LPC Microcontrollers中的主题 Re: CAN Basic mode

CAN Basic mode

ianbenton — Thu, 08 Mar 2018 10:51:25 GMT

Section 27.7.2.4.4. of the LPC15xx manual states:

"The transmission of the contents of the
IF1 Registers is requested by writing the BUSY bit of the IF1 Command Request Register
to ‘1’."

Table 403 states that bit 15 (the BUSY bit) of IF1_CMDREQ is read-only.

Please clarify.

Re: CAN Basic mode

jeremyzhou — Tue, 13 Mar 2018 02:18:07 GMT

Hi Ian Benton,

Thank you for your interest in NXP Semiconductor products and

the opportunity to serve you.

You can use the following code to set the BUSY bit in the Command Request Register.

#define IFCREQ_BUSY    0x8000    /* 1 is writing is progress, cleared when 
LPC_CAN->IF2_CMDREQ = IFCREQ_BUSY;    /* Start message transfer */‍‍

Have a great day,

TIC

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Re: CAN Basic mode

ianbenton — Tue, 13 Mar 2018 09:06:16 GMT

That code writes to bit 15, which the manual says is read-only?

Re: CAN Basic mode

jeremyzhou — Wed, 20 Jun 2018 10:47:12 GMT

Hi Ian Benton,

It's typo with reference manual.

Hope this is clear.
Have a great day,
TIC

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