Hi Team,
I have configured the I2C in Master Mode and Enabled LPDMA channel 2 and 3 respectively for I2C3Tx and I2C3Rx.
/* I2C3 DMA Init */
/* LPDMA1_REQUEST_I2C3_TX Init */
handle_LPDMA1_Channel2.Instance = LPDMA1_Channel2;
handle_LPDMA1_Channel2.Init.Request = LPDMA1_REQUEST_I2C3_TX;
handle_LPDMA1_Channel2.Init.BlkHWRequest = DMA_BREQ_SINGLE_BURST;
handle_LPDMA1_Channel2.Init.Direction = DMA_MEMORY_TO_PERIPH;
handle_LPDMA1_Channel2.Init.SrcInc = DMA_SINC_INCREMENTED;
handle_LPDMA1_Channel2.Init.DestInc = DMA_DINC_FIXED;
handle_LPDMA1_Channel2.Init.SrcDataWidth = DMA_SRC_DATAWIDTH_BYTE;
handle_LPDMA1_Channel2.Init.DestDataWidth = DMA_DEST_DATAWIDTH_BYTE;
handle_LPDMA1_Channel2.Init.Priority = DMA_LOW_PRIORITY_HIGH_WEIGHT;
handle_LPDMA1_Channel2.Init.TransferEventMode = DMA_TCEM_BLOCK_TRANSFER;
handle_LPDMA1_Channel2.Init.Mode = DMA_NORMAL;
if (HAL_DMA_Init(&handle_LPDMA1_Channel2) != HAL_OK)
{
Error_Handler();
}
__HAL_LINKDMA(hi2c, hdmatx, handle_LPDMA1_Channel2);
if (HAL_DMA_ConfigChannelAttributes(&handle_LPDMA1_Channel2, DMA_CHANNEL_NPRIV) != HAL_OK)
{
Error_Handler();
}
/* LPDMA1_REQUEST_I2C3_RX Init */
handle_LPDMA1_Channel3.Instance = LPDMA1_Channel3;
handle_LPDMA1_Channel3.Init.Request = LPDMA1_REQUEST_I2C3_RX;
handle_LPDMA1_Channel3.Init.BlkHWRequest = DMA_BREQ_SINGLE_BURST;
handle_LPDMA1_Channel3.Init.Direction = DMA_PERIPH_TO_MEMORY;
handle_LPDMA1_Channel3.Init.SrcInc = DMA_SINC_FIXED;
handle_LPDMA1_Channel3.Init.DestInc = DMA_DINC_INCREMENTED;
handle_LPDMA1_Channel3.Init.SrcDataWidth = DMA_SRC_DATAWIDTH_BYTE;
handle_LPDMA1_Channel3.Init.DestDataWidth = DMA_DEST_DATAWIDTH_BYTE;
handle_LPDMA1_Channel3.Init.Priority = DMA_LOW_PRIORITY_HIGH_WEIGHT;
handle_LPDMA1_Channel3.Init.TransferEventMode = DMA_TCEM_BLOCK_TRANSFER;
handle_LPDMA1_Channel3.Init.Mode = DMA_NORMAL;
if (HAL_DMA_Init(&handle_LPDMA1_Channel3) != HAL_OK)
{
Error_Handler();
}
__HAL_LINKDMA(hi2c, hdmarx, handle_LPDMA1_Channel3);
if (HAL_DMA_ConfigChannelAttributes(&handle_LPDMA1_Channel3, DMA_CHANNEL_NPRIV) != HAL_OK)
{
Error_Handler();
}
/* I2C3 interrupt Init */
HAL_NVIC_SetPriority(I2C3_EV_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(I2C3_EV_IRQn);
Configured I2C as Master and Standard Mode.
Now if Tried to send 10bytes of data using
HAL_I2C_Master_Transmit_DMA(&hi2c3, 0x3A, tx_bufferTemp, 10);
I am getting error at DMA_TX handler as
if ((__HAL_DMA_GET_FLAG(hdma, DMA_FLAG_DTE) != 0U))
{
/* Check if interrupt source is enabled */
if (__HAL_DMA_GET_IT_SOURCE(hdma, DMA_IT_DTE) != 0U)
{
/* Clear the transfer error flag */
__HAL_DMA_CLEAR_FLAG(hdma, DMA_FLAG_DTE);
/* Update the DMA channel error code */
hdma->ErrorCode |= HAL_DMA_ERROR_DTE;
}
}
Please look into this issue and help to move forward to communicate with external sensor.
