@CHIP-RTOS C Library V2.06 - Hardware API
pfe_enable_external_dma
Enables DRQ pin to start DMA transfer. int pfe_enable_external_dma ( unsigned char channel ); SC1x Parameters
- channel
- DRQ channel:
0 = DRQ0
1 = DRQ1
SC1x3 Parameters
- channel
- DRQ channel:
0 = DRQ0
1 = DRQ1
2 = DRQ2
3 = DRQ3
Return Value
- 0: no error
-1: invalid DRQ channel
-2: DMA channel is used for serial interface
Comments
- For using external DMA you have to disable the serial DMA mode. Do this with
a CHIP.INI entry.
COM uses DRQ1, EXT uses DRQ0.
SC1x Comments- Used pins:
Excluded pins:
If DRQ0: PIO1, INT5, default I²C-Bus pins, SPI
If DRQ1: PIO0, INT6, default I²C-Bus pins, SPI
SC1x3 Comments- Used pins:
Excluded pins:
If DRQ0: PIO12
If DRQ1: PIO29
If DRQ2: PIO7
If DRQ3: PIO8
RTOS API
- This library function invokes a RTOS software interrupt.
Refer to this RTOS API function's
documentation
for more details.
Supported since or modified in @CHIP-RTOS version-
SC12 | SC13 | SC11 | SC1x3 |
-
V1.02 | V1.00 | V1.00 | V0.90 |
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