LOCAL void ICACHE_FLASH_ATTR
read_cb(void)
{
uint8_t ack, low, high;
wdt_feed();
os_printf("Time=%ld\n", system_get_time());
i2c_master_start();
i2c_master_writeByte(BH1750_ADDR);
ack = i2c_master_getAck();
if (ack)
{
os_printf("I2C:No ack after sending address\n");
i2c_master_stop();
return;
}
i2c_master_stop();
i2c_master_wait(40000); // why?
i2c_master_start();
i2c_master_writeByte(BH1750_ADDR + 1);
ack = i2c_master_getAck();
if (ack)
{
os_printf("I2C:No ack after write command\n");
i2c_master_stop();
return;
}
low = i2c_master_readByte();
high = i2c_master_readByte();
i2c_master_setAck(1);
i2c_master_stop();
os_printf("I2C:read(L/H)=(0x%02x/0x%02x)\n", low, high);
}
// read a number of bytes from the rtc over i2c
// returns true to indicate success
static bool ICACHE_FLASH_ATTR ds1307_recv(uint8 *data, uint8 len) {
int loop;
// signal i2c start
i2c_master_start();
// write address & direction
i2c_master_writeByte((uint8)((DS1307_ADDR << 1) | 1));
if (!i2c_master_checkAck()) {
//uart0_send("i2c error3\r\n");
i2c_master_stop();
return false;
}
// read bytes
for (loop = 0; loop < len; loop++) {
data[loop] = i2c_master_readByte();
// send ack (except after last byte, then we send nack)
if (loop < (len - 1)) i2c_master_send_ack(); else i2c_master_send_nack();
}
// signal i2c stop
i2c_master_stop();
return true;
}
LOCAL i2c_status ICACHE_FLASH_ATTR io2_acp_execute(uint8 address, uint8 command, uint16 *data) {
uint8 d[2];
i2c_master_start();
/* Send address */
i2c_master_writeByte(address << 1 | 0);
if (i2c_master_getAck()) {
i2c_master_stop();
return I2C_ADDRESS_NACK;
}
/* Send command */
i2c_master_writeByte(command);
if (i2c_master_getAck()) {
goto error;
}
i2c_master_stop();
i2c_master_start();
/* Send address */
i2c_master_writeByte(address << 1 | 1);
if (i2c_master_getAck()) {
i2c_master_stop();
return I2C_ADDRESS_NACK;
}
/* Read data */
d[0] = i2c_master_readByte();
i2c_master_send_ack();
d[1] = i2c_master_readByte();
i2c_master_send_nack();
i2c_master_stop();
*data = 256 * d[1] + d[0];
return I2C_OK;
error: i2c_master_stop();
return I2C_DATA_NACK;
}
bool ICACHE_FLASH_ATTR
mcp3221_read(uint8 addr, uint16 *pData)
{
uint8 ack;
i2c_master_start();
i2c_master_writeByte(addr);
// reading ack, should be 0
ack = i2c_master_getAck();
if (ack != 0) {
DEBUG("addr not ack when tx write cmd, line %d\n", __LINE__);
i2c_master_stop();
return false;
}
// reading high byte, first 4 bit should be zero
uint8 temp = i2c_master_readByte();
if ((temp | 0x0f) != 0x0f) {
DEBUG("wrong reading\n");
return false;
}
*pData = temp*256;
// return ack 0 for high byte
i2c_master_setAck(0);
// reading low byte
temp = i2c_master_readByte();
*pData += temp;
// return ack 1 for lower byte
i2c_master_setAck(1);
// stop, we dont need continuous reading
i2c_master_stop();
return true;
}
static bool ICACHE_FLASH_ATTR byteReadNoReg(uint8_t adr, uint8_t data[], uint8_t length){
uint8_t i;
i2c_master_start();
i2c_master_writeByte((uint8_t)((adr << 1) | 1));
if (!i2c_master_checkAck()) {
i2c_master_stop();
return false;
}
for(i = 0; i < length-1; i++){
data[i] = i2c_master_readByte();
i2c_master_send_ack();
}
data[i] = i2c_master_readByte();
i2c_master_send_nack();
i2c_master_stop();
return true;
}
void LSM303_read_bytes(char device, char addr, char bytes[], char count)
