From 83847012f9b0a0d479725d4741c551c88d7035c2 Mon Sep 17 00:00:00 2001
From: Jan Breuer <jan.breuer@jaybee.cz>
Date: 周六, 25 4月 2015 22:54:36 +0800
Subject: [PATCH] Solve #16 Multiple Identical Capabilities
---
libscpi/src/ieee488.c | 111 +++++++++++++++++++++++++++++++++++--------------------
1 files changed, 70 insertions(+), 41 deletions(-)
diff --git a/libscpi/src/ieee488.c b/libscpi/src/ieee488.c
index 513ed90..e91d62a 100644
--- a/libscpi/src/ieee488.c
+++ b/libscpi/src/ieee488.c
@@ -43,10 +43,26 @@
/**
* Update register value
+ * @param context
* @param name - register name
*/
-static void SCPI_RegUpdate(scpi_t * context, scpi_reg_name_t name) {
+static void regUpdate(scpi_t * context, scpi_reg_name_t name) {
SCPI_RegSet(context, name, SCPI_RegGet(context, name));
+}
+
+/**
+ * Update STB register according to value and its mask register
+ * @param context
+ * @param val value of register
+ * @param mask name of mask register (enable register)
+ * @param stbBits bits to clear or set in STB
+ */
+static void regUpdateSTB(scpi_t * context, scpi_reg_val_t val, scpi_reg_name_t mask, scpi_reg_val_t stbBits) {
+ if (val & SCPI_RegGet(context, mask)) {
+ SCPI_RegSetBits(context, SCPI_REG_STB, stbBits);
+ } else {
+ SCPI_RegClearBits(context, SCPI_REG_STB, stbBits);
+ }
}
/**
@@ -62,10 +78,18 @@
}
}
-static size_t writeControl(scpi_t * context, int ctrl, scpi_reg_val_t val) {
+/**
+ * Wrapper function to control interface from context
+ * @param context
+ * @param ctrl number of controll message
+ * @param value value of related register
+ */
+static size_t writeControl(scpi_t * context, scpi_ctrl_name_t ctrl, scpi_reg_val_t val) {
if (context && context->interface && context->interface->control) {
- context->interface->control(context, ctrl, val);
- }
+ return context->interface->control(context, ctrl, val);
+ } else {
+ return 0;
+ }
}
/**
@@ -74,69 +98,64 @@
* @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
+ /* set register value */
context->registers[name] = val;
+ /** @TODO: remove recutsion */
switch (name) {
case SCPI_REG_STB:
mask = SCPI_RegGet(context, SCPI_REG_SRE);
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;
}
break;
case SCPI_REG_SRE:
- SCPI_RegUpdate(context, SCPI_REG_STB);
+ regUpdate(context, SCPI_REG_STB);
break;
case SCPI_REG_ESR:
- if (val & SCPI_RegGet(context, SCPI_REG_ESE)) {
- SCPI_RegSetBits(context, SCPI_REG_STB, STB_ESR);
- } else {
- SCPI_RegClearBits(context, SCPI_REG_STB, STB_ESR);
- }
+ regUpdateSTB(context, val, SCPI_REG_ESE, STB_ESR);
break;
case SCPI_REG_ESE:
- SCPI_RegUpdate(context, SCPI_REG_ESR);
+ regUpdate(context, SCPI_REG_ESR);
break;
case SCPI_REG_QUES:
- if (val & SCPI_RegGet(context, SCPI_REG_QUESE)) {
- SCPI_RegSetBits(context, SCPI_REG_STB, STB_QES);
- } else {
- SCPI_RegClearBits(context, SCPI_REG_STB, STB_QES);
- }
+ regUpdateSTB(context, val, SCPI_REG_QUESE, STB_QES);
break;
case SCPI_REG_QUESE:
- SCPI_RegUpdate(context, SCPI_REG_QUES);
+ regUpdate(context, SCPI_REG_QUES);
break;
case SCPI_REG_OPER:
- if (val & SCPI_RegGet(context, SCPI_REG_OPERE)) {
- SCPI_RegSetBits(context, SCPI_REG_STB, STB_OPS);
- } else {
- SCPI_RegClearBits(context, SCPI_REG_STB, STB_OPS);
- }
+ regUpdateSTB(context, val, SCPI_REG_OPERE, STB_OPS);
break;
case SCPI_REG_OPERE:
- SCPI_RegUpdate(context, SCPI_REG_OPER);
+ regUpdate(context, SCPI_REG_OPER);
break;
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) {
@@ -162,10 +181,12 @@
SCPI_RegSet(context, name, SCPI_RegGet(context, name) & ~bits);
}
-/* ============ */
-
+/**
+ * Clear event register
+ * @param context
+ */
void SCPI_EventClear(scpi_t * context) {
- // TODO
+ /* TODO */
SCPI_RegSet(context, SCPI_REG_ESR, 0);
}
@@ -219,13 +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;
}
@@ -245,7 +277,7 @@
* @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;
}
@@ -301,11 +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;
}
@@ -316,7 +345,7 @@
*/
scpi_result_t SCPI_CoreWai(scpi_t * context) {
(void) context;
- // NOP
+ /* NOP */
return SCPI_RES_OK;
}
--
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