bool ide_powered(void) { int level = disable_irq_save(); int value = pcf50606_read(0x3c); restore_irq(level); return (value & 0x07) != 0; }
unsigned short adc_read(int channel) { static const int adcc2_parms[] = { [ADC_BUTTONS] = 0x81 | (5 << 1), /* 8b - ADCIN2 */ [ADC_REMOTE] = 0x81 | (6 << 1), /* 8b - ADCIN3 */ [ADC_BATTERY] = 0x01 | (0 << 1), /* 10b - BATVOLT, resistive divider */ }; int level; int data; level = disable_irq_save(); pcf50606_write(0x2f, adcc2_parms[channel]); data = pcf50606_read(0x30); if (channel == ADC_BATTERY) data = get_10bit_voltage(data); restore_irq(level); return (unsigned short)data; }
/* get remaining 2 bits and return 10 bit value */ static int get_10bit_voltage(int msbdata) { int data = msbdata << 2; data |= pcf50606_read(0x31) & 0x3; return data; }