#include "UartSet.h"
#include "string.h"
typedef enum
{
TimeRecvStartStep1 = 0,
TimeRecvStep2 = 1,
TimeRecvStep3 = 2,
TimeRecvStep1 = 3,
TimeSendStep = 4,
} TimeStep;
uint16_t TimeSet[5];
uint16_t TimeSetBuff[][5] = {{1199, 59, 59, 2378, 2498 }, //1200
{539, 59, 59, 1128, 1247 }, //2400
{239, 59, 59, 503, 624 }, //4800
{149, 29, 29, 251, 311 }, //9600
{0, 0, 0, 0, 0 }, //预留
};
UART gsUARTBuff; //定义串口
uint8_t ucRecvData = 0; //每次接收的字节
uint8_t ucAcquCx = 0; //三次滤波计数
uint8_t ucRecvBitCx = 0; //接收位计数
uint8_t ucSendBitCx = 0; //发送位计数
uint8_t ucSendLengCx = 0; //发送长度计数
uint8_t ucRecvBitBuff = 0; //采集位保存
TIM_HandleTypeDef htim6;
void MX_TIM6_Init(void)
{
__HAL_RCC_TIM6_CLK_ENABLE();
htim6.Instance = TIM6;
htim6.Init.Prescaler = 15;
htim6.Init.CounterMode = TIM_COUNTERMODE_UP;
htim6.Init.Period = TimeSet[TimeRecvStartStep1];
htim6.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_ENABLE;
HAL_NVIC_SetPriority(TIM6_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(TIM6_IRQn);
HAL_TIM_Base_Init(&htim6);
}
void UART_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
__HAL_RCC_GPIOB_CLK_ENABLE();
GPIO_InitStruct.Pin = COM_TX_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(COM_TX_GPIO_Port, &GPIO_InitStruct);
GPIO_InitStruct.Pin = COM_RX_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_IT_FALLING;
GPIO_InitStruct.Pull = GPIO_PULLUP;
HAL_GPIO_Init(COM_RX_GPIO_Port, &GPIO_InitStruct);
HAL_NVIC_SetPriority(EXTI4_15_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(EXTI4_15_IRQn);
}
/*******************************************************************************
* @FunctionName : UART_Init.
* [url=home.php?mod=space&uid=1841158]@description[/url] : 模拟串口结构体初始化.
* [url=home.php?mod=space&uid=108799]@Input[/url] : None.
* [url=home.php?mod=space&uid=327807]@output[/url] : None.
* [url=home.php?mod=space&uid=266161]@return[/url] : None.
* @Author&Data : MrShuCai 2019.4.11.
*******************************************************************************/
void UART_Init(void)
{
gsUARTBuff.CheckType = NONE;
gsUARTBuff.UartMaxLength = Uartlength;
gsUARTBuff.UartStat = COM_NONE_BIT_DEAL;
UART_GPIO_Init();
if(BaudRate == 1200)
{
memcpy(TimeSet, &TimeSetBuff[0][0], sizeof(TimeSet));
}
else if(BaudRate == 2400)
{
memcpy(TimeSet, &TimeSetBuff[1][0], sizeof(TimeSet));
}
else if(BaudRate == 4800)
{
memcpy(TimeSet, &TimeSetBuff[2][0], sizeof(TimeSet));
}
else if(BaudRate == 9600)
{
memcpy(TimeSet, &TimeSetBuff[3][0], sizeof(TimeSet));
}
else
{
}
MX_TIM6_Init();
}
/*******************************************************************************
* @FunctionName : UART_Send_Data.
* @Description : 模拟串口发送数据接口.
* @Input : None.
* @Output : None.
* @Return : None.
* @Author&Data : MrShuCai 2019.4.11.
*******************************************************************************/
void UART_Send_Data(uint8_t * data, uint8_t size)
{
gsUARTBuff.Sendlength = size;
memcpy(gsUARTBuff.UART_Send_buf, data, size);
if(gsUARTBuff.UartStat == COM_NONE_BIT_DEAL)
{
gsUARTBuff.TxEn = 1;
gsUARTBuff.RxEn = 0;
gsUARTBuff.UartStat = COM_START_BIT_DEAL;
TIM6->ARR = TimeSet[TimeSendStep];
TIM6->EGR = TIM_EGR_UG;
HAL_TIM_Base_Start_IT(&htim6);
}
}
/*******************************************************************************
* @FunctionName : EXTI4_15_IRQHandler.
* @Description : 接收引脚外部中断，下降沿触发，触发后即进入起始位判断.
* @Input : None.
* @Output : None.
* @Return : None.
* @Author&Data : MrShuCai 2019.4.11.
*******************************************************************************/
void EXTI4_15_IRQHandler(void)
{
if(__HAL_GPIO_EXTI_GET_IT(GPIO_PIN_4) != RESET)
{
__HAL_GPIO_EXTI_CLEAR_IT(GPIO_PIN_4);
if(gsUARTBuff.UartStat == COM_NONE_BIT_DEAL)
{
gsUARTBuff.RxEn = 1;
ucRecvData = 0;
gsUARTBuff.UartStat = COM_START_BIT_DEAL;
TIM6->ARR = TimeSet[TimeRecvStartStep1];
TIM6->EGR = TIM_EGR_UG; //初始化定时器
EXTI->IMR &= ~(0x10);
EXTI->EMR &= ~(0x10);
HAL_TIM_Base_Start_IT(&htim6);
}
}
}
/*******************************************************************************
* @FunctionName : BitValueChk.
* @Description : 判断采集bit值，三次中为1的次数大于等于2则值为1否则为0.
* @Input : n 采集记录的位值.
* @Output : BitValue.
* @Return : BitValue.
* @Author&Data : MrShuCai 2019.5.1.
