ecan初始化失败
时间:10-02
整理:3721RD
点击:
基于28235;初始化时在while(ECanaShadow.CANES.bit.CCE != 0)处陷入死循环;时钟已打开;系统时钟
25MHz;哪位大侠帮分析一下原因,感激不尽!代码如下:
void InitECana(void)
{
struct ECAN_REGS ECanaShadow;
EALLOW; // EALLOW enables access to protected bits
/* Configure eCAN RX and TX pins for CAN operation using eCAN regs*/
ECanaShadow.CANTIOC.all = ECanaRegs.CANTIOC.all;
ECanaShadow.CANTIOC.bit.TXFUNC = 1;
ECanaRegs.CANTIOC.all = ECanaShadow.CANTIOC.all;
ECanaShadow.CANRIOC.all = ECanaRegs.CANRIOC.all;
ECanaShadow.CANRIOC.bit.RXFUNC = 1;
ECanaRegs.CANRIOC.all = ECanaShadow.CANRIOC.all;
/* Configure eCAN for HECC mode - (reqd to access mailboxes 16 thru 31) */
// HECC mode also enables time-stamping feature
ECanaRegs.CANME.all = 0;
ECanaShadow.CANMC.all = ECanaRegs.CANMC.all;
ECanaShadow.CANMC.bit.SCB = 1;
ECanaRegs.CANMC.all = ECanaShadow.CANMC.all;
/* Initialize all bits of 'Master Control Field' to zero */
// Some bits of MSGCTRL register come up in an unknown state. For proper operation,
// all bits (including reserved bits) of MSGCTRL must be initialized to zero
ECanaMboxes.MBOX0.MSGCTRL.all = 0x00000000;
ECanaMboxes.MBOX1.MSGCTRL.all = 0x00000000;
ECanaMboxes.MBOX2.MSGCTRL.all = 0x00000000;
ECanaMboxes.MBOX3.MSGCTRL.all = 0x00000000;
ECanaMboxes.MBOX4.MSGCTRL.all = 0x00000000;
ECanaMboxes.MBOX5.MSGCTRL.all = 0x00000000;
ECanaMboxes.MBOX6.MSGCTRL.all = 0x00000000;
ECanaMboxes.MBOX7.MSGCTRL.all = 0x00000000;
ECanaMboxes.MBOX8.MSGCTRL.all = 0x00000000;
ECanaMboxes.MBOX9.MSGCTRL.all = 0x00000000;
ECanaMboxes.MBOX10.MSGCTRL.all = 0x00000000;
ECanaMboxes.MBOX11.MSGCTRL.all = 0x00000000;
ECanaMboxes.MBOX12.MSGCTRL.all = 0x00000000;
ECanaMboxes.MBOX13.MSGCTRL.all = 0x00000000;
ECanaMboxes.MBOX14.MSGCTRL.all = 0x00000000;
ECanaMboxes.MBOX15.MSGCTRL.all = 0x00000000;
// TAn, RMPn, GIFn bits are all zero upon reset and are cleared again
// as a matter of precaution.
ECanaRegs.CANTA.all = 0xFFFFFFFF; /* Clear all TAn bits */
ECanaRegs.CANRMP.all = 0xFFFFFFFF; /* Clear all RMPn bits */
ECanaRegs.CANGIF0.all = 0xFFFFFFFF; /* Clear all interrupt flag bits */
ECanaRegs.CANGIF1.all = 0xFFFFFFFF;
//ECanaRegs.CANMIM.all = 0xFFFFFFFF;
/* Configure bit timing parameters for eCANA*/
ECanaShadow.CANMC.all = ECanaRegs.CANMC.all;
ECanaShadow.CANMC.bit.CCR = 1; // Set CCR = 1
ECanaRegs.CANMC.all = ECanaShadow.CANMC.all;
EDIS;
ECanaShadow.CANES.all = ECanaRegs.CANES.all;
{
ECanaShadow.CANES.all = ECanaRegs.CANES.all;
} while(ECanaShadow.CANES.bit.CCE != 1); // Wait for CCE bit to be set..
