del usart.c usart.h
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/*
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* File : usart.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006-2013, RT-Thread Development Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rt-thread.org/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2017-10-10 Tanek the first version
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*/
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#include <rtthread.h>
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#include "usart.h"
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#include "fsl_common.h"
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#include "fsl_lpuart.h"
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#include "fsl_iomuxc.h"
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#ifdef RT_USING_SERIAL
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#if !defined(RT_USING_UART0) && !defined(RT_USING_UART1) && \
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!defined(RT_USING_UART2) && !defined(RT_USING_UART3) && \
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!defined(RT_USING_UART4) && !defined(RT_USING_UART5) && \
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!defined(RT_USING_UART6) && !defined(RT_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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/* imxrt uart driver */
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struct imxrt_uart
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{
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LPUART_Type * uart_base;
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IRQn_Type irqn;
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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(RT_USING_UART1)
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struct rt_serial_device serial1;
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void LPUART1_IRQHandler(void)
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{
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uart_isr(&serial1);
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}
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#endif /* RT_USING_UART1 */
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#if defined(RT_USING_UART2)
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struct rt_serial_device serial2;
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void USART2_IRQHandler(void)
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{
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uart_isr(&serial2);
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}
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#endif /* RT_USING_UART2 */
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#if defined(RT_USING_UART3)
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struct rt_serial_device serial3;
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void UART3_IRQHandler(void)
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{
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uart_isr(&serial3);
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}
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#endif /* RT_USING_UART3 */
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#if defined(RT_USING_UART4)
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struct rt_serial_device serial4;
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void UART4_IRQHandler(void)
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{
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uart_isr(&serial4);
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}
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#endif /* RT_USING_UART4 */
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#if defined(RT_USING_UART5)
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struct rt_serial_device serial5;
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void USART5_IRQHandler(void)
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{
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uart_isr(&serial5);
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}
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#endif /* RT_USING_UART5 */
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#if defined(RT_USING_UART6)
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struct rt_serial_device serial6;
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void UART6_IRQHandler(void)
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{
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uart_isr(&serial6);
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}
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#endif /* RT_USING_UART6 */
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#if defined(RT_USING_UART7)
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struct rt_serial_device serial7;
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void UART7_IRQHandler(void)
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{
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uart_isr(&serial7);
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}
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#endif /* RT_USING_UART7 */
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#if defined(RT_USING_UART8)
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struct rt_serial_device serial8;
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void UART8_IRQHandler(void)
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{
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uart_isr(&serial8);
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}
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#endif /* RT_USING_UART8 */
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static const struct imxrt_uart uarts[] = {
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#ifdef RT_USING_UART1
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{
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LPUART1,
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LPUART1_IRQn,
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&serial1,
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"uart1",
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},
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#endif
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};
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/* Get debug console frequency. */
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uint32_t BOARD_DebugConsoleSrcFreq(void)
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{
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uint32_t freq;
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/* To make it simple, we assume default PLL and divider settings, and the only variable
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from application is use PLL3 source or OSC source */
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if (CLOCK_GetMux(kCLOCK_UartMux) == 0) /* PLL3 div6 80M */
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{
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freq = (CLOCK_GetPllFreq(kCLOCK_PllUsb1) / 6U) / (CLOCK_GetDiv(kCLOCK_UartDiv) + 1U);
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}
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else
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{
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freq = CLOCK_GetOscFreq() / (CLOCK_GetDiv(kCLOCK_UartDiv) + 1U);
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}
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return freq;
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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 imxrt_uart_gpio_init(struct imxrt_uart *uart)
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{
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if (uart->uart_base == LPUART1)
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{
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CLOCK_EnableClock(kCLOCK_Iomuxc); /* iomuxc clock (iomuxc_clk_enable): 0x03u */
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IOMUXC_SetPinMux(
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IOMUXC_GPIO_AD_B0_12_LPUART1_TX, /* GPIO_AD_B0_12 is configured as LPUART1_TX */
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0U); /* Software Input On Field: Input Path is determined by functionality */
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IOMUXC_SetPinMux(
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IOMUXC_GPIO_AD_B0_13_LPUART1_RX, /* GPIO_AD_B0_13 is configured as LPUART1_RX */
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0U); /* Software Input On Field: Input Path is determined by functionality */
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IOMUXC_SetPinConfig(
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IOMUXC_GPIO_AD_B0_12_LPUART1_TX, /* GPIO_AD_B0_12 PAD functional properties : */
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0x10B0u); /* Slew Rate Field: Slow Slew Rate
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Drive Strength Field: R0/6
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Speed Field: medium(100MHz)
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Open Drain Enable Field: Open Drain Disabled
