feat : 删除多余代码与多余的文件,修正注释与函数命名

12 files changed, 19 insertions, 596 deletions

diff --git a/bsp/n32g452xx/Libraries/rt_drivers/drv_adc.c b/bsp/n32g452xx/Libraries/rt_drivers/drv_adc.c
index c8082323bd..8450b35014 100644
--- a/bsp/n32g452xx/Libraries/rt_drivers/drv_adc.c
+++ b/bsp/n32g452xx/Libraries/rt_drivers/drv_adc.c
@@ -112,7 +112,6 @@ static rt_err_t n32_adc_enabled(struct rt_adc_device *device, rt_uint32_t channe
 
     n32_msp_adc_init(n32_adc_handler);
 
-    /* ADCx configuration ------------------------------------------------------*/
     ADC_InitStruct(&ADC_InitStructure);
     ADC_InitStructure.WorkMode              = ADC_WORKMODE_INDEPENDENT;
     ADC_InitStructure.MultiChEn             = DISABLE;
@@ -128,11 +127,6 @@ static rt_err_t n32_adc_enabled(struct rt_adc_device *device, rt_uint32_t channe
     /* Enable ADCx */
     ADC_Enable(n32_adc_handler, ENABLE);
 
-    //    /* Enable ADCx reset calibration register */
-    //    ADC_RstCalibration(n32_adc_handler);
-    //    /* Check the end of ADCx reset calibration register */
-    //    while(ADC_GetResetCalibrationStatus(n32_adc_handler));
-
     /* Start ADCx calibration */
     ADC_StartCalibration(n32_adc_handler);
     /* Check the end of ADCx calibration */
diff --git a/bsp/n32g452xx/Libraries/rt_drivers/drv_gpio.c b/bsp/n32g452xx/Libraries/rt_drivers/drv_gpio.c
index 93ed12ea86..40b59d1898 100644
--- a/bsp/n32g452xx/Libraries/rt_drivers/drv_gpio.c
+++ b/bsp/n32g452xx/Libraries/rt_drivers/drv_gpio.c
@@ -24,7 +24,7 @@
 }
 #define __N32_PIN_DEFAULT {-1, 0, 0, 0, 0, 0}
 
-/* STM32 GPIO driver */
+/* N32 GPIO driver */
 struct pin_index
 {
     int index;
diff --git a/bsp/n32g452xx/Libraries/rt_drivers/drv_pwm.c b/bsp/n32g452xx/Libraries/rt_drivers/drv_pwm.c
index 0382da58cd..f61402c9c3 100644
--- a/bsp/n32g452xx/Libraries/rt_drivers/drv_pwm.c
+++ b/bsp/n32g452xx/Libraries/rt_drivers/drv_pwm.c
@@ -12,11 +12,7 @@
 #include "drv_pwm.h"
 
 #ifdef RT_USING_PWM
-#if !defined(BSP_USING_TIM1_CH1) && !defined(BSP_USING_TIM1_CH2) && \
-    !defined(BSP_USING_TIM1_CH3) && !defined(BSP_USING_TIM1_CH4) && \
-    !defined(BSP_USING_TIM2_CH1) && !defined(BSP_USING_TIM2_CH2) && \
-    !defined(BSP_USING_TIM2_CH3) && !defined(BSP_USING_TIM2_CH4) && \
-    !defined(BSP_USING_TIM3_CH1) && !defined(BSP_USING_TIM3_CH2) && \
+#if !defined(BSP_USING_TIM3_CH1) && !defined(BSP_USING_TIM3_CH2) && \
     !defined(BSP_USING_TIM3_CH3) && !defined(BSP_USING_TIM3_CH4)
 #error "Please define at least one BSP_USING_TIMx_CHx"
 #endif
@@ -39,38 +35,6 @@ struct n32_pwm
 
