Ajout FishPeper

2026-04-21 12:19:15 +02:00
parent 6744da3f88
commit 0c361a2440
2160 changed files with 589301 additions and 1 deletions
--- a/OpenSky/arch/rasp/hal_spi.c
+++ b/OpenSky/arch/rasp/hal_spi.c
@@ -0,0 +1,118 @@
+/*
+    Copyright 2017 fishpepper <AT> gmail.com
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http:// www.gnu.org/licenses/>.
+
+   author: fishpepper <AT> gmail.com
+*/
+
+#include <stdint.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <linux/types.h>
+#include <linux/spi/spidev.h>
+
+#include "hal_spi.h"
+
+static void pabort(const char *s) {
+    perror(s);
+    abort();
+}
+
+static const char *device = "/dev/spidev0.0";
+static uint8_t bits = 8;
+static uint32_t speed = 1000000;
+static int fd = -1;
+static uint32_t mode = 0;
+static uint16_t delay = 20;
+
+void hal_spi_init(void) {
+    int ret = 0;
+
+    /*
+     * Open device
+     */
+    fd = open(device, O_RDWR);
+    if (fd < 0)
+        pabort("can't open device");
+
+    /*
+     * spi mode
+     */
+    ret = ioctl(fd, SPI_IOC_WR_MODE, &mode);
+    if (ret == -1)
+        pabort("can't set spi mode");
+
+    ret = ioctl(fd, SPI_IOC_RD_MODE, &mode);
+    if (ret == -1)
+        pabort("can't get spi mode");
+
+    /*
+     * bits per word
+     */
+    ret = ioctl(fd, SPI_IOC_WR_BITS_PER_WORD, &bits);
+    if (ret == -1)
+        pabort("can't set bits per word");
+
+    ret = ioctl(fd, SPI_IOC_RD_BITS_PER_WORD, &bits);
+    if (ret == -1)
+        pabort("can't get bits per word");
+
+    /*
+     * max speed hz
+     */
+    ret = ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, &speed);
+    if (ret == -1)
+        pabort("can't set max speed hz");
+
+    ret = ioctl(fd, SPI_IOC_RD_MAX_SPEED_HZ, &speed);
+    if (ret == -1)
+        pabort("can't get max speed hz");
+
+    printf("spi: mode: 0x%x\n", mode);
+    printf("spi: bits per word: %d\n", bits);
+    printf("spi: max speed: %d Hz (%f MHz)\n", speed, speed/1000000.0);
+}
+
+void hal_spi_dma_xfer(uint8_t *buffer, uint8_t len) {
+    int ret;
+    uint8_t rx;
+#if LOG_SPI
+    int i;
+    for (i=0; i < len; i++)
+        fprintf(stderr, "> %x\n", buffer[i]);
+#endif  // LOG_SPI
+    struct spi_ioc_transfer tr = {
+        .tx_buf = (uint64_t)buffer,
+        .rx_buf = (uint64_t)buffer,
+        .len = len,
+        .delay_usecs = delay,
+        .speed_hz = speed,
+        .bits_per_word = bits,
+    };
+
+    ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr);
+    if (ret < 1)
+        pabort("can't send spi message");
+#if LOG_SPI
+    for (i=0; i < len; i++)
+        fprintf(stderr, "< %x\n", buffer[i]);
+    fprintf(stderr, "\n");
+#endif  // LOG_SPI
+}