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start adding U[S]ART support (need DMA)

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Edward Emelianov
2026-02-14 00:57:13 +03:00
parent 148c25b555
commit 26e74a6b89
9 changed files with 324 additions and 20 deletions
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32
F3:F303/InterfaceBoard/Readme.md
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@@ -38,7 +38,7 @@ Inner USB interfaces (IFx):
| 12 | (VREF-) | | | |
| 13 | (VREF+) | | | |
| 14 | PA0 | NC | | |
| 15 | PA1 | USART2 DE | AF7 | RS-485 (3) DE |
| 15 | PA1 | USART2 DE | AF7 or PP | RS-485 (3) DE |
| 16 | PA2 | USART2 TX | AF7 | RS-485 (3) Tx |
| 17 | PA3 | USART2 RX | AF7 | RS-485 (3) Rx |
| 18 | PF4 | NC | | |
@@ -58,7 +58,7 @@ Inner USB interfaces (IFx):
| 32 | (VDD) | | | |
| 33 | PB12 | NC | | |
| 34 | PB13 | NC | | |
| 35 | PB14 | USART3 DE | AF7 | RS-485 (1) DE |
| 35 | PB14 | USART3 DE | AF7 or PP | RS-485 (1) DE |
| 36 | PB15 | | | |
| 37 | PC6 | NC | | |
| 38 | PC7 | NC | | |
@@ -91,5 +91,33 @@ Inner USB interfaces (IFx):
### Some comments.
Interfaces:
- IF1: RS-485 over USART3.
- IF2: RS-485 over USART1.
- IF3: RS-485 over USART2.
- IF4: RS-232 over UART4.
- IF5: RS-232 or RS-422 (by jumpers "IF5" and "SSI") over UART5.
- IF6: CAN bus.
- IF7: SSI (inaccessible when RS-422 selected) or interface for device configuration (if jumper "Config mode" is opened when device started").
DMA1 channels:
- Ch2: USART3_Tx
- Ch3: USART3_Rx
- Ch4: USART1_Tx
- Ch5: USART1_Rx
- Ch6: USART2_Rx
- Ch7: USART2_Tx
DMA2 channels:
- Ch3: UART4_Rx
- Ch5: UART4_Tx
UART5 have no DMA channels, so used in interrupts.
### Sorted by ports (with AF numbers).