From: Teodor Sigaev <teodor@sigaev.ru>
Date: Wed, 25 May 2016 21:55:21 +0000 (+0300)
Subject: add trinketSetAlarmLevel
X-Git-Url: http://sigaev.ru/git/gitweb.cgi?a=commitdiff_plain;h=HEAD;p=trinked.git

add trinketSetAlarmLevel
---

diff --git a/trinket.c b/trinket.c
index fa6598d..002687c 100644
--- a/trinket.c
+++ b/trinket.c
@@ -28,6 +28,8 @@
 
 #include <stdint.h>
 #include <stdio.h>
+#include <string.h>
+
 #include <hidapi/hidapi.h>
 
 #include <tlog.h>
@@ -278,3 +280,82 @@ trinketGetCumDose(double *value) {
 
 	return ERR_OK;
 }
+
+TrinketErrorCode
+trinketSetAlarmLevel(double value[N_ALARM_LEVELS]) {
+	const TrinketProtoDesc	*proto = &protoDesc[CMD_ALARM_LEVELS];
+	struct {
+		ProtoHeader header;
+		uint8_t		begin;
+		uint8_t		len;
+		uint8_t		cmd;
+		float		levels[N_ALARM_LEVELS];
+		uint8_t		end;
+	} cmd = {
+					{REPORT_ID, proto->cmdLen},
+					BEGIN_COMMAND,
+					proto->cmdLen,
+					proto->cmdId,
+					{0,0,0,0,0},
+					END_COMMAND
+	};
+	struct packed_struct {
+		ProtoHeader header;
+		uint8_t		begin;
+		uint16_t	len;
+		float		payload[N_ALARM_LEVELS];
+		uint8_t		end;
+	} resp;
+	int	r;
+
+	tassert(proto->cmdId == CMD_ALARM_LEVELS);
+	tassert(sizeof(cmd) == cmd.len + sizeof(ProtoHeader));
+	tassert(sizeof(resp) == proto->respLen + sizeof(ProtoHeader));
+
+	memcpy(cmd.levels, value, sizeof(value[0]) * N_ALARM_LEVELS);
+
+	r = hid_write(trinketDev, (unsigned char*)&cmd, sizeof(cmd));
+
+	if (r < 0 || r != sizeof(cmd)) {
+		tlog(TL_WARN, "hid_send_feature_report  returns %d instead of %u", r, cmd.len);
+		return ERR_ERROR;
+	}
+
+	/* must be assigned to 0x3F by the host */
+	resp.header.reportId = REPORT_ID;
+
+	r = hid_read_timeout(trinketDev, (unsigned char*)&resp, sizeof(resp), DEV_TIMEOUT);
+	if (r < 0) {
+		tlog(TL_WARN, "hid_read_timeout fails");
+		return  ERR_NO_ANSWER;
+	}
+
+	if (r != sizeof(resp)) {
+		tlog(TL_WARN, "hid_read_timeout  returns %d instead of %u", r, (unsigned int)sizeof(resp));
+		return ERR_ERROR;
+	}
+
+	if (resp.header.reportId != REPORT_ID) {
+		tlog(TL_WARN, "hid_read_timeout  returns report id %02x instead of %02x", resp.header.reportId, REPORT_ID);
+		return ERR_ERROR;
+	}
+
+	if (resp.header.size != proto->respLen) {
+		tlog(TL_WARN, "hid_read_timeout returns length %u intsead if %u", resp.header.size, proto->respLen);
+		return ERR_PROTO;
+	}
+
+	if (resp.len != proto->respLen) {
+		tlog(TL_WARN, "hid_read_timeout response length %u instead of %u", resp.len, proto->respLen);
+		return ERR_PROTO;
+	}
+
+	if (!(resp.begin == ACK_ANSWER_OK && resp.end == END_ANSWER)) {
+		tlog(TL_WARN, "hid_read_timeout  ACK %02x and ETB %02x", resp.begin, resp.end);
+		return ERR_PROTO;
+	}
+
+	memcpy(value, resp.payload, sizeof(value[0]) * N_ALARM_LEVELS);
+
+	return ERR_OK;
+}
diff --git a/trinket.h b/trinket.h
index 2f7fba9..5c38f16 100644
--- a/trinket.h
+++ b/trinket.h
@@ -39,5 +39,6 @@ TrinketErrorCode	trinketOpen();
 void				trinketClose();
 TrinketErrorCode	trinketPing();
 TrinketErrorCode	trinketGetCumDose(double *value);
-
+#define N_ALARM_LEVELS  (5)
+TrinketErrorCode	trinketSetAlarmLevel(double value[N_ALARM_LEVELS]);
 #endif