438 lines
9.1 KiB
C
438 lines
9.1 KiB
C
/*
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* Copyright (c) 2006-2018, 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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* 2019-07-15 Magicoe The first version for LPC55S6x
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*/
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#include <rtthread.h>
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#include "drv_uart.h"
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#include "fsl_usart.h"
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#include "fsl_common.h"
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#include "fsl_iocon.h"
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#ifdef RT_USING_SERIAL
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#if defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL
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#error "Please don't define 'FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL'!"
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#endif
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#if !defined(BSP_USING_UART0) && \
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!defined(BSP_USING_UART1) && \
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!defined(BSP_USING_UART2) && \
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!defined(BSP_USING_UART3) && \
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!defined(BSP_USING_UART4) && \
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!defined(BSP_USING_UART5) && \
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!defined(BSP_USING_UART6) && \
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!defined(BSP_USING_UART7)
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#error "Please define at least one UARTx"
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#endif
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#include <rtdevice.h>
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/* lpc uart driver */
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struct lpc_uart
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{
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USART_Type *uart_base;
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IRQn_Type irqn;
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clock_name_t clock_src;
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struct rt_serial_device *serial;
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char *device_name;
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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 FLEXCOMM0_IRQHandler(void)
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{
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uart_isr(&serial0);
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}
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#endif /* BSP_USING_UART1 */
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#if defined(BSP_USING_UART1)
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struct rt_serial_device serial1;
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void FLEXCOMM1_IRQHandler(void)
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{
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uart_isr(&serial1);
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}
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#endif /* BSP_USING_UART1 */
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#if defined(BSP_USING_UART2)
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struct rt_serial_device serial2;
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void FLEXCOMM2_IRQHandler(void)
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{
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uart_isr(&serial2);
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}
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#endif /* BSP_USING_UART2 */
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#if defined(BSP_USING_UART3)
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struct rt_serial_device serial3;
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void FLEXCOMM3_IRQHandler(void)
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{
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uart_isr(&serial3);
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}
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#endif /* BSP_USING_UART3 */
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#if defined(BSP_USING_UART4)
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struct rt_serial_device serial4;
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void FLEXCOMM4_IRQHandler(void)
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{
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uart_isr(&serial4);
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}
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#endif /* BSP_USING_UART4 */
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#if defined(BSP_USING_UART5)
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struct rt_serial_device serial5;
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void FLEXCOMM5_IRQHandler(void)
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{
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uart_isr(&serial5);
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}
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#endif /* BSP_USING_UART5 */
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#if defined(BSP_USING_UART6)
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struct rt_serial_device serial6;
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void FLEXCOMM6_IRQHandler(void)
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{
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uart_isr(&serial6);
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}
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#endif /* BSP_USING_UART6 */
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#if defined(BSP_USING_UART7)
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struct rt_serial_device serial7;
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void FLEXCOMM7_IRQHandler(void)
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{
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uart_isr(&serial7);
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}
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#endif /* BSP_USING_UART7 */
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static const struct lpc_uart uarts[] =
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{
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#ifdef BSP_USING_UART0
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{
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USART0,
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FLEXCOMM0_IRQn,
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kCLOCK_Flexcomm0,
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&serial0,
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"uart",
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},
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#endif
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#ifdef BSP_USING_UART1
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{
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USART1,
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FLEXCOMM1_IRQn,
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kCLOCK_Flexcomm1,
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&serial1,
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"uart1",
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},
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#endif
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#ifdef BSP_USING_UART2
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{
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USART2,
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FLEXCOMM2_IRQn,
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kCLOCK_Flexcomm2,
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&serial2,
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"uart2",
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},
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#endif
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#ifdef BSP_USING_UART3
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{
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USART3,
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FLEXCOMM3_IRQn,
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kCLOCK_Flexcomm3,
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&serial3,
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"uart3",
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},
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#endif
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#ifdef BSP_USING_UART4
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{
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USART4,
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FLEXCOMM4_IRQn,
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kCLOCK_Flexcomm4,
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&serial4,
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"uart4",
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},
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#endif
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#ifdef BSP_USING_UART5
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{
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USART5,
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FLEXCOMM5_IRQn,
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kCLOCK_Flexcomm5,
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&serial5,
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"uart5",
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},
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#endif
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#ifdef BSP_USING_UART6
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{
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USART6,
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FLEXCOMM6_IRQn,
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kCLOCK_Flexcomm6,
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&serial6,
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"uart6",
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},
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#endif
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#ifdef BSP_USING_UART7
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{
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USART7,
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FLEXCOMM7_IRQn,
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kCLOCK_Flexcomm7,
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&serial7,
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"uart7",
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},
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#endif
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};
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/**
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* @brief UART MSP Initialization
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* This function configures the hardware resources used in this example:
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* - Peripheral's clock enable
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* - Peripheral's GPIO Configuration
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* - NVIC configuration for UART interrupt request enable
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* @param huart: UART handle pointer
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* @retval None
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*/
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void lpc_uart_gpio_init(struct lpc_uart *uart)
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{
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if (uart->uart_base != RT_NULL)
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{
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#ifdef BSP_USING_UART0
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/* attach 12 MHz clock to FLEXCOMM0 (debug console) */
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CLOCK_AttachClk(kFRO12M_to_FLEXCOMM0);
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#endif
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#ifdef BSP_USING_UART1
