static inline void handle_interrupts(timer16_Sequence_t timer, volatile uint16_t *TCNTn, volatile uint16_t* OCRnA) {
if (Channel[timer] < 0)
*TCNTn = 0; // channel set to -1 indicated that refresh interval completed so reset the timer
else {
if (SERVO_INDEX(timer,Channel[timer]) < ServoCount && SERVO(timer,Channel[timer]).Pin.isActive)
digitalWrite( SERVO(timer,Channel[timer]).Pin.nbr,LOW); // pulse this channel low if activated
}
Channel[timer]++; // increment to the next channel
if (SERVO_INDEX(timer,Channel[timer]) < ServoCount && Channel[timer] < SERVOS_PER_TIMER) {
*OCRnA = *TCNTn + SERVO(timer,Channel[timer]).ticks;
if (SERVO(timer,Channel[timer]).Pin.isActive) // check if activated
digitalWrite( SERVO(timer,Channel[timer]).Pin.nbr,HIGH); // its an active channel so pulse it high
}
else {
// finished all channels so wait for the refresh period to expire before starting over
if ( ((unsigned)*TCNTn) + 4 < usToTicks(REFRESH_INTERVAL) ) // allow a few ticks to ensure the next OCR1A not missed
*OCRnA = (unsigned int)usToTicks(REFRESH_INTERVAL);
else
*OCRnA = *TCNTn + 4; // at least REFRESH_INTERVAL has elapsed
Channel[timer] = -1; // this will get incremented at the end of the refresh period to start again at the first channel
}
}
uint8_t Servo::attach(int pin, int minimum, int maximum)
{
if (servoIndex < MAX_SERVOS) {
pinMode(pin, OUTPUT);
servo_pin[servoIndex] = pin;
servo_ticks[servoIndex] = usToTicks(DEFAULT_PULSE_WIDTH);
servo_active_mask |= (1<<servoIndex);
min_ticks = usToTicks(minimum);
max_ticks = usToTicks(maximum);
if (!(SIM_SCGC6 & SIM_SCGC6_PDB)) {
SIM_SCGC6 |= SIM_SCGC6_PDB; // TODO: use bitband for atomic bitset
PDB0_MOD = 0xFFFF;
PDB0_CNT = 0;
PDB0_IDLY = 0;
PDB0_SC = PDB_CONFIG;
// TODO: maybe this should be a higher priority than most
// other interrupts (init all to some default?)
PDB0_SC = PDB_CONFIG | PDB_SC_SWTRIG;
}
NVIC_ENABLE_IRQ(IRQ_PDB);
}
return servoIndex;
}
void Servo_Handler(timer16_Sequence_t timer, Tc *tc, uint8_t channel) {
// clear interrupt
tc->TC_CHANNEL[channel].TC_SR;
if (Channel[timer] < 0)
tc->TC_CHANNEL[channel].TC_CCR |= TC_CCR_SWTRG; // channel set to -1 indicated that refresh interval completed so reset the timer
else if (SERVO_INDEX(timer, Channel[timer]) < ServoCount && SERVO(timer, Channel[timer]).Pin.isActive)
extDigitalWrite(SERVO(timer, Channel[timer]).Pin.nbr, LOW); // pulse this channel low if activated
Channel[timer]++; // increment to the next channel
if (SERVO_INDEX(timer, Channel[timer]) < ServoCount && Channel[timer] < SERVOS_PER_TIMER) {
tc->TC_CHANNEL[channel].TC_RA = tc->TC_CHANNEL[channel].TC_CV + SERVO(timer,Channel[timer]).ticks;
if (SERVO(timer,Channel[timer]).Pin.isActive) // check if activated
extDigitalWrite(SERVO(timer, Channel[timer]).Pin.nbr, HIGH); // its an active channel so pulse it high
}
else {
// finished all channels so wait for the refresh period to expire before starting over
tc->TC_CHANNEL[channel].TC_RA =
tc->TC_CHANNEL[channel].TC_CV < usToTicks(REFRESH_INTERVAL) - 4
