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rp2040: Add support for PIO's jmp_pin #174

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merged 1 commit into from
Feb 23, 2024
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rp2040: Add support for PIO's jmp_pin #174

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7 changes: 6 additions & 1 deletion board-support/raspberrypi-rp2040/src/hal/pio.zig
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Original file line number Diff line number Diff line change
Expand Up @@ -83,6 +83,7 @@ pub const ClkDivOptions = struct {
};

pub const ExecOptions = struct {
jmp_pin: u5 = 0,
wrap: u5 = 31,
wrap_target: u5 = 0,
side_pindir: bool = false,
Expand Down Expand Up @@ -132,6 +133,7 @@ pub const LoadAndStartProgramOptions = struct {
clkdiv: ClkDivOptions,
shift: ShiftOptions = .{},
pin_mappings: PinMappingOptions = .{},
exec: ExecOptions = .{},
};

pub const Pio = enum(u1) {
Expand Down Expand Up @@ -254,18 +256,19 @@ pub const Pio = enum(u1) {
pub fn sm_set_exec_options(self: Pio, sm: StateMachine, options: ExecOptions) void {
const sm_regs = self.get_sm_regs(sm);
sm_regs.execctrl.modify(.{
// NOTE: EXEC_STALLED is RO
.WRAP_BOTTOM = options.wrap_target,
.WRAP_TOP = options.wrap,
.SIDE_PINDIR = @intFromBool(options.side_pindir),
.SIDE_EN = @intFromBool(options.side_set_optional),
.JMP_PIN = options.jmp_pin,

// TODO: plug in rest of the options
// STATUS_N
// STATUS_SEL
// OUT_STICKY
// INLINE_OUT_EN
// OUT_EN_SEL
// JMP_PIN
// EXEC_STALLED
});
}
Expand Down Expand Up @@ -514,6 +517,8 @@ pub const Pio = enum(u1) {
side_set.optional
else
false,

.jmp_pin = options.exec.jmp_pin,
},
});
}
Expand Down