I am using Picozed 7030 SoM and have enabled the CAN0 via MIO pins. Also on the carrier board there is CAN translator and then I have connected it to PEAK PCAN-USB pro. How to configure the can bitrate in SDK? As per the CAN's PG, it shows BRPR & bit timing calculation but what how to calculate the bitrate? What should be the CAN CLK selected in Zynq PS settings.
I tried setting BRPR =6, TS1 = 12, TS2 = 1, SJW = 0 (1 less for TS1, TS2, SJW as per product guide) for 250Kbps speed at 24MHz and have selected in PCAN view also the same settings (24MHz & 250Kbps). Are these values correct? How to calculate bitrate depending on clock, prescalar and time segment values.
/* The Baud Rate Prescaler Register (BRPR) and Bit Timing Register (BTR) required * to be set for the desired baud rate. * For more information see the CAN 2.0A, CAN 2.0B, ISO 11898-1 specifications. * The CAN clock is 24MHz. */ #define TEST_BTR_SYNCJUMPWIDTH 3 // 100, 250 -> 3 #define TEST_BTR_SECOND_TIMESEGMENT 2 // 100, 250 -> 5 500 -> 2 #define TEST_BTR_FIRST_TIMESEGMENT 3 // 100, 250 -> 8 500 -> 3 #define TEST_BRPR_BAUD_PRESCALAR 2 // 100->14 250,500->5 750->3, 1000->2