? (unsigned int)usToTicks(REFRESH_INTERVAL) // allow a few ticks to ensure the next OCR1A not missed
: tc->TC_CHANNEL[channel].TC_CV + 4; // at least REFRESH_INTERVAL has elapsed
Channel[timer] = -1; // this will get incremented at the end of the refresh period to start again at the first channel
}
}
static mp_obj_t servo_obj_angle(int n_args, const mp_obj_t *args) {
pyb_servo_obj_t *self = args[0];
if (n_args == 1) {
// get
float angle = map_uint_to_float(servo_ticks[self->servo_id],
usToTicks(self->min_usecs),
usToTicks(self->max_usecs),
0.0, 180.0);
return mp_obj_new_float(angle);
}
// Set
float angle = mp_obj_get_float(args[1]);
if (angle < 0.0F) {
angle = 0.0F;
}
if (angle > 180.0F) {
angle = 180.0F;
}
servo_ticks[self->servo_id] = map_float_to_uint(angle,
0.0F, 180.0F,
usToTicks(self->min_usecs),
usToTicks(self->max_usecs));
return mp_const_none;
}
Servo::Servo()
{
if (ServoCount < MAX_SERVOS)
{
/// TODO: Really, we need to search through servos[] for the first one
/// that is not being used, rather than always use ServoCount as the
/// index. What happens if you create 24 servos, then destroy one
/// and create another. Right now that would fail, even though you
/// weren't actively using 24 servos.
this->servoIndex = ServoCount++; // assign a servo index to this instance
servos[this->servoIndex].ticks = usToTicks(DEFAULT_PULSE_WIDTH); // store default to neutral position
}
else
this->servoIndex = INVALID_SERVO ; // too many servos
}
void Servo::writeMicroseconds(int value)
{
// calculate and store the values for the given channel
byte channel = this->servoIndex;
if( (channel < MAX_SERVOS) ) // ensure channel is valid
{
if( value < SERVO_MIN() ) // ensure pulse width is valid
value = SERVO_MIN();
else if( value > SERVO_MAX() )
value = SERVO_MAX();
value = value - TRIM_DURATION;
value = usToTicks(value); // convert to ticks after compensating for interrupt overhead - 12 Aug 2009
servos[channel].ticks = value; // this is atomic on a 16bit uC, no need to disable Interrupts
}
}
static mp_obj_t servo_obj_usecs(int n_args, const mp_obj_t *args) {
pyb_servo_obj_t *self = args[0];
uint usecs;
if (n_args == 1) {
// get
return MP_OBJ_NEW_SMALL_INT(ticksToUs(servo_ticks[self->servo_id]));
}
// Set
usecs = mp_obj_get_int(args[1]);
if (self->min_usecs < self->max_usecs) {
usecs = clamp(usecs, self->min_usecs, self->max_usecs);
} else {
usecs = clamp(usecs, self->max_usecs, self->min_usecs);
}
servo_ticks[self->servo_id] = usToTicks(usecs);
return mp_const_none;
}
void Servo::writeMicroseconds(int value) {
// calculate and store the values for the given channel
byte channel = this->servoIndex;
if (channel < MAX_SERVOS) { // ensure channel is valid
if (value < SERVO_MIN()) // ensure pulse width is valid
value = SERVO_MIN();
else if (value > SERVO_MAX())
value = SERVO_MAX();
value = value - TRIM_DURATION;
value = usToTicks(value); // convert to ticks after compensating for interrupt overhead - 12 Aug 2009
uint8_t oldSREG = SREG;
cli();
servos[channel].ticks = value;
SREG = oldSREG;
}
}
