STM32F103移值RT-Thread Nano添加与FinSH标准库程序一些资源
RT-Thread官方提供的是HAL库的源码，和标准库函数还是有区别的，这里我了标准库下的移值，供有需要的人参考。
#include "sys.h"
#include "usart.h"
#include "rtthread.h"
#define rt_ringbuffer_space_len(rb) ((rb)->buffer_size - rt_ringbuffer_data_len(rb))
struct rt_ringbuffer
{
rt_uint8_t *buffer_ptr;
rt_uint16_t read_mirror : 1;
rt_uint16_t read_index : 15;
rt_uint16_t write_mirror : 1;
rt_uint16_t write_index : 15;
rt_int16_t buffer_size;
};
enum rt_ringbuffer_state
{
RT_RINGBUFFER_EMPTY,
RT_RINGBUFFER_FULL,
/* half full is neither full nor empty */
RT_RINGBUFFER_HALFFULL,
};
rt_inline enum rt_ringbuffer_state rt_ringbuffer_status(struct rt_ringbuffer *rb)
{
if (rb->read_index == rb->write_index)
{
if (rb->read_mirror == rb->write_mirror)
return RT_RINGBUFFER_EMPTY;
else
return RT_RINGBUFFER_FULL;
}
return RT_RINGBUFFER_HALFFULL;
}
/**
* get the size of data in rb
*/
rt_size_t rt_ringbuffer_data_len(struct rt_ringbuffer *rb)
{
switch (rt_ringbuffer_status(rb))
{
case RT_RINGBUFFER_EMPTY:
return 0;
case RT_RINGBUFFER_FULL:
return rb->buffer_size;
case RT_RINGBUFFER_HALFFULL:
default:
if (rb->write_index > rb->read_index)
return rb->write_index - rb->read_index;
else
return rb->buffer_size - (rb->read_index - rb->write_index);
};
}
void rt_ringbuffer_init(struct rt_ringbuffer *rb,
rt_uint8_t *pool,
rt_int16_t size)
{
RT_ASSERT(rb != RT_NULL);
RT_ASSERT(size > 0);
/* initialize read and write index */
rb->read_mirror = rb->read_index = 0;
rb->write_mirror = rb->write_index = 0;
/* set buffer pool and size */
rb->buffer_ptr = pool;
rb->buffer_size = RT_ALIGN_DOWN(size, RT_ALIGN_SIZE);
}
/**
* put a character into ring buffer
*/
rt_size_t rt_ringbuffer_putchar(struct rt_ringbuffer *rb, const rt_uint8_t ch)
{
RT_ASSERT(rb != RT_NULL);
/* whether has enough space */
if (!rt_ringbuffer_space_len(rb))
return 0;
rb->buffer_ptr[rb->write_index] = ch;
/* flip mirror */
if (rb->write_index == rb->buffer_size-1)
{
rb->write_mirror = ~rb->write_mirror;
rb->write_index = 0;
}
else
{
rb->write_index++;
}
return 1;
}
/**
* get a character from a ringbuffer
*/
rt_size_t rt_ringbuffer_getchar(struct rt_ringbuffer *rb, rt_uint8_t *ch)
{
RT_ASSERT(rb != RT_NULL);
/* ringbuffer is empty */
if (!rt_ringbuffer_data_len(rb))
return 0;
/* put character */
*ch = rb->buffer_ptr[rb->read_index];
if (rb->read_index == rb->buffer_size-1)
{
rb->read_mirror = ~rb->read_mirror;
rb->read_index = 0;
}
else
{
rb->read_index++;
}
return 1;
}
/*******************************************************************************
* Function Name : uart_init
* Description :
* Input : None
* Output : None
* Return : None
*******************************************************************************/
/* 第二部分：finsh 移植对接部分 */
#define UART_RX_BUF_LEN 16
rt_uint8_t uart_rx_buf[UART_RX_BUF_LEN] = {0};
struct rt_ringbuffer uart_rxcb; /* 定义一个 ringbuffer cb */
//static UART_HandleTypeDef UartHandle;
static struct rt_semaphore shell_rx_sem; /* 定义一个静态信号量 */
void USART1_Init(u32 bound)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
/* 初始化串口接收 ringbuffer */
rt_ringbuffer_init(&uart_rxcb, uart_rx_buf, UART_RX_BUF_LEN);
/* 初始化串口接收数据的信号量 */
rt_sem_init(&(shell_rx_sem), "shell_rx", 0, 0);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA, ENABLE); //使能USART1，GPIOA时钟
//USART1_TX GPIOA.9
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //PA.9
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出
GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIOA.9
//USART1_RX GPIOA.10初始化
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;//PA10
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入
GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIOA.10
//Usart1 NVIC 配置
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;//抢占优先级3
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //子优先级3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道使能
NVIC_Init(&NVIC_InitStructure); //根据指定的参数初始化VIC寄存器
USART_InitStructure.USART_BaudRate = bound;//串口波特率
