rx_af; //Todo: 4bits
uint16_t rx_pin; //Todo: 4bits
struct rt_serial_device * serial;
char *device_name;
};
static void uart_isr(struct rt_serial_device *serial);
#if defined(BSP_USING_UART0)
struct rt_serial_device serial0;
void USART0_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
uart_isr(&serial0);
/* leave interrupt */
rt_interrupt_leave();
}
#endif /* BSP_USING_UART0 */
#if defined(BSP_USING_UART1)
struct rt_serial_device serial1;
void USART1_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
uart_isr(&serial1);
/* leave interrupt */
rt_interrupt_leave();
}
#endif /* BSP_USING_UART1 */
#if defined(BSP_USING_UART2)
struct rt_serial_device serial2;
void USART2_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
uart_isr(&serial2);
/* leave interrupt */
rt_interrupt_leave();
}
#endif /* BSP_USING_UART2 */
#if defined(BSP_USING_UART3)
struct rt_serial_device serial3;
void UART3_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
uart_isr(&serial3);
/* leave interrupt */
rt_interrupt_leave();
}
#endif /* BSP_USING_UART3 */
#if defined(BSP_USING_UART4)
struct rt_serial_device serial4;
void UART4_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
uart_isr(&serial4);
/* leave interrupt */
rt_interrupt_leave();
}
#endif /* BSP_USING_UART4 */
#if defined(BSP_USING_UART5)
struct rt_serial_device serial5;
void USART5_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
uart_isr(&serial5);
/* leave interrupt */
rt_interrupt_leave();
}
#endif /* BSP_USING_UART5 */
#if defined(BSP_USING_UART6)
struct rt_serial_device serial6;
void UART6_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
uart_isr(&serial6);
/* leave interrupt */
rt_interrupt_leave();
}
#endif /* BSP_USING_UART6 */
#if defined(BSP_USING_UART7)
struct rt_serial_device serial7;
void UART7_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
uart_isr(&serial7);
/* leave interrupt */
rt_interrupt_leave();
}
#endif /* BSP_USING_UART7 */
static const struct gd32_uart uarts[] = {
#ifdef BSP_USING_UART0
{
USART0, // uart peripheral index
USART0_IRQn, // uart iqrn
RCU_USART0, RCU_GPIOA, RCU_GPIOA, // periph clock, tx gpio clock, rt gpio clock
GPIOA, GPIO_AF_7, GPIO_PIN_9, // tx port, tx alternate, tx pin
GPIOA, GPIO_AF_7, GPIO_PIN_10, // rx port, rx alternate, rx pin
&serial0,
"uart0",
},
#endif
#ifdef BSP_USING_UART1
{
USART1, // uart peripheral index
USART1_IRQn, // uart iqrn
RCU_USART1, RCU_GPIOA, RCU_GPIOA, // periph clock, tx gpio clock, rt gpio clock
GPIOA, GPIO_AF_7, GPIO_PIN_2, // tx port, tx alternate, tx pin
GPIOA, GPIO_AF_7, GPIO_PIN_3, // rx port, rx alternate, rx pin
&serial1,
"uart1",
},
#endif
#ifdef BSP_USING_UART2
{
USART2, // uart peripheral index
USART2_IRQn, // uart iqrn
RCU_USART2, RCU_GPIOB, RCU_GPIOB, // periph clock, tx gpio clock, rt gpio clock
GPIOB, GPIO_AF_7, GPIO_PIN_10, // tx port, tx alternate, tx pin
GPIOB, GPIO_AF_7, GPIO_PIN_11, // rx port, rx alternate, rx pin
&serial2,
"uart2",
},
#endif
#ifdef BSP_USING_UART3
{
UART3, // uart peripheral index
UART3_IRQn, // uart iqrn
RCU_UART3, RCU_GPIOC, RCU_GPIOC, // periph clock, tx gpio clock, rt gpio clock
