grinningmosfet

Add broadcast mode to DMA

2

Fix #408

example_dma_external: interrupt service routine never runs

2

### Summary In the `example_dma_external` example, the interrupt service routine should print `D` on the serial output via the `PRINTF` macro when an end of DMA transaction (`DMA_TRANS_END_INTR`) interrupt is...

example_i2s: interrupt service routine never runs

1

### Summary In the `example_i2s` example, the interrupt service routine should set a flag to print `irq 1` on the serial output via the `PRINTF` macro when the internal I2S...