1 | //Programmcode
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2 | uint32_t buf=0b10101010101010101100110011001100;
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3 | HAL_SAI_Transmit_DMA2(&hsai_BlockA1, (uint8_t*)&buf, 1);
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4 |
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5 | //DMA Transmit Funktion
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6 |
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7 | HAL_StatusTypeDef HAL_SAI_Transmit_DMA2(SAI_HandleTypeDef *hsai, uint8_t *pData, uint16_t Size){
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8 |
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9 | HAL_DMA_Start(hsai->hdmatx, (uint32_t)pData, (uint32_t)&hsai->Instance->DR, Size);
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10 |
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11 | // Enable SAI
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12 | __HAL_SAI_ENABLE(hsai);
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13 |
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14 | /* Enable SAI Tx DMA Request */
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15 | hsai->Instance->CR1 |= SAI_xCR1_DMAEN;
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16 |
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17 | return HAL_OK;
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18 |
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19 | }
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20 |
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21 | //Konfiguration SAI
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22 |
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23 | hsai_BlockA1.Instance = SAI1_Block_A;
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24 | hsai_BlockA1.Init.AudioMode = SAI_MODEMASTER_TX;
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25 | hsai_BlockA1.Init.Synchro = SAI_ASYNCHRONOUS;
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26 | hsai_BlockA1.Init.OutputDrive = SAI_OUTPUTDRIVE_DISABLE;
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27 | hsai_BlockA1.Init.NoDivider = SAI_MASTERDIVIDER_ENABLE;
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28 | hsai_BlockA1.Init.FIFOThreshold = SAI_FIFOTHRESHOLD_HF;
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29 | hsai_BlockA1.Init.AudioFrequency = SAI_AUDIO_FREQUENCY_8K;
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30 | hsai_BlockA1.Init.SynchroExt = SAI_SYNCEXT_DISABLE;
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31 | hsai_BlockA1.Init.MonoStereoMode = SAI_STEREOMODE;
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32 | hsai_BlockA1.Init.CompandingMode = SAI_NOCOMPANDING;
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33 | hsai_BlockA1.Init.TriState = SAI_OUTPUT_NOTRELEASED;
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34 | HAL_SAI_InitProtocol(&hsai_BlockA1, SAI_I2S_MSBJUSTIFIED, SAI_PROTOCOL_DATASIZE_32BIT, 2);
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35 |
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36 | //Konfiguration DMA
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37 |
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38 | __HAL_RCC_DMA2_CLK_ENABLE();
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39 |
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40 | hdma_sai1_a.Instance=DMA2_Stream1;
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41 | hdma_sai1_a.Init.Channel = DMA_CHANNEL_0;// Channel 0, Stream 0
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42 | hdma_sai1_a.Init.Direction=DMA_PERIPH_TO_MEMORY;
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43 | hdma_sai1_a.Init.PeriphInc=DMA_PINC_DISABLE;
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44 | hdma_sai1_a.Init.MemInc=DMA_MINC_DISABLE;
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45 | hdma_sai1_a.Init.PeriphDataAlignment=DMA_PDATAALIGN_HALFWORD;
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46 | hdma_sai1_a.Init.MemDataAlignment=DMA_MDATAALIGN_HALFWORD;
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47 | hdma_sai1_a.Init.Mode=DMA_NORMAL;
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48 | hdma_sai1_a.Init.Priority=DMA_PRIORITY_HIGH;
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49 | hdma_sai1_a.Init.FIFOMode=DMA_FIFOMODE_DISABLE;
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50 | hdma_sai1_a.Init.FIFOThreshold=DMA_FIFO_THRESHOLD_HALFFULL;
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51 | hdma_sai1_a.Init.MemBurst=DMA_MBURST_SINGLE;
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52 | hdma_sai1_a.Init.PeriphBurst=DMA_PBURST_SINGLE;
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53 | hdma_sai1_a.XferCpltCallback = HAL_DMA_XFER_HALFCPLT_CB_ID;
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54 |
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55 | //Initialize DMA
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56 | HAL_DMA_Init(&hdma_sai1_a);
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