{
i2c_master_start();
i2c_master_writeByte(device | WRITE);
i2c_master_readNAck();
i2c_master_writeByte(addr);
i2c_master_readNAck();
i2c_master_start();
i2c_master_writeByte(device | READ);
i2c_master_readNAck();
int i;
for (i = 0; i < count-1; ++i)
{
bytes[i] = i2c_master_readByte();
i2c_master_writeAck();
}
bytes[count-1] = i2c_master_readByte();
i2c_master_writeNack();
i2c_master_stop();
}
i2c_status ICACHE_FLASH_ATTR tc_read(i2c_config *config) {
tc_config_data *config_data = (tc_config_data *)config->data;
i2c_master_start();
/* Send address */
i2c_master_writeByte(config->address << 1 | 0);
if (i2c_master_getAck()) {
i2c_master_stop();
return I2C_ADDRESS_NACK;
}
/* Send command */
i2c_master_writeByte(0x21);
if (i2c_master_getAck()) {
i2c_master_stop();
return I2C_DATA_NACK;
}
i2c_master_stop();
i2c_master_start();
i2c_master_writeByte(config->address << 1 | 1);
if (i2c_master_getAck()) {
i2c_master_stop();
return I2C_ADDRESS_NACK;
}
uint8 i;
uint8 data[4];
for (i=0; i < 4; i++) {
data[i] = i2c_master_readByte();
i2c_master_setAck(i == 3);
}
i2c_master_stop();
if ((data[2] & 0x01) != 0) {
return I2C_COMMUNICATION_FAILED;
}
sint16 d = data[3] * 256 + (data[2] & 0xFC);
float tf = 0.0625 * d;
int ti = tf;
uint16 td = (tf - ti) * 100;
config_data->temperature = d / 4;
os_sprintf(config_data->temperature_str, "%d.%02d", ti, td);
return I2C_OK;
}
bool i2c_master_readBytes(uint8 address, uint8 *values, uint8 length)
{
if(values[0] > 0){
if(!i2c_master_writeBytes(address, values, 1)){
return false;
}
}
uint8 timeout = 100;
do{
i2c_master_start();
i2c_master_writeByte(address+1);
if(!i2c_master_checkAck()){
i2c_master_stop();
i2c_master_wait(1000);
continue;
}
break;
}while(--timeout>0);
if(timeout == 0){
return false;
}
#ifdef CONFIG_I2C_MASTER_DEBUG
console_printf("Read: ");
#endif
uint8 readed = 0;
while((readed < length) && (--timeout>0)){
uint8 byte = i2c_master_readByte();
values[readed++] = byte;
i2c_master_setAck((readed == length)); // send the ACK or NAK as applicable
i2c_master_setDC(1, 0); // release SDA
#ifdef CONFIG_I2C_MASTER_DEBUG
console_printf("%d ", byte);
#endif
}
#ifdef CONFIG_I2C_MASTER_DEBUG
console_printf("\n");
#endif
i2c_master_stop();
return true;
}
bool rv3029_read(uint8_t regaddr, uint8_t bytes, uint8_t *val) {
i2c_master_start();
// Write I²C Address for writing register
i2c_master_writeByte(RV3029_ADDR_W);
if (i2c_master_getAck()) {
os_printf("RV3029: no ACK for write addr\r\n");
i2c_master_stop();
return false;
}
// Write register address
i2c_master_writeByte(regaddr);
if(i2c_master_getAck()) {
os_printf("RV3029: no ACK for register\r\n");
i2c_master_stop();
return false;
}
i2c_master_stop();
i2c_master_start();
// Write I²C Address for reading
i2c_master_writeByte(RV3029_ADDR_R);
if (i2c_master_getAck()) {
os_printf("RV3029: no ACK for read addr\r\n");
i2c_master_stop();
return false;
}
uint8_t i;
for (i = 0; i < bytes; ++i) {
val[i] = i2c_master_readByte();
i2c_master_send_ack();
}
i2c_master_stop();
return true;
}
/******************************************************************************
* FunctionName : user_mvh3004_burst_read
* Description : burst read mvh3004's internal data
* Parameters : uint8 addr - mvh3004's address
* uint8 *pData - data point to put read data
