watch library: implement SPI

1 files changed, 46 insertions, 0 deletions

diff --git a/watch-library/hardware/watch/watch_spi.c b/watch-library/hardware/watch/watch_spi.c
new file mode 100644
index 00000000..df68bbaa
--- /dev/null
+++ b/watch-library/hardware/watch/watch_spi.c
@@ -0,0 +1,46 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2022 Joey Castillo
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "watch_spi.h"
+
+struct io_descriptor *spi_io;
+
+void watch_enable_spi(void) {
+    SPI_0_init();
+    spi_m_sync_get_io_descriptor(&SPI_0, &spi_io);
+    spi_m_sync_enable(&SPI_0);
+}
+
+void watch_disable_spi(void) {
+    spi_m_sync_disable(&SPI_0);
+    spi_io = NULL;
+}
+
+void watch_spi_send(uint8_t *buf, uint16_t length) {
+	io_write(spi_io, buf, length);
+}
+
+void watch_spi_receive(uint8_t *buf, uint16_t length) {
+	io_read(spi_io, buf, length);
+}