Add Support for USB programmable buttons (#12950)

quantum/programmable_button.c

@@ -0,0 +1,37 @@
+/*
+Copyright 2021 Thomas Weißschuh <thomas@t-8ch.de>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "programmable_button.h"
+#include "host.h"
+
+#define REPORT_BIT(index) (((uint32_t)1) << (index - 1))
+
+static uint32_t programmable_button_report = 0;
+
+void programmable_button_clear(void) { programmable_button_report = 0; }
+
+void programmable_button_send(void) { host_programmable_button_send(programmable_button_report); }
+
+void programmable_button_on(uint8_t index) { programmable_button_report |= REPORT_BIT(index); }
+
+void programmable_button_off(uint8_t index) { programmable_button_report &= ~REPORT_BIT(index); }
+
+bool programmable_button_is_on(uint8_t index) { return !!(programmable_button_report & REPORT_BIT(index)); };
+
+uint32_t programmable_button_get_report(void) { return programmable_button_report; };
+
+void programmable_button_set_report(uint32_t report) { programmable_button_report = report; }