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fix(spi_dma): fix the receive error with RX DMA start with non-aligned address.

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michael 2017-08-15 12:46:21 +08:00
parent bfb15c6fc9
commit a01db5569c
2 changed files with 2 additions and 2 deletions
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2
components/driver/include/driver/spi_master.h
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@ -86,7 +86,7 @@ struct spi_transaction_t {
void *rx_buffer; ///< Pointer to receive buffer, or NULL for no MISO phase. Written by 4 bytes-unit if DMA is used.
uint8_t rx_data[4]; ///< If SPI_USE_RXDATA is set, data is received directly to this variable
};
};
} ; //the rx data should start from a 32-bit aligned address to get around dma issue.
typedef struct spi_device_t* spi_device_handle_t; ///< Handle for a device on a SPI bus

2
components/driver/spi_master.c
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@ -603,7 +603,7 @@ esp_err_t spi_device_queue_trans(spi_device_handle_t handle, spi_transaction_t *
//if not use RXDATA neither rx_buffer, buffer_to_rcv assigned to NULL
trans_buf.buffer_to_rcv = trans_desc->rx_buffer;
}
if ( trans_buf.buffer_to_rcv && handle->host->dma_chan && !esp_ptr_dma_capable( trans_buf.buffer_to_rcv )) {
if ( trans_buf.buffer_to_rcv && handle->host->dma_chan && (!esp_ptr_dma_capable( trans_buf.buffer_to_rcv ) || ((int)trans_buf.buffer_to_rcv%4!=0)) ) {
//if rxbuf in the desc not DMA-capable, malloc a new one
trans_buf.buffer_to_rcv = heap_caps_malloc((trans_desc->rxlength+7)/8, MALLOC_CAP_DMA);
if ( trans_buf.buffer_to_rcv==NULL ) return ESP_ERR_NO_MEM;