 static struct n32_pwm n32_pwm_obj[] =
 {
-  #ifdef BSP_USING_TIM1_CH1
-    PWM1_CONFIG,
-  #endif
-
-  #ifdef BSP_USING_TIM1_CH2
-    PWM2_CONFIG,
-  #endif
-
-  #ifdef BSP_USING_TIM1_CH3
-    PWM3_CONFIG,
-  #endif
-
-  #ifdef BSP_USING_TIM1_CH4
-    PWM4_CONFIG,
-  #endif
-
-  #ifdef BSP_USING_TIM2_CH1
-    PWM5_CONFIG,
-  #endif
-
-  #ifdef BSP_USING_TIM2_CH2
-    PWM6_CONFIG,
-  #endif
-
-  #ifdef BSP_USING_TIM2_CH3
-    PWM7_CONFIG,
-  #endif
-
-  #ifdef BSP_USING_TIM2_CH4
-    PWM8_CONFIG,
-  #endif
-
 #ifdef BSP_USING_TIM3_CH1
     PWM1_TIM3_CONFIG,
 #endif
diff --git a/bsp/n32g452xx/Libraries/rt_drivers/drv_soft_i2c.c b/bsp/n32g452xx/Libraries/rt_drivers/drv_soft_i2c.c
index 740875bf00..0b49dba5d7 100644
--- a/bsp/n32g452xx/Libraries/rt_drivers/drv_soft_i2c.c
+++ b/bsp/n32g452xx/Libraries/rt_drivers/drv_soft_i2c.c
@@ -42,7 +42,7 @@ static struct n32_i2c i2c_obj[sizeof(soft_i2c_config) / sizeof(soft_i2c_config[0
 /**
  * This function initializes the i2c pin.
  *
- * @param Stm32 i2c dirver class.
+ * @param n32 i2c dirver class.
  */
 static void n32_i2c_gpio_init(struct n32_i2c *i2c)
 {
@@ -58,7 +58,7 @@ static void n32_i2c_gpio_init(struct n32_i2c *i2c)
 /**
  * This function sets the sda pin.
  *
- * @param Stm32 config class.
+ * @param n32 config class.
  * @param The sda pin state.
  */
 static void n32_set_sda(void *data, rt_int32_t state)
@@ -77,7 +77,7 @@ static void n32_set_sda(void *data, rt_int32_t state)
 /**
  * This function sets the scl pin.
  *
- * @param Stm32 config class.
+ * @param n32 config class.
  * @param The scl pin state.
  */
 static void n32_set_scl(void *data, rt_int32_t state)
@@ -164,7 +164,7 @@ static const struct rt_i2c_bit_ops n32_bit_ops_default =
 /**
  * if i2c is locked, this function will unlock it
  *
- * @param at32 config class
+ * @param n32 config class
  *
  * @return RT_EOK indicates successful unlock.
  */
diff --git a/bsp/n32g452xx/Libraries/rt_drivers/drv_soft_i2c.h b/bsp/n32g452xx/Libraries/rt_drivers/drv_soft_i2c.h
index 683b0fe503..af501c3e19 100644
--- a/bsp/n32g452xx/Libraries/rt_drivers/drv_soft_i2c.h
+++ b/bsp/n32g452xx/Libraries/rt_drivers/drv_soft_i2c.h
@@ -15,14 +15,14 @@
 #include <rthw.h>
 #include <rtdevice.h>
 