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Pull / Keep Enable Field: Pull/Keeper Enabled
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Pull / Keep Select Field: Keeper
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Pull Up / Down Config. Field: 100K Ohm Pull Down
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Hyst. Enable Field: Hysteresis Disabled */
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IOMUXC_SetPinConfig(
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IOMUXC_GPIO_AD_B0_13_LPUART1_RX, /* GPIO_AD_B0_13 PAD functional properties : */
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0x10B0u); /* Slew Rate Field: Slow Slew Rate
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Drive Strength Field: R0/6
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Speed Field: medium(100MHz)
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Open Drain Enable Field: Open Drain Disabled
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Pull / Keep Enable Field: Pull/Keeper Enabled
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Pull / Keep Select Field: Keeper
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Pull Up / Down Config. Field: 100K Ohm Pull Down
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Hyst. Enable Field: Hysteresis Disabled */
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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 imxrt_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
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{
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struct imxrt_uart *uart;
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lpuart_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 imxrt_uart *)serial->parent.user_data;
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imxrt_uart_gpio_init(uart);
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LPUART_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.dataBitsCount = kLPUART_SevenDataBits;
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break;
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default:
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config.dataBitsCount = kLPUART_EightDataBits;
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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 = kLPUART_TwoStopBit;
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break;
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default:
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config.stopBitCount = kLPUART_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 = kLPUART_ParityOdd;
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break;
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case PARITY_EVEN:
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config.parityMode = kLPUART_ParityEven;
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break;
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default:
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config.parityMode = kLPUART_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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LPUART_Init(uart->uart_base, &config, BOARD_DebugConsoleSrcFreq());
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return RT_EOK;
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}
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static rt_err_t imxrt_control(struct rt_serial_device *serial, int cmd, void *arg)
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{
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struct imxrt_uart *uart;
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RT_ASSERT(serial != RT_NULL);
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uart = (struct imxrt_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 interrupt */
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LPUART_DisableInterrupts(uart->uart_base, kLPUART_RxDataRegFullInterruptEnable);
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/* disable rx irq */
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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 interrupt */
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LPUART_EnableInterrupts(uart->uart_base, kLPUART_RxDataRegFullInterruptEnable);
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/* enable rx irq */
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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 imxrt_putc(struct rt_serial_device *serial, char ch)
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{
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struct imxrt_uart *uart;
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RT_ASSERT(serial != RT_NULL);
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uart = (struct imxrt_uart *)serial->parent.user_data;
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LPUART_WriteByte(uart->uart_base, ch);
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while(!(LPUART_GetStatusFlags(uart->uart_base) & kLPUART_TxDataRegEmptyFlag));
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return 1;
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}
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static int imxrt_getc(struct rt_serial_device *serial)
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{
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int ch;
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struct imxrt_uart *uart;
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RT_ASSERT(serial != RT_NULL);
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uart = (struct imxrt_uart *)serial->parent.user_data;
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ch = -1;
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if (LPUART_GetStatusFlags(uart->uart_base) & kLPUART_RxDataRegFullFlag)
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ch = LPUART_ReadByte(uart->uart_base);
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return ch;
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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 imxrt_uart *uart;
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LPUART_Type *base;
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RT_ASSERT(serial != RT_NULL);
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uart = (struct imxrt_uart *) serial->parent.user_data;
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RT_ASSERT(uart != RT_NULL);
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base = uart->uart_base;
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RT_ASSERT(base != 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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if (LPUART_GetStatusFlags(base) & kLPUART_RxDataRegFullFlag)
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{
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rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND);
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}
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/* If RX overrun. */
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if (LPUART_STAT_OR_MASK & base->STAT)
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{
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/* Clear overrun flag, otherwise the RX does not work. */
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base->STAT = ((base->STAT & 0x3FE00000U) | LPUART_STAT_OR_MASK);
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}
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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 imxrt_uart_ops =
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{
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imxrt_configure,
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imxrt_control,
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imxrt_putc,
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imxrt_getc,
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};
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int imxrt_hw_usart_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 = &imxrt_uart_ops;
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uarts[i].serial->config = config;
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/* register UART1 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(imxrt_hw_usart_init);
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#endif /*RT_USING_SERIAL */
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@ -1,23 +0,0 @@
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/*
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* File : usart.h
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2009, RT-Thread Development Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rt-thread.org/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2017-10-10 Tanek the first version
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*/
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#ifndef __USART_H__
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#define __USART_H__
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#include <rthw.h>
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#include <rtthread.h>
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int rt_hw_usart_init(void);
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#endif
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