本文整理汇总了C++中i2c_smbus_read_byte函数的典型用法代码示例。如果您正苦于以下问题：C++ i2c_smbus_read_byte函数的具体用法？C++ i2c_smbus_read_byte怎么用？C++ i2c_smbus_read_byte使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。
在下文中一共展示了i2c_smbus_read_byte函数的20个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的C++代码示例。
示例1: pcf8591_read_channel
static int pcf8591_read_channel(struct device *dev, int channel)
{
u8 value;
struct i2c_client *client = to_i2c_client(dev);
struct pcf8591_data *data = i2c_get_clientdata(client);
mutex_lock(&data->update_lock);
if ((data->control & PCF8591_CONTROL_AICH_MASK) != channel) {
data->control = (data->control & ~PCF8591_CONTROL_AICH_MASK)
| channel;
i2c_smbus_write_byte(client, data->control);
/* The first byte transmitted contains the conversion code of
the previous read cycle. FLUSH IT! */
i2c_smbus_read_byte(client);
}
value = i2c_smbus_read_byte(client);
mutex_unlock(&data->update_lock);
if ((channel == 2 && input_mode == 2) ||
(channel != 3 && (input_mode == 1 || input_mode == 3)))
return (10 * REG_TO_SIGNED(value));
else
return (10 * value);
}
开发者ID:Claruarius，项目名称:stblinux-2.6.37，代码行数:27，代码来源:pcf8591.c
示例2: bh1780_measure
//[*]--------------------------------------------------------------------------------------------------[*]
static int bh1780_measure(struct bh1780_data *bh1780)
{
struct i2c_client *client = bh1780->client;
int low_data, high_data;
/* read light sensor data */
if(i2c_smbus_write_byte(bh1780->client, (BH1780_COMMAND_REG + BH1780_DATA_LOW_REG)) < 0) {
dev_err(&client->dev, "I2C write byte error: data=0x%02x\n", (BH1780_COMMAND_REG + BH1780_DATA_LOW_REG));
goto err;
}
if((low_data = i2c_smbus_read_byte(client)) < 0) {
dev_err(&client->dev, "I2C read byte error\n");
goto err;
}
if(i2c_smbus_write_byte(bh1780->client, (BH1780_COMMAND_REG + BH1780_DATA_HIGH_REG)) < 0) {
dev_err(&client->dev, "I2C write byte error: data=0x%02x\n", (BH1780_COMMAND_REG + BH1780_DATA_HIGH_REG));
goto err;
}
if((high_data = i2c_smbus_read_byte(client)) < 0) {
dev_err(&client->dev, "I2C read byte error\n");
goto err;
}
bh1780->light_data = BH1780_DATA_CAL(high_data, low_data);
err:
return 0;
}
开发者ID:tiagormk，项目名称:linux-vitamins-odroidxu，代码行数:31，代码来源:ioboard-bh1780.c
示例3: pcf8591_read_channel
static int pcf8591_read_channel(struct device *dev, int channel)
{
u8 value;
struct i2c_client *client = to_i2c_client(dev);
struct pcf8591_data *data = i2c_get_clientdata(client);
mutex_lock(&data->update_lock);
if ((data->control & PCF8591_CONTROL_AICH_MASK) != channel) {
data->control = (data->control & ~PCF8591_CONTROL_AICH_MASK)
| channel;
i2c_smbus_write_byte(client, data->control);
i2c_smbus_read_byte(client);
}
value = i2c_smbus_read_byte(client);
mutex_unlock(&data->update_lock);
if ((channel == 2 && input_mode == 2) ||
(channel != 3 && (input_mode == 1 || input_mode == 3)))
return 10 * REG_TO_SIGNED(value);
else
return 10 * value;
}
开发者ID:MiniBlu，项目名称:cm11_kernel_htc_msm8974a3ul，代码行数:25，代码来源:pcf8591.c
示例4: ds2482_w1_read_byte
/**
* Performs the read byte function.
