| commit | author | age | ||
| 1e563e | 1 | /********************************************************************************* |
| G | 2 | * Copyright: (C) 2024 LingYun IoT System Studio |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * Filename: spi_test.c | |
| 6 | * Description: This file is SPI loop test program | |
| 7 | * | |
| 8 | * Version: 1.0.0(05/23/2024) | |
| 9 | * Author: Guo Wenxue <guowenxue@gmail.com> | |
| 10 | * ChangeLog: 1, Release initial version on "05/23/2024 07:51:06 PM" | |
| 11 | * | |
| 12 | ********************************************************************************/ | |
| 13 | ||
| 14 | #include <stdio.h> | |
| 15 | #include <stdlib.h> | |
| 16 | #include <stdint.h> | |
| 17 | #include <unistd.h> | |
| 18 | #include <string.h> | |
| 19 | #include <errno.h> | |
| 20 | #include <getopt.h> | |
| 21 | #include <libgen.h> | |
| 22 | #include <fcntl.h> | |
| 23 | #include <sys/types.h> | |
| 24 | #include <sys/stat.h> | |
| 25 | #include <sys/ioctl.h> | |
| 26 | #include <linux/spi/spidev.h> | |
| 27 | ||
| 28 | typedef struct spi_ctx_s | |
| 29 | { | |
| 30 | int fd; | |
| 31 | char dev[64]; | |
| 32 | uint8_t bits; | |
| 33 | uint16_t delay; | |
| 34 | uint32_t mode; | |
| 35 | uint32_t speed; | |
| 36 | } spi_ctx_t; | |
| 37 | ||
| 38 | static int spi_init(spi_ctx_t *spi_ctx); | |
| 39 | static int transfer(spi_ctx_t *spi_ctx, uint8_t const *tx, uint8_t const *rx, size_t len); | |
| 40 | ||
| 41 | static void program_usage(char *progname) | |
| 42 | { | |
| 43 | printf("Usage: %s [OPTION]...\n", progname); | |
| 44 | printf(" %s is a program to test IGKBoard loop spi\n", progname); | |
| 45 | ||
| 46 | printf("\nMandatory arguments to long options are mandatory for short options too:\n"); | |
| 47 | printf(" -d[device ] Specify SPI device, such as: /dev/spidev0.0\n"); | |
| 48 | printf(" -s[speed ] max speed (Hz), such as: -s 500000\n"); | |
| 49 | printf(" -p[print ] Send data (such as: -p 1234/xde/xad)\n"); | |
| 50 | ||
| 51 | printf("\n%s version 1.0\n", progname); | |
| 52 | return; | |
| 53 | } | |
| 54 | ||
| 55 | int main(int argc,char * argv[]) | |
| 56 | { | |
| 57 | spi_ctx_t spi_ctx; | |
| 58 | uint32_t spi_speed = 500000; // Default SPI speed 500KHz | |
| 59 | char *spi_dev = "/dev/spidev0.0"; // Default SPI device | |
| 60 | char *input_tx = "Hello LingYun"; // Default transfer data | |
| 61 | uint8_t rx_buffer[128]; | |
| 62 | int opt; | |
| 63 | char *progname=NULL; | |
| 64 | ||
| 65 | struct option long_options[] = { | |
| 66 | {"device", required_argument, NULL, 'd'}, | |
| 67 | {"speed", required_argument, NULL, 's'}, | |
| 68 | {"print", required_argument, NULL, 'p'}, | |
| 69 | {"help", no_argument, NULL, 'h'}, | |
| 70 | {NULL, 0, NULL, 0} | |
| 71 | }; | |
| 72 | ||
| 73 | progname = (char *)basename(argv[0]); | |
| 74 | ||
| 75 | while((opt = getopt_long(argc, argv, "d:s:p:h", long_options, NULL)) != -1) | |
| 76 | { | |
| 77 | switch (opt) | |
| 78 | { | |
| 79 | case 'd': | |
| 80 | spi_dev = optarg; | |
| 81 | break; | |
| 82 | ||
| 83 | case 's': | |
| 84 | spi_speed = atoi(optarg); | |
| 85 | break; | |
| 86 | ||
| 87 | case 'p': | |
| 88 | input_tx = optarg; | |
| 89 | break; | |
| 90 | ||
| 91 | case 'h': | |
| 92 | program_usage(progname); | |
| 93 | return 0; | |
| 94 | ||
| 95 | default: | |
| 96 | break; | |
| 97 | } | |
| 98 | } | |
| 99 | ||
| 100 | memset(&spi_ctx, 0, sizeof(spi_ctx)); | |
| 101 | strncpy(spi_ctx.dev, spi_dev, sizeof(spi_ctx.dev)); | |
| 102 | spi_ctx.bits = 8; | |
| 103 | spi_ctx.delay = 100; | |
| 104 | spi_ctx.mode = SPI_MODE_2; | |
