114 lines
3.6 KiB
C
114 lines
3.6 KiB
C
/*
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* Copyright (C) 2019 Kai Ludwig, DG4KLU
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* Copyright (C) 2019-2025 Roger Clark, VK3KYY / G4KYF
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*
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*
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* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* 4. Use of this source code or binary releases for commercial purposes is strictly forbidden. This includes, without limitation,
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* incorporation in a commercial product or incorporation into a product or project which allows commercial use.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include "main.h"
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#include "interfaces/i2s.h"
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volatile bool g_TX_SAI_in_use = false;
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volatile bool isSending = false;
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volatile bool isReceiving = false;
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volatile bool stopOnNextI2SDMAInterrupt = false;
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uint16_t i2s_Tx_Buffer[NUM_I2S_BUFFERS][2][WAV_BUFFER_SIZE];
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uint16_t i2s_Rx_Buffer[NUM_I2S_BUFFERS][2][WAV_BUFFER_SIZE];
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static void clearI2SBuffersAndFlags(void)
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{
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memset(i2s_Tx_Buffer, 0x00, (NUM_I2S_BUFFERS * 2 * (WAV_BUFFER_SIZE * sizeof(uint16_t))));
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memset(i2s_Rx_Buffer, 0x00, (NUM_I2S_BUFFERS * 2 * (WAV_BUFFER_SIZE * sizeof(uint16_t))));
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stopOnNextI2SDMAInterrupt = false;
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isSending = false;
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isReceiving = false;
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HAL_I2S_DMAStop(&hi2s3);
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__HAL_I2SEXT_FLUSH_RX_DR(&hi2s3);
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g_TX_SAI_in_use = false;
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soundInit();
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}
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void HAL_I2SEx_TxRxHalfCpltCallback(I2S_HandleTypeDef *hi2s)
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{
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if (!stopOnNextI2SDMAInterrupt)
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{
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if (isSending)
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{
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g_TX_SAI_in_use = soundRefillData(0);
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}
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else if(isReceiving)
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{
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soundReceiveRefillData(0);
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}
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}
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else
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{
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clearI2SBuffersAndFlags();
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}
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}
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void HAL_I2SEx_TxRxCpltCallback(I2S_HandleTypeDef *hi2s)
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{
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if (!stopOnNextI2SDMAInterrupt)
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{
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if (isSending)
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{
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g_TX_SAI_in_use = soundRefillData(1);
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}
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else if(isReceiving)
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{
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soundReceiveRefillData(1);
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}
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}
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else
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{
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clearI2SBuffersAndFlags();
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}
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}
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void I2SStartDMA(uint16_t *txbuff, uint16_t *rxbuff, size_t bufferLen)
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{
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// Need to wait for WS line has just toggled from logic low to high
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while(!HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_15));
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while(HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_15));
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while(!HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_15));
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stopOnNextI2SDMAInterrupt = false;
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HAL_I2SEx_TransmitReceive_DMA(&hi2s3, txbuff, rxbuff, bufferLen);
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}
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void I2SReset(void)
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{
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}
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void I2STerminateTransfers(void)
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{
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stopOnNextI2SDMAInterrupt = true;
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}
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void init_I2S(void)
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{
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}
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