第一次使用SJA1000，寄存器读写已经ok了，但是在自测试模式下，发送数据了一直没有中断产生。下面是我的初始化代码：
RST1_ACTIVE;
// 200ns
DelayCPUClock(40);
Sleep(200);
RST1_INACTIVE;
Sleep(500);
// wait to enter reset mode
ucTemp = ReadSja1000REG(pSJA1000Head, REG_MODE);
while( (ucTemp&MODE_RM) != MODE_RM )
{
WriteSja1000REG(pSJA1000Head, REG_MODE, MODE_RM|MODE_AFM);
ucTemp = ReadSja1000REG(pSJA1000Head, REG_MODE);
}
// PeliCAN mode, CBP, disable CLKOUT
WriteSja1000REG(pSJA1000Head, REG_CDR, 0xC8);
// close all interrupt
WriteSja1000REG(pSJA1000Head, REG_IER, 0x00);
// allow all data
WriteSja1000REG(pSJA1000Head, REG_ACR0, 0x00);
WriteSja1000REG(pSJA1000Head, REG_ACR1, 0x00);
WriteSja1000REG(pSJA1000Head, REG_ACR2, 0x00);
WriteSja1000REG(pSJA1000Head, REG_ACR3, 0x00);
WriteSja1000REG(pSJA1000Head, REG_AMR0, 0xFF);
WriteSja1000REG(pSJA1000Head, REG_AMR1, 0xFF);
WriteSja1000REG(pSJA1000Head, REG_AMR2, 0xFF);
WriteSja1000REG(pSJA1000Head, REG_AMR3, 0xFF);
// set timing
WriteSja1000REG(pSJA1000Head, REG_BTR0, pSJA1000Head->BBTR0);
WriteSja1000REG(pSJA1000Head, REG_BTR1, pSJA1000Head->BBTR1);
// set output control
WriteSja1000REG(pSJA1000Head, REG_OCR, 0x1A);
//clear reg
WriteSja1000REG(pSJA1000Head, REG_RXERR, 0x00);
WriteSja1000REG(pSJA1000Head, REG_TXERR, 0x00);
WriteSja1000REG(pSJA1000Head, REG_RBSA, 0x00);
ReadSja1000REG(pSJA1000Head, REG_ECC);
for(i=0; i<32; i++)
{
ucTemp = ReadSja1000REG(pSJA1000Head, i);
RETAILMSG(1,(TEXT("sja1000 reg: %d -- 0x%x\r\n"),i,ucTemp));
}
// wait to enter work mode
ucTemp = ReadSja1000REG(pSJA1000Head, REG_MODE);
while( (ucTemp&MODE_RM) == MODE_RM )
{
WriteSja1000REG(pSJA1000Head, REG_MODE, MODE_AFM|MODE_STM); //test
ucTemp = ReadSja1000REG(pSJA1000Head, REG_MODE);
}
WriteSja1000REG(pSJA1000Head, REG_IER, IER_BEIE|IER_ALIE|IER_EPIE|IER_DOIE|IER_EIE|IER_RIE);
//release receive buffer
WriteSja1000REG(pSJA1000Head, REG_CMR, CMR_RRB);
发送数据的代码是：
RETAILMSG(1,(TEXT("DoTxData\r\n")));
ucStatus = ReadSja1000REG(pHWHead->pSJA1000Info, REG_SR);
while( (ucStatus&SR_TBS) != SR_TBS )
{
Sleep(5);
ucStatus = ReadSja1000REG(pHWHead->pSJA1000Info, REG_SR);
}
for(ucLoop=0; ucLoop<Len; ucLoop++)
{
WriteSja1000REG(pHWHead->pSJA1000Info, REG_TX_INFO+ucLoop, pBuf[ucLoop]);
}
ucTemp = ReadSja1000REG(pHWHead->pSJA1000Info, REG_IER);
ucTemp |= IER_TIE;
WriteSja1000REG(pHWHead->pSJA1000Info, REG_IER, ucTemp);
WriteSja1000REG(pHWHead->pSJA1000Info, REG_CMR, CMR_SRR|CMR_TR); //test
发送数据命令下发后，一直没有中断产生。
在初始化进入工作模式之前的读出来的寄存器值是：
sja1000 reg: 0 -- 0x1
sja1000 reg: 2 -- 0x3c
sja1000 reg: 6 -- 0x1c
sja1000 reg: 8 -- 0x1a
sja1000 reg: 13 -- 0x60
sja1000 reg: 20 -- 0xff
sja1000 reg: 21 -- 0xff
sja1000 reg: 22 -- 0xff
sja1000 reg: 23 -- 0xff
sja1000 reg: 31 -- 0xc8
其它都是0
下发发送数据的命令之后，读出来的寄存器值是：
sja1000 reg: 0 -- 0xc
sja1000 reg: 2 -- 0x30
sja1000 reg: 4 -- 0xef
sja1000 reg: 6 -- 0x1c
sja1000 reg: 8 -- 0x1a
sja1000 reg: 13 -- 0x60
sja1000 reg: 16 -- 0x6e
sja1000 reg: 17 -- 0xff
sja1000 reg: 18 -- 0xf8
sja1000 reg: 19 -- 0xff
sja1000 reg: 20 -- 0x0
sja1000 reg: 21 -- 0x1
sja1000 reg: 22 -- 0x80
sja1000 reg: 23 -- 0x3
sja1000 reg: 24 -- 0xfe
sja1000 reg: 25 -- 0xff
sja1000 reg: 26 -- 0xe7
sja1000 reg: 27 -- 0xdf
sja1000 reg: 31 -- 0xc8
其它都是0.
下发发送数据的命令之后，过了10秒钟，寄存器的值是：
sja1000 reg: 0 -- 0x21
sja1000 reg: 1 -- 0xff
sja1000 reg: 2 -- 0xc
sja1000 reg: 3 -- 0xe0
sja1000 reg: 4 -- 0x0
sja1000 reg: 5 -- 0xff
sja1000 reg: 6 -- 0x1c
sja1000 reg: 7 -- 0x0
sja1000 reg: 8 -- 0x1a
sja1000 reg: 9 -- 0x0
sja1000 reg: 10 -- 0xff
sja1000 reg: 11 -- 0xff
sja1000 reg: 12 -- 0xff
sja1000 reg: 13 -- 0xff
sja1000 reg: 14 -- 0xff
sja1000 reg: 15 -- 0xff
sja1000 reg: 16 -- 0xff
sja1000 reg: 17 -- 0xff
sja1000 reg: 18 -- 0xff
sja1000 reg: 19 -- 0xff
sja1000 reg: 20 -- 0x6e
sja1000 reg: 21 -- 0xff
sja1000 reg: 22 -- 0xf8
sja1000 reg: 23 -- 0xff
sja1000 reg: 24 -- 0x0
sja1000 reg: 25 -- 0x1
sja1000 reg: 26 -- 0x80
sja1000 reg: 27 -- 0x3
sja1000 reg: 28 -- 0xfe
sja1000 reg: 29 -- 0xff
sja1000 reg: 30 -- 0xff
sja1000 reg: 31 -- 0x0
居然回到了复位模式。
从回到工作模式和下发发送命令后，看起来寄存器的值都没什么问题，但是就是无法产生中断。奇怪啊。哪位热心人指点一下？
谢谢啦。 |
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