| 105 | spi_ctx.speed = spi_speed; | |
| 106 | ||
| 107 | if( spi_init(&spi_ctx) < 0 ) | |
| 108 | { | |
| 109 | printf("Initial SPI device '%s' failed.\n", spi_ctx.dev); | |
| 110 | return -1; | |
| 111 | } | |
| 112 | printf("Initial SPI device '%s' okay.\n", spi_ctx.dev); | |
| 113 | ||
| 114 | if ( transfer(&spi_ctx, input_tx, rx_buffer, strlen(input_tx)) < 0 ) | |
| 115 | { | |
| 116 | printf("spi transfer error\n"); | |
| 117 | return -2; | |
| 118 | } | |
| 119 | ||
| 120 | printf("tx_buffer: | %s |\n", input_tx); | |
| 121 | printf("rx_buffer: | %s |\n", rx_buffer); | |
| 122 | ||
| 123 | return 0; | |
| 124 | } | |
| 125 | ||
| 126 | int transfer(spi_ctx_t *spi_ctx, uint8_t const *tx, uint8_t const *rx, size_t len) | |
| 127 | { | |
| 128 | struct spi_ioc_transfer tr = { | |
| 129 | .tx_buf = (unsigned long )tx, | |
| 130 | .rx_buf = (unsigned long )rx, | |
| 131 | .len = len, | |
| 132 | .delay_usecs = spi_ctx->delay, | |
| 133 | .speed_hz = spi_ctx->speed, | |
| 134 | .bits_per_word = spi_ctx->bits, | |
| 135 | }; | |
| 136 | ||
| 137 | if( ioctl(spi_ctx->fd, SPI_IOC_MESSAGE(1), &tr) < 0) | |
| 138 | { | |
| 139 | printf("ERROR: SPI transfer failure: %s\n ", strerror(errno)); | |
| 140 | return -1; | |
| 141 | } | |
| 142 | ||
| 143 | return 0; | |
| 144 | } | |
| 145 | ||
| 146 | int spi_init(spi_ctx_t *spi_ctx) | |
| 147 | { | |
| 148 | int ret; | |
| 149 | spi_ctx->fd = open(spi_ctx->dev, O_RDWR); | |
| 150 | if(spi_ctx->fd < 0) | |
| 151 | { | |
| 152 | printf("open %s error\n", spi_ctx->dev); | |
| 153 | return -1; | |
| 154 | } | |
| 155 | ||
| 156 | ret = ioctl(spi_ctx->fd, SPI_IOC_RD_MODE, &spi_ctx->mode); | |
| 157 | if( ret < 0 ) | |
| 158 | { | |
| 159 | printf("ERROR: SPI set SPI_IOC_RD_MODE [0x%x] failure: %s\n ", spi_ctx->mode, strerror(errno)); | |
| 160 | goto cleanup; | |
| 161 | } | |
| 162 | ||
| 163 | ret = ioctl(spi_ctx->fd, SPI_IOC_WR_MODE, &spi_ctx->mode); | |
| 164 | if( ret < 0 ) | |
| 165 | { | |
| 166 | printf("ERROR: SPI set SPI_IOC_WR_MODE [0x%x] failure: %s\n ", spi_ctx->mode, strerror(errno)); | |
| 167 | goto cleanup; | |
| 168 | } | |
| 169 | ||
| 170 | ret = ioctl(spi_ctx->fd, SPI_IOC_RD_BITS_PER_WORD, &spi_ctx->bits); | |
| 171 | if( ret < 0 ) | |
| 172 | { | |
| 173 | printf("ERROR: SPI set SPI_IOC_RD_BITS_PER_WORD [%d] failure: %s\n ", spi_ctx->bits, strerror(errno)); | |
| 174 | goto cleanup; | |
| 175 | } | |
| 176 | ret = ioctl(spi_ctx->fd, SPI_IOC_WR_BITS_PER_WORD, &spi_ctx->bits); | |
| 177 | if( ret < 0 ) | |
| 178 | { | |
| 179 | printf("ERROR: SPI set SPI_IOC_WR_BITS_PER_WORD [%d] failure: %s\n ", spi_ctx->bits, strerror(errno)); | |
| 180 | goto cleanup; | |
| 181 | } | |
| 182 | ||
| 183 | ret = ioctl(spi_ctx->fd, SPI_IOC_WR_MAX_SPEED_HZ, &spi_ctx->speed); | |
| 184 | if( ret == -1) | |
| 185 | { | |
| 186 | printf("ERROR: SPI set SPI_IOC_WR_MAX_SPEED_HZ [%d] failure: %s\n ", spi_ctx->speed, strerror(errno)); | |
| 187 | goto cleanup; | |
| 188 | } | |
| 189 | ret = ioctl(spi_ctx->fd, SPI_IOC_RD_MAX_SPEED_HZ, &spi_ctx->speed); | |
| 190 | if( ret == -1) | |
| 191 | { | |
| 192 | printf("ERROR: SPI set SPI_IOC_RD_MAX_SPEED_HZ [%d] failure: %s\n ", spi_ctx->speed, strerror(errno)); | |
| 193 | goto cleanup; | |
| 194 | } | |
| 195 | ||
| 196 | printf("spi mode: 0x%x\n", spi_ctx->mode); | |
| 197 | printf("bits per word: %d\n", spi_ctx->bits); | |
| 198 | printf("max speed: %d Hz (%d KHz)\n", spi_ctx->speed, spi_ctx->speed / 1000); | |
| 199 | ||
| 200 | return spi_ctx->fd; | |
| 201 | ||
| 202 | cleanup: | |
| 203 | close(spi_ctx->fd); | |
| 204 | return -1; | |
| 205 | } | |