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/* attach 12 MHz clock to FLEXCOMM1 (debug console) */
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CLOCK_AttachClk(kFRO12M_to_FLEXCOMM1);
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#endif
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#ifdef BSP_USING_UART2
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/* attach 12 MHz clock to FLEXCOMM2 (debug console) */
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CLOCK_AttachClk(kFRO12M_to_FLEXCOMM2);
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#endif
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#ifdef BSP_USING_UART3
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/* attach 12 MHz clock to FLEXCOMM3 (debug console) */
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CLOCK_AttachClk(kFRO12M_to_FLEXCOMM3);
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#endif
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#ifdef BSP_USING_UART4
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/* attach 12 MHz clock to FLEXCOMM4 (debug console) */
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CLOCK_AttachClk(kFRO12M_to_FLEXCOMM4);
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#endif
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#ifdef BSP_USING_UART5
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/* attach 12 MHz clock to FLEXCOMM5 (debug console) */
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CLOCK_AttachClk(kFRO12M_to_FLEXCOMM5);
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#endif
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#ifdef BSP_USING_UART6
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/* attach 12 MHz clock to FLEXCOMM6 (debug console) */
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CLOCK_AttachClk(kFRO12M_to_FLEXCOMM6);
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#endif
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#ifdef BSP_USING_UART7
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/* attach 12 MHz clock to FLEXCOMM7 (debug console) */
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CLOCK_AttachClk(kFRO12M_to_FLEXCOMM7);
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#endif
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}
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else
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{
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RT_ASSERT(RT_NULL);
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}
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}
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static rt_err_t lpc_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
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{
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struct lpc_uart *uart;
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usart_config_t config;
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RT_ASSERT(serial != RT_NULL);
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RT_ASSERT(cfg != RT_NULL);
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uart = (struct lpc_uart *)serial->parent.user_data;
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lpc_uart_gpio_init(uart);
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/*
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* config.baudRate_Bps = 115200U;
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* config.parityMode = kUSART_ParityDisabled;
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* config.stopBitCount = kUSART_OneStopBit;
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* config.loopback = false;
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* config.enableTx = false;
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* config.enableRx = false;
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*/
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USART_GetDefaultConfig(&config);
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config.baudRate_Bps = cfg->baud_rate;
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switch (cfg->data_bits)
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{
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case DATA_BITS_7:
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config.bitCountPerChar = kUSART_7BitsPerChar;
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break;
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default:
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config.bitCountPerChar = kUSART_8BitsPerChar;
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break;
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}
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switch (cfg->stop_bits)
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{
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case STOP_BITS_2:
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config.stopBitCount = kUSART_TwoStopBit;
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break;
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default:
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config.stopBitCount = kUSART_OneStopBit;
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break;
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}
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switch (cfg->parity)
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{
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case PARITY_ODD:
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config.parityMode = kUSART_ParityOdd;
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break;
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case PARITY_EVEN:
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config.parityMode = kUSART_ParityEven;
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break;
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default:
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config.parityMode = kUSART_ParityDisabled;
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break;
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}
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config.enableTx = true;
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config.enableRx = true;
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USART_Init(uart->uart_base, &config, CLOCK_GetFreq(uart->clock_src));
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return RT_EOK;
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}
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static rt_err_t lpc_control(struct rt_serial_device *serial, int cmd, void *arg)
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{
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struct lpc_uart *uart;
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RT_ASSERT(serial != RT_NULL);
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uart = (struct lpc_uart *)serial->parent.user_data;
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switch (cmd)
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{
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case RT_DEVICE_CTRL_CLR_INT:
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/* disable rx irq */
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USART_DisableInterrupts(uart->uart_base, kUSART_RxLevelInterruptEnable);
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DisableIRQ(uart->irqn);
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break;
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case RT_DEVICE_CTRL_SET_INT:
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/* enable rx irq */
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USART_EnableInterrupts(uart->uart_base, kUSART_RxLevelInterruptEnable);
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EnableIRQ(uart->irqn);
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break;
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}
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return RT_EOK;
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}
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static int lpc_putc(struct rt_serial_device *serial, char ch)
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{
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struct lpc_uart *uart;
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uart = (struct lpc_uart *)serial->parent.user_data;
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while (!(kUSART_TxFifoNotFullFlag & USART_GetStatusFlags(uart->uart_base)));
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USART_WriteByte(uart->uart_base, ch);
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return 1;
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}
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static int lpc_getc(struct rt_serial_device *serial)
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{
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struct lpc_uart *uart;
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uart = (struct lpc_uart *)serial->parent.user_data;
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if (kUSART_RxFifoNotEmptyFlag & USART_GetStatusFlags(uart->uart_base))
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{
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return USART_ReadByte(uart->uart_base);
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}
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else
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{
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return -1;
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}
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}
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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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struct lpc_uart *uart;
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RT_ASSERT(serial != RT_NULL);
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uart = (struct lpc_uart *) serial->parent.user_data;
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RT_ASSERT(uart != RT_NULL);
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/* enter interrupt */
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rt_interrupt_enter();
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/* UART in mode Receiver -------------------------------------------------*/
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rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND);
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/* leave interrupt */
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rt_interrupt_leave();
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}
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static const struct rt_uart_ops lpc_uart_ops =
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{
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lpc_configure,
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lpc_control,
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lpc_putc,
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lpc_getc,
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};
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int rt_hw_uart_init(void)
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{
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struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
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int i;
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for (i = 0; i < sizeof(uarts) / sizeof(uarts[0]); i++)
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{
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uarts[i].serial->ops = &lpc_uart_ops;
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uarts[i].serial->config = config;
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/* register UART device */
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rt_hw_serial_register(uarts[i].serial,
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uarts[i].device_name,
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RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
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(void *)&uarts[i]);
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}
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return 0;
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}
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INIT_BOARD_EXPORT(rt_hw_uart_init);
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#endif /*BSP_USING_SERIAL */
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