* uint16 len - read length
* Returns : bool - true or false
*******************************************************************************/
LOCAL bool ICACHE_FLASH_ATTR
user_mvh3004_burst_read(uint8 addr, uint8 *pData, uint16 len)
{
uint8 ack;
uint16 i;
i2c_master_start();
i2c_master_writeByte(addr);
ack = i2c_master_getAck();
if (ack) {
os_printf("addr not ack when tx write cmd \n");
i2c_master_stop();
return false;
}
i2c_master_stop();
i2c_master_wait(40000);
i2c_master_start();
i2c_master_writeByte(addr + 1);
ack = i2c_master_getAck();
if (ack) {
os_printf("addr not ack when tx write cmd \n");
i2c_master_stop();
return false;
}
for (i = 0; i < len; i++) {
pData[i] = i2c_master_readByte();
i2c_master_setAck((i == (len - 1)) ? 1 : 0);
}
i2c_master_stop();
return true;
}
bool ICACHE_FLASH_ATTR read(uint8_t addr, uint8_t *buf, uint8_t length)
{
i2c_master_start();
i2c_master_writeByte(PCA9685_ADDR | I2C_WRITE);
if (i2c_master_getAck())
{
// os_printf("addr not ack when tx write cmd \n");
i2c_master_stop();
return false;
}
i2c_master_writeByte(addr);
if (i2c_master_getAck())
{
// os_printf("data not ack when tx write byte1 \n");
i2c_master_stop();
return false;
}
i2c_master_start();
i2c_master_writeByte(PCA9685_ADDR | I2C_READ);
if (i2c_master_getAck())
{
// os_printf("addr not ack when tx read cmd \n");
i2c_master_stop();
return false;
}
uint8_t i = 0;
for(i=0; i<length; i++)
{
buf[i] = i2c_master_readByte();
i2c_master_setAck(0);//(i == (length - 1)) ? 1 : 0);
}
i2c_master_stop();
return true;
}
int platform_i2c_recv_byte( unsigned id, int ack ){
uint8_t r = i2c_master_readByte();
i2c_master_setAck( !ack );
return r;
}
LOCAL i2c_status ICACHE_FLASH_ATTR robko_read(uint8 address, uint8 reg, uint8 *data, uint8 len) {
uint8 retry = 0;
i2c_status status;
do {
#if ROBKO_DEBUG
#if ROBKO_VERBOSE_OUTPUT
debug("ROBKO: 0x%02X 0x%02X reading %d bytes...\n", address, reg, len);
#endif
#endif
status = I2C_OK;
i2c_master_start();
/* Send address for write */
i2c_master_writeByte(address << 1 | 0);
if (i2c_master_getAck()) {
#if ROBKO_DEBUG
#if ROBKO_VERBOSE_OUTPUT
debug("ROBKO: Address ACK failed [0x%02X] [set READ command] \n", address);
#endif
#endif
status = I2C_ADDRESS_NACK;
goto done;
}
/* Send register */
i2c_master_writeByte(reg);
if (i2c_master_getAck()) {
#if ROBKO_DEBUG
#if ROBKO_VERBOSE_OUTPUT
debug("ROBKO: Register ACK failed [0x%02X] [set READ command] \n", reg);
#endif
#endif
status = I2C_DATA_NACK;
goto done;
}
i2c_master_stop();
i2c_master_start();
/* Send address for read */
i2c_master_writeByte(address << 1 | 1);
if (i2c_master_getAck()) {
#if ROBKO_DEBUG
#if ROBKO_VERBOSE_OUTPUT
debug("ROBKO: Address ACK failed [0x%02X] [execute READ command] \n", address);
#endif
#endif
status = I2C_ADDRESS_NACK;
goto done;
}
#if ROBKO_DEBUG
#if ROBKO_VERBOSE_OUTPUT
debug("READ: ");
#endif
#endif
/* Read data */
uint8 i = 0;
while (true) {
data[i] = i2c_master_readByte();
#if ROBKO_DEBUG
#if ROBKO_VERBOSE_OUTPUT
debug("0x%02X ", data[i]);
#endif
#endif
i++;
if (i < len) {
i2c_master_send_ack();
} else {
i2c_master_send_nack();
break;
}
}
done:
i2c_master_stop();
retry++;
} while (
retry < ROBKO_I2C_RETRY &&
status != I2C_OK
);
#if ROBKO_DEBUG
#if ROBKO_VERBOSE_OUTPUT
debug("\nROBKO: Done.\n\n");
#endif
#endif
return status;
}
