/* I2C receiving of bytes - does not send an offset byte */
int efx_i2c_recv_bytes(struct efx_i2c_interface *i2c, u8 device_id,
u8 *bytes, unsigned int len)
{
int i;
int rc;
EFX_WARN_ON_PARANOID(getsda(i2c) != 1);
EFX_WARN_ON_PARANOID(getscl(i2c) != 1);
EFX_WARN_ON_PARANOID(len < 1);
/* Select device */
i2c_start(i2c);
/* Read data from device */
rc = i2c_send_byte(i2c, i2c_read_cmd(device_id));
if (rc)
goto out;
for (i = 0; i < (len - 1); i++)
/* Read and acknowledge all but the last byte */
bytes[i] = i2c_recv_byte(i2c, 1);
/* Read last byte with no acknowledgement */
bytes[i] = i2c_recv_byte(i2c, 0);
out:
i2c_stop(i2c);
i2c_release(i2c);
return rc;
}
int max77620_regulator_get_status(u32 id)
{
if (id > REGULATOR_MAX)
return 0;
const max77620_regulator_t *reg = &_pmic_regulators[id];
if (reg->type == REGULATOR_SD)
return (i2c_recv_byte(I2C_5, 0x3C, MAX77620_REG_STATSD) & reg->status_mask) ? 0 : 1;
return (i2c_recv_byte(I2C_5, 0x3C, reg->cfg_addr) & 8) ? 1 : 0;
}
bool lidar_read_register(const uint8_t reg, const uint8_t length, uint8_t *data) {
__disable_irq();
i2c_start();
if(!i2c_send_byte((I2C_ADDRESS << 1) | I2C_WRITE)) {
i2c_stop();
__enable_irq();
return false;
}
if(!i2c_send_byte(length > 1 ? (reg | CONTINOUS_RW) : reg)) {
i2c_stop();
__enable_irq();
return false;
}
i2c_stop();
i2c_start();
if(!i2c_send_byte((I2C_ADDRESS << 1) | I2C_READ)) {
i2c_stop();
__enable_irq();
return false;
}
for(uint8_t i = 0; i < length; i++) {
data[i] = i2c_recv_byte(i != (length - 1));
}
i2c_stop();
__enable_irq();
return true;
}
/*----------------------------------------------------------------------------*/
uint8_t i2c_receive() {
while(rx_byte_ctr > 0) {
// busy wait
while(!(*I2CSR & I2C_MCF) || !(*I2CSR & I2C_MIF)) /*wait*/;
if (rx_byte_ctr == 1) { // receiving next-to-last byte, thus turn off auto-ack for stop condition
*I2CCR |= I2C_TXAK;
}
if (*I2CSR & I2C_MCF) {
i2c_recv_byte(); // read new byte
}
if (*I2CSR & I2C_MAL) {
*I2CSR &= ~I2C_MAL; // should be cleared in software
printf("*** ERROR I2C: Arbitration lost\n");
// Arbitration lost; ERROR?
}
}
while(!(*I2CSR & I2C_MCF) || !(*I2CSR & I2C_MIF)) /*wait*/;
if (*I2CSR & I2C_RXAK) {
// NO acknoledge byte received
printf("*** ERROR I2C: No ack received\n");
}
if (*I2CSR & I2C_MAL) {
*I2CSR &= ~I2C_MAL; // should be cleared in software
printf("*** ERROR I2C: Arbitration lost\n");
// Arbitration lost; ERROR?
