// =============================================================================
// 功能: 启动串口发送，其目的是触发中断，用中断方式发送数据。
// 参数: PrivateTag,被操作的串口设备指针数值.
// 返回: 发送的个数
// =============================================================================
static u32 __UART_SendStart (tagUartReg *Reg,u32 timeout)
{
u8 fifodep=1,num,ch[8],port;
switch((u32)Reg)
{
//UART0和UART1的FIFO深度为8，而其他的为1
case CN_UART0_BASE: port = CN_UART0; fifodep = 8; break;
case CN_UART1_BASE: port = CN_UART1; fifodep = 8; break;
case CN_UART2_BASE: port = CN_UART2; break;
case CN_UART3_BASE: port = CN_UART3; break;
case CN_UART4_BASE: port = CN_UART4; break;
case CN_UART5_BASE: port = CN_UART5; break;
default:return 0;
}
__UART_TxIntDisable(Reg);
if(__UART_TxTranEmpty(Reg))
{
fifodep = UART_PortRead(pUartCB[port],ch,fifodep,0);// UART的FIFO大小为8字节
for(num = 0; num < fifodep; num++)
{
Reg->D = ch[num];
}
}
__UART_TxIntEnable(Reg);
return num;
}
// =============================================================================
// 功能: 打印函数，直接写串口方式，目前主要由djy_printk独享，用于调试关键代码段
// 参数: 所需要发送的字符串，当然，前提是你提供的一定是字符串'\0'结束
// 返回: 发送的字节个数
// =============================================================================
u32 Uart_SendServiceDirectly(char *str)
{
u32 result=0,len,timeout=100*mS;
tagUartReg *Reg;
u32 BaseAddr,Port;
if(!strcmp(gc_pCfgStddevName,"UART0") && (sUartInited & (0x01 << CN_UART0)))
{
BaseAddr = CN_UART0_BASE;
Port = CN_UART0;
}
else if(!strcmp(gc_pCfgStddevName,"UART1")&& (sUartInited & (0x01 << CN_UART1)))
{
BaseAddr = CN_UART1_BASE;
Port = CN_UART1;
}
else if(!strcmp(gc_pCfgStddevName,"USART0")&& (sUartInited & (0x01 << CN_USART0)))
{
BaseAddr = CN_USART0_BASE;
Port = CN_USART0;
}
else if(!strcmp(gc_pCfgStddevName,"USART1")&& (sUartInited & (0x01 << CN_USART1)))
{
BaseAddr = CN_USART1_BASE;
Port = CN_USART1;
}
else
return 0;
len = strlen(str);
Reg = (tagUartReg *)BaseAddr;
__UART_SendIntDisable(Reg,s_UART_DmaUsed[Port]); //disable send INT
for(result=0; result < len; result ++)
{
// 超时或者发送缓冲为空时退出
while((false == __UART_TxTranEmpty(Reg))&& (timeout > 0))
{
timeout--;
Djy_DelayUs(1);
}
if(timeout == 0)
break;
Reg->UART_THR = str[result];
}
__UART_SendIntEnable(Reg,s_UART_DmaUsed[Port]); //enable send INT
return result;
}
// =============================================================================
// 功能：字符终端直接发送函数，采用轮询方式，直接写寄存器，用于printk，或者stdout
// 没有初始化
// 参数：str，发送字符串指针
// len，发送的字节数
// 返回：0，发生错误；result,发送数据长度，字节单位
// =============================================================================
s32 Uart_PutStrDirect(const char *str,u32 len)
{
u32 result = 0,timeout = TxByteTime * len;
u16 CR_Bak;
CR_Bak = GetCharDirectReg->C2; //Save INT
__UART_TxIntDisable(GetCharDirectReg); //disable send INT
for(result=0; result < len+1; result ++)
{
// 超时或者发送缓冲为空时退出
while((false == __UART_TxTranEmpty(PutStrDirectReg))&& (timeout > 10))
{
timeout -=10;
Djy_DelayUs(10);
}
if( (timeout <= 10) || (result == len))
break;
PutStrDirectReg->D = str[result];
}
PutStrDirectReg->C2 = CR_Bak; //restore send INT
return result;
}
// =============================================================================
// 功能: 使用中断方式效率能够大大提升软件执行效率；包括接收、发送和异常等，接收到数据
// 后，调用通用接口模块，写入软件缓冲区；发送数据时，调用通用接口模块，从软件缓
// 冲区读出数据，写入硬件发送寄存器；此外，根据芯片，可通过DMA方式发送
// 参数: 中断号.
