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rt-thread/bsp/imxrt/imxrt1052-nxp-evk/board/board.c
Gavin Liu 9791c31c1b imxrt:uart: Add PINs init for each uart port 
Add PINs init function based on the selected UART port.

In general, user should configure all necessary PINs based on
the specific imxrt board in:
    bsp/imxrt/xxxx/board/MCUX_Config/pin_mux.c
There is a convenient GUI tool named MCUXpresso Config Tools,
it's free and can be obtained from NXP offical website. Open
the file:
    bsp/imxrt/imxrt1052-nxp-evk/board/MCUX_Config/MCUX_Config.mex
with MCUXpresso Config Tools, set the necessary PINs (or clocks)
and generate the new code of pin_mux.c (or clock_config.c), the
project can get right configurations based on specific imxrt
board.

But, there is no relation between RT-Thread Kconfig and MCUXpresso
Config Tools. User selects one driver in RT-Thread menuconfig, then
the ping_mux.c should be udpated by MCUXpresso Config Tools to set
the right PIN configurations for the selected driver. It's clear
but a little complex.

We add the PIN init functions for some drivers in the board.c file,
1. It's convenient to usr a driver in RT-Thread. Just select the
   driver, then the code will include all necessary parts, and the
   driver can work well.
2. User can also configure the PINs with MCUXpresso Config Tools.
3. The drivers in bsp/imxrt/libraries/drivers are common for all
   imxrt boards. They may have different PIN configurations based
   on different hardware design. So we put the PIN init functions
   in each board.c file following each different imxrt board.

