planck/rev6: Enable WS2812 LED matrix with pwm drivers (#9735)

* planck/rev6: Enable WS2812 LED matrix with pwm drivers

* Comments and cleanup.

* GPL2+ Licensing

Co-authored-by: Nick Brassel <nick@tzarc.org>

1 files changed, 21 insertions, 0 deletions

diff --git a/keyboards/planck/rev6/chconf.h b/keyboards/planck/rev6/chconf.h
new file mode 100644
index 000000000..0298c11c4
--- /dev/null
+++ b/keyboards/planck/rev6/chconf.h
@@ -0,0 +1,21 @@
+/* Copyright 2020 QMK Contributors
+ *
+ * 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 3 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/>.
+ */
+
+// Need to override the SysTick timer to use TIM3 -- this is a 16-bit timer on F303
+// so we need to change resolution and frequency to match.
+#define CH_CFG_ST_RESOLUTION 16
+#define CH_CFG_ST_FREQUENCY 10000
+#include_next "chconf.h"