}
*I2CCR &= ~I2C_MSTA; // stop condition
}
unsigned char CurrentRead24c512(void)
{
unsigned char dat;
i2c_start() ;
i2c_send_byte(0xA1);
dat = i2c_recv_byte();
return dat;
}
u32 btn_read()
{
u32 res = 0;
if (!gpio_read(GPIO_PORT_X, GPIO_PIN_7))
res |= BTN_VOL_DOWN;
if (!gpio_read(GPIO_PORT_X, GPIO_PIN_6))
res |= BTN_VOL_UP;
if (i2c_recv_byte(4, 0x3C, 0x15) & 0x4)
res |= BTN_POWER;
return res;
}
void max77620_config_default()
{
for (u32 i = 1; i <= REGULATOR_MAX; i++)
{
i2c_recv_byte(I2C_5, 0x3C, MAX77620_REG_CID4);
max77620_regulator_config_fps(i);
max77620_regulator_set_voltage(i, _pmic_regulators[i].mv_default);
if (_pmic_regulators[i].fps_src != MAX77620_FPS_SRC_NONE)
max77620_regulator_enable(i, 1);
}
i2c_send_byte(I2C_5, 0x3C, MAX77620_REG_SD_CFG2, 4);
}
unsigned char mpu_read_byte(unsigned char addr){
unsigned char dat;
i2c_start();
i2c_send_byte(SlaveAddress); //Address for mpu6050
i2c_send_byte(addr); //Address for register
i2c_start();
i2c_send_byte(SlaveAddress+1); //Address for mpu6050
dat=i2c_recv_byte();
i2c_ack();
i2c_stop();
return dat;
}
unsigned char RandomRead24c512(unsigned char faddr,
unsigned char saddr)
{
unsigned char dat;
i2c_start() ;
i2c_send_byte(0xA0);
i2c_send_byte(faddr);
i2c_send_byte(saddr);
i2c_start() ;
i2c_send_byte(0xA1);
dat = i2c_recv_byte();
i2c_stop() ;
return dat;
}
int max77620_regulator_set_voltage(u32 id, u32 mv)
{
if (id > REGULATOR_MAX)
return 0;
const max77620_regulator_t *reg = &_pmic_regulators[id];
if (mv < reg->mv_default || mv > reg->mv_max)
return 0;
u32 mult = (mv + reg->mv_step - 1 - reg->mv_min) / reg->mv_step;
u8 val = i2c_recv_byte(I2C_5, 0x3C, reg->volt_addr);
val = (val & ~reg->volt_mask) | (mult & reg->volt_mask);
i2c_send_byte(I2C_5, 0x3C, reg->volt_addr, val);
sleep(1000);
return 1;
}
int max77620_regulator_enable(u32 id, int enable)
{
if (id > REGULATOR_MAX)
return 0;
const max77620_regulator_t *reg = &_pmic_regulators[id];
u32 addr = reg->type == REGULATOR_SD ? reg->cfg_addr : reg->volt_addr;
u8 val = i2c_recv_byte(I2C_5, 0x3C, addr);
if (enable)
val = (val & ~reg->enable_mask) | ((3 << reg->enable_shift) & reg->enable_mask);
else
val &= ~reg->enable_mask;
i2c_send_byte(I2C_5, 0x3C, addr, val);
sleep(1000);
return 1;
}
/**********************************************************************
functionName:void pcf8563_get(uint8_t start,uint8_t num,uint8_t *buf)
description:获取数据
**********************************************************************/
void pcf8563_get(uint8_t start,uint8_t num,uint8_t *buf)
{
uint8_t i;
i2_start();
i2c_sendbyte(0xA2);
i2c_wait_ack();
i2c_sendbyte(start);
i2c_wait_ack();
i2_start();
i2c_sendbyte(0xA3);
i2c_wait_ack();
for (i=0;i<num;i++)
{
buf[i]=i2c_recv_byte();
if (i!=(num-1)) i2c_send_ack();
}
i2c_send_notack();
i2_stop();
}
void i2c_isr (void) {
uint8_t dummy;
if (*I2CSR & I2C_MIF) { // interrupt is from i2c
if (*I2CSR & I2C_MCF) { // one byte transferred/received. will be cleared automatically when I2CDR is written or I2CSR read
if (tx_buf_ptr != 0) { // we're sending
if (*I2CSR & I2C_RXAK) {
// NO acknoledge byte received
printf("*** ERROR I2C: No ack received\n");
}
if (tx_byte_ctr > 0) { // tx
i2c_send_byte(); // set new byte, MCF is automatically cleared
} else {
*I2CCR &= ~I2C_MSTA; // generate stop condition
}
} else { //if (rx_buf_ptr != 0) { // receive
if (rx_byte_ctr == 1) { // receiving next-to-last byte, thus turn off auto-ack for stop condition
*I2CCR |= I2C_TXAK;
}
if (*I2CCR & I2C_MTX) { // address byte was just sent
*I2CCR &= ~I2C_MTX; // switch to receive mode
dummy = *I2CDR; // dummy read to throw away the address from register
} else if (rx_byte_ctr > 0) {
i2c_recv_byte(); // read new byte
} else {
*I2CCR &= ~I2C_MSTA; // generate stop condition
}
}
}
if (*I2CSR & I2C_MAL) {
*I2CSR &= ~I2C_MAL; // should be cleared in software
printf("*** ERROR I2C: Arbitration lost\n");
// Arbitration lost; reset..