Signed-off-by: Gavin Liu <gavin-liugang@outlook.com>
2019-09-19 11:13:57 +08:00

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/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2009-01-05 Bernard first implementation
*/
#include <rthw.h>
#include <rtthread.h>
#include "board.h"
#include "pin_mux.h"
#include "fsl_iomuxc.h"
#ifdef BSP_USING_DMA
#include "fsl_dmamux.h"
#include "fsl_edma.h"
#endif
#define NVIC_PRIORITYGROUP_0 0x00000007U /*!< 0 bits for pre-emption priority
4 bits for subpriority */
#define NVIC_PRIORITYGROUP_1 0x00000006U /*!< 1 bits for pre-emption priority
3 bits for subpriority */
#define NVIC_PRIORITYGROUP_2 0x00000005U /*!< 2 bits for pre-emption priority
2 bits for subpriority */
#define NVIC_PRIORITYGROUP_3 0x00000004U /*!< 3 bits for pre-emption priority
1 bits for subpriority */
#define NVIC_PRIORITYGROUP_4 0x00000003U /*!< 4 bits for pre-emption priority
0 bits for subpriority */
/* MPU configuration. */
static void BOARD_ConfigMPU(void)
{
/* Disable I cache and D cache */
SCB_DisableICache();
SCB_DisableDCache();
/* Disable MPU */
ARM_MPU_Disable();
/* Region 0 setting */
MPU->RBAR = ARM_MPU_RBAR(0, 0xC0000000U);
MPU->RASR = ARM_MPU_RASR(0, ARM_MPU_AP_FULL, 2, 0, 0, 0, 0, ARM_MPU_REGION_SIZE_512MB);
/* Region 1 setting */
MPU->RBAR = ARM_MPU_RBAR(1, 0x80000000U);
MPU->RASR = ARM_MPU_RASR(0, ARM_MPU_AP_FULL, 2, 0, 0, 0, 0, ARM_MPU_REGION_SIZE_1GB);
/* Region 2 setting */
// spi flash: normal type, cacheable, no bufferable, no shareable
MPU->RBAR = ARM_MPU_RBAR(2, 0x60000000U);
MPU->RASR = ARM_MPU_RASR(0, ARM_MPU_AP_FULL, 0, 0, 1, 0, 0, ARM_MPU_REGION_SIZE_512MB);
/* Region 3 setting */
MPU->RBAR = ARM_MPU_RBAR(3, 0x00000000U);
MPU->RASR = ARM_MPU_RASR(0, ARM_MPU_AP_FULL, 2, 0, 0, 0, 0, ARM_MPU_REGION_SIZE_1GB);
/* Region 4 setting */
MPU->RBAR = ARM_MPU_RBAR(4, 0x00000000U);
MPU->RASR = ARM_MPU_RASR(0, ARM_MPU_AP_FULL, 0, 0, 1, 1, 0, ARM_MPU_REGION_SIZE_128KB);
/* Region 5 setting */
MPU->RBAR = ARM_MPU_RBAR(5, 0x20000000U);
MPU->RASR = ARM_MPU_RASR(0, ARM_MPU_AP_FULL, 0, 0, 1, 1, 0, ARM_MPU_REGION_SIZE_128KB);
/* Region 6 setting */
MPU->RBAR = ARM_MPU_RBAR(6, 0x20200000U);
MPU->RASR = ARM_MPU_RASR(0, ARM_MPU_AP_FULL, 0, 0, 1, 1, 0, ARM_MPU_REGION_SIZE_256KB);
#if defined(BSP_USING_SDRAM)
/* Region 7 setting */
MPU->RBAR = ARM_MPU_RBAR(7, 0x80000000U);
MPU->RASR = ARM_MPU_RASR(0, ARM_MPU_AP_FULL, 0, 0, 1, 1, 0, ARM_MPU_REGION_SIZE_32MB);
/* Region 8 setting */
MPU->RBAR = ARM_MPU_RBAR(8, 0x81E00000U);
MPU->RASR = ARM_MPU_RASR(0, ARM_MPU_AP_FULL, 1, 1, 0, 0, 0, ARM_MPU_REGION_SIZE_2MB);
#endif
/* Enable MPU */
ARM_MPU_Enable(MPU_CTRL_PRIVDEFENA_Msk);
/* Enable I cache and D cache */
SCB_EnableDCache();
SCB_EnableICache();
}
/* This is the timer interrupt service routine. */
void SysTick_Handler(void)
{
/* enter interrupt */
rt_interrupt_enter();
rt_tick_increase();
/* leave interrupt */
rt_interrupt_leave();
}
#ifdef BSP_USING_DMA
void imxrt_dma_init(void)
{
edma_config_t config;
DMAMUX_Init(DMAMUX);
EDMA_GetDefaultConfig(&config);
EDMA_Init(DMA0, &config);
}
#endif
#ifdef BSP_USING_LPUART
void imxrt_uart_pins_init(void)
{
#ifdef BSP_USING_LPUART1
IOMUXC_SetPinMux(
IOMUXC_GPIO_AD_B0_12_LPUART1_TX, /* GPIO_AD_B0_12 is configured as LPUART1_TX */
0U); /* Software Input On Field: Input Path is determined by functionality */
IOMUXC_SetPinMux(
IOMUXC_GPIO_AD_B0_13_LPUART1_RX, /* GPIO_AD_B0_13 is configured as LPUART1_RX */
