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Add control-buffer-512 and -1024 feature flags #62

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Add control-buffer-512 and -1024 feature flags #62

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2 changes: 2 additions & 0 deletions Cargo.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,8 @@ rand = "0.6.1"
[features]
# Use a 256 byte buffer for control transfers instead of 128.
control-buffer-256 = []
control-buffer-512 = []
control-buffer-1024 = []

# Use larger endpoint buffers for highspeed operation (default fullspeed)
#
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19 changes: 16 additions & 3 deletions src/control_pipe.rs
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Expand Up @@ -21,10 +21,23 @@ enum ControlState {

// Maximum length of control transfer data stage in bytes. 128 bytes by default. You can define the
// feature "control-buffer-256" to make it 256 bytes if you have larger control transfers.
#[cfg(not(feature = "control-buffer-256"))]
const CONTROL_BUF_LEN: usize = 128;
#[cfg(feature = "control-buffer-256")]

#[cfg(feature = "control-buffer-1024")]
const CONTROL_BUF_LEN: usize = 1024;
#[cfg(all(not(feature = "control-buffer-1024"), feature = "control-buffer-512"))]
const CONTROL_BUF_LEN: usize = 512;
#[cfg(all(
not(feature = "control-buffer-1024"),
not(feature = "control-buffer-512"),
feature = "control-buffer-256"
))]
const CONTROL_BUF_LEN: usize = 256;
#[cfg(all(
not(feature = "control-buffer-1024"),
not(feature = "control-buffer-512"),
not(feature = "control-buffer-256")
))]
const CONTROL_BUF_LEN: usize = 128;

/// Buffers and parses USB control transfers.
pub struct ControlPipe<'a, B: UsbBus> {
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