[WIP] nrf52832: add interface for SPI Master devices

1 files changed, 45 insertions, 0 deletions

diff --git a/src/spi.h b/src/spi.h
new file mode 100644
index 0000000..b076bcb
--- /dev/null
+++ b/src/spi.h
@@ -0,0 +1,45 @@
+#ifndef SPI_H
+#define SPI_H
+
+#include "gpio.h"
+
+#define MAX_TRANSFER_SIZE 256
+
+enum spi_interface {
+	SPI_0,
+	SPI_1,
+	SPI_2,
+};
+
+enum spi_frequency {
+	K125,
+	K250,
+	K500,
+	M1,
+	M2,
+	M4,
+	M8,
+};
+
+enum spi_clock_polarity {
+	ACTIVE_HIGH = 0,
+	ACTIVE_LOW = 1,
+};
+
+enum spi_clock_phase {
+	LEADING = 0,
+	TRAILING = 1,
+};
+
+enum spi_bits_order {
+	MSB_FIRST = 0,
+	LSB_FIRST = 0,
+};
+
+void spi_master_init(enum spi_interface spi, enum gpio_pin clock, enum gpio_pin mosi, enum gpio_pin miso, enum spi_bits_order order, enum spi_clock_polarity polarity, enum spi_clock_phase phase, enum spi_frequency frequency, char overread_char);
+
+u8 spi_master_transfer(enum spi_interface spi, u8 tx_size, u8 tx[], u8 rx_size, u8 rx[]);
+
+void spi_master_stop(enum spi_interface spi, enum gpio_pin clock, enum gpio_pin mosi, enum gpio_pin miso);
+
+#endif