*******************************************************************************/
uint8_t BitValueChk(uint8_t n)
{
uint8_t BitValCx = 0;
for(BitValCx = 0; n; n >>= 1)
{
BitValCx += n & 0x01;
}
return (BitValCx < 2) ? (0) : (1);
}
/*******************************************************************************
* @FunctionName : TIM6_IRQHandler.
* @Description : 中断处理函数，包括发送和接收两部分.
* @Input : None.
* @Output : None.
* @Return : None.
* @Author&Data : MrShuCai 2019.4.11.
*******************************************************************************/
void TIM6_IRQHandler(void)
{
HAL_TIM_IRQHandler(&htim6);
if(gsUARTBuff.TxEn == 1) /*数据发送，发送优先，无发送后才进入接收状态*/
{
switch(gsUARTBuff.UartStat) /*串口发送位状态判断*/
{
case COM_START_BIT_DEAL :
{
HAL_GPIO_WritePin(COM_TX_GPIO_Port, COM_TX_Pin, GPIO_PIN_RESET);
gsUARTBuff.UartStat = COM_DATA_BIT_DEAL;
ucSendBitCx = 0;
}
break;
case COM_DATA_BIT_DEAL :
{
HAL_GPIO_WritePin(COM_TX_GPIO_Port, COM_TX_Pin, (GPIO_PinState)((gsUARTBuff.UART_Send_buf[ucSendLengCx] >> ucSendBitCx) & 0x01));
ucSendBitCx ++;
if(ucSendBitCx >= 8)
{
if(gsUARTBuff.CheckType == NONE)
{
gsUARTBuff.UartStat = COM_STOP_BIT_DEAL;
}
else
{
gsUARTBuff.UartStat = COM_CHECK_BIT_DEAL;
}
}
}
break;
case COM_CHECK_BIT_DEAL :
{
}
break;
case COM_STOP_BIT_DEAL :
{
HAL_GPIO_WritePin(COM_TX_GPIO_Port, COM_TX_Pin, GPIO_PIN_SET);
ucSendBitCx = 0;
if(ucSendLengCx < gsUARTBuff.Sendlength - 1)
{
gsUARTBuff.UartStat = COM_START_BIT_DEAL;
ucSendLengCx ++;
}
else
{
ucSendLengCx = 0;
gsUARTBuff.UartStat = COM_NONE_BIT_DEAL;
gsUARTBuff.TxEn = 0;
gsUARTBuff.RxEn = 1;
HAL_TIM_Base_Stop_IT(&htim6);
EXTI->IMR |= 0x10;
EXTI->EMR |= 0x10;
TIM6 ->CNT = 0;
}
}
break;
default:
break;
}
}
if(gsUARTBuff.RxEn == 1)
{
switch(gsUARTBuff.UartStat)
{
case COM_START_BIT_DEAL :
{
ucRecvBitBuff = (ucRecvBitBuff << 1) | (HAL_GPIO_ReadPin(COM_RX_GPIO_Port, COM_RX_Pin) & 0x01);
if(++ ucAcquCx >= 3)
{
if(BitValueChk(ucRecvBitBuff) == 0)
{
gsUARTBuff.UartStat = COM_DATA_BIT_DEAL;
TIM6->ARR = TimeSet[ucAcquCx];
}
else
{
gsUARTBuff.UartStat = COM_STOP_BIT_DEAL;
}
ucRecvBitBuff = 0;
ucAcquCx = 0;
}
else
{
TIM6->ARR = TimeSet[ucAcquCx];
}
}
break;
case COM_DATA_BIT_DEAL : //数据位
{
ucRecvBitBuff = (ucRecvBitBuff << 1) | (HAL_GPIO_ReadPin(COM_RX_GPIO_Port, COM_RX_Pin) & 0x01);
if(++ ucAcquCx >= 3)
{
ucRecvData |= (BitValueChk(ucRecvBitBuff) & 0x01) << ucRecvBitCx;
if(ucRecvBitCx >= 7)
{
ucRecvBitCx = 0;
if(gsUARTBuff.CheckType == NONE)
{
gsUARTBuff.UartStat = COM_STOP_BIT_DEAL;
}
else
{
gsUARTBuff.UartStat = COM_CHECK_BIT_DEAL;
}
}
else
{
ucRecvBitCx ++;
}
TIM6->ARR = TimeSet[ucAcquCx];
ucAcquCx = 0;
ucRecvBitBuff = 0;
}
else
{
TIM6->ARR = TimeSet[ucAcquCx];
}
}
break;
case COM_CHECK_BIT_DEAL : //校验位
{
}
break;
case COM_STOP_BIT_DEAL : //停止位
{
ucRecvBitBuff = (ucRecvBitBuff << 1) | (HAL_GPIO_ReadPin(COM_RX_GPIO_Port, COM_RX_Pin) & 0x01);
if( ++ ucAcquCx >= 3)
{
if(BitValueChk(ucRecvBitBuff) == 1)
{
if(gsUARTBuff.Recvlength < gsUARTBuff.UartMaxLength)
{
gsUARTBuff.UART_Recv_buf[gsUARTBuff.Recvlength] = ucRecvData;
gsUARTBuff.Recvlength ++;
}
gsUARTBuff.UartStat = COM_NONE_BIT_DEAL;
HAL_TIM_Base_Stop_IT(&htim6);
EXTI->IMR |= 0x10;
EXTI->EMR |= 0x10;
TIM6->CNT = 0;
}
else
{
ucAcquCx = 0;
}
ucRecvBitBuff = 0;
ucAcquCx = 0;
}
else
{
TIM6->ARR = TimeSet[ucAcquCx];
}
}
break;
default:
break;
}
}
}
楼主
标题置顶
标题高亮