// 返回: 0.
// =============================================================================
uint32_t UART_ISR(ufast_t IntLine)
{
static struct tagUartCB *UCB;
tagUartReg *Reg;
uint32_t timeout = 1000,num;
uint8_t ch,*puart_dma_send_buf,*puart_dma_recv_buf;
uint32_t IIR=0,Port,DmaBufLen,DmaRcvLen;
switch(IntLine)
{
case CN_INT_LINE_UART0:
Port = CN_UART0;
UCB = pUartCB[Port];
Reg = (tagUartReg *)CN_UART0_BASE;
DmaBufLen = UART0_DMA_BUF_LEN;
DmaRcvLen = s_UART0_DmaRcvLen;
puart_dma_send_buf = (uint8_t*)UART0_DmaSendBuf;
puart_dma_recv_buf = (uint8_t*)UART0_DmaRecvBuf;
break;
case CN_INT_LINE_UART1:
Port = CN_UART1;
UCB = pUartCB[Port];
Reg = (tagUartReg *)CN_UART1_BASE;
DmaBufLen = UART1_DMA_BUF_LEN;
DmaRcvLen = &s_UART1_DmaRcvLen;
puart_dma_send_buf = (uint8_t*)UART1_DmaSendBuf;
puart_dma_recv_buf = (uint8_t*)UART1_DmaRecvBuf;
break;
case CN_INT_LINE_USART0:
Port = CN_USART0;
UCB = pUartCB[Port];
Reg = (tagUartReg *)CN_UART1_BASE;
DmaBufLen = USART0_DMA_BUF_LEN;
DmaRcvLen = &s_USART0_DmaRcvLen;
puart_dma_send_buf = (uint8_t*)USART0_DmaSendBuf;
puart_dma_recv_buf = (uint8_t*)USART0_DmaRecvBuf;
break;
case CN_INT_LINE_USART1:
Port = CN_USART1;
UCB = pUartCB[Port];
Reg = (tagUartReg *)CN_UART1_BASE;
DmaBufLen = USART1_DMA_BUF_LEN;
DmaRcvLen = &s_USART1_DmaRcvLen;
puart_dma_send_buf = (uint8_t*)USART1_DmaSendBuf;
puart_dma_recv_buf = (uint8_t*)USART1_DmaRecvBuf;
break;
default:
return 0;
}
IIR = Reg->UART_SR;
if(s_UART_DmaUsed[Port] == cn_dma_unused)//非DMA方式发送和接收
{
if((IIR & (1<<0)) && (Reg->UART_IMR &(1<<0)))//rxrdy int
{
ch = Reg->UART_RHR;
num = UART_PortWrite(UCB,&ch,1,0);
if(num != 1)
{
UART_ErrHandle(UCB,CN_UART_BUF_OVER_ERR);
}
}
//tx empty int
if((IIR &(1<<9)) && (Reg->UART_IMR &(1<<9)))
{
num = UART_PortRead(UCB,&ch,1,0);
while((!__UART_TxTranEmpty(Reg)) && (timeout-- > 0));
if(num != 0)
Reg->UART_THR = ch;
else
{
__UART_SendIntDisable(Reg,s_UART_DmaUsed[Port]);
}
}
}
else //DMA方式发送和接收
{
if((IIR & (1<<3)) && (Reg->UART_IMR &(1<<3)))//endrx int
{
if(DmaRcvLen > DmaBufLen) //计算从DMA BUF中读多少数据
num = DmaBufLen;
else
num = DmaRcvLen;
UART_PortWrite(UCB,puart_dma_recv_buf,num,0);
DmaRcvLen = DmaRcvLen - num;
if(DmaRcvLen > DmaBufLen) //计算下次DMA接收数据量
Reg->UART_RCR = DmaBufLen;
else if(DmaRcvLen > 1)
Reg->UART_RCR = DmaRcvLen;
else //接收DMA最少为1
{
Reg->UART_RCR = 1;