rx_byte_ctr = tx_byte_ctr = 0;
*I2CCR &= ~I2C_MSTA; // generate stop condition
}
// clear MIF
*I2CSR &= ~I2C_MIF;
}
}
unsigned char i2c_read(unsigned char dev,
unsigned char reg,
unsigned char length,
unsigned char * data)
{
unsigned char i ;
i2c_start() ;
i2c_send_byte(dev) ;
i2c_send_byte(reg) ;
i2c_start() ;
i2c_send_byte(dev + 1) ;
for(i = 0; i < length; i ++)
{
data[i] = i2c_recv_byte() ;
if(i == length-1)
i2c_send_ack(_NACK) ;
else
i2c_send_ack(_ACK) ;
}
i2c_stop() ;
return 0 ;
}
void SequentialRead24c512(unsigned char faddr,
unsigned char saddr,
unsigned char *dat,
unsigned char num)
{
unsigned char i;
i2c_start();
i2c_send_byte(0xA0);
i2c_send_byte(faddr);
i2c_send_byte(saddr);
i2c_start() ;
i2c_send_byte(0xA1);
for(i=0;i<num;i++)
{
dat[i] = i2c_recv_byte();
if(i == num-1)
i2c_send_ack(_NACK) ;
else
i2c_send_ack(_ACK) ;
}
i2c_stop();
}
static int saa7134_i2c_xfer(struct i2c_adapter *i2c_adap,
struct i2c_msg *msgs, int num)
{
struct saa7134_dev *dev = i2c_adap->algo_data;
enum i2c_status status;
unsigned char data;
int addr,rc,i,byte;
status = i2c_get_status(dev);
if (!i2c_is_idle(status))
if (!i2c_reset(dev))
return -EIO;
d2printk("start xfer\n");
d1printk(KERN_DEBUG "%s: i2c xfer:",dev->name);
for (i = 0; i < num; i++) {
if (!(msgs[i].flags & I2C_M_NOSTART) || 0 == i) {
/* send address */
d2printk("send address\n");
addr = msgs[i].addr << 1;
if (msgs[i].flags & I2C_M_RD)
addr |= 1;
if (i > 0 && msgs[i].flags & I2C_M_RD) {
/* workaround for a saa7134 i2c bug
* needed to talk to the mt352 demux
* thanks to pinnacle for the hint */
int quirk = 0xfd;
d1printk(" [%02x quirk]",quirk);
i2c_send_byte(dev,START,quirk);
i2c_recv_byte(dev);
}
d1printk(" < %02x", addr);
rc = i2c_send_byte(dev,START,addr);
if (rc < 0)
goto err;
}
if (msgs[i].flags & I2C_M_RD) {
/* read bytes */
d2printk("read bytes\n");
for (byte = 0; byte < msgs[i].len; byte++) {
d1printk(" =");
rc = i2c_recv_byte(dev);
if (rc < 0)
goto err;
d1printk("%02x", rc);
msgs[i].buf[byte] = rc;
}
} else {
/* write bytes */
d2printk("write bytes\n");
for (byte = 0; byte < msgs[i].len; byte++) {
data = msgs[i].buf[byte];
d1printk(" %02x", data);
rc = i2c_send_byte(dev,CONTINUE,data);
if (rc < 0)
goto err;
}
}
}
d2printk("xfer done\n");
d1printk(" >");
i2c_set_attr(dev,STOP);
rc = -EIO;
if (!i2c_is_busy_wait(dev))
goto err;
status = i2c_get_status(dev);
if (i2c_is_error(status))
goto err;
/* ensure that the bus is idle for at least one bit slot */
msleep(1);
d1printk("\n");
return num;
err:
if (1 == i2c_debug) {
status = i2c_get_status(dev);
printk(" ERROR: %s\n",str_i2c_status[status]);
}
return rc;
}
static int saa7134_i2c_xfer(struct i2c_adapter *i2c_adap,
struct i2c_msg *msgs, int num)
{
struct saa7134_dev *dev = i2c_adap->algo_data;
enum i2c_status status;
unsigned char data;
int addr,rc,i,byte;
status = i2c_get_status(dev);
if (!i2c_is_idle(status))
if (!i2c_reset(dev))
return -EIO;
d2printk("start xfer\n");
d1printk(KERN_DEBUG "%s: i2c xfer:",dev->name);
for (i = 0; i < num; i++) {
if (!(msgs[i].flags & I2C_M_NOSTART) || 0 == i) {
d2printk("send address\n");
addr = msgs[i].addr << 1;
if (msgs[i].flags & I2C_M_RD)
addr |= 1;
if (i > 0 && msgs[i].flags &
