Import of the watch repository from Pebble

src/fw/drivers/display/ice40lp/ice40lp_internal.h

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include "drivers/gpio.h"
+
+#include <stdbool.h>
+
+typedef enum {
+  CMD_FRAME_BEGIN = 0x5,
+} DisplayCmd;
+
+
+
+void display_spi_begin_transaction(void);
+void display_spi_end_transaction(void);
+void display_spi_configure_default(void);
+bool display_busy(void);
+void display_start(void);
+void display_program(const uint8_t *fpga_bitstream, uint32_t bitstream_size);
+void display_send_clocks(uint32_t count);
+void display_start_frame(void);
+void display_write_byte(uint8_t d);
+void display_send_cmd(DisplayCmd cmd);
+void display_power_enable(void);
+void display_power_disable(void);
+
+//! Reset the FPGA into bootloader mode.
+//!
+//! @return true if successful, false if the NVCM is not programmed.
+bool display_switch_to_bootloader_mode(void);