Merge pull request #43 from spicyjpeg/cmake

Even more CMake fixes, submodules, pads example

1 files changed, 61 insertions, 0 deletions

diff --git a/examples/io/pads/spi.h b/examples/io/pads/spi.h
new file mode 100644
index 0000000..1c473cd
--- /dev/null
+++ b/examples/io/pads/spi.h
@@ -0,0 +1,61 @@
+/*
+ * PSn00bSDK controller polling example (SPI driver)
+ * (C) 2021 spicyjpeg - MPL licensed
+ */
+
+#ifndef __SPI_H
+#define __SPI_H
+
+#include <stdint.h>
+#include <psxpad.h>
+
+//#define SPI_BUFF_LEN 34
+#define SPI_BUFF_LEN 140
+
+/* Request structures */
+
+typedef void (*SPICALLBACK)(uint32_t port, const volatile uint8_t *buff, size_t rx_len);
+
+typedef struct _SPIREQUEST {
+	union {
+		uint8_t        data[SPI_BUFF_LEN];
+		PADREQUEST     pad_req;
+		MCDREQUEST     mcd_req;
+	};
+	uint32_t           len, port;
+	SPICALLBACK        callback;
+	struct _SPIREQUEST *next;
+} SPIREQUEST;
+
+/* Public API */
+
+/**
+ * @brief Allocates a new request object and adds it to the request queue. The
+ * object must be populated afterwards by setting the length, callback and
+ * filling in the TX data buffer.
+ */
+SPIREQUEST *spi_new_request(void);
+
+/**
+ * @brief Changes the controller polling rate. The lowest supported rate is 65
+ * Hz (requests sent every 1/65th of a second, each port polled at 32.5 Hz when
+ * no request is pending).
+ *
+ * @param value
+ */
+void spi_set_poll_rate(uint32_t value);
+
+/**
+ * @brief Installs the SPI and timer 2 interrupt handlers and starts the poll
+ * timer. By default the polling rate is set to 250 Hz (125 Hz per port),
+ * however it can be changed at any time by calling spi_set_poll_rate().
+ *
+ * The provided callback (if any) is called to report the result of poll
+ * requests, which are issued automatically when no other request is in the
+ * queue. Passing NULL as callback does not disable auto-polling.
+ *
+ * @param callback
+ */
+void spi_init(SPICALLBACK callback);
+
+#endif