From a2006d9935f97a233f75942e1a3eab69f27cf4b3 Mon Sep 17 00:00:00 2001
From: Jan Breuer <jan.breuer@jaybee.cz>
Date: 周日, 19 4月 2015 17:59:23 +0800
Subject: [PATCH] Update c++ example, make special numbers more correct
---
libscpi/src/ieee488.c | 34 ++++++++++++++++++++++++----------
1 files changed, 24 insertions(+), 10 deletions(-)
diff --git a/libscpi/src/ieee488.c b/libscpi/src/ieee488.c
index e3f4629..e91d62a 100644
--- a/libscpi/src/ieee488.c
+++ b/libscpi/src/ieee488.c
@@ -98,13 +98,16 @@
* @param val - new value
*/
void SCPI_RegSet(scpi_t * context, scpi_reg_name_t name, scpi_reg_val_t val) {
- bool_t srq = FALSE;
+ scpi_bool_t srq = FALSE;
scpi_reg_val_t mask;
+ scpi_reg_val_t old_val;
if ((name >= SCPI_REG_COUNT) || (context->registers == NULL)) {
return;
}
+ /* store old register value */
+ old_val = context->registers[name];
/* set register value */
context->registers[name] = val;
@@ -116,7 +119,10 @@
mask &= ~STB_SRQ;
if (val & mask) {
val |= STB_SRQ;
- srq = TRUE;
+ /* avoid sending SRQ if nothing has changed */
+ if (old_val != val) {
+ srq = TRUE;
+ }
} else {
val &= ~STB_SRQ;
}
@@ -234,13 +240,24 @@
/**
* *IDN?
+ *
+ * field1: MANUFACTURE
+ * field2: MODEL
+ * field4: SUBSYSTEMS REVISIONS
+ *
+ * example: MANUFACTURE,MODEL,0,01-02-01
* @param context
* @return
*/
scpi_result_t SCPI_CoreIdnQ(scpi_t * context) {
- SCPI_ResultString(context, SCPI_MANUFACTURE);
- SCPI_ResultString(context, SCPI_DEV_NAME);
- SCPI_ResultString(context, SCPI_DEV_VERSION);
+ int i;
+ for (i = 0; i<4; i++) {
+ if (context->idn[i]) {
+ SCPI_ResultMnemonic(context, context->idn[i]);
+ } else {
+ SCPI_ResultMnemonic(context, "0");
+ }
+ }
return SCPI_RES_OK;
}
@@ -316,11 +333,8 @@
* @return
*/
scpi_result_t SCPI_CoreTstQ(scpi_t * context) {
- int result = 0;
- if (context && context->interface && context->interface->test) {
- result = context->interface->test(context);
- }
- SCPI_ResultInt(context, result);
+ (void) context;
+ SCPI_ResultInt(context, 0);
return SCPI_RES_OK;
}
--
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