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rt-thread/bsp/lpc55sxx/Libraries/drivers/drv_uart.c

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/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2019-07-15 Magicoe The first version for LPC55S6x
*/
#include <rtthread.h>
#include "drv_uart.h"
#include "fsl_usart.h"
#include "fsl_common.h"
#include "fsl_iocon.h"
#ifdef RT_USING_SERIAL
#if defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL
#error "Please don't define 'FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL'!"
#endif
#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>
/* lpc uart driver */
struct lpc_uart
{
USART_Type *uart_base;
IRQn_Type irqn;
clock_name_t clock_src;
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 FLEXCOMM0_IRQHandler(void)
{
uart_isr(&serial0);
}
#endif /* BSP_USING_UART1 */
#if defined(BSP_USING_UART1)
struct rt_serial_device serial1;
void FLEXCOMM1_IRQHandler(void)
{
uart_isr(&serial1);
}
#endif /* BSP_USING_UART1 */
#if defined(BSP_USING_UART2)
struct rt_serial_device serial2;
void FLEXCOMM2_IRQHandler(void)
{
uart_isr(&serial2);
}
#endif /* BSP_USING_UART2 */
#if defined(BSP_USING_UART3)
struct rt_serial_device serial3;
void FLEXCOMM3_IRQHandler(void)
{
uart_isr(&serial3);
}
#endif /* BSP_USING_UART3 */
#if defined(BSP_USING_UART4)
struct rt_serial_device serial4;
void FLEXCOMM4_IRQHandler(void)
{
uart_isr(&serial4);
}
#endif /* BSP_USING_UART4 */
#if defined(BSP_USING_UART5)
struct rt_serial_device serial5;
void FLEXCOMM5_IRQHandler(void)
{
uart_isr(&serial5);
}
#endif /* BSP_USING_UART5 */
#if defined(BSP_USING_UART6)
struct rt_serial_device serial6;
void FLEXCOMM6_IRQHandler(void)
{
uart_isr(&serial6);
}
#endif /* BSP_USING_UART6 */
#if defined(BSP_USING_UART7)
struct rt_serial_device serial7;
void FLEXCOMM7_IRQHandler(void)
{
uart_isr(&serial7);
}
#endif /* BSP_USING_UART7 */
static const struct lpc_uart uarts[] =
{
#ifdef BSP_USING_UART0
{
USART0,
FLEXCOMM0_IRQn,
kCLOCK_Flexcomm0,
&serial0,
"uart",
},
#endif
#ifdef BSP_USING_UART1
{
USART1,
FLEXCOMM1_IRQn,
kCLOCK_Flexcomm1,
&serial1,
"uart1",
},
#endif
#ifdef BSP_USING_UART2
{
USART2,
FLEXCOMM2_IRQn,
kCLOCK_Flexcomm2,
&serial2,
"uart2",
},
#endif
#ifdef BSP_USING_UART3
{
USART3,
FLEXCOMM3_IRQn,
kCLOCK_Flexcomm3,
&serial3,
"uart3",
},
#endif
#ifdef BSP_USING_UART4
{
USART4,
FLEXCOMM4_IRQn,
kCLOCK_Flexcomm4,
&serial4,
"uart4",
},
#endif
#ifdef BSP_USING_UART5
{
USART5,
FLEXCOMM5_IRQn,
kCLOCK_Flexcomm5,
&serial5,
"uart5",
},
#endif
#ifdef BSP_USING_UART6
{
USART6,
FLEXCOMM6_IRQn,
kCLOCK_Flexcomm6,
&serial6,
"uart6",
},
#endif
#ifdef BSP_USING_UART7
{
USART7,
FLEXCOMM7_IRQn,
kCLOCK_Flexcomm7,
&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 lpc_uart_gpio_init(struct lpc_uart *uart)
{
if (uart->uart_base != RT_NULL)
{
#ifdef BSP_USING_UART0
/* attach 12 MHz clock to FLEXCOMM0 (debug console) */
CLOCK_AttachClk(kFRO12M_to_FLEXCOMM0);
#endif
#ifdef BSP_USING_UART1
/* attach 12 MHz clock to FLEXCOMM1 (debug console) */
CLOCK_AttachClk(kFRO12M_to_FLEXCOMM1);
#endif
#ifdef BSP_USING_UART2
/* attach 12 MHz clock to FLEXCOMM2 (debug console) */
CLOCK_AttachClk(kFRO12M_to_FLEXCOMM2);
#endif
#ifdef BSP_USING_UART3
/* attach 12 MHz clock to FLEXCOMM3 (debug console) */
CLOCK_AttachClk(kFRO12M_to_FLEXCOMM3);
#endif
#ifdef BSP_USING_UART4
/* attach 12 MHz clock to FLEXCOMM4 (debug console) */
CLOCK_AttachClk(kFRO12M_to_FLEXCOMM4);
#endif
#ifdef BSP_USING_UART5
/* attach 12 MHz clock to FLEXCOMM5 (debug console) */
