28069CAN TA置位问题

Xin Yao1

ECanaMboxes.MBOX0.MDL.all = *(Data + 1);
ECanaMboxes.MBOX0.MDH.all = *Data;

ECanaRegs.CANTRS.bit.TRS0 = 1;

while(ECanaRegs.CANTA.bit.TA0 == 0 ) {} // Wait for all TAn bits to be set..
ECanaRegs.CANTA.bit.TA0 = 1; // Clear all TAn

自检模式的时候可以置位可是正常工作的时候TA 一直在等待置位

TA位在什么情况下回置位啊，需要总线有节点接收到数据返回信号后才置位吗？还是说往总线上发送了数据，不管有没有节点接收到都会置位？

还有我外挂的can芯片是vp230，好像要求3.3v工作我测得工作电压只有3.1v 会有影响吗？

8 年多前

0 Seven Han 8 年多前

TI__Mastermind 43911 points

16.6.5 Transmission-Acknowledge Register (CANTA)
If the message of mailbox n was sent successfully, the bit TA[n] is set. This also sets the GMIF0/GMIF1(GIF0.15/GIF1.15) bit if the corresponding interrupt mask bit in the CANMIM register is set. TheGMIF0/GMIF1 bit initiates an interrupt.
The CPU resets the bits in CANTA by writing a 1. This also clears the interrupt if an interrupt has beengenerated. Writing a 0 has no effect. If the CPU tries to reset the bit while the CAN tries to set it, the bit isset. After power-up, all bits are cleared.

如果邮箱n中的消息已经发送成功，则TAn将置位。

CPU通过向TANTA中的位写1，使其复位。

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28069CAN TA置位问题