89005438bc
Add a shell to interact with I2C devices. Currently scanning for devices
is supported. Example output:
uart:~$ i2c scan I2C_1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- 18 -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: 40 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
2 devices found on I2C_1
uart:~$ i2c scan I2C_3
i2c - I2C commands
Subcommands:
I2C_1 :I2C_1
I2C_2 :I2C_2
uart:~$ i2c scan I2C_2
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- 1e --
20: -- -- -- -- -- -- -- -- -- 29 -- -- -- 2d -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- 56 -- -- -- -- -- -- 5d -- 5f
60: -- -- -- -- -- -- -- -- -- -- 6a -- -- -- -- --
70: -- -- -- -- -- -- -- --
7 devices found on I2C_2
This shell is based on the a sample that did the same thing and was
limited in support. The sample is now removed in favour of this generic
shell module.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
103 lines
2.4 KiB
C
103 lines
2.4 KiB
C
/*
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* Copyright (c) 2018 Prevas A/S
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <shell/shell.h>
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#include <stdlib.h>
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#include <i2c.h>
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#include <string.h>
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#include <sys/util.h>
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#include <logging/log.h>
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LOG_MODULE_REGISTER(i2c_shell, CONFIG_LOG_DEFAULT_LEVEL);
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#define I2C_DEVICE_PREFIX "I2C_"
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extern struct device __device_init_start[];
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extern struct device __device_init_end[];
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static int cmd_i2c_scan(const struct shell *shell,
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size_t argc, char **argv)
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{
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struct device *dev;
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u8_t cnt = 0, first = 0x04, last = 0x77;
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dev = device_get_binding(argv[1]);
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if (!dev) {
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shell_error(shell, "I2C: Device driver %s not found.",
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argv[1]);
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return -ENODEV;
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}
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shell_print(shell,
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" 0 1 2 3 4 5 6 7 8 9 a b c d e f");
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for (u8_t i = 0; i <= last; i += 16) {
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shell_fprintf(shell, SHELL_NORMAL, "%02x: ", i);
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for (u8_t j = 0; j < 16; j++) {
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if (i + j < first || i + j > last) {
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shell_fprintf(shell, SHELL_NORMAL, " ");
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continue;
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}
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struct i2c_msg msgs[1];
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u8_t dst;
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/* Send the address to read from */
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msgs[0].buf = &dst;
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msgs[0].len = 0U;
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msgs[0].flags = I2C_MSG_WRITE | I2C_MSG_STOP;
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if (i2c_transfer(dev, &msgs[0], 1, i + j) == 0) {
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shell_fprintf(shell, SHELL_NORMAL,
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"%02x ", i + j);
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++cnt;
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} else {
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shell_fprintf(shell, SHELL_NORMAL, "-- ");
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}
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}
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shell_print(shell, "");
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}
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shell_print(shell, "%u devices found on %s",
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cnt, argv[1]);
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return 0;
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}
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static void device_name_get(size_t idx, struct shell_static_entry *entry);
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SHELL_DYNAMIC_CMD_CREATE(dsub_device_name, device_name_get);
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static void device_name_get(size_t idx, struct shell_static_entry *entry)
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{
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int device_idx = 0;
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struct device *dev;
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entry->syntax = NULL;
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entry->handler = NULL;
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entry->help = NULL;
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entry->subcmd = &dsub_device_name;
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for (dev = __device_init_start; dev != __device_init_end; dev++) {
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if ((dev->driver_api != NULL) &&
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strstr(dev->config->name, I2C_DEVICE_PREFIX) != NULL &&
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strcmp(dev->config->name, "") && (dev->config->name != NULL)) {
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if (idx == device_idx) {
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entry->syntax = dev->config->name;
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break;
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}
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device_idx++;
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}
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}
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}
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SHELL_STATIC_SUBCMD_SET_CREATE(sub_i2c_cmds,
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SHELL_CMD(scan, &dsub_device_name,
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"Scan I2C devices", cmd_i2c_scan),
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SHELL_SUBCMD_SET_END /* Array terminated. */
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);
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SHELL_CMD_REGISTER(i2c, &sub_i2c_cmds, "I2C commands", NULL);
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