GPIOC, GPIO_AF_8, GPIO_PIN_10, // tx port, tx alternate, tx pin
GPIOC, GPIO_AF_8, GPIO_PIN_11, // rx port, rx alternate, rx pin
&serial3,
"uart3",
},
#endif
#ifdef BSP_USING_UART4
{
UART4, // uart peripheral index
UART4_IRQn, // uart iqrn
RCU_UART4, RCU_GPIOC, RCU_GPIOD, // periph clock, tx gpio clock, rt gpio clock
GPIOC, GPIO_AF_8, GPIO_PIN_12, // tx port, tx alternate, tx pin
GPIOD, GPIO_AF_8, GPIO_PIN_2, // rx port, rx alternate, rx pin
&serial4,
"uart4",
},
#endif
#ifdef BSP_USING_UART5
{
USART5, // uart peripheral index
USART5_IRQn, // uart iqrn
RCU_USART5, RCU_GPIOC, RCU_GPIOC, // periph clock, tx gpio clock, rt gpio clock
GPIOC, GPIO_AF_8, GPIO_PIN_6, // tx port, tx alternate, tx pin
GPIOC, GPIO_AF_8, GPIO_PIN_7, // rx port, rx alternate, rx pin
&serial5,
"uart5",
},
#endif
#ifdef BSP_USING_UART6
{
UART6, // uart peripheral index
UART6_IRQn, // uart iqrn
RCU_UART6, RCU_GPIOE, RCU_GPIOE, // periph clock, tx gpio clock, rt gpio clock
GPIOE, GPIO_AF_8, GPIO_PIN_8, // tx port, tx alternate, tx pin
GPIOE, GPIO_AF_8, GPIO_PIN_7, // rx port, rx alternate, rx pin
&serial6,
"uart6",
},
#endif
#ifdef BSP_USING_UART7
{
UART7, // uart peripheral index
UART7_IRQn, // uart iqrn
RCU_UART7, RCU_GPIOE, RCU_GPIOE, // periph clock, tx gpio clock, rt gpio clock
GPIOE, GPIO_AF_8, GPIO_PIN_1, // tx port, tx alternate, tx pin
GPIOE, GPIO_AF_8, GPIO_PIN_0, // rx port, rx alternate, rx pin
&serial7,
"uart7",
},
#endif
};
/**
* @brief UART MSP Initialization
* This function configures the hardware resources used in this example:
* - Peripheral's clock enable
* - Peripheral's GPIO Configuration
* - NVIC configuration for UART interrupt request enable
* @param huart: UART handle pointer
* @retval None
*/
void gd32_uart_gpio_init(struct gd32_uart *uart)
{
/* enable USART clock */
rcu_periph_clock_enable(uart->tx_gpio_clk);
rcu_periph_clock_enable(uart->rx_gpio_clk);
rcu_periph_clock_enable(uart->per_clk);
/* connect port to USARTx_Tx */
gpio_af_set(uart->tx_port, uart->tx_af, uart->tx_pin);
/* connect port to USARTx_Rx */
gpio_af_set(uart->rx_port, uart->rx_af, uart->rx_pin);
/* configure USART Tx as alternate function push-pull */
gpio_mode_set(uart->tx_port, GPIO_MODE_AF, GPIO_PUPD_PULLUP, uart->tx_pin);
gpio_output_options_set(uart->tx_port, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, uart->tx_pin);
/* configure USART Rx as alternate function push-pull */
gpio_mode_set(uart->rx_port, GPIO_MODE_AF, GPIO_PUPD_PULLUP, uart->rx_pin);
gpio_output_options_set(uart->rx_port, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, uart->rx_pin);
NVIC_SetPriority(uart->irqn, 0);
NVIC_EnableIRQ(uart->irqn);
}
static rt_err_t gd32_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
{
struct gd32_uart *uart;
RT_ASSERT(serial != RT_NULL);
RT_ASSERT(cfg != RT_NULL);
uart = (struct gd32_uart *)serial->parent.user_data;
gd32_uart_gpio_init(uart);
usart_baudrate_set(uart->uart_periph, cfg->baud_rate);
switch (cfg->data_bits)
{
case DATA_BITS_9:
usart_word_length_set(uart->uart_periph, USART_WL_9BIT);
break;
default:
