pico-ice
RaspberryPi Pico with an iCE40 FPGA
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ice_cram.h
1/*
2 * MIT License
3 *
4 * Copyright (c) 2023 tinyVision.ai
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in all
14 * copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 */
24
31#pragma once
32#include <stdint.h>
33#include <stdbool.h>
34#include <stddef.h>
35
36#ifdef __cplusplus
37extern "C" {
38#endif
39
44void ice_cram_open(void);
45
53void ice_cram_write(const uint8_t *buf, size_t len);
54
61bool ice_cram_close(void);
62
63#ifdef __cplusplus
64}
65#endif
66
ice_cram_close
bool ice_cram_close(void)
Terminate the SPI transaction and prepare the FPGA to start, waiting until it finishes booting.
ice_cram_write
void ice_cram_write(const uint8_t *buf, size_t len)
Send the bitstream to the iCE40 CRAM, which configures the FPGA circuitry.
ice_cram_open
void ice_cram_open(void)
Reset the iCE40 and set it to CRAM configuration mode and prepare the incoming SPI transfer.