X-Git-Url: https://the.earth.li/gitweb/?a=blobdiff_plain;f=main.c;h=bcc4008fb06047bb719be722feeba1a856712947;hb=refs%2Fheads%2Fmain;hp=fff2ae8df7d32a5fc90c10a99a86c8d517e9c667;hpb=3c727aad6ec52918a14a6550349a2e2ca35d0645;p=temper-clone.git

diff --git a/main.c b/main.c
index fff2ae8..bcc4008 100644
--- a/main.c
+++ b/main.c
@@ -30,6 +30,9 @@
 #include "usbdrv.h"
 #include "libs-device/osccal.h"
 
+#include "timer.h"
+#include "w1.h"
+
 typedef struct {
 	uint8_t modifier;
 	uint8_t reserved;
@@ -37,6 +40,10 @@ typedef struct {
 } keyboard_report_t;
 keyboard_report_t keyboard_report;
 
+uint8_t temp_state = 0;
+uint16_t last_temp = 0xFFFD;
+#define TEMP_INTERVAL (10 * 1000)
+
 uint8_t temp_report[8];
 bool have_temp_int = false;
 
@@ -190,6 +197,30 @@ PROGMEM const char usbDescriptorConfiguration[] = {
 	USB_CFG_INTR_POLL_INTERVAL,	/* in ms */
 };
 
+inline char hexdigit(unsigned int i)
+{
+	return (i < 10) ? ('0' + i) : ('A' - 10 + i);
+}
+
+/* Look for a 1-Wire device and use its ROMID to set the serial ID */
+void set_serial(void)
+{
+	uint8_t buf[8];
+	uint8_t i;
+
+	if (!w1_reset()) {
+		return;
+	}
+
+	w1_write(0x33);		/* READ ROM */
+	w1_read(buf, 8);
+
+	for (i = 0; i < 8; i++) {
+		serno_str[i * 2 + 1] = hexdigit(buf[i] >> 4);
+		serno_str[i * 2 + 2] = hexdigit(buf[i] & 0xF);
+	}
+}
+
 usbMsgLen_t usbFunctionDescriptor(usbRequest_t *rq)
 {
 	if (rq->wValue.bytes[1] == USBDESCR_STRING &&
@@ -256,6 +287,7 @@ usbMsgLen_t usbFunctionSetup(uchar data[8])
 usbMsgLen_t usbFunctionWrite(uint8_t * data, uchar len)
 {
 	if (len == 1) {
+		PORTB |= 1 << PB1; // LED on
 		if (data[0] != ledstate) {
 			ledstate = data[0];
 
@@ -275,13 +307,12 @@ usbMsgLen_t usbFunctionWrite(uint8_t * data, uchar len)
 
 		if (data[1] == 0x80 && data[2] == 0x33 && data[3] == 1) {
 			/* Temperature query */
+			memset(temp_report, 0, 8);
 			have_temp_int = true;
 			temp_report[0] = 0x80;
 			temp_report[1] = 2;
-			/* Fake 15°C */
-			temp_report[2] = 0xF;
-			temp_report[3] = 0x0;
-
+			temp_report[2] = last_temp >> 8;
+			temp_report[3] = last_temp & 0xFF;
 		} else if (data[1] == 0x82 && data[2] == 0x77 &&
 				data[3] == 1) {
 			/* Initialisation Query #1 */
@@ -302,23 +333,35 @@ 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;
+	uint8_t buf[9];
+	unsigned long last_temp_time = 0;
 
 	wdt_enable(WDTO_1S);
 
-	usbInit();
-	usbDeviceDisconnect();
+	w1_setup();
+	set_serial();
+	timer_init();
 
+	usbDeviceDisconnect();
 	i = 0;
 	while (--i) {
 		wdt_reset();
 		_delay_ms(1);
 	}
-
 	usbDeviceConnect();
 
+	usbInit();
+
 	/* PB1 as output for LED */
 	DDRB |= 1 << PB1;
 
@@ -342,5 +385,46 @@ int main(void)
 				have_temp_int = false;
 			}
 		}
+
+		if (temp_state == 1) {
+			if (w1_reset()) {
+				temp_state++;
+			} else {
+				temp_state = 0;
+			}
+		} else if (temp_state == 2) {
+			w1_write(0xCC);		/* SKIP ROM */
+			temp_state++;
+		} else if (temp_state == 3) {
+			w1_write(0x44);		/* Convert T */
+			temp_state++;
+		} else if (temp_state == 4) {
+			if (w1_read_bit())
+				temp_state++;
+		} else if (temp_state == 5) {
+			if (w1_reset()) {
+				temp_state++;
+			} else {
+				temp_state = 0;
+			}
+		} else if (temp_state == 6) {
+			w1_write(0xCC);		/* SKIP ROM */
+			temp_state++;
+		} else if (temp_state == 7) {
+			w1_write(0xBE);		/* Read Scratchpad */
+			temp_state++;
+		} else if (temp_state > 7 && temp_state < 17) {
+			buf[temp_state - 8] = w1_read_byte();
+			temp_state++;
+		} else if (temp_state == 17) {
+			last_temp = buf[1] << 12 | buf[0] << 4;
+			temp_state = 0;
+			last_temp_time = millis();
+		}
+
+		if (temp_state == 0 &&
+				(millis() - last_temp_time) > TEMP_INTERVAL) {
+			temp_state = 1;
+		}
 	}
 }