void Servo_writeMicroseconds(byte servoIndex, int value)
{
if( (servoIndex < MAX_SERVOS) ) // ensure channel is valid
{
if( value < SERVO_MIN() ) // ensure pulse width is valid
value = SERVO_MIN();
else if( value > SERVO_MAX() )
value = SERVO_MAX();
value = value - SERVO_TRIM_DURATION;
value = usToTicks(value); // convert to ticks after compensating for interrupt overhead - 12 Aug 2009
uint8_t oldSREG = SREG;
cli();
servos[servoIndex].ticks = value;
SREG = oldSREG;
}
}
void Servo::writeMicroseconds(int value)
{
// calculate and store the values for the given channel
byte channel = this->servoIndex;
if( (channel < MAX_SERVOS) ) // ensure channel is valid
{
if( value < SERVO_MIN() ) // ensure pulse width is valid
value = SERVO_MIN();
else if( value > SERVO_MAX() )
value = SERVO_MAX();
value = value - TRIM_DURATION;
value = usToTicks(value); // convert to ticks after compensating for interrupt overhead - 12 Aug 2009
CCTL0 = 0; // disable interrupt to avoid race condition
servos[channel].ticks = value;
CCTL0 = CCIE;
}
}
//************************************************************************
void Servo::writeMicroseconds(int value)
{
// calculate and store the values for the given channel
byte channel = this->servoIndex;
if ( (channel >= 0) && (channel < MAX_SERVOS) ) // ensure channel is valid
{
if ( value < SERVO_MIN() ) // ensure pulse width is valid
value = SERVO_MIN();
else if ( value > SERVO_MAX() )
value = SERVO_MAX();
value = value - TRIM_DURATION;
value = usToTicks(value); // convert to ticks after compensating for interrupt overhead
unsigned int status;
status = disableInterrupts();
servos[channel].ticks = value;
restoreInterrupts(status);
}
}
/*
write(value, speed) - Just like write but at reduced speed.
value - Target position for the servo. Identical use as value of the function write.
speed - Speed at which to move the servo.
speed=0 - Full speed, identical to write
speed=1 - Minimum speed
speed=255 - Maximum speed
*/
void Servo::write(float value, uint8_t speed) {
// This fuction is a copy of write and writeMicroseconds but value will be saved
// in target instead of in ticks in the servo structure and speed will be save
// there too.
//double degrees = value;
if (speed) {
if (value < MIN_PULSE_WIDTH) {
// treat values less than 544 as angles in degrees (valid values in microseconds are handled as microseconds)
// updated to use constrain instead of if, pva
value = value * 10;//make the value tem times bigger, must after the if() detection or if() will fail
value = constrain(value, 0, 1800);
value = map(value, 0, 1800, SERVO_MIN(), SERVO_MAX());
}
// calculate and store the values for the given channel
byte channel = this->servoIndex;
if( (channel >= 0) && (channel < MAX_SERVOS) ) { // ensure channel is valid
// updated to use constrain instead of if, pva
//value = constrain(value, SERVO_MIN(), SERVO_MAX());
//Serial.println(value,DEC);
//value = value - TRIM_DURATION;
value = usToTicks(value); // convert to ticks after compensating for interrupt overhead - 12 Aug 2009