I2C_M_RD && msgs[i].addr != 0x40 &&
msgs[i].addr != 0x19) {
int quirk = 0xfe;
d1printk(" [%02x quirk]",quirk);
i2c_send_byte(dev,START,quirk);
i2c_recv_byte(dev);
}
d1printk(" < %02x", addr);
rc = i2c_send_byte(dev,START,addr);
if (rc < 0)
goto err;
}
if (msgs[i].flags & I2C_M_RD) {
d2printk("read bytes\n");
for (byte = 0; byte < msgs[i].len; byte++) {
d1printk(" =");
rc = i2c_recv_byte(dev);
if (rc < 0)
goto err;
d1printk("%02x", rc);
msgs[i].buf[byte] = rc;
}
if (0x19 == msgs[i].addr) {
d1printk(" ?");
rc = i2c_recv_byte(dev);
if (rc < 0)
goto err;
d1printk("%02x", rc);
}
} else {
d2printk("write bytes\n");
for (byte = 0; byte < msgs[i].len; byte++) {
data = msgs[i].buf[byte];
d1printk(" %02x", data);
rc = i2c_send_byte(dev,CONTINUE,data);
if (rc < 0)
goto err;
}
}
}
d2printk("xfer done\n");
d1printk(" >");
i2c_set_attr(dev,STOP);
rc = -EIO;
if (!i2c_is_busy_wait(dev))
goto err;
status = i2c_get_status(dev);
if (i2c_is_error(status))
goto err;
msleep(1);
d1printk("\n");
return num;
err:
if (1 == i2c_debug) {
status = i2c_get_status(dev);
printk(" ERROR: %s\n",str_i2c_status[status]);
}
return rc;
}
static int saa7134_i2c_xfer(struct i2c_adapter *i2c_adap,
struct i2c_msg *msgs, int num)
{
struct saa7134_dev *dev = i2c_adap->algo_data;
enum i2c_status status;
unsigned char data;
int addr,rc,i,byte;
status = i2c_get_status(dev);
if (!i2c_is_idle(status))
if (!i2c_reset(dev))
return -EIO;
i2c_dbg(2, "start xfer\n");
i2c_dbg(1, "i2c xfer:");
for (i = 0; i < num; i++) {
if (!(msgs[i].flags & I2C_M_NOSTART) || 0 == i) {
/* send address */
i2c_dbg(2, "send address\n");
addr = msgs[i].addr << 1;
if (msgs[i].flags & I2C_M_RD)
addr |= 1;
if (i > 0 && msgs[i].flags &
I2C_M_RD && msgs[i].addr != 0x40 &&
msgs[i].addr != 0x41 &&
msgs[i].addr != 0x19) {
/* workaround for a saa7134 i2c bug
* needed to talk to the mt352 demux
* thanks to pinnacle for the hint */
int quirk = 0xfe;
i2c_cont(1, " [%02x quirk]", quirk);
i2c_send_byte(dev,START,quirk);
i2c_recv_byte(dev);
}
i2c_cont(1, " < %02x", addr);
rc = i2c_send_byte(dev,START,addr);
if (rc < 0)
goto err;
}
if (msgs[i].flags & I2C_M_RD) {
/* read bytes */
i2c_dbg(2, "read bytes\n");
for (byte = 0; byte < msgs[i].len; byte++) {
i2c_cont(1, " =");
rc = i2c_recv_byte(dev);
if (rc < 0)
goto err;
i2c_cont(1, "%02x", rc);
msgs[i].buf[byte] = rc;
}
/* discard mysterious extra byte when reading
from Samsung S5H1411. i2c bus gets error
if we do not. */
if (0x19 == msgs[i].addr) {
i2c_cont(1, " ?");
rc = i2c_recv_byte(dev);
if (rc < 0)
goto err;
i2c_cont(1, "%02x", rc);
}
} else {
/* write bytes */
i2c_dbg(2, "write bytes\n");
for (byte = 0; byte < msgs[i].len; byte++) {
data = msgs[i].buf[byte];
i2c_cont(1, " %02x", data);
rc = i2c_send_byte(dev,CONTINUE,data);
if (rc < 0)
goto err;
}
}
}
i2c_dbg(2, "xfer done\n");
i2c_cont(1, " >");
i2c_set_attr(dev,STOP);
rc = -EIO;
if (!i2c_is_busy_wait(dev))
goto err;
status = i2c_get_status(dev);
if (i2c_is_error(status))
goto err;
/* ensure that the bus is idle for at least one bit slot */
msleep(1);
i2c_cont(1, "\n");
return num;
err:
if (1 == i2c_debug) {
status = i2c_get_status(dev);
i2c_cont(1, " ERROR: %s\n", str_i2c_status[status]);
}
return rc;
}
