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comparison src/adc_lightsensor.asm @ 37:0e1723f2761e

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use four additional data points for the battery monitor
author mh@mh-THINK.fritz.box
date Thu, 15 Aug 2013 12:39:05 +0200
parents 11d4fc797f74
children 18fe4e668baa
comparison
equal deleted inserted replaced
36:527c35f17a66 37:0e1723f2761e
100 get_battery_voltage3: 100 get_battery_voltage3:
101 movlw .100 101 movlw .100
102 cpfslt lo 102 cpfslt lo
103 movwf lo 103 movwf lo
104 ; lo will be between 100 (Full) and 0 (empty) 104 ; lo will be between 100 (Full) and 0 (empty)
105
106 ; use 3,6V battery sensing based on 50mA load
107 ; 75%
108 movff batt_voltage+0,sub_b+0
109 movff batt_voltage+1,sub_b+1
110 movlw LOW lithium_36v_75
111 movwf sub_a+0
112 movlw HIGH lithium_36v_75
113 movwf sub_a+1
114 call subU16 ; sub_c = sub_a - sub_b
115 btfsc neg_flag
116 bra get_battery_voltage3a
117 movlw .75
118 movwf lo
119 get_battery_voltage3a:
120 ; 50%
121 movlw LOW lithium_36v_50
122 movwf sub_a+0
123 movlw HIGH lithium_36v_50
124 movwf sub_a+1
125 call subU16 ; sub_c = sub_a - sub_b
126 btfsc neg_flag
127 bra get_battery_voltage3b
128 movlw .50
129 movwf lo
130 get_battery_voltage3b:
131 ; 25%
132 movlw LOW lithium_36v_25
133 movwf sub_a+0
134 movlw HIGH lithium_36v_25
135 movwf sub_a+1
136 call subU16 ; sub_c = sub_a - sub_b
137 btfsc neg_flag
138 bra get_battery_voltage3c
139 movlw .25
140 movwf lo
141 get_battery_voltage3c:
142 ; 10%
143 movlw LOW lithium_36v_10
144 movwf sub_a+0
145 movlw HIGH lithium_36v_10
146 movwf sub_a+1
147 call subU16 ; sub_c = sub_a - sub_b
148 btfsc neg_flag
149 bra get_battery_voltage3d
150 movlw .10
151 movwf lo
152 get_battery_voltage3d:
105 movf batt_percent,W 153 movf batt_percent,W
106 cpfsgt lo ; keep batt_percent on the lowest value found 154 cpfsgt lo ; keep batt_percent on the lowest value found
107 movff lo,batt_percent ; store value 155 movff lo,batt_percent ; store value
108 btfsc battery_is_36v ; but always use computed value for 3,6V battery 156 ; btfsc battery_is_36v ; but always use computed value for 3,6V battery
109 movff lo,batt_percent ; store value 157 ; movff lo,batt_percent ; store value
110 bcf adc_running ; =1: The ADC is in use 158 bcf adc_running ; =1: The ADC is in use
111 return 159 return
112 160
113 get_battery_voltage4: 161 get_battery_voltage4:
114 ; Use 1,5V battery voltage mode 162 ; Use 1,5V battery voltage mode