1 files changed, 42 insertions, 0 deletions
diff --git a/spi.h b/spi.h
new file mode 100644
index 0000000..0402cfe
--- /dev/null
+++ b/spi.h
@@ -0,0 +1,42 @@
+#ifndef _H_SPI
+#define _H_SPI
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+#include "spi_config.h"
+
+#define DUMMY_DATA 0xff
+
+#ifdef SPI_MSSP1
+	#define SSPSTAT SSP1STAT
+	#define SSPSTATbits SSP1STATbits
+	#define SSPCON1 SSP1CON1
+	#define SSPCON1bits SSP1CON1bits
+	#define SSPADD SSP1ADD
+	#define SSPBUF SSP1BUF
+#else
+#ifdef SPI_MSSP2
+	#define SSPSTAT SSP2STAT
+	#define SSPSTATbits SSP2STATbits
+	#define SSPCON1 SSP2CON1
+	#define SSPCON1bits SSP2CON1bits
+	#define SSPADD SSP2ADD
+	#define SSPBUF SSP2BUF
+#else
+	#error define either SPI_MSSP1 or SPI_MSSP2
+#endif
+#endif
+
+#define spi_tx(x) (spi_exchange(x))
+#define spi_rx() (spi_exchange(DUMMY_DATA))
+
+void spi_init(void);
+uint8_t spi_exchange(uint8_t data);
+uint8_t spi_exchange_buffer(uint8_t *in, uint8_t buflen, uint8_t *out);
+inline bool spi_is_buffer_full(void);
+inline bool spi_has_write_collision_occured(void);
+inline void spi_clear_write_collision_status(void);
+
+#endif