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Added an important note. 

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@12406 110e8d01-0319-4d1e-a829-52ad28d1bb01
This commit is contained in:
gdisirio 2018-11-04 11:01:25 +00:00
parent 11c39c1b95
commit 375272e237
1 changed files with 20 additions and 2 deletions
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22
os/hal/ports/STM32/LLD/OCTOSPIv1/hal_wspi_lld.c
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@ -299,6 +299,15 @@ void wspi_lld_command(WSPIDriver *wspip, const wspi_command_t *cmdp) {
/**
* @brief Sends a command with data over the WSPI bus.
* @post At the end of the operation the configured callback is invoked.
* @note If using DTR in 8 lines mode then the following restrictions
* apply:
* - Command size must be 0, 2 or 4 bytes.
* - Address must be even.
* - Alternate bytes size must be 0, 2 or 4 bytes.
* - Data size must be a multiple of two.
* .
* There is no check on the above conditions in order to keep the
* code efficient.
*
* @param[in] wspip pointer to the @p WSPIDriver object
* @param[in] cmdp pointer to the command descriptor
@ -315,7 +324,7 @@ void wspi_lld_send(WSPIDriver *wspip, const wspi_command_t *cmdp,
dmaStreamSetMode(wspip->dma, wspip->dmamode | STM32_DMA_CR_DIR_M2P);
wspip->ospi->CR &= ~OCTOSPI_CR_FMODE;
wspip->ospi->DLR = n - 1;
wspip->ospi->DLR = n - 1U;
wspip->ospi->TCR = cmdp->dummy;
wspip->ospi->CCR = cmdp->cfg;
wspip->ospi->ABR = cmdp->alt;
@ -330,6 +339,15 @@ void wspi_lld_send(WSPIDriver *wspip, const wspi_command_t *cmdp,
/**
* @brief Sends a command then receives data over the WSPI bus.
* @post At the end of the operation the configured callback is invoked.
* @note If using DTR in 8 lines mode then the following restrictions
* apply:
* - Command size must be 0, 2 or 4 bytes.
* - Address must be even.
* - Alternate bytes size must be 0, 2 or 4 bytes.
* - Data size must be a multiple of two.
* .
* There is no check on the above conditions in order to keep the
* code efficient.
*
* @param[in] wspip pointer to the @p WSPIDriver object
* @param[in] cmdp pointer to the command descriptor
@ -346,7 +364,7 @@ void wspi_lld_receive(WSPIDriver *wspip, const wspi_command_t *cmdp,
dmaStreamSetMode(wspip->dma, wspip->dmamode | STM32_DMA_CR_DIR_P2M);
wspip->ospi->CR = (wspip->ospi->CR & ~OCTOSPI_CR_FMODE) | OCTOSPI_CR_FMODE_0;
wspip->ospi->DLR = n - 1;
wspip->ospi->DLR = n - 1U;
wspip->ospi->TCR = cmdp->dummy;
wspip->ospi->CCR = cmdp->cfg;
wspip->ospi->ABR = cmdp->alt;