From 1ea396b98ee06b0ec56403b70d553ccc5b379b9a Mon Sep 17 00:00:00 2001
From: Jan Breuer <jan.breuer@jaybee.cz>
Date: 周三, 19 6月 2013 18:19:44 +0800
Subject: [PATCH] Parse program data
---
libscpi/src/ieee488.c | 22 ++++++++++++++--------
1 files changed, 14 insertions(+), 8 deletions(-)
diff --git a/libscpi/src/ieee488.c b/libscpi/src/ieee488.c
index 6b4e62e..2dc0662 100644
--- a/libscpi/src/ieee488.c
+++ b/libscpi/src/ieee488.c
@@ -84,7 +84,7 @@
* @param ctrl number of controll message
* @param value value of related register
*/
-static size_t writeControl(scpi_t * context, int ctrl, scpi_reg_val_t val) {
+static size_t writeControl(scpi_t * context, scpi_ctrl_name_t ctrl, scpi_reg_val_t val) {
if (context && context->interface && context->interface->control) {
return context->interface->control(context, ctrl, val);
} else {
@@ -100,11 +100,14 @@
void SCPI_RegSet(scpi_t * context, scpi_reg_name_t name, scpi_reg_val_t val) {
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;
}
@@ -145,11 +151,11 @@
case SCPI_REG_COUNT:
- // nothing to do
+ /* nothing to do */
break;
}
- // set updated register value
+ /* set updated register value */
context->registers[name] = val;
if (srq) {
@@ -180,7 +186,7 @@
* @param context
*/
void SCPI_EventClear(scpi_t * context) {
- // TODO
+ /* TODO */
SCPI_RegSet(context, SCPI_REG_ESR, 0);
}
@@ -260,7 +266,7 @@
* @return
*/
scpi_result_t SCPI_CoreOpcQ(scpi_t * context) {
- // Operation is always completed
+ /* Operation is always completed */
SCPI_ResultInt(context, 1);
return SCPI_RES_OK;
}
@@ -319,7 +325,7 @@
int result = 0;
if (context && context->interface && context->interface->test) {
result = context->interface->test(context);
- }
+ }
SCPI_ResultInt(context, result);
return SCPI_RES_OK;
}
@@ -331,7 +337,7 @@
*/
scpi_result_t SCPI_CoreWai(scpi_t * context) {
(void) context;
- // NOP
+ /* NOP */
return SCPI_RES_OK;
}
--
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