5 static unsigned char pwm_vals[N_PWMLEDS*N_PWMLED_MODES];
6 static unsigned char adc_vals[N_PWMLEDS*N_PWMLED_MODES] = {
8 0x04, 0x14, 0x24, 0x38,
10 0x04, 0x14, 0x24, 0x38,
12 0x0c, 0x24, 0x48, 0x90,
15 // TODO: maybe convert this to bitmask to simplify pwmled_needs_adc() ?
16 static unsigned char pwmled_state[N_PWMLEDS];
22 static unsigned char pwmled_mode[N_PWMLEDS];
23 static unsigned char pwmled_mode_set[N_PWMLEDS];
25 static unsigned char pwm_probes[N_PWMLEDS];
27 static void start_probing(unsigned char n)
29 pwmled_state[n] = ST_PROBING;
38 for (i = 0; i < N_PWMLEDS*N_PWMLED_MODES; i++) {
41 pwmled_mode_set[i] = 0;
44 for (i = 0; i < N_PWMLEDS; i++) {
49 unsigned char pwmled_needs_adc(unsigned char n)
51 unsigned char st = pwmled_state[n];
52 if (st == ST_PROBING || st == ST_ON)
58 unsigned char pwmled_enabled(unsigned char n)
60 unsigned char st = pwmled_state[n];
61 if (st == ST_OFF || st == ST_ON)
67 void pwmled_set_mode(unsigned char n, unsigned char mode)
69 if (!pwmled_enabled(n))
80 pwmled_state[n] = ST_OFF;
84 if (mode <= N_PWMLED_MODES) {
87 pwmval = pwm_vals[n*N_PWMLED_MODES+mode];
92 pwmled_state[n] = ST_ON;
93 pwmled_mode[n] = mode;
94 pwmled_mode_set[n] = 1;
98 static void inline probing_adc(unsigned char n, uint16_t adcval)
100 unsigned char need_bigger = 0, i;
101 unsigned char *pwm_p = &pwm_vals[n*N_PWMLED_MODES];
102 unsigned char *adc_p = &adc_vals[n*N_PWMLED_MODES];
103 unsigned char pwm = pwm_probes[n];
111 if (adcval > 0x100 // Too high
112 || (pwm == 0 && adcval > 0) // non-zero voltage with zero PWM
115 pwmled_state[n] = ST_DISABLED;
122 for (i = 0; i < N_PWMLED_MODES; i++, pwm_p++, adc_p++) {
123 uint16_t adc = *adc_p;
131 if ((n == 1 && pwm > 0x35) || adcval != 0) {
139 if (!need_bigger) { // successfully probed
142 pwmled_state[n] = ST_OFF;
149 if (pwm >= 0xE0) { // over the maximum!
151 pwmled_state[n] = ST_DISABLED;
165 static void inline on_adc(unsigned char n, uint16_t adcval)
167 unsigned char mode = pwmled_mode[n];
168 uint16_t adc_exp = adc_vals[n*N_PWMLED_MODES+mode];
169 unsigned char *pwm_p = &pwm_vals[n*N_PWMLED_MODES+mode];
170 uint16_t old_pwm = *pwm_p;
171 uint16_t new_pwm = old_pwm;
179 if (pwmled_mode_set[n]) { // ignore the first reading
180 pwmled_mode_set[n] = 0;
184 // FIXME: running average?
185 if (2*adcval > 5*adc_exp) { // >2.5x expected, lower significantly
186 new_pwm = 2*old_pwm/3;
187 } else if (3*adcval > 4*adc_exp) { // >1.33x expected, lower a bit
188 new_pwm = old_pwm - 1;
189 } else if (4*adcval < 3*adc_exp) { // 0.75x expected, raise a bit
190 new_pwm = old_pwm + 1;
193 // FIXME: better disconnect detection
194 if (new_pwm > 0xE0) { // disconnected?
197 if (new_pwm < 2) { // short-circuit?
201 if (new_pwm != old_pwm) {
211 void pwmled_adc(unsigned char n, uint16_t adcval)
213 unsigned char i, probing;
214 switch (pwmled_state[n]) {
216 probing_adc(n, adcval);
220 for (i = 0; i < N_PWMLEDS; i++)
221 if (pwmled_state[i] == ST_PROBING)
225 for (i = 0; i < N_PWMLEDS; i++)
226 log_byte(pwmled_state[i]);
228 for (i = 0; i < N_PWMLEDS*N_PWMLED_MODES; i++)
229 log_byte(pwm_vals[i]);
239 // WTF am I doing in this function then? Maybe recently switched off?