MSP430重啟/頻繁重啟/跑飛 原因分析

void send_basic_data_to_dis_part()

{

char basic_data_buf[60]={0};

char frame_head[2]={0xFE,0xFB},frame_end[2]={0xFE,0xFA};

char frame_len[1]={0x45},frame_type[1]={0x40};

char bCRC[2]={0,0};

char tower_num[1]={0x08};

unsigned int addr=0;

addr=split_joint_hex_data( basic_data_buf,addr,frame_head,2);

addr=split_joint_hex_data( basic_data_buf,addr,frame_len,1);

addr=split_joint_hex_data( basic_data_buf,addr,frame_type,1);

addr=split_joint_hex_data( basic_data_buf,addr,tower_num,1);

for(uint8 i=0;i

{

addr=split_joint_hex_data( basic_data_buf,addr,(char*)(&crane_tower[i].lcd_x),2);

addr=split_joint_hex_data( basic_data_buf,addr,(char*)(&crane_tower[i].lcd_y),2);

addr=split_joint_hex_data( basic_data_buf,addr,(char*)(&crane_tower[i].dis_fore_r),2);

addr=split_joint_hex_data( basic_data_buf,addr,(char*)(&crane_tower[i].dis_back_r),2);

}

CRC16(bCRC,basic_data_buf+2, addr-2); //數據CRC校驗

addr=split_joint_hex_data( basic_data_buf,addr,bCRC,2);

addr=split_joint_hex_data( basic_data_buf,addr,frame_end,2);

UART2_Send_Buf(basic_data_buf,addr);

}

//basic_data_buf[60]數組所開(kāi)辟的長(cháng)度為60，但是在下面從basic_data_buf首地址起填裝數據的過(guò)程當中，填寫(xiě)的數據長(cháng)度超過(guò)了60，數組越界，破壞了棧內保持的進(jìn)入send_basic_data_to_dis_part(）函數之前保存的現場(chǎng)數據，結果跳出該函數調用，要執行下步的時(shí)候，由于SP內的值已經(jīng)被修改，導致程序跑飛。（這種情況癥狀往往表現為：進(jìn)入某個(gè)函數內正常，在跳出的時(shí)候就跑飛，多為在函數內SP的指針被修改）