-/* at32 config class */
+/* n32 config class */
 struct n32_soft_i2c_config
 {
     rt_uint8_t scl;
     rt_uint8_t sda;
     const char *bus_name;
 };
-/* at32 i2c dirver class */
+/* n32 i2c dirver class */
 struct n32_i2c
 {
     struct rt_i2c_bit_ops ops;
diff --git a/bsp/n32g452xx/Libraries/rt_drivers/drv_spi.c b/bsp/n32g452xx/Libraries/rt_drivers/drv_spi.c
deleted file mode 100644
index bfa53afebf..0000000000
--- a/bsp/n32g452xx/Libraries/rt_drivers/drv_spi.c
+++ /dev/null
@@ -1,350 +0,0 @@
-/*
- * Copyright (c) 2006-2021, RT-Thread Development Team
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Change Logs:
- * Date           Author       Notes
- * 2020-01-09     shelton      first version
- */
-
-#include <board.h>
-#include "drv_spi.h"
-
-#ifdef RT_USING_SPI
-#if !defined(BSP_USING_SPI1) && !defined(BSP_USING_SPI2) && \
-    !defined(BSP_USING_SPI3) && !defined(BSP_USING_SPI4)
-#error "Please define at least one SPIx"
-#endif
-
-//#define DEBUG
-
-#define ARR_LEN(__N)      (sizeof(__N) / sizeof(__N[0]))
-
-#ifdef DEBUG
-#define DEBUG_PRINTF(...)   rt_kprintf(__VA_ARGS__)
-#else
-#define DEBUG_PRINTF(...)
-#endif
-
-/* private rt-thread spi ops function */
-static rt_err_t configure(struct rt_spi_device* device, struct rt_spi_configuration* configuration);
-static rt_uint32_t xfer(struct rt_spi_device* device, struct rt_spi_message* message);
-
-static struct rt_spi_ops n32_spi_ops =
-{
-    configure,
-    xfer
-};
-
-/**
-  * Attach the spi device to SPI bus, this function must be used after initialization.
-  */
-rt_err_t rt_hw_spi_device_attach(const char *bus_name, const char *device_name, GPIO_Module *cs_gpiox, uint16_t cs_gpio_pin)
-{
-    RT_ASSERT(bus_name != RT_NULL);
-    RT_ASSERT(device_name != RT_NULL);
-
-    rt_err_t result;
-    struct rt_spi_device *spi_device;
-    struct n32_spi_cs *cs_pin;
-
-    /* initialize the cs pin && select the slave*/
-    GPIO_InitType GPIO_InitStruct;
-    GPIO_InitStruct.Pin = cs_gpio_pin;
-    GPIO_InitStruct.GPIO_Mode = GPIO_Mode_Out_PP;
-    GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
-    GPIO_InitPeripheral(cs_gpiox, &GPIO_InitStruct);
-    GPIO_SetBits(cs_gpiox, cs_gpio_pin);
-
-    /* attach the device to spi bus*/
-    spi_device = (struct rt_spi_device *)rt_malloc(sizeof(struct rt_spi_device));
-    RT_ASSERT(spi_device != RT_NULL);
-    cs_pin = (struct n32_spi_cs *)rt_malloc(sizeof(struct n32_spi_cs));
-    RT_ASSERT(cs_pin != RT_NULL);
-    cs_pin->GPIOx = cs_gpiox;
-    cs_pin->GPIO_Pin = cs_gpio_pin;
-    result = rt_spi_bus_attach_device(spi_device, device_name, bus_name, (void *)cs_pin);
-
-    if (result != RT_EOK)
-    {
-        DEBUG_PRINTF("%s attach to %s faild, %d\n", device_name, bus_name, result);
-    }
-
-    RT_ASSERT(result == RT_EOK);
-
-    DEBUG_PRINTF("%s attach to %s done", device_name, bus_name);
-
-    return result;
-}
-
-static rt_err_t configure(struct rt_spi_device* device,
-                          struct rt_spi_configuration* configuration)
-{
-    struct rt_spi_bus * spi_bus = (struct rt_spi_bus *)device->bus;