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长为8位数据格式
USART_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位
USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验位
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //收发模式
USART_Init(USART1, &USART_InitStructure); //初始化串口1
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//开启串口接受中断
USART_Cmd(USART1, ENABLE); //使能串口1
}
/*******************************************************************************
* Function Name : uart_send_byte
* Description :
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void uart_send_byte(u8 data)
{
while((USART1->SR & 0X40) == 0);
USART1->DR = data;
}
/* 移植控制台，实现控制台输出, 对接 rt_hw_console_output */
void rt_hw_console_output(const char *str)
{
rt_size_t i = 0, size = 0;
char a = 'r';
size = rt_strlen(str);
for (i = 0; i < size; i++)
{
if (*(str + i) == 'n')
{
uart_send_byte(a);
}
uart_send_byte(str
);
}
}
/* 移植 FinSH，实现命令行交互, 需要添加 FinSH 源码，然后再对接 rt_hw_console_getchar */
/* 中断方式 */
char rt_hw_console_getchar(void)
{
char ch = 0;
/* 从 ringbuffer 中拿出数据 */
while (rt_ringbuffer_getchar(&uart_rxcb, (rt_uint8_t *)&ch) != 1)
{
rt_sem_take(&shell_rx_sem, RT_WAITING_FOREVER);
}
return ch;
}
/*******************************************************************************
* Function Name : USART1_IRQHandler
* Description :
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void USART1_IRQHandler(void)
{
int ch = -1;
/* enter interrupt */
rt_interrupt_enter(); //在中断中一定要调用这对函数，进入中断
if ((USART_GetFlagStatus(USART1, USART_FLAG_RXNE) != RESET) &&
(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET))
{
while (1)
{
ch = -1;
if (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) != RESET)
{
ch = USART1->DR & 0xff;
}
if (ch == -1)
{
break;
}
/* 读取到数据，将数据存入 ringbuffer */
rt_ringbuffer_putchar(&uart_rxcb, ch);
}
rt_sem_release(&shell_rx_sem);
}
/* leave interrupt */
rt_interrupt_leave(); //在中断中一定要调用这对函数，离开中断
}
然后在board.c文件中的void rt_hw_board_init()函数里调用串口初始化函数
。
STM32F103移值RT-Thread Nano添加与FinSH标准库程序一些资源
RT-Thread官方提供的是HAL库的源码，和标准库函数还是有区别的，这里我了标准库下的移值，供有需要的人参考。
#include "sys.h"
#include "usart.h"
#include "rtthread.h"
#define rt_ringbuffer_space_len(rb) ((rb)->buffer_size - rt_ringbuffer_data_len(rb))
struct rt_ringbuffer
{
rt_uint8_t *buffer_ptr;
rt_uint16_t read_mirror : 1;
rt_uint16_t read_index : 15;
rt_uint16_t write_mirror : 1;
rt_uint16_t write_index : 15;
rt_int16_t buffer_size;
};
enum rt_ringbuffer_state
{
RT_RINGBUFFER_EMPTY,
RT_RINGBUFFER_FULL,
/* half full is neither full nor empty */
RT_RINGBUFFER_HALFFULL,
};
rt_inline enum rt_ringbuffer_state rt_ringbuffer_status(struct rt_ringbuffer *rb)
{
if (rb->read_index == rb->write_index)
{
if (rb->read_mirror == rb->write_mirror)
return RT_RINGBUFFER_EMPTY;
else
return RT_RINGBUFFER_FULL;
}
return RT_RINGBUFFER_HALFFULL;
}
/**
* get the size of data in rb
*/
rt_size_t rt_ringbuffer_data_len(struct rt_ringbuffer *rb)
{
switch (rt_ringbuffer_status(rb))
{
case RT_RINGBUFFER_EMPTY:
return 0;
case RT_RINGBUFFER_FULL:
return rb->buffer_size;
case RT_RINGBUFFER_HALFFULL:
default:
if (rb->write_index > rb->read_index)
return rb->write_index - rb->read_index;
else
return rb->buffer_size - (rb->read_index - rb->write_index);
};
}
void rt_ringbuffer_init(struct rt_ringbuffer *rb,
rt_uint8_t *pool,
rt_int16_t size)
{
RT_ASSERT(rb != RT_NULL);
RT_ASSERT(size > 0);
/* initialize read and write index */
rb->read_mirror = rb->read_index = 0;
rb->write_mirror = rb->write_index = 0;
/* set buffer pool and size */
rb->buffer_ptr = pool;
rb->buffer_size = RT_ALIGN_DOWN(size, RT_ALIGN_SIZE);
}
/**
* put a character into ring buffer
*/
rt_size_t rt_ringbuffer_putchar(struct rt_ringbuffer *rb, const rt_uint8_t ch)
{
RT_ASSERT(rb != RT_NULL);
/* whether has enough space */
if (!rt_ringbuffer_space_len(rb))
return 0;
rb->buffer_ptr[rb->write_index] = ch;
/* flip mirror */
if (rb->write_index == rb->buffer_size-1)
{
rb->write_mirror = ~rb->write_mirror;
rb->write_index = 0;
