/* Assumes MSB first. */
void shift_out(uint8_t data) {
for(uint8_t i = 0; i < 8; i++) {
/* Write bit to data port. */
if (0 == (data & _BV(7 - i))) {
digital_write(SHIFT_OUT_DATA, LOW);
} else {
digital_write(SHIFT_OUT_DATA, HIGH);
}
/* Pulse clock to write next bit. */
digital_write(SHIFT_OUT_CLOCK, LOW);
digital_write(SHIFT_OUT_CLOCK, HIGH);
}
}
/* Assumes MSB first. */
uint8_t shift_in(void) {
uint8_t byte = 0;
uint8_t pin_value;
for(int i=0; i<8; i++) {
pin_value = digital_read(SHIFT_IN_DATA);
byte |= (pin_value << ((8 - 1) - i));
/* printf("%d = %d \n", ((8 - 1) - i), pin_value); */
/* Pulse clock to write next bit. */
digital_write(SHIFT_IN_CLOCK, LOW);
digital_write(SHIFT_IN_CLOCK, HIGH);
}
return byte;
}
int main(void) {
init();
uart_init();
stdout = &uart_output;
stdin = &uart_input;
uint8_t i;
uint8_t register_value;
uint8_t pin_value;
while (1) {
/* Read in parallel input by setting SH/LD low. */
digital_write(&PORT_SHLD, SHLD, 0);
//_delay_ms(5);
/* Freeze data by setting SH/LD high. When SH/LD is high data enters */
/* to reqisters from SER input and shifts one place to the right */
/* (Q0 -> Q1 -> Q2, etc.) with each positive-going clock transition. */
digital_write(&PORT_SHLD, SHLD, 1);
register_value = 0;
for(i=0; i<8; i++) {
pin_value = digital_read(PIN_QH, QH);
register_value |= (pin_value << ((8 - 1) - i));
printf("%d = %d \n", ((8 - 1) - i), pin_value);
/* Pulse clock input (CP) LOW-HIGH to read next bit. */
digital_write(&PORT_CLK, CLK, 0);
//_delay_ms(5);
digital_write(&PORT_CLK, CLK, 1);
}
printf("%d \n", register_value);
_delay_ms(2000);
}
return 0;
}
int main(void) {
init();
for(uint16_t i = 0; i < 0xffff; i++) {
/* Shift high byte first to shift register. */
shift_out(i >> 8);
shift_out(i & 0xff);
/* Pulse latch to transfer data from shift registers */
/* to storage registers. */
digital_write(LATCH, LOW);
digital_write(LATCH, HIGH);
_delay_ms(50);
}
return 0;
}
void io_init(void)
{
/* Extruder 0 Heater pin */
pin_mode(EXTRUDER_0_HEATER_PORT, EXTRUDER_0_HEATER_PIN, OUTPUT);
extruder_heater_off();
/* Heated Bed 0 Heater pin */
pin_mode(HEATED_BED_0_HEATER_PORT, HEATED_BED_0_HEATER_PIN, OUTPUT);
heated_bed_off();
/* setup I/O pins */
pin_mode(STEPPERS_RESET_PORT, STEPPERS_RESET_PIN, OUTPUT);
digital_write(STEPPERS_RESET_PORT, STEPPERS_RESET_PIN, 1); /* Disable reset for all stepper motors */
pin_mode(X_STEP_PORT, X_STEP_PIN, OUTPUT);
pin_mode(X_DIR_PORT, X_DIR_PIN, OUTPUT);
pin_mode(X_ENABLE_PORT, X_ENABLE_PIN, OUTPUT);
x_enable();
pin_mode(X_MIN_PORT, X_MIN_PIN, INPUT);
pin_mode(Y_STEP_PORT, Y_STEP_PIN, OUTPUT);
pin_mode(Y_DIR_PORT, Y_DIR_PIN, OUTPUT);
pin_mode(Y_ENABLE_PORT, Y_ENABLE_PIN, OUTPUT);
y_enable();
pin_mode(Y_MIN_PORT, Y_MIN_PIN, INPUT);
pin_mode(Z_STEP_PORT, Z_STEP_PIN, OUTPUT);
pin_mode(Z_DIR_PORT, Z_DIR_PIN, OUTPUT);
pin_mode(Z_ENABLE_PORT, Z_ENABLE_PIN, OUTPUT);
z_enable();
pin_mode(Z_MIN_PORT, Z_MIN_PIN, INPUT);
pin_mode(E_STEP_PORT, E_STEP_PIN, OUTPUT);
pin_mode(E_DIR_PORT, E_DIR_PIN, OUTPUT);
pin_mode(E_ENABLE_PORT, E_ENABLE_PIN, OUTPUT);
e_enable();
pin_mode(EXTRUDER_0_FAN_PORT, EXTRUDER_0_FAN_PIN, OUTPUT);
extruder_fan_off();
adc_init();
}
void shift_out_latch(void) {
digital_write(SHIFT_OUT_LATCH, LOW);
digital_write(SHIFT_OUT_LATCH, HIGH);
}
void shift_in_latch(void) {
digital_write(SHIFT_IN_LATCH, LOW);
digital_write(SHIFT_IN_LATCH, HIGH);
}
void digital_write(const unsigned char& mbed_pin, const bool& mode)
{
digital_write(get_port(mbed_pin), get_pin(mbed_pin), mode);
return;
}