// Set speed and direction
uint8_t oldSREG = SREG;
cli();
servos[channel].target = value;
servos[channel].speed = speed;
SREG = oldSREG;
}
}
else {
write (value);
}
}
static void initISR(timer16_Sequence_t timer)
{
if( timer == _timer1){
if( SRV_TAUxEN == 0 ){
#ifdef WORKAROUND_READ_MODIFY_WRITE
SBI2( SRV_SFR2_PERx, SRV_SFR2_BIT_TAUxEN ); /* supplies input clock */
#else
SRV_TAUxEN = 1U; /* supplies input clock */
#endif
SRV_TPSx = TIMER_CLOCK;
}
#ifdef WORKAROUND_READ_MODIFY_WRITE
/* Set INTTM04 low priority */
SBI( SRV_SFR_PR1xx, SRV_SFR_BIT_TMPR1xx );
SBI( SRV_SFR_PR0xx, SRV_SFR_BIT_TMPR0xx );
/* Mask channel 04 interrupt */
CBI( SRV_SFR_MKxx, SRV_SFR_BIT_TMMKxx ); /* enable INTTM04 interrupt */
CBI( SRV_SFR_IFxx, SRV_SFR_BIT_TMIFxx ); /* clear INTTM04 interrupt flag */
#else
/* Set INTTM04 low priority */
SRV_TMPR1xx = 1U;
SRV_TMPR0xx = 1U;
/* Mask channel 04 interrupt */
SRV_TMMKxx = 0U; /* enable INTTM04 interrupt */
SRV_TMIFxx = 0U; /* clear INTTM04 interrupt flag */
#endif
/* Channel 0 used as interval timer */
SRV_TMRxx = 0x8000U;
SRV_TDRxx = (unsigned int)usToTicks(REFRESH_INTERVAL);
SRV_TSx |= SRV_CHx; /* operation is enabled (start trigger is generated) */
delay(1);
Channel[timer] = -1;
handle_interrupts(_timer1); /* TDR0x setting */
}
}
void Servo::writeMicroseconds(int value)
{
// calculate and store the values for the given channel
byte channel = this->servoIndex;
if( (channel < MAX_SERVOS) ) // ensure channel is valid
{
if( value < SERVO_MIN() ) // ensure pulse width is valid
value = SERVO_MIN();
else if( value > SERVO_MAX() )
value = SERVO_MAX();
value = value - TRIM_DURATION;
value = usToTicks(value); // convert to ticks after compensating for interrupt overhead - 12 Aug 2009
#if defined(REL_GR_KURUMI)
servos[channel].ticks = value;
#else
noInterrupts();
servos[channel].ticks = value;
interrupts();
#endif
}
}
void init_servo(void)
{
// for servo
SIM_SCGC6 |= SIM_SCGC6_PDB; // TODO: use bitband for atomic read-mod-write
pinMode(12, OUTPUT);
PDB0_MOD = 0xFFFF;
PDB0_CNT = 0;
PDB0_IDLY = 0;
PDB0_SC = PDB_CONFIG;
NVIC_ENABLE_IRQ(IRQ_PDB);
// TODO: maybe this should be a higher priority than most
// other interrupts (init all to some default?)
PDB0_SC = PDB_CONFIG | PDB_SC_SWTRIG;
//servo_active_mask = 9;
servo_active_mask = 8;
//servo_pin[0] = 12;
//servo_ticks[0] = usToTicks(600);
servo_pin[3] = 11;
servo_ticks[3] = usToTicks(2100);
//pinMode(12, OUTPUT);
pinMode(11, OUTPUT);
}
mp_obj_t pyb_Servo(void) {
uint16_t mask;
pyb_servo_obj_t *self = m_new_obj(pyb_servo_obj_t);
self->base.type = &servo_obj_type;
self->min_usecs = MIN_PULSE_WIDTH;
self->max_usecs = MAX_PULSE_WIDTH;
/* Find an unallocated servo id */
self->servo_id = 0;
for (mask=1; mask < (1<<MAX_SERVOS); mask <<= 1) {
if (!(servo_allocated_mask & mask)) {
servo_allocated_mask |= mask;
servo_active_mask &= ~mask;
servo_ticks[self->servo_id] = usToTicks(DEFAULT_PULSE_WIDTH);
return self;
}
self->servo_id++;
}
m_del_obj(pyb_servo_obj_t, self);
mp_raise_ValueError("No available servo ids");
