// This method translates 2 wires (a tx and rx line) to 1 wire, by letting the
// RX line control when data should be read or written from the single line
void usb1WirePassthrough(int8_t escIndex)
{
// Reset all GPIO
deinit_gpio(escIndex);
// Take control of the LEDs
ledInitDebug();
//delay(1000);
disable_hardware_uart();
init_all_gpio(escIndex);
// reset all the pins, 1wire goes into input mode, pullup on
reset_all_gpio(escIndex);
// set the programmer high
txSet(Bit_SET);
// Wait for programmer to go from 1 -> 0 indicating incoming data
while(rxHi());
while(1) {
// A new iteration on this loop starts when we have data from the programmer (read_programmer goes low)
// Setup escIndex pin to send data, pullup is the default
gpio_set_mode_escs(escIndex, Mode_Out_PP);
// Write the first bit
escSet(escIndex, Bit_RESET);
// Echo on the programmer tx line
txSet(Bit_RESET);
// Wait for programmer to go 0 -> 1
while(!rxHi());
// Programmer is high, end of bit
// Echo to the esc
escSet(escIndex, Bit_SET);
// Listen to the escIndex, input mode, pullup resistor is on
gpio_set_mode_escs(escIndex, Mode_IPU);
// Listen to the escIndex while there is no data from the programmer
while (rxHi()) {
if (escHi(escIndex)) {
txSet(Bit_SET);
}
else {
txSet(Bit_RESET);
}
}
}
}
// This method translates 2 wires (a tx and rx line) to 1 wire, by letting the
// RX line control when data should be read or written from the single line
void usb1WirePassthrough(uint8_t escIndex)
{
#ifdef STM32F3DISCOVERY
ledInitDebug();
#endif
//Disable all interrupts
__disable_irq();
// reset all the pins
GPIO_ResetBits(S1W_RX_GPIO, S1W_RX_PIN);
GPIO_ResetBits(S1W_TX_GPIO, S1W_TX_PIN);
// configure gpio
gpio_set_mode(S1W_RX_GPIO, S1W_RX_PIN, Mode_IPU);
gpio_set_mode(S1W_TX_GPIO, S1W_TX_PIN, Mode_Out_PP);
// hey user, turn on your ESC now
#ifdef STM32F10X
// reset our gpio register pointers and bitmask values
gpio_prep_vars(escIndex);
#endif
ESC_OUTPUT(escIndex);
ESC_SET_HI(escIndex);
TX_SET_HIGH;
// Wait for programmer to go from 1 -> 0 indicating incoming data
while(RX_HI);
while(1) {
// A new iteration on this loop starts when we have data from the programmer (read_programmer goes low)
// Setup escIndex pin to send data, pullup is the default
ESC_OUTPUT(escIndex);
// Write the first bit
ESC_SET_LO(escIndex);
// Echo on the programmer tx line
TX_SET_LO;
//set LEDs
RX_LED_OFF;
TX_LED_ON;
// Wait for programmer to go 0 -> 1
uint32_t ct=3333;
while(!RX_HI) {
if (ct > 0) ct--; // count down until 0;
// check for low time ->ct=3333 ~600uS //byte LO time for 0 @ 19200 baud -> 9*52 uS => 468.75uS
// App must send a 0 at 9600 baud (or lower) which has a LO time of at 104uS (or more) > 0 = 937.5uS LO
// BLHeliSuite will use 4800 baud
}
// Programmer is high, end of bit
// At first Echo to the esc, which helps to charge input capacities at ESC
ESC_SET_HI(escIndex);
// Listen to the escIndex, input mode, pullup resistor is on
gpio_set_mode(escHardware[escIndex].gpio, (1U << escHardware[escIndex].pinpos), Mode_IPU);
TX_LED_OFF;
if (ct==0) break; //we reached zero
// Listen to the escIndex while there is no data from the programmer
while (RX_HI) {
if (ESC_HI(escIndex)) {
TX_SET_HIGH;
RX_LED_OFF;
}
else {
TX_SET_LO;
RX_LED_ON;
}
}
}
// we get here in case ct reached zero
TX_SET_HIGH;
RX_LED_OFF;
// Enable all irq (for Hardware UART)
__enable_irq();
return;
}