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view venus/src/periph/bl_current_sink.v @ 96:ae6951a70d2b

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U403: change from 74LVC2G125 to 74LVC2G126 The two parts have the same footprint and pinout, but '126 3-state buffers have active-high OE inputs instead of active-low. The change is purely for software benefit: having GPIO 11/12 set to 1 correspond to that current contribution being enabled will be much more intuitive for developers and tinkerers.
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 09 May 2022 19:27:11 +0000
parents d55824058cfc
children
line wrap: on
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module bl_current_sink (GND, Vio, BL_GPIO9, BL_GPIO11, BL_GPIO12, LEDK);

input GND, Vio;
input BL_GPIO9, BL_GPIO11, BL_GPIO12;
output [1:3] LEDK;

wire SET;

MAX1916 MAX1916 (.GND(GND),
		 .EN(BL_GPIO9),
		 .SET(SET),
		 .LEDK(LEDK)
	);

resistor BL_EN_pulldown (BL_GPIO9, GND);

bl_current_select cursel (.GND(GND),
			  .Vio(Vio),
			  .BL_GPIO11(BL_GPIO11),
			  .BL_GPIO12(BL_GPIO12),
			  .SET(SET)
	);

endmodule