From 4f960d20c76cb67e206a62f0e6c7608d75693ddc Mon Sep 17 00:00:00 2001
From: Jan Breuer <jan.breuer@mobatime.cz>
Date: 周三, 16 8月 2017 22:51:29 +0800
Subject: [PATCH] Add dependency on libm as required by #93
---
libscpi/src/ieee488.c | 18 ++++++++++++++++--
1 files changed, 16 insertions(+), 2 deletions(-)
diff --git a/libscpi/src/ieee488.c b/libscpi/src/ieee488.c
index 55a9e22..6ae5437 100644
--- a/libscpi/src/ieee488.c
+++ b/libscpi/src/ieee488.c
@@ -51,6 +51,17 @@
}
/**
+ * Update latching event register value based on bit transitions from 0 -> 1
+ * in the condition register
+ * @param context
+ * @param condReg - condition register name
+ * @param eventReg - event register name
+ */
+static void regUpdateEvent(scpi_t * context, scpi_reg_val_t oldCondVal, scpi_reg_val_t newCondVal, scpi_reg_name_t eventReg) {
+ SCPI_RegSet(context, eventReg, ((oldCondVal ^ newCondVal) & newCondVal) | SCPI_RegGet(context, eventReg));
+}
+
+/**
* Update STB register according to value and its mask register
* @param context
* @param val value of register
@@ -71,7 +82,7 @@
* @return register value
*/
scpi_reg_val_t SCPI_RegGet(scpi_t * context, scpi_reg_name_t name) {
- if ((name < SCPI_REG_COUNT) && (context->registers != NULL)) {
+ if ((name < SCPI_REG_COUNT) && context) {
return context->registers[name];
} else {
return 0;
@@ -102,7 +113,7 @@
scpi_reg_val_t mask;
scpi_reg_val_t old_val;
- if ((name >= SCPI_REG_COUNT) || (context->registers == NULL)) {
+ if ((name >= SCPI_REG_COUNT) || (context == NULL)) {
return;
}
@@ -148,6 +159,9 @@
case SCPI_REG_OPERE:
regUpdate(context, SCPI_REG_OPER);
break;
+ case SCPI_REG_OPERC:
+ regUpdateEvent(context, old_val, val, SCPI_REG_OPER);
+ break;
case SCPI_REG_COUNT:
--
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