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Hooks for SPI DMA support (incomplete)

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2145 42af7a65-404d-4744-a932-0658087f49c3
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patacongo 2009-10-16 19:46:32 +00:00
parent 20862e7bb5
commit b33074dcda
1 changed files with 5 additions and 7 deletions
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12
configs/stm3210e-eval/README.txt
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@ -347,13 +347,11 @@ STM3210E-EVAL-specific Configuration Options
CONFIG_U[S]ARTn_PARTIY - 0=no parity, 1=odd parity, 2=even parity CONFIG_U[S]ARTn_PARTIY - 0=no parity, 1=odd parity, 2=even parity
CONFIG_U[S]ARTn_2STOP - Two stop bits CONFIG_U[S]ARTn_2STOP - Two stop bits
CONFIG_SPI_POLLWAIT - Select to disable interrupt driven SPI support. CONFIG_STM32_SPI_INTERRUPT - Select to enable interrupt driven SPI
Poll-waiting is recommended if the interrupt rate would be to support. Non-interrupt-driven, poll-waiting is recommended if the
high in the interrupt driven case. interrupt rate would be to high in the interrupt driven case.
CONFIG_SPI_TXLIMIT - Write this many words to the Tx FIFO before CONFIG_STM32_SPI_DMA - Use DMA to improve SPI transfer performance.
emptying the Rx FIFO. If the SPI frequency is high and this Cannot be used with CONFIG_STM32_SPI_INTERRUPT.
value is large, then larger values of this setting may cause
Rx FIFO overrun errors. Default: half of the Tx FIFO size (4).
Configurations Configurations
^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^