EALLOW;
ECanaShadow.CANBTC.all = 0;
ECanaShadow.CANBTC.bit.BRPREG = 4;
ECanaShadow.CANBTC.bit.TSEG2REG = 1;
ECanaShadow.CANBTC.bit.TSEG1REG = 6;
#endif
//ECanaShadow.CANBTC.bit.SJWREG = 2;
//ECanaShadow.CANBTC.bit.SAM = 1;
ECanaShadow.CANBTC.bit.SAM = 1;
ECanaRegs.CANBTC.all = ECanaShadow.CANBTC.all;
ECanaShadow.CANMC.all = ECanaRegs.CANMC.all; //把CANMC读入影子寄存器
ECanaShadow.CANMC.bit.CCR = 0; //改变配置请求位
ECanaRegs.CANMC.all = ECanaShadow.CANMC.all; //把配置好的寄存器值回写
ECanaShadow.CANES.all = ECanaRegs.CANES.all;
EDIS;
do
{
ECanaShadow.CANES.all = ECanaRegs.CANES.all;
} while(ECanaShadow.CANES.bit.CCE != 0);
/* Disable all Mailboxes */
ECanaRegs.CANME.all = 0;
}
25MHz;哪位大侠帮分析一下原因,感激不尽!代码如下:
void InitECana(void)
{
struct ECAN_REGS ECanaShadow;
EALLOW; // EALLOW enables access to protected bits
/* Configure eCAN RX and TX pins for CAN operation using eCAN regs*/
ECanaShadow.CANTIOC.all = ECanaRegs.CANTIOC.all;
ECanaShadow.CANTIOC.bit.TXFUNC = 1;
ECanaRegs.CANTIOC.all = ECanaShadow.CANTIOC.all;
ECanaShadow.CANRIOC.all = ECanaRegs.CANRIOC.all;
ECanaShadow.CANRIOC.bit.RXFUNC = 1;
ECanaRegs.CANRIOC.all = ECanaShadow.CANRIOC.all;
/* Configure eCAN for HECC mode - (reqd to access mailboxes 16 thru 31) */
// HECC mode also enables time-stamping feature
ECanaRegs.CANME.all = 0;
ECanaShadow.CANMC.all = ECanaRegs.CANMC.all;
ECanaShadow.CANMC.bit.SCB = 1;
ECanaRegs.CANMC.all = ECanaShadow.CANMC.all;
/* Initialize all bits of 'Master Control Field' to zero */
// Some bits of MSGCTRL register come up in an unknown state. For proper operation,
// all bits (including reserved bits) of MSGCTRL must be initialized to zero
ECanaMboxes.MBOX0.MSGCTRL.all = 0x00000000;
ECanaMboxes.MBOX1.MSGCTRL.all = 0x00000000;
ECanaMboxes.MBOX2.MSGCTRL.all = 0x00000000;
ECanaMboxes.MBOX3.MSGCTRL.all = 0x00000000;
ECanaMboxes.MBOX4.MSGCTRL.all = 0x00000000;
ECanaMboxes.MBOX5.MSGCTRL.all = 0x00000000;
ECanaMboxes.MBOX6.MSGCTRL.all = 0x00000000;
ECanaMboxes.MBOX7.MSGCTRL.all = 0x00000000;
ECanaMboxes.MBOX8.MSGCTRL.all = 0x00000000;
ECanaMboxes.MBOX9.MSGCTRL.all = 0x00000000;
ECanaMboxes.MBOX10.MSGCTRL.all = 0x00000000;
ECanaMboxes.MBOX11.MSGCTRL.all = 0x00000000;
ECanaMboxes.MBOX12.MSGCTRL.all = 0x00000000;
ECanaMboxes.MBOX13.MSGCTRL.all = 0x00000000;
ECanaMboxes.MBOX14.MSGCTRL.all = 0x00000000;
ECanaMboxes.MBOX15.MSGCTRL.all = 0x00000000;
// TAn, RMPn, GIFn bits are all zero upon reset and are cleared again
// as a matter of precaution.
ECanaRegs.CANTA.all = 0xFFFFFFFF; /* Clear all TAn bits */
ECanaRegs.CANRMP.all = 0xFFFFFFFF; /* Clear all RMPn bits */
ECanaRegs.CANGIF0.all = 0xFFFFFFFF; /* Clear all interrupt flag bits */
ECanaRegs.CANGIF1.all = 0xFFFFFFFF;
//ECanaRegs.CANMIM.all = 0xFFFFFFFF;
/* Configure bit timing parameters for eCANA*/
ECanaShadow.CANMC.all = ECanaRegs.CANMC.all;
ECanaShadow.CANMC.bit.CCR = 1; // Set CCR = 1
ECanaRegs.CANMC.all = ECanaShadow.CANMC.all;
EDIS;
ECanaShadow.CANES.all = ECanaRegs.CANES.all;
{
ECanaShadow.CANES.all = ECanaRegs.CANES.all;
} while(ECanaShadow.CANES.bit.CCE != 1); // Wait for CCE bit to be set..
EALLOW;
ECanaShadow.CANBTC.all = 0;
ECanaShadow.CANBTC.bit.BRPREG = 4;
ECanaShadow.CANBTC.bit.TSEG2REG = 1;
ECanaShadow.CANBTC.bit.TSEG1REG = 6;
#endif
//ECanaShadow.CANBTC.bit.SJWREG = 2;
//ECanaShadow.CANBTC.bit.SAM = 1;
ECanaShadow.CANBTC.bit.SAM = 1;
ECanaRegs.CANBTC.all = ECanaShadow.CANBTC.all;
ECanaShadow.CANMC.all = ECanaRegs.CANMC.all; //把CANMC读入影子寄存器
ECanaShadow.CANMC.bit.CCR = 0; //改变配置请求位
ECanaRegs.CANMC.all = ECanaShadow.CANMC.all; //把配置好的寄存器值回写
ECanaShadow.CANES.all = ECanaRegs.CANES.all;
EDIS;
do
{
ECanaShadow.CANES.all = ECanaRegs.CANES.all;
} while(ECanaShadow.CANES.bit.CCE != 0);
/* Disable all Mailboxes */
ECanaRegs.CANME.all = 0;
}
是基于28335
能帮解决的版友将提供现金红包奖励50rmb!
你是在仿真的时候出现,还是实际运行(不连仿真器)的情况下出现?
不连仿真器;我是用串口下载.hex文件,下载完之后程序不运行,注释掉以下语句程序可正常运行,但CAN未被成功初始化
do
{
ECanaShadow.CANES.all = ECanaRegs.CANES.all;
} while(ECanaShadow.CANES.bit.CCE != 0);
你看看ECanaRegs.CANES.all的值是多少,对应的ECanaShadow.CANES.bit.CCE位是否为0?
CCE未被置0,就是卡在这
悬赏人民币100,求解决方案
你看看于ECanaShadow.CANES相关的寄存器,看看是否有写保护控制寄存器?
我也遇到过这个问题,重新掉电就好了
我的重新掉电也不行;现在准备连上仿真器看看,估计作用不大