DmaRcvLen = 1;
}
Reg->UART_RPR = (vu32)puart_dma_recv_buf;
}
if((IIR & (1<<11)) && (Reg->UART_IMR &(1<<11)))//txbufe int
{
while(!(Reg->UART_SR & (1<<9)));//wait for empty
num = UART_PortRead(UCB,puart_dma_send_buf, DmaBufLen,0);
if(num > 0)
{
Reg->UART_PTCR = (1<<9);//diable dma tx
if((Reg->UART_TCR==0)&&(Reg->UART_TNCR==0))
{
// num = UART_PortRead(UCB,puart_dma_send_buf,
// DmaBufLen,0);
Reg->UART_TPR = (uint32_t)puart_dma_send_buf;
Reg->UART_TCR = num;
}
Reg->UART_PTCR = (1<<8);//enable dma tx
}
else
{
//是否需禁止 dma tx int
while(!__UART_TxTranEmpty(Reg));
__UART_SendIntDisable(Reg,s_UART_DmaUsed[Port]);
}
}
}
if(IIR &(0xE0)) //其他中断
{
UART_ErrHandle(UCB,CN_UART_HARD_COMM_ERR);
}
return 0;
}
// =============================================================================
// 功能: 这个是直接写串口函数，不会经过事件弹出
// 参数: Reg,UART的寄存器基址.
// send_buf,被发送的缓冲数据
// len,发送的数据字节数
// timeout,超时时间，微秒
// 返回: 发送的个数
// =============================================================================
u32 __UART_SendDirectly(tagUartReg* Reg,u8 *send_buf,u32 len,u32 timeout)
{
u32 result,Port;
switch((u32)Reg)
{
//UART0和UART1的FIFO深度为8，而其他的为1
case CN_UART0_BASE:Port = CN_UART0; break;
case CN_UART1_BASE:Port = CN_UART1;break;
case CN_USART0_BASE:Port = CN_USART0;break;
case CN_USART1_BASE:Port = CN_USART1; break;
default:return 0;
}
__UART_SendIntDisable(Reg,s_UART_DmaUsed[Port]);
// __UART_half_duplex_send(Port);//硬件使能发送
if(s_UART_DmaUsed[Port] == false)
{
for(result=0; result < len; result ++)
{
while((0 == __UART_TxTranEmpty(Reg))
&& (timeout > 0))//超时或者发送缓冲为空时退出
{
timeout--;
Djy_DelayUs(1);
}
if(timeout == 0)
break;
Reg->UART_THR = send_buf[result];
}
// //等待发送完再将485通信转为接收
// while((0 == __UART_TxTranEmpty(Reg))
// && (timeout > 0))//超时或者发送缓冲为空时退出
// {
// timeout--;
// Djy_DelayUs(1);
// }
// if(timeout == 0)
// result = 0;
}
else
{
Reg->UART_PTCR = (1<<9);//disable dma send first
if((Reg->UART_TCR==0)&&(Reg->UART_TNCR==0))
{
Reg->UART_TPR = (uint32_t)send_buf;
Reg->UART_TCR = len;
Reg->UART_PTCR = (1<<8);//dma tx enbale
}
else
result = 0;
//直接发送方式，采用阻塞的DMA发送
while((!__UART_TxTranEmpty(Reg)) && (timeout > 0))
{
timeout--;
Djy_DelayUs(1);
}
if(timeout == 0)
result = 0;
}
__UART_SendIntEnable(Reg,s_UART_DmaUsed[Port]);
// __UART_half_duplex_recv(Port);//硬件使能接收
return result;
}
