Merge branch 'master'

[fw/altos] / src / samd21 / ao_tcc_samd21.c

diff --git a/src/samd21/ao_tcc_samd21.c b/src/samd21/ao_tcc_samd21.c
new file mode 100644 (file)
index 0000000..9cb45c0
--- /dev/null
+++ b/src/samd21/ao_tcc_samd21.c
@@ -0,0 +1,74 @@
+/*
+ * Copyright © 2019 Keith Packard <keithp@keithp.com>
+ *
+ * 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.
+ */
+
+#include <ao.h>
+#include <ao_tcc-samd21.h>
+
+void
+ao_tcc_set(struct samd21_tcc *tcc, uint8_t channel, uint32_t value)
+{
+       tcc->cc[channel] = value;
+}
+
+static void
+ao_tcc_init(struct samd21_tcc *tcc, uint32_t apbcmask)
+{
+       samd21_pm.apbcmask |= apbcmask;
+
+       /* Reset the device */
+       tcc->ctrla = (1 << SAMD21_TCC_CTRLA_SWRST);
+
+       while ((tcc->ctrla & (1 << SAMD21_TCC_CTRLA_SWRST)) != 0 ||
+              (tcc->syncbusy & (1 << SAMD21_TCC_SYNCBUSY_SWRST)) != 0)
+               ;
+
+       tcc->per = AO_TCC_PERIOD - 1;
+
+#if 0
+       tcc->evctrl = ((1 << SAMD21_TCC_EVCTRL_MCEO(0)) |
+                      (1 << SAMD21_TCC_EVCTRL_MCEO(1)) |
+                      (1 << SAMD21_TCC_EVCTRL_MCEO(2)) |
+                      (1 << SAMD21_TCC_EVCTRL_MCEO(3)));
+#endif
+
+       tcc->wave = ((SAMD21_TCC_WAVE_WAVEGEN_NPWM << SAMD21_TCC_WAVE_WAVEGEN) |
+                    (0 << SAMD21_TCC_WAVE_RAMP) |
+                    (0 << SAMD21_TCC_WAVE_CIPEREN) |
+                    (0 << SAMD21_TCC_WAVE_CCCEN(0)) |
+                    (0 << SAMD21_TCC_WAVE_CCCEN(1)) |
+                    (0 << SAMD21_TCC_WAVE_CCCEN(2)) |
+                    (0 << SAMD21_TCC_WAVE_CCCEN(3)) |
+                    (0 << SAMD21_TCC_WAVE_POL(0)) |
+                    (0 << SAMD21_TCC_WAVE_POL(1)) |
+                    (0 << SAMD21_TCC_WAVE_POL(1)) |
+                    (0 << SAMD21_TCC_WAVE_POL(3)) |
+                    (0 << SAMD21_TCC_WAVE_SWAP(0)) |
+                    (0 << SAMD21_TCC_WAVE_SWAP(1)) |
+                    (0 << SAMD21_TCC_WAVE_SWAP(1)) |
+                    (0 << SAMD21_TCC_WAVE_SWAP(3)));
+
+       tcc->ctrla = (1 << SAMD21_TCC_CTRLA_ENABLE);
+       tcc->dbgctrl = (1 << SAMD21_TCC_DBGCTRL_DBGRUN);
+}
+
+void
+ao_tcc_samd21_init(void)
+{
+       samd21_gclk_clkctrl(0, SAMD21_GCLK_CLKCTRL_ID_TCC0_TCC1);
+       samd21_gclk_clkctrl(0, SAMD21_GCLK_CLKCTRL_ID_TCC2_TC3);
+
+       ao_tcc_init(&samd21_tcc0, 1 << SAMD21_PM_APBCMASK_TCC0);
+       ao_tcc_init(&samd21_tcc1, 1 << SAMD21_PM_APBCMASK_TCC1);
+       ao_tcc_init(&samd21_tcc2, 1 << SAMD21_PM_APBCMASK_TCC2);
+}