*
* @param data The ds2482 channel pointer
* @return The value read
*/
static u8 ds2482_w1_read_byte(void *data)
{
struct ds2482_w1_chan *pchan = data;
struct ds2482_data *pdev = pchan->pdev;
int result;
mutex_lock(&pdev->access_lock);
/* Select the channel */
ds2482_wait_1wire_idle(pdev);
if (pdev->w1_count > 1)
ds2482_set_channel(pdev, pchan->channel);
/* Send the read byte command */
ds2482_send_cmd(pdev, DS2482_CMD_1WIRE_READ_BYTE);
/* Wait until 1WB == 0 */
ds2482_wait_1wire_idle(pdev);
/* Select the data register */
ds2482_select_register(pdev, DS2482_PTR_CODE_DATA);
/* Read the data byte */
result = i2c_smbus_read_byte(pdev->client);
mutex_unlock(&pdev->access_lock);
return result;
}
开发者ID:458941968，项目名称:mini2440-kernel-2.6.29，代码行数:35，代码来源:ds2482.c
示例5: mcsdl_prepare_program
static int mcsdl_prepare_program(void)
{
int i;
int ret = 0;
int read_data = 0;
uint8_t i2c_buffer[4] = {0x0F, /* isp program flash cmd */
0x00, /* isp program timing value 0 */
0x00, /* isp program timing value 1 */
0x78}; /* isp program timing value 2 */
/* Write Program timing information */
for(i=0; i<4; i++){
ret = i2c_smbus_write_byte(g_client, i2c_buffer[i]);
if( 0 != ret ){
printk("mcsdl Write Program timing information error\n");
return -1;
}
udelay(15);
}
udelay(500);
/* Read Result */
read_data = i2c_smbus_read_byte(g_client);
if (read_data != 0x8F) { /* 0x8F is prepare program flash OK status */
printk("mcsdl prepare program error\n");
return -1;
}
ndelay(100);
return 0;
}
开发者ID:Simo2553，项目名称:kernel_huawei_u8160，代码行数:31，代码来源:melfas_i2c_ts.c
示例6: qcikbd_work_handler
static void qcikbd_work_handler(struct work_struct *_work)
{
unsigned char scancode;
unsigned int keycode;
struct i2ckbd_drv_data *ikbd_drv_data =
container_of(_work, struct i2ckbd_drv_data, work);
struct i2c_client *ikbdclient = ikbd_drv_data->ki2c_client;
struct input_dev *ikbdev = ikbd_drv_data->qcikbd_dev;
scancode = i2c_smbus_read_byte(ikbdclient);
if (scancode == KEY_ACK_FA) {
return;
} else if (scancode == RC_KEY_FN) {
ikbd_drv_data->fn = 0x80; /* select keycode table > 0x7F */
} else {
ikbd_drv_data->key_down = 1;
if (scancode & RC_KEY_BREAK) {
ikbd_drv_data->key_down = 0;
if ((scancode & 0x7F) == RC_KEY_FN)
ikbd_drv_data->fn = 0;
}
keycode = on2_keycode[(scancode & 0x7F) | ikbd_drv_data->fn];
if (keycode != NOKEY) {
input_report_key(ikbdev,
keycode,
ikbd_drv_data->key_down);
input_sync(ikbdev);
}
}
}
开发者ID:ARRESS1，项目名称:kernel_samsung_europa，代码行数:33，代码来源:qci_kbd.c
示例7: l3g4200d_read_reg
static u8 l3g4200d_read_reg(struct i2c_client *client, u8 addr){
s32 err = i2c_smbus_write_byte(client,addr);
s32 val = i2c_smbus_read_byte(client);
return (u8) val;
}
开发者ID:paddureddy，项目名称:Free_elec_BBB_nfsroot，代码行数:7，代码来源:l3g4200d.c
示例8: main
int main (void){
int device_handle;
if ((device_handle = open("/dev/i2c-1", O_RDWR)) < 0){
printf("Error: Couldn't open device %d\n", device_handle);
return 1;
}
if (ioctl(device_handle, I2C_SLAVE, 4) < 0){
printf("Error: Couldn't find arduino on address!\n");
return 1;
}
char data[4] = {0x65, 0x66, 0x67, 0x68};
i2c_smbus_write_byte(device_handle, data[0]);
i2c_smbus_write_byte(device_handle, data[1]);
i2c_smbus_write_byte(device_handle, data[2]);
i2c_smbus_write_byte(device_handle, data[3]);
//write(device_handle, data, 4);
char b = i2c_smbus_read_byte(device_handle);
printf("%i\n",b);
close(device_handle);
return 0;
}
开发者ID:poweihuang17，项目名称:D-Spur，代码行数:25，代码来源:tk1_i2c_test.cpp