-    struct n32_spi *spi_instance = (struct n32_spi *)spi_bus->parent.user_data;
-
-    SPI_InitType SPI_InitStruct;
-
-      RT_ASSERT(device != RT_NULL);
-      RT_ASSERT(configuration != RT_NULL);
-
-    n32_msp_spi_init(spi_instance->config->spix);
-
-    /* data_width */
-    if(configuration->data_width <= 8)
-    {
-        SPI_InitStruct.DataLen = SPI_DATA_SIZE_8BITS;
-    }
-    else if(configuration->data_width <= 16)
-    {
-        SPI_InitStruct.DataLen = SPI_DATA_SIZE_16BITS;
-    }
-    else
-    {
-        return RT_EIO;
-    }
-
-    /* baudrate */
-    {
-        uint32_t spi_apb_clock;
-        uint32_t max_hz;
-        RCC_ClocksType  RCC_Clocks;
-
-        max_hz = configuration->max_hz;
-
-        RCC_GetClocksFreqValue(&RCC_Clocks);
-        DEBUG_PRINTF("sys   freq: %d\n", RCC_Clocks.SysclkFreq);
-        DEBUG_PRINTF("max   freq: %d\n", max_hz);
-
-        if (spi_instance->config->spix == SPI1)
-        {
-            spi_apb_clock = RCC_Clocks.Pclk2Freq;
-            DEBUG_PRINTF("pclk2 freq: %d\n", RCC_Clocks.Pclk2Freq);
-        }
-        else
-        {
-            spi_apb_clock = RCC_Clocks.Pclk1Freq;
-            DEBUG_PRINTF("pclk1 freq: %d\n", RCC_Clocks.Pclk1Freq);
-        }
-
-        if(max_hz >= spi_apb_clock/2)
-        {
-            SPI_InitStruct.BaudRatePres = SPI_BR_PRESCALER_2;
-        }
-        else if (max_hz >= spi_apb_clock/4)
-        {
-            SPI_InitStruct.BaudRatePres = SPI_BR_PRESCALER_4;
-        }
-        else if (max_hz >= spi_apb_clock/8)
-        {
-            SPI_InitStruct.BaudRatePres = SPI_BR_PRESCALER_8;
-        }
-        else if (max_hz >= spi_apb_clock/16)
-        {
-            SPI_InitStruct.BaudRatePres = SPI_BR_PRESCALER_16;
-        }
-        else if (max_hz >= spi_apb_clock/32)
-        {
-            SPI_InitStruct.BaudRatePres = SPI_BR_PRESCALER_32;
-        }
-        else if (max_hz >= spi_apb_clock/64)
-        {
-            SPI_InitStruct.BaudRatePres = SPI_BR_PRESCALER_64;
-        }
-        else if (max_hz >= spi_apb_clock/128)
-        {
-            SPI_InitStruct.BaudRatePres = SPI_BR_PRESCALER_128;
-        }
-        else
-        {
-            /*  min prescaler 256 */
-            SPI_InitStruct.BaudRatePres = SPI_BR_PRESCALER_256;
-        }
-    } /* baudrate */
-
-    switch(configuration->mode & RT_SPI_MODE_3)
-    {
-    case RT_SPI_MODE_0:
-        SPI_InitStruct.CLKPHA = SPI_CLKPHA_FIRST_EDGE;
-        SPI_InitStruct.CLKPOL = SPI_CLKPOL_LOW;
-        break;
-    case RT_SPI_MODE_1:
-        SPI_InitStruct.CLKPHA = SPI_CLKPHA_SECOND_EDGE;
-        SPI_InitStruct.CLKPOL = SPI_CLKPOL_LOW;
-        break;
-    case RT_SPI_MODE_2:
-        SPI_InitStruct.CLKPHA = SPI_CLKPHA_FIRST_EDGE;
-        SPI_InitStruct.CLKPOL = SPI_CLKPOL_HIGH;
-        break;
-    case RT_SPI_MODE_3:
-        SPI_InitStruct.CLKPHA = SPI_CLKPHA_SECOND_EDGE;
-        SPI_InitStruct.CLKPOL = SPI_CLKPOL_HIGH;
-        break;
-    }
-
-    /* MSB or LSB */
-    if(configuration->mode & RT_SPI_MSB)