0U); /* Software Input On Field: Input Path is determined by functionality */
IOMUXC_SetPinConfig(
IOMUXC_GPIO_AD_B0_12_LPUART1_TX, /* GPIO_AD_B0_12 PAD functional properties : */
0x10B0u); /* Slew Rate Field: Slow Slew Rate
Drive Strength Field: R0/6
Speed Field: medium(100MHz)
Open Drain Enable Field: Open Drain Disabled
Pull / Keep Enable Field: Pull/Keeper Enabled
Pull / Keep Select Field: Keeper
Pull Up / Down Config. Field: 100K Ohm Pull Down
Hyst. Enable Field: Hysteresis Disabled */
IOMUXC_SetPinConfig(
IOMUXC_GPIO_AD_B0_13_LPUART1_RX, /* GPIO_AD_B0_13 PAD functional properties : */
0x10B0u); /* Slew Rate Field: Slow Slew Rate
Drive Strength Field: R0/6
Speed Field: medium(100MHz)
Open Drain Enable Field: Open Drain Disabled
Pull / Keep Enable Field: Pull/Keeper Enabled
Pull / Keep Select Field: Keeper
Pull Up / Down Config. Field: 100K Ohm Pull Down
Hyst. Enable Field: Hysteresis Disabled */
#endif
#ifdef BSP_USING_LPUART2
IOMUXC_SetPinMux(
IOMUXC_GPIO_AD_B1_02_LPUART2_TX,
0U);
IOMUXC_SetPinMux(
IOMUXC_GPIO_AD_B1_03_LPUART2_RX,
0U);
IOMUXC_SetPinConfig(
IOMUXC_GPIO_AD_B1_02_LPUART2_TX,
0x10B0u);
IOMUXC_SetPinConfig(
IOMUXC_GPIO_AD_B1_03_LPUART2_RX,
0x10B0u);
#endif
#ifdef BSP_USING_LPUART3
IOMUXC_SetPinMux(
IOMUXC_GPIO_AD_B1_06_LPUART3_TX,
0U);
IOMUXC_SetPinMux(
IOMUXC_GPIO_AD_B1_07_LPUART3_RX,
0U);
IOMUXC_SetPinConfig(
IOMUXC_GPIO_AD_B1_06_LPUART3_TX,
0x10B0u);
IOMUXC_SetPinConfig(
IOMUXC_GPIO_AD_B1_07_LPUART3_RX,
0x10B0u);
#endif
#ifdef BSP_USING_LPUART4
IOMUXC_SetPinMux(
IOMUXC_GPIO_B1_00_LPUART4_TX,
0U);
IOMUXC_SetPinMux(
IOMUXC_GPIO_B1_01_LPUART4_RX,
0U);
IOMUXC_SetPinConfig(
IOMUXC_GPIO_B1_00_LPUART4_TX,
0x10B0u);
IOMUXC_SetPinConfig(
IOMUXC_GPIO_B1_01_LPUART4_RX,
0x10B0u);
#endif
#ifdef BSP_USING_LPUART5
IOMUXC_SetPinMux(
IOMUXC_GPIO_B1_12_LPUART5_TX,
0U);
IOMUXC_SetPinMux(
IOMUXC_GPIO_B1_13_LPUART5_RX,
0U);
IOMUXC_SetPinConfig(
IOMUXC_GPIO_B1_12_LPUART5_TX,
0x10B0u);
IOMUXC_SetPinConfig(
IOMUXC_GPIO_B1_13_LPUART5_RX,
0x10B0u);
#endif
#ifdef BSP_USING_LPUART6
IOMUXC_SetPinMux(
IOMUXC_GPIO_AD_B0_02_LPUART6_TX,
0U);
IOMUXC_SetPinMux(
IOMUXC_GPIO_AD_B0_03_LPUART6_RX,
0U);
IOMUXC_SetPinConfig(
IOMUXC_GPIO_AD_B0_02_LPUART6_TX,
0x10B0u);
IOMUXC_SetPinConfig(
IOMUXC_GPIO_AD_B0_03_LPUART6_RX,
0x10B0u);
#endif
#ifdef BSP_USING_LPUART7
IOMUXC_SetPinMux(
IOMUXC_GPIO_EMC_31_LPUART7_TX,
0U);
IOMUXC_SetPinMux(
IOMUXC_GPIO_EMC_32_LPUART7_RX,
0U);
IOMUXC_SetPinConfig(
IOMUXC_GPIO_EMC_31_LPUART7_TX,
0x10B0u);
IOMUXC_SetPinConfig(
IOMUXC_GPIO_EMC_32_LPUART7_RX,
0x10B0u);
#endif
#ifdef BSP_USING_LPUART8
IOMUXC_SetPinMux(
IOMUXC_GPIO_AD_B1_10_LPUART8_TX,
0U);
IOMUXC_SetPinMux(
IOMUXC_GPIO_AD_B1_11_LPUART8_RX,
0U);
IOMUXC_SetPinConfig(
IOMUXC_GPIO_AD_B1_10_LPUART8_TX,
0x10B0u);
IOMUXC_SetPinConfig(
IOMUXC_GPIO_AD_B1_11_LPUART8_RX,
0x10B0u);
#endif
}
#endif /* BSP_USING_LPUART */
/**
* This function will initial rt1050 board.
*/
void rt_hw_board_init()
{
BOARD_ConfigMPU();
BOARD_InitPins();
BOARD_BootClockRUN();
NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_4);
SysTick_Config(SystemCoreClock / RT_TICK_PER_SECOND);
#ifdef BSP_USING_LPUART
imxrt_uart_pins_init();
#endif
#ifdef BSP_USING_DMA
imxrt_dma_init();
#endif
#ifdef RT_USING_HEAP
rt_system_heap_init((void *)HEAP_BEGIN, (void *)HEAP_END);
#endif
#ifdef RT_USING_COMPONENTS_INIT
rt_components_board_init();
#endif
#ifdef RT_USING_CONSOLE
rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
#endif
}
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