LPC1788學(xué)習(xí)之串口學(xué)習(xí)-寄存器操作

接收數(shù)據(jù)使用中斷接收---發(fā)送暫時是直接發(fā)送--簡單的寄存器操作-記下不忘記！

#include "uart_lpc1788.h"


uint32_t Receive_Sign; //接收數(shù)據(jù)下標(biāo)--接收數(shù)據(jù)個數(shù)
uint8_t Receive_Buf[UART_RING_BUFSIZE]; //接收數(shù)組


/*-----------------------串口0初始化------------------*/
void Uart0_Init(uint32_t clk, uint32_t baudrate)
{
uint32_t tmp;
uint16_t divisorInt;


LPC_IOCON->P0_2=0X21;
LPC_IOCON->P0_3=0X21;


LPC_SC->PCONP |= (1<<3); //外設(shè)時鐘使能
//---------------------------------------------
LPC_UART0->FCR=0X07;
LPC_UART0->FCR=0X00;
while (LPC_UART0->LSR & 0X01)
{
tmp = LPC_UART0->RBR; //假讀取去清空
}
LPC_UART0->TER = 0x80;
while (!(LPC_UART0->LSR & 0x20));
LPC_UART0->TER = 0;
LPC_UART0->IER = 0;
LPC_UART0->LCR = 0;
LPC_UART0->ACR = 0;
LPC_UART0->RS485CTRL = 0;
LPC_UART0->RS485DLY = 0;
LPC_UART0->ADRMATCH = 0;
tmp = LPC_UART0->LSR; //獲取線狀態(tài)寄存器
//-------------------------------------
divisorInt =Uart0GetDivisorByBaudrate(clk,baudrate);
LPC_UART0->LCR |= 0x80; //使能訪問除數(shù)寄存器

LPC_UART0->DLM = (divisorInt>>8) & 0xFF;
LPC_UART0->DLL = divisorInt & 0xFF;


LPC_UART0->LCR &= (~0x80) & 0xFF; //禁止訪問
//------------------------------------------
tmp = (LPC_UART0->LCR & (0x80 | 0x40)) & 0xFF;
tmp |= 0x03; //8位數(shù)據(jù)-1個停止位-禁止奇偶校驗
LPC_UART0->LCR = (uint8_t)(tmp & 0xFF);
//----------------------------------------------
tmp=0;
tmp |= 0x01; //使能FIFO
tmp |= 0x00; //觸發(fā)點0-一個字符觸發(fā)中斷
tmp |= 0x04; //發(fā)送緩存
tmp |= 0x02; //接收緩存
LPC_UART0->FCR = tmp & 0xFF;
//------------------------------------------------
LPC_UART0->TER |= 0x80;//發(fā)送使能


LPC_UART0->IER|= 0x01& 0x307; //使能RD數(shù)據(jù)接收中斷
LPC_UART0->IER|= 0x04& 0x307; //使能RX線狀態(tài)中斷
//----------------------------------------------------
Receive_Sign=0;
//--------------------------------------
NVIC_SetPriority(UART0_IRQn, ((0x01<<3)|0x01));
NVIC_EnableIRQ(UART0_IRQn);
}
/*-------------------串口0中斷函數(shù)----------------------*/
voidUART0_IRQHandler(void)
{
uint32_t tmp, tmp1;


tmp = ((LPC_UART0->IIR) & 0x3CF) & (7<<1); //獲取中斷標(biāo)識


if (tmp == (3<<1)) //線狀態(tài)中斷
{
tmp1 = ((LPC_UART0->LSR) & 0xFF);
tmp1 &= ((1<<1) | (1<<2) | (1<<3)| (1<<4) | (1<<7));
if (tmp1) //有錯誤
{
while (1){}
}
}
if ((tmp == (2<<1)) || (tmp == (6<<1)))//接收數(shù)據(jù)中斷--超時中斷
{
Receive_Buf[Receive_Sign]= (LPC_UART0->RBR & 0xFF); //讀取數(shù)據(jù)
Receive_Sign++;
}
if (tmp == (1<<1))//THRE發(fā)送中斷
{
//UART_IntTransmit();//發(fā)送數(shù)據(jù)--未使用
}
}
/*-----------發(fā)送指定數(shù)組----------------*/
void UART0_SendStr(uint8_t *txbuf)
{
uint8_t *pChar = txbuf;


while(*pChar!='