S32KのトピックRe: Transmit FlexCAN S32K148

Transmit FlexCAN S32K148

faress_mansouri — Fri, 05 Jun 2020 06:40:28 GMT

How can i transmit a table of int8_t elements without using any SDK ?

Example : i want to send a table (8bytes) in this forme :Int8_t tab[] = {1,2,3,4,5,6,7,8}

what should i put in my MBs payload fields ?

CAN0->RAMn[ 0*MSG_BUF_SIZE + 2] = ???? /* MB0 word 2: data word 0 */
CAN0->RAMn[ 0*MSG_BUF_SIZE + 3] = ???? /* MB0 word 3: data word 1 */

CAN0->RAMn[ 0*MSG_BUF_SIZE + 1] = ID /* MB0 word 1: Tx msg with STD ID 0x511 */
CAN0->RAMn[ 0*MSG_BUF_SIZE + 0] = configuration /* MB0 word 0: */

PetrS — Fri, 05 Jun 2020 15:48:26 GMT

Hi,

upi can use

CAN0->RAMn[ 0*MSG_BUF_SIZE + 2] = tab[0]<<24|tab[1]<<16|tab[2]<<8|tab[3];
CAN0->RAMn[ 0*MSG_BUF_SIZE + 3] = tab[4]<<24|tab[5]<<16|tab[6]<<8|tab[7];

or with the help of pointer

uint8_t i,j,*pMB;
pMB = &CAN0->RAMn[ 0*MSG_BUF_SIZE + 2];
for(j=0;j<2;j++)
for(i=0;i<4;i++) *pMB++ = tab[4*j+3-i];

BR, Petr

faress_mansouri — Sat, 06 Jun 2020 20:11:03 GMT

Thanks for your help