return mp_const_none;
}
// Value is a float, in us. and represents the on-time for this servo pin
// Pin is the pin number being changed
int32_t SoftPWMServoServoWrite(uint32_t Pin, float Value)
{
SoftPWMServoRawWrite(Pin, usToTicks(Value), SOFTPWMSERVO_SERVO);
return SOFTPWMSERVO_OK;
}
void hwTimerCallback( void )
{
int i, j;
int logicState = 1;
int logicStateLen = 0;
bool repeatCode = false;
/* stop the HW TIMER */
RTC_REG_WRITE(FRC1_CTRL_ADDRESS, DIVDED_BY_16 | TM_EDGE_INT);
//Set GPIO0 to LOW
gpio_output_set(0, BIT0, BIT0, 0);
/* load the HW TIMER for next IR message frame */
uint32 ticks = usToTicks(70000);
RTC_REG_WRITE(FRC1_LOAD_ADDRESS, ticks);
/* derive the raw IR message frame */
for( i = 0 ; i < ( edgeIndex - 1 ) ; i++)
{
/* find number of bits in current interval */
logicStateLen = ( intervalArr[i] / minInterval );
for( j = 0 ; j < logicStateLen ; j++)
{
rawIrMsg[ rawIrMsgLen ] = logicState;
rawIrMsgLen++;
}
/* toggle state */
logicState ^= 1;
#if 0
os_printf( "\r\nDuration of interval %d: %d us\r\n", i, intervalArr[i] );
#endif
}
#if 1
/* print the received raw IR message frame */
os_printf( "\r\nRAW IR CODE: ");
for ( i = 0 ; i < rawIrMsgLen ; i++ )
{
os_printf( "%d", rawIrMsg[i] );
}
#endif
/**********************************************
* DECODE NEC MESSAGE FRAME!
* - every message frame contains 32 coded bits
**********************************************/
/* set index to the beginning of the coded bits */
/* the message frame starts with a burst of 16 logic 1's, skip them all */
i = 0 ;
while ( rawIrMsg[i] == 1 ) i++;
/* the message frame continues with a burst of 8 logic 0's, skip them all */
j = 0;
while (rawIrMsg[i] == 0)
{
i++;
j++;
}
/* if the number of zeros is 4, then ignore the current message frame since
* it corresponds to a "REPEATED CODE".
*/
if ( j <= 4 )
{
#if 1
os_printf( "\r\nREPEATED CODE");
#endif
repeatCode = true;
}
/* decode raw message only if it is not a repeat code */
if (repeatCode == false)
{
/* at this point 'i' contains the index of the beginning of the encoded bits */
/* decode raw message
* - [1][0][0][0] represents a '1'
* - [1][0] represents a '0'
*/
irCmd = 0;
for (j = 0; j < 32; j++)
{
if (rawIrMsg[i + 2] == 0)
{
/* it is a '1', so left shift a '1' */
irCmd = (irCmd << 1) | 1;
/* move to the beginning of the next encoded bit
* (increment i until next 1 in raw message frame)
*/
do {i++;} while ( rawIrMsg[i] == 0 );
}
else {
/* it is a '0', so left shift a '0' */
irCmd = irCmd << 1;
/* move to the beginning of the next encoded bit */
i += 2;
}
}
#if 1
/* print the received IR cmd */
os_printf("\r\nIR CMD: %x", irCmd);
#endif
}
/**********************************************
* END - DECODE NEC MESSAGE FRAME!
* - every message frame contains 32 coded bits
**********************************************/
/* reset index */
edgeIndex = 0;
#if 1
os_printf("\r\nEnd of IR message frame\r\n");
#endif
return;
}
// initialize the custom stuff that goes beyond esp-link
void user_init()
{
// Initialize the GPIO subsystem.