示例9: DS2482_send_and_get
/* Single byte -- assumes channel selection already done */
static GOOD_OR_BAD DS2482_send_and_get(FILE_DESCRIPTOR_OR_ERROR file_descriptor, const BYTE wr, BYTE * rd)
{
int read_back;
BYTE c;
/* Write data byte */
if (i2c_smbus_write_byte_data(file_descriptor, DS2482_CMD_1WIRE_WRITE_BYTE, wr) < 0) {
return gbBAD;
}
/* read status for done */
RETURN_BAD_IF_BAD( DS2482_readstatus(&c, file_descriptor, DS2482_1wire_write_usec) ) ;
/* Select the data register */
if (i2c_smbus_write_byte_data(file_descriptor, DS2482_CMD_SET_READ_PTR, DS2482_READ_DATA_REGISTER) < 0) {
return gbBAD;
}
/* Read the data byte */
read_back = i2c_smbus_read_byte(file_descriptor);
if (read_back < 0) {
return gbBAD;
}
rd[0] = (BYTE) read_back;
return gbGOOD;
}
开发者ID:GrandHsu，项目名称:iicontrollibs，代码行数:29，代码来源:ow_ds2482.c
示例10: ps5101_i2c_read
int ps5101_i2c_read(struct i2c_client *client, u8 reg, u8* value)
{
int ret;
if (!MHL_i2c_init) {
print_err("I2C not ready\n");
return -EIO;
}
ret = i2c_smbus_write_byte(client, reg);
if (ret < 0) {
print_err("Write reg 0x%02x error\n", reg);
return ret;
}
ret = i2c_smbus_read_byte(client);
if (ret < 0) {
print_err("I2C read fail\n");
return -EIO;
}
*value = ret & 0x000000ff;
return ret;
}
开发者ID:arshull，项目名称:GalaTab3_KK_Kernel_T310，代码行数:28，代码来源:ps5101.c
示例11: sii9234_i2c_read
u8 sii9234_i2c_read(struct i2c_client *client, u8 reg)
{
u8 ret;
if (!mhl_i2c_init) {
SII_DEV_DBG("I2C not ready");
return 0;
}
ret = i2c_smbus_write_byte(client, reg);
if (ret < 0) {
printk(KERN_ERR "%s() I2C cmd write error", __func__);
return -EIO;
}
ret = i2c_smbus_read_byte(client);
if (ret < 0) {
SII_DEV_DBG("i2c read fail");
return -EIO;
}
return ret;
}
开发者ID:mapleshadow，项目名称:kernel-olympus-3.1，代码行数:26，代码来源:sii9234.c
示例12: pure_sensord
static int pure_sensord(void *arg)
{
struct pure *p = arg;
int s, slow, shigh, sxor;
/* TODO: finish me! */
while (!kthread_should_stop()) {
set_current_state(TASK_INTERRUPTIBLE);
schedule();
pr_err("%s: running!\n", __func__);
s = i2c_smbus_read_byte(&p->client);
slow = (s & 0xf);
shigh = (s & 0xf0) >> 4;
sxor = slow ^ shigh;
/* TODO: this isn't entirely correct! */
if (sxor & 1) {
p->a = (slow & 1) ? 1 : 0;
complete(&p->ca);
}
if (sxor & 2) {
p->b = (slow & 2) ? 1 : 0;
complete(&p->cb);
}
}
return 0;
}
开发者ID:kanjiviroja，项目名称:documents，代码行数:29，代码来源:pure-driver-with-sensor-kthread.c
示例13: i2c_touchkey_read_byte
static int i2c_touchkey_read_byte(struct cypress_touchkey_devdata *devdata,
u8 *val)
{
int ret;
int retry = 2;
down(&i2c_sem);
while (true) {
ret = i2c_smbus_read_byte(devdata->client);
if (ret >= 0 ) {
*val = ret;
up(&i2c_sem);
return 0;
}
dev_err(&devdata->client->dev, "i2c read error\n");
if (!retry--)
break;
msleep(10);
}
up(&i2c_sem);
return ret;
}
开发者ID:AntonX，项目名称:android_kernel_gb_sgs4g，代码行数:26，代码来源:cypress-touchkey.c
示例14: clear_alert
static int clear_alert(struct tmon_info *data)
{
struct i2c_client *ara = data->ara;
int alrt_stat;
alrt_stat = i2c_smbus_read_byte(ara);
return 0;
}
开发者ID:1ee7，项目名称:linux_l4t_tx1，代码行数:8，代码来源:tmon-tmp411.c
示例15: mcsdl_enter_download_mode
static int mcsdl_enter_download_mode(void)
{
int i;
int ret = 0;
int read_data = 0;
uint8_t enter_code[14] = { 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 0, 0, 1, 1 };
/* CE set output and low */
ret = gpio_tlmm_config(GPIO_CFG(TS_RESET_GPIO, 0, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_2MA), GPIO_ENABLE);
