m0516串口接收中断里不能单个发送，至少发送两个！

只看该作者 · 2012-8-9 11:13

本帖最后由 hotpower 于 2012-9-13 22:38 编辑

调试M0516的串口程序，用的串口0，发送没用中断，接收用中断，从电脑里接收一个字符再把接收到的数据发送上去，能够接收但是发送的时候至少要发两个字节才行，发一个就不行，调试了一天依然找不到原因，还请做过的大虾帮忙！

只看该作者 · 2012-8-9 11:21

附上程序，程序也是我根据例程改的
#include <stdio.h>
#include "M051Series.h"

#define PLLCON_SETTING    SYSCLK_PLLCON_50MHz_XTAL
#define PLL_CLOCK          50000000

/*---------------------------------------------------------------------------------------------------------*/
/* Define functions prototype                                                                            */
/*---------------------------------------------------------------------------------------------------------*/
int32_t main(void);

void Delay(int32_t time)
{
  while(time--)
  {
;
  }
}

void SYS_Init(void)
{
/*---------------------------------------------------------------------------------------------------------*/
/* Init System Clock                                                                                     */
/*---------------------------------------------------------------------------------------------------------*/

/* Unlock protected registers */
SYS_UnlockReg();

/* Enable external 12MHz XTAL */
SYSCLK->PWRCON |= SYSCLK_PWRCON_XTL12M_EN_Msk;

SYSCLK->PLLCON = PLLCON_SETTING;

/* Waiting for clock ready */
SYS_WaitingForClockReady(SYSCLK_CLKSTATUS_PLL_STB_Msk | SYSCLK_CLKSTATUS_XTL12M_STB_Msk);

/* Switch HCLK clock source to PLL */
SYSCLK->CLKSEL0 = SYSCLK_CLKSEL0_HCLK_PLL;

/* Enable IP clock */
SYSCLK->APBCLK = SYSCLK_APBCLK_UART0_EN_Msk | SYSCLK_APBCLK_UART1_EN_Msk;

/* IP clock source */
SYSCLK->CLKSEL1 = SYSCLK_CLKSEL1_UART_PLL ;

/* Update System Core Clock */
/* User can use SystemCoreClockUpdate() to calculate PllClock, SystemCoreClock and CycylesPerUs automatically. */
//SystemCoreClockUpdate();
PllClock       = PLL_CLOCK;          // PLL
SystemCoreClock = PLL_CLOCK / 1;       // HCLK
CyclesPerUs    = PLL_CLOCK / 1000000;  // For SYS_SysTickDelay()

/*---------------------------------------------------------------------------------------------------------*/
/* Init I/O Multi-function                                                                               */
/*---------------------------------------------------------------------------------------------------------*/
/* Set P3 multi-function pins for UART0 RXD and TXD  */
SYS->P3_MFP = SYS_MFP_P30_RXD0 | SYS_MFP_P31_TXD0;

/* Set P1 multi-function pins for UART1 RXD and TXD  */
SYS->P1_MFP = SYS_MFP_P12_RXD1 | SYS_MFP_P13_TXD1;

/* Set P0 multi-function pins for UART1 RTS and CTS */
SYS->P0_MFP = SYS_MFP_P01_RTS1 | SYS_MFP_P00_CTS1;

/* Lock protected registers */
SYS_LockReg();
}

void UART0_Init()
{
/*---------------------------------------------------------------------------------------------------------*/
/* Init UART                                                                                              */
/*---------------------------------------------------------------------------------------------------------*/
UART0->BAUD = UART_BAUD_MODE2 | UART_BAUD_DIV_MODE2(PLL_CLOCK,115200);

_UART_SET_DATA_FORMAT(UART0, UART_WORD_LEN_8 | UART_PARITY_NONE | UART_STOP_BIT_1);
}

/*---------------------------------------------------------------------------------------------------------*/
/* UART Test Sample                                                                                     */
/* Test Item                                                                                              */
/* It sends the received data to HyperTerminal.                                                          */
/*---------------------------------------------------------------------------------------------------------*/

/*---------------------------------------------------------------------------------------------------------*/
/* MAIN function                                                                                        */
/*---------------------------------------------------------------------------------------------------------*/

int main(void)
{
   /* Init System, IP clock and multi-function I/O */
SYS_Init();
/* Init UART0 for printf */
UART0_Init();
/* Init UART1 for testing */

/*---------------------------------------------------------------------------------------------------------*/
/* SAMPLE CODE                                                                                           */
/*---------------------------------------------------------------------------------------------------------*/
// _UART_ENABLE_INT(UART0, (UART_IER_RDA_IEN_Msk | UART_IER_THRE_IEN_Msk | UART_IER_RTO_IEN_Msk));

_UART_ENABLE_INT(UART0, UART_IER_RDA_IEN_Msk);
NVIC_EnableIRQ(UART0_IRQn);
while(1)
{
   ;
}

}

/*---------------------------------------------------------------------------------------------------------*/
/* ISR to handle UART Channel 0 interrupt event                                                          */
/*---------------------------------------------------------------------------------------------------------*/
void UART0_IRQHandler(void)
{
uint8_t u8InChar=0xFF;
uint32_t u32IntSts= UART0->ISR;

if(u32IntSts & UART_ISR_RDA_INT_Msk)
{
      /* Get all the input characters */
      while(_UART_IS_RX_READY(UART0))
      {

      while(_UART_IS_RX_FULL(UART0))
      {
         ;
      }
         /* Get the character from UART Buffer */
         _UART_RECEIVEBYTE(UART0,u8InChar);          /* Rx trigger level is 1 byte*/
         _UART_SENDBYTE(UART0,u8InChar);
         _UART_WAIT_TX_EMPTY(UART0);
      }

}

}