gpio_init();
/* ====================================== */
/* UART */
/* ====================================== */
// Initialize UART0 and UART1
/* NOTE: UART1 and I2S share same GPIO. Cannot use simultaneously. */
uart_init( BIT_RATE_115200, BIT_RATE_115200 );
// uart0_sendStr( "\nUART0 - USED TO PROGRAM THE MODULE\n" );
os_printf("\n===================\nUART1 - DEBUG OUPUT\n===================\n");
/* NOTE: PWM CANNOT BE USED SIMULTANEOUSLY WITH HW TIMER */
#if 0
/* ====================================== */
/* PWM */
/* ====================================== */
uint32 pwm_period = 1000;
uint32 pwm_duty[PWM_CHANNEL] = {0};
uint32 io_info[][3] = { {PWM_0_OUT_IO_MUX,PWM_0_OUT_IO_FUNC,PWM_0_OUT_IO_NUM},
{PWM_1_OUT_IO_MUX,PWM_1_OUT_IO_FUNC,PWM_1_OUT_IO_NUM},
};
/* PIN FUNCTION INIT FOR PWM OUTPUT */
pwm_init(pwm_period, pwm_duty, PWM_CHANNEL, io_info);
/* set pwm_duty cycle */
pwm_set_duty (14185, 0);
pwm_set_duty (22222, 1); // todo: explain why 22222 is the highest possible value
/* start PWM */
pwm_start(); // NOTE: PWM causes spikes in other GPIOs
#endif
/* ====================================== */
/* GPIO INTERRPUT */
/* ====================================== */
/* Set GPIO12 in GPIO mode */
PIN_FUNC_SELECT( PERIPHS_IO_MUX_MTDI_U, FUNC_GPIO12 );
/* Set GPIO12 as input */
GPIO_DIS_OUTPUT( GPIO_ID_PIN(12) );
/* Disable all GPIO interrupts */
ETS_GPIO_INTR_DISABLE();
/* Set a GPIO callback function */
ETS_GPIO_INTR_ATTACH( gpioCallback, NULL );
/* Configure the type of edge */
gpio_pin_intr_state_set( GPIO_ID_PIN(12), GPIO_PIN_INTR_ANYEDGE );
ETS_GPIO_INTR_ENABLE();
/* ====================================== */
/* SOFTWARE TIMER */
/* ====================================== */
// Set GPIO0 to output mode
PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO0_U, FUNC_GPIO0);
//Set GPIO0 low
gpio_output_set(0, RELAY_PIN, RELAY_PIN, 0);
/* disarm timer */
os_timer_disarm((ETSTimer*)&some_timer);
/* set callback */
os_timer_setfn((ETSTimer*)&some_timer, (os_timer_func_t *) softwareTimerCallback, NULL);
/* arm the timer -> os_timer_arm(<pointer>, <period in ms>, <fire periodically>) */
os_timer_arm((ETSTimer*)&some_timer, 10, 1);
/* ====================================== */
/* OS TASK */
/* ====================================== */
/* setup OS task */
// system_os_task(user_procTask, user_procTaskPrio, user_procTaskQueue, user_procTaskQueueLen);
/* send a message to OS task (fire task) */
// system_os_post(user_procTaskPrio, 0, 0 );
/* ====================================== */
/* HARDWARE TIMER */
/* ====================================== */
/* The hardware timer is used to indicate when a complete IR message frame should have
* arrived in order to process the received data and calculate the IR command.
*
* It is configured in "one-shot" mode. It is started when the beginning of an
* IR message frame is detected and stopped after the complete message frame has been read.
* This means that the duration of the HW timer should be longer than the duration of
* the longest message frame. In the NEC IR tranmission protocol all message frames have
* a duration of approximately 67.5ms.
