Timeline for Difference between buffer and mailbox
Current License: CC BY-SA 3.0
15 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| May 25, 2016 at 14:24 | vote | accept | Ravi Teja Gudapati | ||
| May 25, 2016 at 13:47 | answer | added | Lundin | timeline score: 5 | |
| May 25, 2016 at 13:20 | comment | added | Lundin | It is quite common that the CAN controller does not have mailboxes. Also it is quite an over-simplification to say that "NXP LPC" has no mailboxes, "NXP LPC" could mean numerous completely different microcontrollers. For example LPC11C2x does have mailbox possibilities. | |
| May 25, 2016 at 12:19 | comment | added | AlphaGoku | Mailboxes are set based on id ranges. Buffers are general | |
| May 25, 2016 at 12:07 | comment | added | Ravi Teja Gudapati | What you describe as buffers for Tx are actually Mailbox buffers, i think. Its same as in other processors like STM32Fxxx, Renasas synergy, etc. | |
| May 25, 2016 at 11:45 | comment | added | AlphaGoku | It actually better to have Rx Mailboxes and Tx Buffers. TI's uC's have mailboxes for Tx and Rx(RMx series) | |
| May 25, 2016 at 11:43 | comment | added | AlphaGoku | Priority is done automatically based on id. You only need to make sure that a higher priority message is loaded with a lower id and vice versa. | |
| May 25, 2016 at 11:41 | comment | added | AlphaGoku | Even Tx can be done using only buffers(NXP LPC uses no TX mailboxes).You can however set priority among 3 Tx Buffers. | |
| May 25, 2016 at 11:38 | comment | added | Ravi Teja Gudapati | Oh. Rx can be done with FIFOs but Tx usually needs Mailbox because you would usually expect messages with higher priority ID to be sent out first and hence you can't have a FiFO and CAN controller needs a way to check which item has highest priority. | |
| May 25, 2016 at 11:36 | comment | added | AlphaGoku | NXP LPC series dont. They have Receive buffers | |
| May 25, 2016 at 11:29 | comment | added | Ravi Teja Gudapati | All CAN controllers usually have mailboxes. | |
| May 25, 2016 at 10:27 | comment | added | AlphaGoku | i guess u might have come across mailbox in a TI uC? | |
| May 25, 2016 at 10:25 | answer | added | jonvw | timeline score: 1 | |
| May 25, 2016 at 9:44 | review | First posts | |||
| May 25, 2016 at 10:27 | |||||
| May 25, 2016 at 9:43 | history | asked | Ravi Teja Gudapati | CC BY-SA 3.0 |