* apps/testing/drivers/drivertest/drivertest_i2c_write.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you 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.
*
****************************************************************************/
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/i2c/i2c_master.h>
#include <sys/ioctl.h>
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <poll.h>
#include <pthread.h>
* Pre-processor Definitions
****************************************************************************/
#define GET_I2C_SLAVE_ADDR 0x8
#define GET_I2C_FRE 400000
#define GET_I2C_SLAVE_PATH "/dev/i2cslv0"
#define GET_I2C_MASTER_PATH "/dev/i2c0"
#define SIZE_OF_BUFFER 4
#define COUNT_OF_TEST 100
#define I2C_PATH_MAX 512
#ifndef CONFIG_I2C_SLAVE_WRITEBUFSIZE
# define GET_I2C_WRITEBUFSIZE SIZE_OF_BUFFER
#else
# define GET_I2C_WRITEBUFSIZE CONFIG_I2C_SLAVE_WRITEBUFSIZE
#endif
* Private Types
****************************************************************************/
struct i2c_state_s
{
char pathname_master[I2C_PATH_MAX];
char pathname_slave[I2C_PATH_MAX];
uint16_t addr;
uint32_t frequency;
int master_fd;
int slave_fd;
};
static struct i2c_state_s g_i2cwrite =
{
.pathname_master = GET_I2C_MASTER_PATH,
.pathname_slave = GET_I2C_SLAVE_PATH,
.addr = GET_I2C_SLAVE_ADDR,
.frequency = GET_I2C_FRE,
};
* Private Functions
****************************************************************************/
* Name: i2c_information
****************************************************************************/
static void i2c_information(FAR struct i2c_state_s *i2c_state)
{
printf(" [masterpath] selects the I2C Master device.\n"
" Default: %s Current: %s\n",
GET_I2C_MASTER_PATH, i2c_state->pathname_master);
printf(" [slavepath] selects the I2C Slave device.\n"
" Default: %s Current: %s\n",
GET_I2C_SLAVE_PATH, i2c_state->pathname_slave);
printf(" [frequency] selects the I2C frequency.\n"
" Default: %d Current: %ld\n",
GET_I2C_FRE, i2c_state->frequency);
printf(" [slaveAddress] the address of i2c Slave, Convert to decimal.\n"
" Default: %d Current: %d\n",
GET_I2C_SLAVE_ADDR, i2c_state->addr);
}
* Name: show_usage
****************************************************************************/
static void show_usage(FAR const char *progname,
FAR struct i2c_state_s *i2c_state, int exitcode)
{
printf("Usage: %s"
"<masterpath> <slavepath> <frequency> <slaveAddress> \n", progname);
i2c_information(i2c_state);
exit(exitcode);
}
* Name: parse_commandline
****************************************************************************/
static void parse_commandline(FAR struct i2c_state_s *i2c_state,
int argc, FAR char **argv)
{
int converted;
int ch = 1;
while (ch < argc)
{
switch (ch)
{
case 1:
strlcpy(i2c_state->pathname_master, argv[1],
sizeof(i2c_state->pathname_master));
break;
case 2:
strlcpy(i2c_state->pathname_slave, argv[2],
sizeof(i2c_state->pathname_slave));
break;
case 3:
converted = atoi(argv[3]);
if (converted < 1 || converted > INT_MAX)
{
printf("signal out of range: %d\n", converted);
show_usage(argv[3], i2c_state, EXIT_FAILURE);
}
i2c_state->frequency = (uint32_t)converted;
break;
case 4:
converted = atoi(argv[4]);
if (converted < 1 || converted > INT_MAX)
{
printf("signal out of range: %d\n", converted);
show_usage(argv[4], i2c_state, EXIT_FAILURE);
}
i2c_state->addr = (uint16_t)converted;
break;
default:
printf("input error parameter\n");