*/
/* load the HW TIMER */
uint32 ticks = usToTicks(70000); // 70ms
RTC_REG_WRITE(FRC1_LOAD_ADDRESS, ticks);
/* register callback function */
ETS_FRC_TIMER1_INTR_ATTACH( hwTimerCallback, NULL );
/* enable interrupts */
TM1_EDGE_INT_ENABLE();
ETS_FRC1_INTR_ENABLE();
/* don't start timer yet */
/* the timer is started inside the GPIO INT callback */
/* ====================================== */
/* UDP SERVER */
/* ====================================== */
/* usage: echo <data> | nc -wl -u <ip address> <port>
* example: echo "foo" | nc -w1 -u 192.168.1.187 7777 */
/* allocate space for server */
pUdpServer = (struct espconn *) os_zalloc(sizeof(struct espconn));
/* clear allocated memory */
ets_memset(pUdpServer, 0, sizeof(struct espconn));
/* create the server */
espconn_create(pUdpServer);
/* set the type of server */
pUdpServer->type = ESPCONN_UDP;
/* allocate memory for UDP settings */
pUdpServer->proto.udp = (esp_udp *) os_zalloc(sizeof(esp_udp));
/* set the port that the server will be listening to */
pUdpServer->proto.udp->local_port = 7777;
/* register the callback */
espconn_regist_recvcb(pUdpServer, udpServerRxCb);
/* start listening */
if (espconn_create(pUdpServer))
{
while (1) { os_printf("Error creating a UDP server\n"); }
}
/* ====================================== */
/* WIFI */
/* ====================================== */
wifi_set_opmode(STATION_MODE);
wifi_station_get_config_default(&stconf);
// os_strncpy((char*) stconf.ssid, "TP-LINK_2.4GHz_FC2E51", 32);
// os_strncpy((char*) stconf.password, "tonytony", 64);
os_strncpy((char*) stconf.ssid, "WLAN-PUB", 32);
os_strncpy((char*) stconf.password, "", 64);
// os_strncpy((char*) stconf.ssid, "MAD air", 32);
// os_strncpy((char*) stconf.password, "glioninlog", 64);
stconf.bssid_set = 0;
wifi_station_set_config(&stconf);
// /* ====================================== */
// /* WS2812 LED STRIP */
// /* ====================================== */
//
// /* NOTE: UART1 and I2S share same GPIO. Cannot use simultaneously. */
// ws2812_init();
//
// /* G R B */
// uint8_t ledout[] = {
// 0xff, 0x00, 0x00, //4th
//// 0xff, 0x00, 0x00, //3rd
//// 0x00, 0xff, 0x00, //2nd
//// 0x00, 0x00, 0xff, //1st
// };
//
//#if 0
// os_printf("\r\nB R G: %x %x %x\r\n", ledout[0], ledout[1],ledout[2]);
//#endif
//
// ws2812_push( ledout, sizeof( ledout ) );
/* ====================================== */
/* TCP CONNECTION */
/* ====================================== */
/* allocate space for server */
pTcpConn = (struct espconn *) os_zalloc(sizeof(struct espconn));
/* clear allocated memory */
ets_memset(pTcpConn, 0, sizeof(struct espconn));
/* set the type of connection */
pTcpConn->type = ESPCONN_TCP;
/* set state to NONE */
pTcpConn->state = ESPCONN_NONE;
/* allocate memory for TCP settings */
pTcpConn->proto.tcp = (esp_tcp *) os_zalloc(sizeof(esp_tcp));
/* set the port that the connection will be listening to */
pTcpConn->proto.tcp->local_port = espconn_port();
/* set the remote port and IP address */
pTcpConn->proto.tcp->remote_port = 80;
os_memcpy(pTcpConn->proto.tcp->remote_ip, server_ip_address, sizeof(server_ip_address));
/* register callbacks */
espconn_regist_connectcb(pTcpConn, tcpConnCb);
espconn_regist_reconcb(pTcpConn, tcpReconnCb);
/* disarm timer */
os_timer_disarm((ETSTimer*)&wifi_setup_timer);
/* set callback */
os_timer_setfn((ETSTimer*)&wifi_setup_timer, (os_timer_func_t *) wifiConnectTimerCb, NULL);
/* arm the timer -> os_timer_arm(<pointer>, <period in ms>, <fire periodically>) */
os_timer_arm((ETSTimer*)&wifi_setup_timer, 5000, 1);
return;
}