arduino/esp8266
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add PWM Range control

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setting freq to 50, range to 20000 and writing between 700 and 2200
gives servo control for example
This commit is contained in:
John Doe 2015-06-02 01:11:08 +03:00
parent b68dfbc7ce
commit 6ae438b035
2 changed files with 11 additions and 3 deletions
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1
cores/esp8266/Arduino.h
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@ -188,6 +188,7 @@ int analogRead(uint8_t);
void analogReference(uint8_t mode);
void analogWrite(uint8_t, int);
void analogWriteFreq(uint32_t freq);
void analogWriteRange(uint32_t range);
unsigned long millis(void);
unsigned long micros(void);

13
cores/esp8266/core_esp8266_wiring_pwm.c
View File

@ -27,6 +27,7 @@
uint32_t pwm_mask = 0;
uint16_t pwm_values[17] = {0,};
uint32_t pwm_freq = 1000;
uint32_t pwm_range = PWMRANGE;
uint32_t pwm_multiplier = 0;
uint16_t pwm_steps[17];
@ -71,7 +72,7 @@ void prep_pwm_steps(){
for(i=0; i<17; i++){
if((pwm_mask & (1 << i)) != 0 && pwm_values[i] != 0) pwm_temp_steps[pwm_temp_steps_len++] = pwm_values[i];
}
pwm_temp_steps[pwm_temp_steps_len++] = PWMRANGE;
pwm_temp_steps[pwm_temp_steps_len++] = pwm_range;
pwm_temp_steps_len = pwm_sort_array(pwm_temp_steps, pwm_temp_steps_len) - 1;
for(i=0; i<pwm_temp_steps_len; i++){
pwm_temp_masks[i] = pwm_get_mask(pwm_temp_steps[i]);
@ -83,7 +84,7 @@ void prep_pwm_steps(){
pwm_steps_len = pwm_temp_steps_len;
ets_memcpy(pwm_steps, pwm_temp_steps, (pwm_temp_steps_len + 1) * 2);
ets_memcpy(pwm_steps_mask, pwm_temp_masks, pwm_temp_steps_len * 4);
pwm_multiplier = ESP8266_CLOCK/(PWMRANGE * pwm_freq);
pwm_multiplier = ESP8266_CLOCK/(pwm_range * pwm_freq);
ETS_FRC1_INTR_ENABLE();
}
@ -133,7 +134,7 @@ extern void __analogWrite(uint8_t pin, int value) {
pinMode(pin, OUTPUT);
digitalWrite(pin, LOW);
}
pwm_values[pin] = value % (PWMRANGE + 1);
pwm_values[pin] = value % (pwm_range + 1);
prep_pwm_steps();
if(start_timer){
pwm_start_timer();
@ -145,5 +146,11 @@ extern void __analogWriteFreq(uint32_t freq){
prep_pwm_steps();
}
extern void __analogWriteRange(uint32_t range){
pwm_range = range;
prep_pwm_steps();
}
extern void analogWrite(uint8_t pin, int val) __attribute__ ((weak, alias("__analogWrite")));
extern void analogWriteFreq(uint32_t freq) __attribute__ ((weak, alias("__analogWriteFreq")));
extern void analogWriteRange(uint32_t range) __attribute__ ((weak, alias("__analogWriteRange")));