feat: onewire and ds18b20 driver

2024-11-28 02:35:59 +08:00
parent 31482c9a70
commit 8edaf36a1a
9 changed files with 141 additions and 105 deletions
--- a/lib/ds18b20/ds18b20.c
+++ b/lib/ds18b20/ds18b20.c
@ -0,0 +1,18 @@
+#include "ds18b20.h"
+#include "onewire.h"
+
+void DS18B20_startConvert(void) {
+    OneWire_init();
+    OneWire_writeByte(DS18B20_SKIP_ROM);
+    OneWire_writeByte(DS18B20_CONVERT_TEMP);
+}
+
+int DS18B20_readTemperature(void) {
+    OneWire_init();
+    OneWire_writeByte(DS18B20_SKIP_ROM);
+    OneWire_writeByte(DS18B20_READ_SCRATCHPAD);
+    uchar T_LSB = OneWire_readByte();
+    uchar T_MSB = OneWire_readByte();
+    int temp = T_MSB << 8 | T_LSB;
+    return temp;
+}