-    {
-        SPI_InitStruct.FirstBit = SPI_FB_MSB;
-    }
-    else
-    {
-        SPI_InitStruct.FirstBit = SPI_FB_LSB;
-    }
-
-    SPI_InitStruct.DataDirection = SPI_DIR_DOUBLELINE_FULLDUPLEX;
-    SPI_InitStruct.SpiMode = SPI_MODE_MASTER;
-    SPI_InitStruct.NSS = SPI_NSS_SOFT;
-
-    /* init SPI */
-    SPI_Init(spi_instance->config->spix, &SPI_InitStruct);
-    /* Enable SPI_MASTER */
-      SPI_Enable(spi_instance->config->spix, ENABLE);
-    SPI_EnableCalculateCrc(spi_instance->config->spix, DISABLE);
-
-    return RT_EOK;
-};
-
-static rt_uint32_t xfer(struct rt_spi_device* device, struct rt_spi_message* message)
-{
-    struct rt_spi_bus * at32_spi_bus = (struct rt_spi_bus *)device->bus;
-    struct n32_spi *spi_instance = (struct n32_spi *)at32_spi_bus->parent.user_data;
-    struct rt_spi_configuration * config = &device->config;
-    struct n32_spi_cs * at32_spi_cs = device->parent.user_data;
-
-      RT_ASSERT(device != NULL);
-      RT_ASSERT(message != NULL);
-
-    /* take CS */
-    if(message->cs_take)
-    {
-        GPIO_ResetBits(at32_spi_cs->GPIOx, at32_spi_cs->GPIO_Pin);
-        DEBUG_PRINTF("spi take cs\n");
-    }
-
-    {
-        if(config->data_width <= 8)
-        {
-            const rt_uint8_t * send_ptr = message->send_buf;
-            rt_uint8_t * recv_ptr = message->recv_buf;
-            rt_uint32_t size = message->length;
-
-            DEBUG_PRINTF("spi poll transfer start: %d\n", size);
-
-            while(size--)
-            {
-                rt_uint8_t data = 0xFF;
-
-                if(send_ptr != RT_NULL)
-                {
-                    data = *send_ptr++;
-                }
-
-                // Todo: replace register read/write by at32 lib
-                //Wait until the transmit buffer is empty
-                while(RESET == SPI_I2S_GetStatus(spi_instance->config->spix, SPI_I2S_TE_FLAG));
-                // Send the byte
-                        SPI_I2S_TransmitData(spi_instance->config->spix, data);
-
-                //Wait until a data is received
-                while(RESET == SPI_I2S_GetStatus(spi_instance->config->spix, SPI_I2S_RNE_FLAG));
-                // Get the received data
-                data = SPI_I2S_ReceiveData(spi_instance->config->spix);
-
-                if(recv_ptr != RT_NULL)
-                {
-                    *recv_ptr++ = data;
-                }
-            }
-            DEBUG_PRINTF("spi poll transfer finsh\n");
-        }
-        else if(config->data_width <= 16)
-        {
-            const rt_uint16_t * send_ptr = message->send_buf;
-            rt_uint16_t * recv_ptr = message->recv_buf;
-            rt_uint32_t size = message->length;
-
-            while(size--)
-            {
-                rt_uint16_t data = 0xFF;
-
-                if(send_ptr != RT_NULL)
-                {
-                    data = *send_ptr++;
-                }
-
-                //Wait until the transmit buffer is empty
-                while(RESET == SPI_I2S_GetStatus(spi_instance->config->spix, SPI_I2S_TE_FLAG));