usart_word_length_set(uart->uart_periph, USART_WL_8BIT);
break;
}
switch (cfg->stop_bits)
{
case STOP_BITS_2:
usart_stop_bit_set(uart->uart_periph, USART_STB_2BIT);
break;
default:
usart_stop_bit_set(uart->uart_periph, USART_STB_1BIT);
break;
}
switch (cfg->parity)
{
case PARITY_ODD:
usart_parity_config(uart->uart_periph, USART_PM_ODD);
break;
case PARITY_EVEN:
usart_parity_config(uart->uart_periph, USART_PM_EVEN);
break;
default:
usart_parity_config(uart->uart_periph, USART_PM_NONE);
break;
}
usart_receive_config(uart->uart_periph, USART_RECEIVE_ENABLE);
usart_transmit_config(uart->uart_periph, USART_TRANSMIT_ENABLE);
usart_enable(uart->uart_periph);
return RT_EOK;
}
static rt_err_t gd32_control(struct rt_serial_device *serial, int cmd, void *arg)
{
struct gd32_uart *uart;
RT_ASSERT(serial != RT_NULL);
uart = (struct gd32_uart *)serial->parent.user_data;
switch (cmd)
{
case RT_DEVICE_CTRL_CLR_INT:
/* disable rx irq */
NVIC_DisableIRQ(uart->irqn);
/* disable interrupt */
usart_interrupt_disable(uart->uart_periph, USART_INT_RBNE);
break;
case RT_DEVICE_CTRL_SET_INT:
/* enable rx irq */
NVIC_EnableIRQ(uart->irqn);
/* enable interrupt */
usart_interrupt_enable(uart->uart_periph, USART_INT_RBNE);
break;
}
return RT_EOK;
}
static int gd32_putc(struct rt_serial_device *serial, char ch)
{
struct gd32_uart *uart;
RT_ASSERT(serial != RT_NULL);
uart = (struct gd32_uart *)serial->parent.user_data;
usart_data_transmit(uart->uart_periph, ch);
while((usart_flag_get(uart->uart_periph, USART_FLAG_TC) == RESET));
return 1;
}
static int gd32_getc(struct rt_serial_device *serial)
{
int ch;
struct gd32_uart *uart;
RT_ASSERT(serial != RT_NULL);
uart = (struct gd32_uart *)serial->parent.user_data;
ch = -1;
if (usart_flag_get(uart->uart_periph, USART_FLAG_RBNE) != RESET)
ch = usart_data_receive(uart->uart_periph);
return ch;
}
/**
* Uart common interrupt process. This need add to uart ISR.
*
* @param serial serial device
*/
static void uart_isr(struct rt_serial_device *serial)
{
struct gd32_uart *uart = (struct gd32_uart *) serial->parent.user_data;
RT_ASSERT(uart != RT_NULL);
/* UART in mode Receiver -------------------------------------------------*/
if ((usart_interrupt_flag_get(uart->uart_periph, USART_INT_FLAG_RBNE) != RESET) &&
(usart_flag_get(uart->uart_periph, USART_FLAG_RBNE) != RESET))
{
rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND);
/* Clear RXNE interrupt flag */
usart_flag_clear(uart->uart_periph, USART_FLAG_RBNE);
}
}
static const struct rt_uart_ops gd32_uart_ops =
{
gd32_configure,
gd32_control,
gd32_putc,
gd32_getc,
};
int gd32_hw_usart_init(void)
{
struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
int i;
for (i = 0; i < sizeof(uarts) / sizeof(uarts[0]); i++)
{
uarts[i].serial->ops = &gd32_uart_ops;
uarts[i].serial->config = config;
/* register UART1 device */
rt_hw_serial_register(uarts[i].serial,
uarts[i].device_name,
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
(void *)&uarts[i]);
}
return 0;
}
INIT_BOARD_EXPORT(gd32_hw_usart_init);
#endif
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