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Servo & PWM support for LPC1768 ()

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This commit is contained in:
Bob-the-Kuhn 2017-08-14 14:40:13 -05:00 • committed by Scott Lahteine
parent 859fa35287
commit 97444391e0
10 changed files with 739 additions and 86 deletions
Marlin/src/HAL/HAL_LPC1768
arduino.cpp

39
Marlin/src/HAL/HAL_LPC1768/arduino.cpp
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@ -140,27 +140,34 @@ bool digitalRead(int pin) {
return LPC_GPIO(pin_map[pin].port)->FIOPIN & LPC_PIN(pin_map[pin].pin) ? 1 : 0;
}
void analogWrite(int pin, int pwm_value) {
/*
void analogWrite(int pin, int pwm_value) { // 1 - 254: pwm_value, 0: LOW, 255: HIGH
extern bool LPC1768_PWM_attach_pin(uint8_t, uint32_t, uint32_t, uint8_t);
extern bool LPC1768_PWM_write(uint8_t, uint32_t);
extern bool LPC1768_PWM_detach_pin(uint8_t);
#define MR0_MARGIN 200 // if channel value too close to MR0 the system locks up
static bool out_of_PWM_slots = false;
if (!WITHIN(pin, 0, NUM_DIGITAL_PINS - 1) || pin_map[pin].port == 0xFF)
return;
int old_pin = pin;
int old_value = pwm_value;
if(old_value != 0) {
for(uint16_t x = 0; x <= 5000; x++) {
LPC_GPIO(pin_map[pin].port)->FIOSET = LPC_PIN(pin_map[pin].pin);
//digitalWrite(old_pin, HIGH);
delayMicroseconds(old_value);
LPC_GPIO(pin_map[pin].port)->FIOCLR = LPC_PIN(pin_map[pin].pin);
//pinMode(pin, OUTPUT);
//digitalWrite(old_pin, LOW);
delayMicroseconds(255 - old_value);
uint value = MAX(MIN(pwm_value, 255), 0);
if (value == 0 || value == 255) { // treat as digital pin
LPC1768_PWM_detach_pin(pin); // turn off PWM
digitalWrite(pin, value);
}
else {
if (LPC1768_PWM_attach_pin(pin, 1, (LPC_PWM1->MR0 - MR0_MARGIN), 0xff)) // locks up if get too close to MR0 value
LPC1768_PWM_write(pin, map(value, 1, 254, 1, (LPC_PWM1->MR0 - MR0_MARGIN))); // map 1-254 onto PWM range
else { // out of PWM channels
if (!out_of_PWM_slots) usb_serial.printf(".\nWARNING - OUT OF PWM CHANNELS\n.\n"); //only warn once
out_of_PWM_slots = true;
digitalWrite(pin, value); // treat as a digital pin if out of channels
}
}
*/
}
extern bool HAL_adc_finished();