-                // Send the byte
-                        SPI_I2S_TransmitData(spi_instance->config->spix, data);
-
-                //Wait until a data is received
-                while(RESET == SPI_I2S_GetStatus(spi_instance->config->spix, SPI_I2S_RNE_FLAG));
-                // Get the received data
-                data = SPI_I2S_ReceiveData(spi_instance->config->spix);
-
-                if(recv_ptr != RT_NULL)
-                {
-                    *recv_ptr++ = data;
-                }
-            }
-        }
-    }
-
-    /* release CS */
-    if(message->cs_release)
-    {
-            GPIO_SetBits(at32_spi_cs->GPIOx, at32_spi_cs->GPIO_Pin);
-        DEBUG_PRINTF("spi release cs\n");
-    }
-
-    return message->length;
-};
-
-static struct n32_spi_config configs[] = {
-#ifdef BSP_USING_SPI1
-    {SPI1, "spi1"},
-#endif
-
-#ifdef BSP_USING_SPI2
-    {SPI2, "spi2"},
-#endif
-
-#ifdef BSP_USING_SPI3
-    {SPI3, "spi3"},
-#endif
-
-#ifdef BSP_USING_SPI4
-    {SPI4, "spi4"},
-#endif
-};
-
-static struct n32_spi spis[sizeof(configs) / sizeof(configs[0])] = {0};
-
-/** \brief init and register at32 spi bus.
- *
- * \param SPI: at32 SPI, e.g: SPI1,SPI2,SPI3.
- * \param spi_bus_name: spi bus name, e.g: "spi1"
- * \return
- *
- */
-int rt_hw_spi_init(void)
-{
-    int i;
-    rt_err_t result;
-    rt_size_t obj_num = sizeof(spis) / sizeof(struct n32_spi);
-
-    for (i = 0; i < obj_num; i++)
-    {
-        spis[i].config = &configs[i];
-        spis[i].spi_bus.parent.user_data = (void *)&spis[i];
-        result = rt_spi_bus_register(&(spis[i].spi_bus), spis[i].config->spi_name, &n32_spi_ops);
-    }
-
-    return result;
-}
-
-INIT_BOARD_EXPORT(rt_hw_spi_init);
-
-#endif
diff --git a/bsp/n32g452xx/Libraries/rt_drivers/drv_spi.h b/bsp/n32g452xx/Libraries/rt_drivers/drv_spi.h
deleted file mode 100644
index 06ad293ecc..0000000000
--- a/bsp/n32g452xx/Libraries/rt_drivers/drv_spi.h
+++ /dev/null
@@ -1,41 +0,0 @@
-/*
- * Copyright (c) 2006-2021, RT-Thread Development Team
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Change Logs:
- * Date           Author       Notes
- * 2020-01-09     shelton      first version
- */
-
-#ifndef __DRV_SPI__
-#define __DRV_SPI__
-
-#include <rtthread.h>
-#include <drivers/spi.h>
-#include "n32g45x.h"
-
-struct n32_spi_config
-{
-    SPI_Module *spix;
-    const char *spi_name;
-};
-
-struct n32_spi
-{
-    struct n32_spi_config *config;
-    struct rt_spi_bus spi_bus;
-};
-
-struct n32_spi_cs
-{
-    GPIO_Module *GPIOx;
-    uint32_t GPIO_Pin;
-};
-
-/* public function */
-int rt_hw_spi_init(void);
-rt_err_t rt_hw_spi_device_attach(const char *bus_name, const char *device_name, GPIO_Module *cs_gpiox, uint16_t cs_gpio_pin);
-
-#endif // __DRV_SPI__
-
diff --git a/bsp/n32g452xx/Libraries/rt_drivers/drv_usart.c b/bsp/n32g452xx/Libraries/rt_drivers/drv_usart.c
index 90b84c9a53..b39298b9a0 100644
--- a/bsp/n32g452xx/Libraries/rt_drivers/drv_usart.c
+++ b/bsp/n32g452xx/Libraries/rt_drivers/drv_usart.c
@@ -49,7 +49,7 @@ struct n32_uart
 
