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comparison main.c @ 52:c3f5e02c1c42

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try a few more power saving measures, untested
author Matt Johnston <matt@ucc.asn.au>
date Sun, 24 Jun 2012 14:18:35 +0800
parents 9ccd965d938a
children 0d3d14af55c2
comparison
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51:3deaa7ed8b8c 52:c3f5e02c1c42
118 // Set clock to 2mhz 118 // Set clock to 2mhz
119 cli(); 119 cli();
120 CLKPR = _BV(CLKPCE); 120 CLKPR = _BV(CLKPCE);
121 // divide by 4 121 // divide by 4
122 CLKPR = _BV(CLKPS1); 122 CLKPR = _BV(CLKPS1);
123 sei(); 123
124 // enable pullups
125 PORTB = 0xff; // XXX change when using SPI
126 PORTD = 0xff;
127 PORTC = 0xff;
124 128
125 // 3.3v power for bluetooth and SD 129 // 3.3v power for bluetooth and SD
126 DDR_LED |= _BV(PIN_LED); 130 DDR_LED |= _BV(PIN_LED);
127 DDR_SHDN |= _BV(PIN_SHDN); 131 DDR_SHDN |= _BV(PIN_SHDN);
128 132
129 // set pullup 133 // set pullup
130 PORTD |= _BV(PD2); 134 PORTD |= _BV(PD2);
131 // INT0 setup 135 // INT0 setup
136 EICRA = (1<<ISC01); // falling edge - data sheet says it won't work?
132 EIMSK = _BV(INT0); 137 EIMSK = _BV(INT0);
138
139 // comparator disable
140 ACSR = _BV(ACD);
141
142 // disable adc pin input buffers
143 DIDR0 = 0x3F; // acd0-adc5
144 DIDR1 = (1<<AIN1D)|(1<<AIN0D); // ain0/ain1
145
146 sei();
133 } 147 }
134 148
135 static void 149 static void
136 set_aux_power(uint8_t on) 150 set_aux_power(uint8_t on)
137 { 151 {