[原创] 【LPC54100】双核协同工作NO.1点灯

ljj3166 2015-3-22 19:05 楼主

前面简单了解了一下双核的基本配置

以及双核间的通信

准备着手双核协同工作的一些内容了

简单设想了一下这次的方案：

M0产生一个随机数，共享给M4

M4读取这个随机数，并进行计算判断是否为偶数，并将结果通知M0

M0收到M4的计算判断结果后，，如果是，则点灯，如果不是，则灭灯

开搞，折腾了老半天，感觉LPCOpen的库有些很难描述的Bug，和c标准库之间的问题

有些时候会出现一些奇怪的现象，有空再复现一下，汇总起来

先上代码吧，很简单

M4侧：

#include "board.h"
#include <cr_section_macros.h>
#include "boot_multicore_slave.h"
#include <stdlib.h>
#include <stdio.h>
unsigned char cnt_m4;
static MBOX_IDX_T myCoreBox, otherCoreBox;
static void mutexTake(void)
{
while (Chip_MBOX_GetMutex(LPC_MBOX) == 0) {}
}
static void mutexGive(void)
{
Chip_MBOX_SetMutex(LPC_MBOX);
}
void MAILBOX_IRQHandler(void)
{
char pdata[20];
uint32_t sdata,temp;
uint32_t *p = (uint32_t *)Chip_MBOX_GetValue(LPC_MBOX, myCoreBox);
mutexTake();
itoa(*p,pdata,10);//获取M0的随机数
Board_UARTPutSTR("Core M4 get the randnum:");
Board_UARTPutSTR(pdata);Board_UARTPutSTR("\r\n");
Board_UARTPutSTR("Core M4 computed the result:");
temp = (*p)%2; //判断是否为偶数，是则sdata=1，否则sdata=0
if(temp==0){sdata = 1;Board_UARTPutSTR("LED ON");}
else{sdata = 0;Board_UARTPutSTR("LED OFF");}
Board_UARTPutSTR("\r\n");
Chip_MBOX_SetValue(LPC_MBOX, otherCoreBox, (uint32_t)&sdata);//把计算判断的结果返回给M0
Chip_MBOX_ClearValueBits(LPC_MBOX, myCoreBox, 0xFFFFFFFF);
mutexGive();
}
int main(void) {
SystemCoreClockUpdate();
Board_Init();
myCoreBox = MAILBOX_CM4;
otherCoreBox = MAILBOX_CM0PLUS;
Chip_MBOX_Init(LPC_MBOX);
mutexGive();
Board_UARTPutSTR("Core M4 boot......\r\n");
NVIC_EnableIRQ(MAILBOX_IRQn);
boot_multicore_slave();
volatile static int i = 0 ;
while(1) {
i++ ;
}
return 0 ;
}

M0侧：

#include "board.h"
#include <cr_section_macros.h>
#include "boot_multicore_slave.h"
#include <stdlib.h>
#include <stdio.h>
static void mutexTake(void)
{
while (Chip_MBOX_GetMutex(LPC_MBOX) == 0) {}
}
static void mutexGive(void)
{
Chip_MBOX_SetMutex(LPC_MBOX);
}
unsigned char cnt_m0;
static MBOX_IDX_T myCoreBox, otherCoreBox;
void MAILBOX_IRQHandler(void)
{
uint32_t *p = (uint32_t *)Chip_MBOX_GetValue(LPC_MBOX, myCoreBox);
mutexTake();
Board_UARTPutSTR("Core M0+ get the Result from M4,");
if(*p==1){Board_LED_Set(1,true);Board_UARTPutSTR("SET LED ON");} //获取M4计算判断的结果，并配置LED灯
else{Board_LED_Set(1,false);Board_UARTPutSTR("SET LED OFF");}
Board_UARTPutSTR("\r\n");
Chip_MBOX_ClearValueBits(LPC_MBOX, myCoreBox, 0xFFFFFFFF);
mutexGive();
}
int main(void) {
SystemCoreClockUpdate();
Board_Init();
myCoreBox = MAILBOX_CM0PLUS;
otherCoreBox = MAILBOX_CM4;
Chip_MBOX_Init(LPC_MBOX);
mutexGive();
Board_UARTPutSTR("Core M0+ boot......\r\n");
NVIC_EnableIRQ(MAILBOX_IRQn);
SysTick_Config(SystemCoreClock/10);
volatile static int i = 0 ;
while(1) {
i++ ;
}
return 0 ;
}
void SysTick_Handler(void) //每10个systick产生一个伪随机数，并发送给M4进行计算
{
char pdata[10];
int sdata;
cnt_m0++;
if(cnt_m0>=10)
{
mutexTake();
cnt_m0 = 0;
//sprintf(pdata,"Core M0+ make rand_num:%d\r\n",rand());
sdata = rand();
Board_UARTPutSTR("Core M0+ make the randnum:");Board_UARTPutSTR(itoa(sdata,pdata,10));Board_UARTPutSTR("\r\n");
Chip_MBOX_SetValue(LPC_MBOX, otherCoreBox, (uint32_t) &sdata);
Chip_MBOX_ClearValueBits(LPC_MBOX, myCoreBox, 0xFFFFFFFF);
mutexGive();
}
}