break;
}
ch += 1;
}
}
* master write iic
****************************************************************************/
static int master_write_i2c(int fd, int num)
{
struct i2c_transfer_s i2c_transfer;
uint8_t buffer[SIZE_OF_BUFFER];
struct i2c_msg_s i2c_msg[1];
int ret;
int i;
if (SIZE_OF_BUFFER > GET_I2C_WRITEBUFSIZE)
{
printf("test buffer size %d bigger than slave_writebufsize %d\n", \
SIZE_OF_BUFFER, GET_I2C_WRITEBUFSIZE);
return -1;
}
for (i = 0; i < SIZE_OF_BUFFER; i++)
{
buffer[i] = i + num;
}
i2c_msg[0].addr = g_i2cwrite.addr;
i2c_msg[0].flags = 0;
i2c_msg[0].buffer = buffer;
i2c_msg[0].length = SIZE_OF_BUFFER;
i2c_msg[0].frequency = g_i2cwrite.frequency;
i2c_transfer.msgv = (struct i2c_msg_s *)i2c_msg;
i2c_transfer.msgc = 1;
ret = ioctl(fd, I2CIOC_TRANSFER, (unsigned long)&i2c_transfer);
if (ret < 0)
{
printf("write_i2c failed\n");
}
printf("master write \t");
for (i = 0; i < SIZE_OF_BUFFER; i++)
{
printf("%d\t", buffer[i]);
}
printf("\n");
return ret;
}
* slave poll read
****************************************************************************/
static FAR void *slave_read_thread(FAR void *arg)
{
char buffer[SIZE_OF_BUFFER];
struct pollfd rfds;
int icount = 0;
int size;
int i;
rfds.fd = g_i2cwrite.slave_fd;
rfds.events = POLLIN;
rfds.revents = 0;
while (icount <= COUNT_OF_TEST)
{
int n = poll(&rfds, 1, -1);
if (n == 0)
{
printf("time out\n");
continue;
}
if (n < 0)
{
printf("poll err n= %d\n", n);
continue;
}
if (rfds.revents == POLLIN)
{
size = read(rfds.fd, buffer, sizeof(buffer));
printf("read size = %d\n", size);
assert(size == SIZE_OF_BUFFER);
printf("slave poll read \t");
for (i = 0; i < SIZE_OF_BUFFER; i++)
{
printf("%d\t", buffer[i]);
}
printf("\n");
}
icount += 1;
}
pthread_exit(NULL);
}
* master poll write
****************************************************************************/
static FAR void *master_write_thread(FAR void *arg)
{
int count = 0;
int i = 0;
while (count <= COUNT_OF_TEST)
{
sleep(1);
master_write_i2c(g_i2cwrite.master_fd, i++);
count += 1;
}
pthread_exit(NULL);
}
* test_i2c_write_main
****************************************************************************/
* Name: main
****************************************************************************/
int main(int argc, FAR char *argv[])
{
pthread_t t_id1;
pthread_t t_id2;
if (argc != 5)
{
printf("Error input\n");
printf("Command: cmocka_driver_i2c_master \
<masterpath> <slavepath> <frequency> <slaveAddress> \n");
return -1;
}
parse_commandline(&g_i2cwrite, argc, argv);
i2c_information(&g_i2cwrite);
g_i2cwrite.master_fd = open(g_i2cwrite.pathname_master, O_RDWR);
if (g_i2cwrite.master_fd < 0)
{
printf("open iic master failed\n");
return -1;
}
g_i2cwrite.slave_fd = open(g_i2cwrite.pathname_slave, O_RDWR);
if (g_i2cwrite.slave_fd < 0)
{
close(g_i2cwrite.master_fd);
printf("open iic slave failed\n");
return -1;
}
if (pthread_create(&t_id1, NULL, slave_read_thread, NULL) < 0)
{
close(g_i2cwrite.master_fd);
close(g_i2cwrite.slave_fd);
printf("slave_read_thread create failed\n");
return -1;
}
if (pthread_create(&t_id2, NULL, master_write_thread, NULL) < 0)
{
close(g_i2cwrite.master_fd);
close(g_i2cwrite.slave_fd);
printf("master_write_thread create failed\n");
return -1;
}
pthread_join(t_id1, NULL);
pthread_join(t_id2, NULL);
close(g_i2cwrite.master_fd);
close(g_i2cwrite.slave_fd);
printf("i2c write test end\n");
return 0;
}