DMA configuration for DualI2s

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1

Hello, I want to read audio data from ADC using I2S of STM32F411 microcontroller. I want to use DMA to do so. But I have no idea how to configure it. I am using RTIC v2 with stm32f4xx_hal crate.
I have tried this code:

 let i2s = DualI2s::new(
            ctx.device.SPI2,
            ctx.device.I2S2EXT,
            (ws,ck,NoPin::new(),sd,sdext),
            &_clocks
        );

        let i2s_config: DualI2sDriverConfig<Master, Transmit, Receive, Philips> = DualI2sDriverConfig::new_master()
            .direction(Transmit, Receive)
            .standard(Philips)
            .data_format(DataFormat::Data32Channel32)
            .request_frequency(crate::common_peri::I2S_SAMPLE_RATE);


        let mut I2SInput = DualI2sDriver::new(i2s,i2s_config);
        
        I2SInput.ext().set_rx_dma(true);
        // configure DMA for I2S

        I2SInput.ext().set_error_interrupt(true);
        I2SInput.ext().set_rx_interrupt(true);
        let i2s_buffer = cortex_m::singleton!(: [u8; 2048] = [0; 2048]).unwrap();
        
        let streams = StreamsTuple::new(ctx.device.DMA2);

        let I2SDma=Transfer::init_peripheral_to_memory(
            streams.0, 
            I2SInput, 
            i2s_buffer,
            None, 
            DmaConfig::default()
            .memory_increment(true)
            .fifo_enable(true)
            .fifo_error_interrupt(true)
            .transfer_complete_interrupt(true)
        );

but I am getting error: the trait PeriAddress is not implemented for stm32f4xx_hal::i2s::stm32_i2s_v12x::driver::DualI2sDriver<DualI2s<stm32f4xx_hal::pac::SPI2>, stm32f4xx_hal::i2s::stm32_i2s_v12x::driver::Master, stm32f4xx_hal::i2s::stm32_i2s_v12x::driver::Transmit, stm32f4xx_hal::i2s::stm32_i2s_v12x::driver::Receive, stm32f4xx_hal::i2s::stm32_i2s_v12x::driver::Philips>

2

according to the documentation, the trait PeriAddress is implemented for I2sDriver, but not for DualI2sDriver.

but I don't have a STM32 device, so I can only guess: either

  • it's a hardware limitation that the dual i2s configuration doesn't support dma; -- or
  • it's merely an oversignt of the hal crate dma implementation
    • in which case you can open a request on their github page.
3

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