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Hi Expert,
I try to understand Message RAM Configuration in MCAN. Also, try to understand the setting from example code.
please help clarify few questions below.
from example, mcan_message_rx_tcan114x_LP_MSPM0G3507_nortos_ticlang
1. why TX buffer start address is 148? Filter starts from 0 and filter needs memory from 0-147?
2. follow previous question. Why i increase 1 "Number of Dedicated Transmit Buffers", end address increases 6( 6 32bit)? But the element size is 64 bytes.
3. Same question as above. If I increase\ decrease 1 from Number of RX FIFO0 Elements, End Address will increase\ decrease. but But the element size is 8 byte data field(2 32bits). As I know, it should be 2(R0+R1)+2(data field)=4,right?
4. from the code, start address is divided by 4. From TRM, it should be 32bits address. Why?
HW_WR_FIELD32(&mcan->MCANSS.MCAN.MCAN_RXF0C, MCAN_RXF0C_F0SA,
(msgRAMConfigParams->rxFIFO0startAddr >> 2U));
BR,
frank
Cash,
for 1, you mean that I can set TX MSG RAM address to 8 due to filter only use 2*4 = 8.
for 2, from trm, address increases with each section. So, end address should be relative element size, right?
BR,
frank