CLOCK_AttachClk(kFRO12M_to_FLEXCOMM5);
#endif
#ifdef BSP_USING_UART6
/* attach 12 MHz clock to FLEXCOMM6 (debug console) */
CLOCK_AttachClk(kFRO12M_to_FLEXCOMM6);
#endif
#ifdef BSP_USING_UART7
/* attach 12 MHz clock to FLEXCOMM7 (debug console) */
CLOCK_AttachClk(kFRO12M_to_FLEXCOMM7);
#endif
}
else
{
RT_ASSERT(RT_NULL);
}
}
static rt_err_t lpc_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
{
struct lpc_uart *uart;
usart_config_t config;
RT_ASSERT(serial != RT_NULL);
RT_ASSERT(cfg != RT_NULL);
uart = (struct lpc_uart *)serial->parent.user_data;
lpc_uart_gpio_init(uart);
/*
* config.baudRate_Bps = 115200U;
* config.parityMode = kUSART_ParityDisabled;
* config.stopBitCount = kUSART_OneStopBit;
* config.loopback = false;
* config.enableTx = false;
* config.enableRx = false;
*/
USART_GetDefaultConfig(&config);
config.baudRate_Bps = cfg->baud_rate;
switch (cfg->data_bits)
{
case DATA_BITS_7:
config.bitCountPerChar = kUSART_7BitsPerChar;
break;
default:
config.bitCountPerChar = kUSART_8BitsPerChar;
break;
}
switch (cfg->stop_bits)
{
case STOP_BITS_2:
config.stopBitCount = kUSART_TwoStopBit;
break;
default:
config.stopBitCount = kUSART_OneStopBit;
break;
}
switch (cfg->parity)
{
case PARITY_ODD:
config.parityMode = kUSART_ParityOdd;
break;
case PARITY_EVEN:
config.parityMode = kUSART_ParityEven;
break;
default:
config.parityMode = kUSART_ParityDisabled;
break;
}
config.enableTx = true;
config.enableRx = true;
USART_Init(uart->uart_base, &config, CLOCK_GetFreq(uart->clock_src));
return RT_EOK;
}
static rt_err_t lpc_control(struct rt_serial_device *serial, int cmd, void *arg)
{
struct lpc_uart *uart;
RT_ASSERT(serial != RT_NULL);
uart = (struct lpc_uart *)serial->parent.user_data;
switch (cmd)
{
case RT_DEVICE_CTRL_CLR_INT:
/* disable rx irq */
USART_DisableInterrupts(uart->uart_base, kUSART_RxLevelInterruptEnable);
DisableIRQ(uart->irqn);
break;
case RT_DEVICE_CTRL_SET_INT:
/* enable rx irq */
USART_EnableInterrupts(uart->uart_base, kUSART_RxLevelInterruptEnable);
EnableIRQ(uart->irqn);
break;
}
return RT_EOK;
}
static int lpc_putc(struct rt_serial_device *serial, char ch)
{
struct lpc_uart *uart;
uart = (struct lpc_uart *)serial->parent.user_data;
while (!(kUSART_TxFifoNotFullFlag & USART_GetStatusFlags(uart->uart_base)));
USART_WriteByte(uart->uart_base, ch);
return 1;
}
static int lpc_getc(struct rt_serial_device *serial)
{
struct lpc_uart *uart;
uart = (struct lpc_uart *)serial->parent.user_data;
if (kUSART_RxFifoNotEmptyFlag & USART_GetStatusFlags(uart->uart_base))
{
return USART_ReadByte(uart->uart_base);
}
else
{
return -1;
}
}
/**
* Uart common interrupt process. This need add to uart ISR.
*
* @param serial serial device
*/
static void uart_isr(struct rt_serial_device *serial)
{
struct lpc_uart *uart;
RT_ASSERT(serial != RT_NULL);
uart = (struct lpc_uart *) serial->parent.user_data;
RT_ASSERT(uart != RT_NULL);
/* enter interrupt */
rt_interrupt_enter();
/* UART in mode Receiver -------------------------------------------------*/
rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND);
/* leave interrupt */
rt_interrupt_leave();
}
static const struct rt_uart_ops lpc_uart_ops =
{
lpc_configure,
lpc_control,
lpc_putc,
lpc_getc,
};
int rt_hw_uart_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 = &lpc_uart_ops;
uarts[i].serial->config = config;
/* register UART 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(rt_hw_uart_init);
#endif /*BSP_USING_SERIAL */
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