Implement auto-discovery of required hardware resources #110
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PIO-USB uses DMA channel, PIO instructions and State Machines to run its logic. These hardware resources are limited and usually can be shared between different modules. The current approach is the user to configure these resources manually and to resolve any possible conflicts. This approach may not work in all cases, especially in more complex systems. This patch implements logic for auto-discovery and allocation of required hardware resources. The Pico SDK has dedicated APIs for that. The existing approach for manually configuration still works, the auto-discovery logic is on top of it. How it can be triggered: - Instead of specifying a resource in pio_usb_configuration_t, set "-1". - Auto-discovery is supported of all resources: pio_tx_num, pio_rx_num, tx_ch, sm_tx, sm_rx and sm_eop. - Mixed mode is also supported - some of the resources can be set manually, others can be auto-discovered. Signed-off-by: Tzvetomir Stoyanov <[email protected]>
Use the logic for hardware resources auto-discovery by default, set this to be the PIO_USB_DEFAULT_CONFIG. Signed-off-by: Tzvetomir Stoyanov <[email protected]>
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fixes #24 |
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PIO-USB uses DMA channel, PIO instructions and State Machines to run its logic. These hardware resources are limited and usually can be shared between different modules. The current approach is the user to configure these resources manually and to resolve any possible conflicts. This approach may not work in all cases, especially in more complex systems. This patch implements logic for auto-discovery and allocation of required hardware resources. The Pico SDK has dedicated APIs for that. The existing approach for manual configuration still works, the auto-discovery logic is on top of it. How it can be triggered:
pio_usb_configuration_t, set-1.pio_tx_num,pio_rx_num,tx_ch,sm_tx,sm_rxandsm_eop.Signed-off-by: Tzvetomir Stoyanov [email protected]