Initial Release

pio/i2c/pio_i2c.h

@@ -0,0 +1,31 @@
+/**
+ * Copyright (c) 2021 Raspberry Pi (Trading) Ltd.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+#ifndef _PIO_I2C_H
+#define _PIO_I2C_H
+
+#include "i2c.pio.h"
+
+// ----------------------------------------------------------------------------
+// Low-level functions
+
+void pio_i2c_start(PIO pio, uint sm);
+void pio_i2c_stop(PIO pio, uint sm);
+void pio_i2c_repstart(PIO pio, uint sm);
+
+bool pio_i2c_check_error(PIO pio, uint sm);
+void pio_i2c_resume_after_error(PIO pio, uint sm);
+
+// If I2C is ok, block and push data. Otherwise fall straight through.
+void pio_i2c_put_or_err(PIO pio, uint sm, uint16_t data);
+uint8_t pio_i2c_get(PIO pio, uint sm);
+
+// ----------------------------------------------------------------------------
+// Transaction-level functions
+
+int pio_i2c_write_blocking(PIO pio, uint sm, uint8_t addr, uint8_t *txbuf, uint len);
+int pio_i2c_read_blocking(PIO pio, uint sm, uint8_t addr, uint8_t *rxbuf, uint len);
+
+#endif