 static void DMA_Configuration(struct rt_serial_device *serial);
 
-static rt_err_t n32_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
+static rt_err_t n32_uart_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
 {
     struct n32_uart* uart;
     USART_InitType USART_InitStructure;
@@ -107,7 +107,7 @@ static rt_err_t n32_configure(struct rt_serial_device *serial, struct serial_con
     return RT_EOK;
 }
 
-static rt_err_t n32_control(struct rt_serial_device *serial, int cmd, void *arg)
+static rt_err_t n32_uart_control(struct rt_serial_device *serial, int cmd, void *arg)
 {
     struct n32_uart* uart;
     rt_uint32_t ctrl_arg = (rt_uint32_t)(arg);
@@ -142,7 +142,7 @@ static rt_err_t n32_control(struct rt_serial_device *serial, int cmd, void *arg)
     return RT_EOK;
 }
 
-static int n32_putc(struct rt_serial_device *serial, char c)
+static int n32_uart_putc(struct rt_serial_device *serial, char c)
 {
     struct n32_uart* uart;
 
@@ -168,7 +168,7 @@ static int n32_putc(struct rt_serial_device *serial, char c)
     return 1;
 }
 
-static int n32_getc(struct rt_serial_device *serial)
+static int n32_uart_getc(struct rt_serial_device *serial)
 {
     int ch;
     struct n32_uart* uart;
@@ -275,16 +275,16 @@ static void uart_isr(struct rt_serial_device *serial)
     }
     if (USART_GetFlagStatus(uart->uart_device, USART_FLAG_OREF) == SET)
     {
-        n32_getc(serial);
+        n32_uart_getc(serial);
     }
 }
 
 static const struct rt_uart_ops n32_uart_ops =
 {
-    n32_configure,
-    n32_control,
-    n32_putc,
-    n32_getc,
+    n32_uart_configure,
+    n32_uart_control,
+    n32_uart_putc,
+    n32_uart_getc,
 };
 
 #if defined(BSP_USING_UART1)
@@ -552,23 +552,6 @@ int rt_hw_usart_init(void)
                           uart);
 #endif /* BSP_USING_UART3 */
 
