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Brian Park
0adc7e78aa
I also verified my interpretation of the DS3231 datasheet and my implementation of this formula by placing a DS3231 chip in the freezer section of my refrigerator for an hour or two, then reading the temperature. I got -16C, which is close enough to the -18C that the freezer was set to.
77 lines
1.2 KiB
Go
77 lines
1.2 KiB
Go
package ds3231
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import (
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"testing"
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)
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func TestPositiveMilliCelsius(t *testing.T) {
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t1000 := milliCelsius(0, 0)
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if t1000 != 0 {
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t.Fatal(t1000)
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}
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t1000 = milliCelsius(0, 0b01000000)
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if t1000 != 250 {
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t.Fatal(t1000)
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}
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t1000 = milliCelsius(0, 0b10000000)
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if t1000 != 500 {
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t.Fatal(t1000)
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}
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t1000 = milliCelsius(0, 0b11000000)
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if t1000 != 750 {
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t.Fatal(t1000)
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}
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t1000 = milliCelsius(1, 0b00000000)
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if t1000 != 1000 {
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t.Fatal(t1000)
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}
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t1000 = milliCelsius(2, 0b00000000)
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if t1000 != 2000 {
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t.Fatal(t1000)
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}
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// highest temperature is 127.750C
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t1000 = milliCelsius(0x7f, 0b11000000)
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if t1000 != 127750 {
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t.Fatal(t1000)
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}
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}
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func TestNegativeMilliCelsius(t *testing.T) {
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t1000 := milliCelsius(0xff, 0b11000000)
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if t1000 != -250 {
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t.Fatal(t1000)
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}
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t1000 = milliCelsius(0xff, 0b10000000)
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if t1000 != -500 {
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t.Fatal(t1000)
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}
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t1000 = milliCelsius(0xff, 0b01000000)
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if t1000 != -750 {
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t.Fatal(t1000)
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}
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t1000 = milliCelsius(0xff, 0b00000000)
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if t1000 != -1000 {
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t.Fatal(t1000)
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}
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t1000 = milliCelsius(0xfe, 0b00000000)
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if t1000 != -2000 {
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t.Fatal(t1000)
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}
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// lowest temperature is -128.000C
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t1000 = milliCelsius(0x80, 0b00000000)
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if t1000 != -128000 {
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t.Fatal(t1000)
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}
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}
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