}
else
{
rb->write_index++;
}
return 1;
}
/**
* get a character from a ringbuffer
*/
rt_size_t rt_ringbuffer_getchar(struct rt_ringbuffer *rb, rt_uint8_t *ch)
{
RT_ASSERT(rb != RT_NULL);
/* ringbuffer is empty */
if (!rt_ringbuffer_data_len(rb))
return 0;
/* put character */
*ch = rb->buffer_ptr[rb->read_index];
if (rb->read_index == rb->buffer_size-1)
{
rb->read_mirror = ~rb->read_mirror;
rb->read_index = 0;
}
else
{
rb->read_index++;
}
return 1;
}
/*******************************************************************************
* Function Name : uart_init
* Description :
* Input : None
* Output : None
* Return : None
*******************************************************************************/
/* 第二部分：finsh 移植对接部分 */
#define UART_RX_BUF_LEN 16
rt_uint8_t uart_rx_buf[UART_RX_BUF_LEN] = {0};
struct rt_ringbuffer uart_rxcb; /* 定义一个 ringbuffer cb */
//static UART_HandleTypeDef UartHandle;
static struct rt_semaphore shell_rx_sem; /* 定义一个静态信号量 */
void USART1_Init(u32 bound)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
/* 初始化串口接收 ringbuffer */
rt_ringbuffer_init(&uart_rxcb, uart_rx_buf, UART_RX_BUF_LEN);
/* 初始化串口接收数据的信号量 */
rt_sem_init(&(shell_rx_sem), "shell_rx", 0, 0);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA, ENABLE); //使能USART1，GPIOA时钟
//USART1_TX GPIOA.9
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //PA.9
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出
GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIOA.9
//USART1_RX GPIOA.10初始化
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;//PA10
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入
GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIOA.10
//Usart1 NVIC 配置
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;//抢占优先级3
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //子优先级3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道使能
NVIC_Init(&NVIC_InitStructure); //根据指定的参数初始化VIC寄存器
USART_InitStructure.USART_BaudRate = bound;//串口波特率
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长为8位数据格式
USART_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位
USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验位
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //收发模式
USART_Init(USART1, &USART_InitStructure); //初始化串口1
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//开启串口接受中断
USART_Cmd(USART1, ENABLE); //使能串口1
}
/*******************************************************************************
* Function Name : uart_send_byte
* Description :
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void uart_send_byte(u8 data)
{
while((USART1->SR & 0X40) == 0);
USART1->DR = data;
}
/* 移植控制台，实现控制台输出, 对接 rt_hw_console_output */
void rt_hw_console_output(const char *str)
{
rt_size_t i = 0, size = 0;
char a = 'r';
size = rt_strlen(str);
for (i = 0; i < size; i++)
{
if (*(str + i) == 'n')
{
uart_send_byte(a);
}
uart_send_byte(str
);
}
}
/* 移植 FinSH，实现命令行交互, 需要添加 FinSH 源码，然后再对接 rt_hw_console_getchar */
/* 中断方式 */
char rt_hw_console_getchar(void)
{
char ch = 0;
/* 从 ringbuffer 中拿出数据 */
while (rt_ringbuffer_getchar(&uart_rxcb, (rt_uint8_t *)&ch) != 1)
{
rt_sem_take(&shell_rx_sem, RT_WAITING_FOREVER);
}
return ch;
}
/*******************************************************************************
* Function Name : USART1_IRQHandler
* Description :
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void USART1_IRQHandler(void)
{
int ch = -1;
/* enter interrupt */
rt_interrupt_enter(); //在中断中一定要调用这对函数，进入中断
if ((USART_GetFlagStatus(USART1, USART_FLAG_RXNE) != RESET) &&
(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET))
{
while (1)
{
ch = -1;
if (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) != RESET)
{
ch = USART1->DR & 0xff;
}
if (ch == -1)
{
break;
}
/* 读取到数据，将数据存入 ringbuffer */
rt_ringbuffer_putchar(&uart_rxcb, ch);
}
rt_sem_release(&shell_rx_sem);
}
/* leave interrupt */
rt_interrupt_leave(); //在中断中一定要调用这对函数，离开中断
}
然后在board.c文件中的void rt_hw_board_init()函数里调用串口初始化函数
。
举报