ret = gpio_direction_output(TS_RESET_GPIO, 0);
/* config SCL/SDA output mode and set low */
ret = gpio_tlmm_config(GPIO_CFG(TS_SCL_GPIO, 0, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_2MA), GPIO_ENABLE);
ret = gpio_tlmm_config(GPIO_CFG(TS_SDA_GPIO, 0, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_2MA), GPIO_ENABLE);
ret = gpio_direction_output(TS_SCL_GPIO, 0);
ret = gpio_direction_output(TS_SDA_GPIO, 0);
/* INTR set output and low */
ret = gpio_tlmm_config(GPIO_CFG(TS_INT_GPIO, 0, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_2MA), GPIO_ENABLE);
ret = gpio_direction_output(TS_INT_GPIO, 0);
mdelay(100);
ret = gpio_direction_output(TS_RESET_GPIO, 1); /* CE set high */
ret = gpio_direction_output(TS_SDA_GPIO, 1); /* SDA set high */
mdelay(25); /* must delay 25msec */
/* input download mode single */
for (i=0; i<14; i++) {
if( enter_code[i] ){
ret = gpio_direction_output(TS_INT_GPIO, 1); /* INTR set high */
} else {
ret = gpio_direction_output(TS_INT_GPIO, 0); /* INTR set low */
}
ret = gpio_direction_output(TS_SCL_GPIO, 1); /* SCL set high */
udelay(15);
ret = gpio_direction_output(TS_SCL_GPIO, 0); /* SCL set low */
ret = gpio_direction_output(TS_INT_GPIO, 0); /* INTR set low */
udelay(100);
}
ret = gpio_direction_output(TS_SCL_GPIO, 1); /* SCL set high */
udelay(100);
ret = gpio_direction_output(TS_INT_GPIO, 1); /* INTR set high */
mdelay(1);
/* config I/O to i2c mode */
ret = gpio_tlmm_config(GPIO_CFG(TS_SCL_GPIO, 1, GPIO_INPUT, GPIO_NO_PULL, GPIO_2MA), GPIO_ENABLE);
ret = gpio_tlmm_config(GPIO_CFG(TS_SDA_GPIO, 1, GPIO_INPUT, GPIO_NO_PULL, GPIO_2MA), GPIO_ENABLE);
mdelay(1);
read_data = i2c_smbus_read_byte(g_client);
if (read_data != 0x55) { /* 0x55 is i2c slave ready status */
printk("mcsdl enter download mode error\n");
return -1;
}
return 0; /* success */
}
开发者ID:Simo2553，项目名称:kernel_huawei_u8160，代码行数:58，代码来源:melfas_i2c_ts.c
示例16: i2c_readbyte
int i2c_readbyte(int i2c_fd)
{
int byte;
if ((byte = i2c_smbus_read_byte(i2c_fd)) < 0) {
// perror("Failed to read byte from I2C slave");
return -1;
}
return byte;
}
开发者ID:MiddleMan5，项目名称:Project-Onyx-Quadruped，代码行数:9，代码来源:i2c.c
示例17: mraa_i2c_read_byte
uint8_t
mraa_i2c_read_byte(mraa_i2c_context dev)
{
uint8_t byte = i2c_smbus_read_byte(dev->fh);
if (byte < 0) {
return -1;
}
return byte;
}
开发者ID:dinuand，项目名称:mraa，代码行数:9，代码来源:i2c.c
示例18: gw_pld_get8
static int gw_pld_get8(struct gpio_chip *gc, unsigned offset)
{
struct gw_pld *gw = gpiochip_get_data(gc);
s32 val;
val = i2c_smbus_read_byte(gw->client);
return (val < 0) ? 0 : !!(val & BIT(offset));
}
开发者ID:Anjali05，项目名称:linux，代码行数:9，代码来源:gpio-gw-pld.c
示例19: tegra_camera_dump_port_switch_regs
static void tegra_camera_dump_port_switch_regs(struct nvhost_device *ndev)
{
#ifdef DEBUG
u8 val;
val = i2c_smbus_read_byte(port_switch);
dev_info(&ndev->dev, "I2C switch reg = 0x%02x\n", val);
#endif
}
开发者ID:Kernelhacker，项目名称:2.6.38.3-Adam，代码行数:9，代码来源:board-seaboard-sensors.c
示例20: sensor_read
__u8 sensor_read(__u8 uRegAddr)
{
u8 val;
//printk("sensor_read i2c_smbus_read_byte uRegAddr=0x%x\n",uRegAddr);
i2c_smbus_write_byte(save_client, uRegAddr);
//printk("sensor_read i2c_smbus_write_byte\n");
val = i2c_smbus_read_byte(save_client);
return val;
}
开发者ID:mfkiwl，项目名称:linux-3.10.y，代码行数:9，代码来源:sensor_ov7725.c
注：本文中的i2c_smbus_read_byte函数示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。 |
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