-#if defined(BSP_USING_UART4)
-    uart = &uart4;
-
-    config.baud_rate = BAUD_RATE_115200;
-
-    serial4.ops    = &n32_uart_ops;
-    serial4.config = config;
-
-    NVIC_Configuration(uart);
-
-    /* register UART4 device */
-    rt_hw_serial_register(&serial4, "uart4",
-                          RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX |
-                          RT_DEVICE_FLAG_INT_TX |   RT_DEVICE_FLAG_DMA_RX,
-                          uart);
-#endif /* BSP_USING_UART4 */
-
     return RT_EOK;
 }
 INIT_BOARD_EXPORT(rt_hw_usart_init);
diff --git a/bsp/n32g452xx/Libraries/rt_drivers/drv_wdt.c b/bsp/n32g452xx/Libraries/rt_drivers/drv_wdt.c
deleted file mode 100644
index 0b304ad1ff..0000000000
--- a/bsp/n32g452xx/Libraries/rt_drivers/drv_wdt.c
+++ /dev/null
@@ -1,124 +0,0 @@
-/*
- * Copyright (c) 2006-2021, RT-Thread Development Team
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Change Logs:
- * Date           Author            Notes
- * 2020-01-22     shelton           first version
- */
-
-#include <board.h>
-#include <drivers/watchdog.h>
-
-#ifdef RT_USING_WDT
-
-#define LSI_VALUE 40000
-
-//#define DRV_DEBUG
-#define LOG_TAG             "drv.wdt"
-#include <drv_log.h>
-
-struct at32_wdt_obj
-{
-    IWDG_Type *instance;
-    rt_uint32_t Prescaler;
-    rt_uint32_t Reload;
-    rt_uint16_t is_start;
-};
-static struct at32_wdt_obj at32_wdt;
-static struct rt_watchdog_ops ops;
-static rt_watchdog_t watchdog;
-
-static rt_err_t wdt_init(rt_watchdog_t *wdt)
-{
-    return RT_EOK;
-}
-
-static rt_err_t wdt_control(rt_watchdog_t *wdt, int cmd, void *arg)
-{
-    switch (cmd)
-    {
-        /* feed the watchdog */
-    case RT_DEVICE_CTRL_WDT_KEEPALIVE:
-        IWDG_ReloadCounter();
-        break;
-        /* set watchdog timeout */
-    case RT_DEVICE_CTRL_WDT_SET_TIMEOUT:
-#if defined(LSI_VALUE)
-        if(LSI_VALUE)
-        {
-            at32_wdt.Reload = (*((rt_uint32_t*)arg)) * LSI_VALUE / 256 ;
-        }
-        else
-        {
-            LOG_E("Please define the value of LSI_VALUE!");
-        }
-        if(at32_wdt.Reload > 0xFFF)
-        {
-            LOG_E("wdg set timeout parameter too large, please less than %ds",0xFFF * 256 / LSI_VALUE);
-            return -RT_EINVAL;
-        }
-#else
-  #error "Please define the value of LSI_VALUE!"
-#endif
-        if(at32_wdt.is_start)
-        {
-            IWDG_KeyRegWrite(IWDG_KeyRegWrite_Enable);
-            IWDG_SetPrescaler(at32_wdt.Prescaler);
-            IWDG_SetReload(at32_wdt.Reload);
-            IWDG_KeyRegWrite(IWDG_KeyRegWrite_Disable);
-            IWDG_Enable();
-        }
-        break;
-    case RT_DEVICE_CTRL_WDT_GET_TIMEOUT:
-#if defined(LSI_VALUE)
-        if(LSI_VALUE)
-        {
-            (*((rt_uint32_t*)arg)) = at32_wdt.Reload * 256 / LSI_VALUE;
-        }
-        else
-        {
-            LOG_E("Please define the value of LSI_VALUE!");
-        }
-#else
-  #error "Please define the value of LSI_VALUE!"
-#endif
-        break;
-    case RT_DEVICE_CTRL_WDT_START:
-        IWDG_KeyRegWrite(IWDG_KeyRegWrite_Enable);
-        IWDG_SetPrescaler(at32_wdt.Prescaler);
-        IWDG_SetReload(at32_wdt.Reload);
-        IWDG_KeyRegWrite(IWDG_KeyRegWrite_Disable);
-        IWDG_Enable();
-        at32_wdt.is_start = 1;
-        break;
-    default:
-        LOG_W("This command is not supported.");
-        return -RT_ERROR;
-    }
-    return RT_EOK;
-}
-
-int rt_hw_wdt_init(void)
-{
-    at32_wdt.instance = IWDG;
-    at32_wdt.Prescaler = IWDG_Psc_256;
-    at32_wdt.Reload = 0x00000FFF;
-    at32_wdt.is_start = 0;
-
-    ops.init = &wdt_init;
-    ops.control = &wdt_control;
-    watchdog.ops = &ops;
-    /* register watchdog device */
-    if (rt_hw_watchdog_register(&watchdog, "wdt", RT_DEVICE_FLAG_DEACTIVATE, RT_NULL) != RT_EOK)
-    {
-        LOG_E("wdt device register failed.");
-        return -RT_ERROR;
-    }
-    LOG_D("wdt device register success.");
-    return RT_EOK;
-}
-INIT_BOARD_EXPORT(rt_hw_wdt_init);
-
-#endif /* RT_USING_WDT */
diff --git a/bsp/n32g452xx/README.md b/bsp/n32g452xx/README.md
deleted file mode 100755
index 710ca97dd6..0000000000
--- a/bsp/n32g452xx/README.md
+++ /dev/null
@@ -1,3 +0,0 @@
-# n32g452xx
-
-:)
\ No newline at end of file
diff --git a/bsp/n32g452xx/n32g452xx-mini-system/board/board.c b/bsp/n32g452xx/n32g452xx-mini-system/board/board.c
index 472768a1af..4405e28941 100644
--- a/bsp/n32g452xx/n32g452xx-mini-system/board/board.c
+++ b/bsp/n32g452xx/n32g452xx-mini-system/board/board.c
@@ -56,7 +56,7 @@ void SysTick_Handler(void)
 }
 
 /**
- * This function will initial AT32 board.
+ * This function will initial N32 board.
  */
 void rt_hw_board_init()
 {
diff --git a/bsp/n32g452xx/n32g452xx-mini-system/board/board.h b/bsp/n32g452xx/n32g452xx-mini-system/board/board.h
index da15643a5b..71f5ca48a0 100644
--- a/bsp/n32g452xx/n32g452xx-mini-system/board/board.h
+++ b/bsp/n32g452xx/n32g452xx-mini-system/board/board.h
@@ -18,7 +18,7 @@
 extern "C" {
 #endif
 
-/* Just only support for AT32F40xxG */
+/* Just only support for N32G452XX */
 #define N32_FLASH_START_ADRESS      ((uint32_t)0x08000000)
 #define FLASH_PAGE_SIZE             (2 * 1024)
 #define N32_FLASH_SIZE              (256 * 1024)