Part of MicroGen4 Music Synthesizer Program. (But not test it yet.) I2S ,DMA ,Stereo ,16Bit Dac(PCM1781) See detail: http://www.geocities.jp/micro_diys/index2
Now added generate Saw Wave to DAC function in generate(); You will hear Stereo saw wave sound now.
more info: http://www.geocities.jp/micro_diys/i2s_test_sample/i2s_test_sample.html
stm32f4xx_hal_msp.cpp
- Committer:
- p_igmon
- Date:
- 2014-07-03
- Revision:
- 0:dc88722ab141
File content as of revision 0:dc88722ab141:
/** ****************************************************************************** * File Name : stm32f4xx_hal_msp.c * Date : 22/06/2014 09:00:07 * Description : This file provides code for the MSP Initialization * and de-Initialization codes. ****************************************************************************** * * COPYRIGHT(c) 2014 STMicroelectronics * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * 3. Neither the name of STMicroelectronics nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * ****************************************************************************** */ #include "synthesizer.h" extern DigitalOut myled; extern DMA_HandleTypeDef hdma_i2s2_ext_tx; void HAL_I2S_MspInit(I2S_HandleTypeDef* hi2s) { // GPIO_InitTypeDef GPIO_InitStruct; if(hi2s->Instance==SPI2) { /* Peripheral clock enable */ __SPI2_CLK_ENABLE(); /**I2S2 GPIO Configuration PC3 ------> I2S2_SD PB10 ------> I2S2_CK PB12 ------> I2S2_WS PC6 ------> I2S2_MCK */ /* GPIO_InitStruct.Pin = GPIO_PIN_3|GPIO_PIN_6; GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; GPIO_InitStruct.Pull = GPIO_NOPULL; GPIO_InitStruct.Speed = GPIO_SPEED_LOW; GPIO_InitStruct.Alternate = GPIO_AF5_SPI2; HAL_GPIO_Init(GPIOC, &GPIO_InitStruct); GPIO_InitStruct.Pin = GPIO_PIN_10|GPIO_PIN_12; GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; GPIO_InitStruct.Pull = GPIO_NOPULL; GPIO_InitStruct.Speed = GPIO_SPEED_LOW; GPIO_InitStruct.Alternate = GPIO_AF5_SPI2; HAL_GPIO_Init(GPIOB, &GPIO_InitStruct); */ /* Peripheral DMA init*/ hdma_i2s2_ext_tx.Instance = DMA1_Stream4; hdma_i2s2_ext_tx.Init.Channel = DMA_CHANNEL_0; hdma_i2s2_ext_tx.Init.Direction = DMA_MEMORY_TO_PERIPH; hdma_i2s2_ext_tx.Init.PeriphInc = DMA_PINC_DISABLE; hdma_i2s2_ext_tx.Init.MemInc = DMA_MINC_ENABLE; hdma_i2s2_ext_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD; hdma_i2s2_ext_tx.Init.MemDataAlignment = DMA_MDATAALIGN_WORD; hdma_i2s2_ext_tx.Init.Mode = DMA_NORMAL; hdma_i2s2_ext_tx.Init.Priority = DMA_PRIORITY_LOW; hdma_i2s2_ext_tx.Init.FIFOMode = DMA_FIFOMODE_ENABLE; hdma_i2s2_ext_tx.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL; hdma_i2s2_ext_tx.Init.MemBurst = DMA_MBURST_SINGLE; hdma_i2s2_ext_tx.Init.PeriphBurst = DMA_PBURST_SINGLE; HAL_DMA_Init(&hdma_i2s2_ext_tx); __HAL_LINKDMA(hi2s,hdmatx,hdma_i2s2_ext_tx); // myled =1; } } void HAL_I2S_MspDeInit(I2S_HandleTypeDef* hi2s) { if(hi2s->Instance==SPI2) { /* Peripheral clock disable */ __SPI2_CLK_DISABLE(); /**I2S2 GPIO Configuration PC3 ------> I2S2_SD PB10 ------> I2S2_CK PB12 ------> I2S2_WS PC6 ------> I2S2_MCK */ // HAL_GPIO_DeInit(GPIOC, GPIO_PIN_3|GPIO_PIN_6); // HAL_GPIO_DeInit(GPIOB, GPIO_PIN_10|GPIO_PIN_12); /* Peripheral DMA DeInit*/ HAL_DMA_DeInit(hi2s->hdmatx); } } /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/