From: Jonathan McDowell <noodles@earth.li>
Date: Tue, 8 May 2018 20:45:13 +0000 (+0100)
Subject: Reset 1-Wire state if we get a USB reset
X-Git-Url: https://the.earth.li/gitweb/?a=commitdiff_plain;h=b45ff61935c58083c18d718c410604489080af76;p=temper-clone.git

Reset 1-Wire state if we get a USB reset

A client can decide to reset us if we fail to reply to USB messages
appropriately while doing the 1-Wire bits for temperature retrieval.
This may leave us in the state were we have a message ready to go,
but the client isn't going to read it. If we see a USB reset, reset
our state and clear any indication that we have a message to go.
---

diff --git a/libs-device/osccal.h b/libs-device/osccal.h
index 3452aa7..a1fb2ef 100644
--- a/libs-device/osccal.h
+++ b/libs-device/osccal.h
@@ -43,7 +43,8 @@ deviation! All other frequency modules require at least 0.2% precision.
 
 #ifndef __ASSEMBLER__
 void    calibrateOscillatorASM(void);
-#define USB_RESET_HOOK(resetStarts)  if(!resetStarts){ calibrateOscillatorASM();}
+void    hadUsbReset(void);
+#define USB_RESET_HOOK(resetStarts)  if(!resetStarts){ calibrateOscillatorASM(); hadUsbReset();}
 #endif
 /* This function calibrates the RC oscillator so that the CPU runs at F_CPU.
  * It MUST be called immediately after the end of a USB RESET condition!
diff --git a/main.c b/main.c
index 0adfed8..61064a0 100644
--- a/main.c
+++ b/main.c
@@ -358,6 +358,13 @@ usbMsgLen_t usbFunctionWrite(uint8_t * data, uchar len)
 	return 0;
 }
 
+void hadUsbReset(void)
+{
+	/* Reset our state machine back to having nothing to send */
+	temp_state = 0;
+	have_temp_int = false;
+}
+
 int main(void)
 {
 	unsigned char i;