--- a/drivers/ec_master.c Fri Jan 06 10:17:35 2006 +0000
+++ b/drivers/ec_master.c Fri Jan 06 13:20:29 2006 +0000
@@ -33,9 +33,7 @@
master->rx_data_length = 0;
master->domain_count = 0;
master->debug_level = 0;
- master->tx_time = 0;
- master->rx_time = 0;
- master->rx_tries = 0;
+ master->bus_time = 0;
}
/*****************************************************************************/
@@ -250,9 +248,6 @@
printk(KERN_DEBUG "device send...\n");
}
- // Zeit nehmen
- rdtscl(master->tx_time);
-
// Send frame
if (unlikely(EtherCAT_device_send(master->dev,
master->tx_data,
@@ -995,18 +990,21 @@
/**
Sendet und empfängt Prozessdaten der angegebenen Domäne
- @param master EtherCAT-Master
- domain Domäne
+ @param master EtherCAT-Master
+ domain Domäne
+ timeout_us Timeout in Mikrosekunden
@return 0 bei Erfolg, sonst < 0
*/
-int EtherCAT_process_data_cycle(EtherCAT_master_t *master,
- unsigned int domain)
-{
- unsigned int i, tries;
- EtherCAT_domain_t *dom = NULL;
-
+int EtherCAT_process_data_cycle(EtherCAT_master_t *master, unsigned int domain,
+ unsigned int timeout_us)
+{
+ unsigned int i;
+ EtherCAT_domain_t *dom;
+ unsigned long start_ticks, end_ticks, timeout_ticks;
+
+ dom = NULL;
for (i = 0; i < master->domain_count; i++) {
if (master->domains[i].number == domain) {
dom = master->domains + i;
@@ -1023,27 +1021,26 @@
dom->logical_offset, dom->data_size,
dom->data);
+ rdtscl(start_ticks); // Sendezeit nehmen
+
if (unlikely(EtherCAT_simple_send(master, &dom->command) < 0)) {
printk(KERN_ERR "EtherCAT: Could not send process data command!\n");
return -1;
}
- udelay(3);
-
-#if 1
+ timeout_ticks = timeout_us * cpu_khz / 1000;
+
// Warten
- tries = 0;
- EtherCAT_device_call_isr(master->dev);
- while (unlikely(master->dev->state == ECAT_DS_SENT && tries < 100)) {
- udelay(1);
+ do {
EtherCAT_device_call_isr(master->dev);
- tries++;
- }
-
- rdtscl(master->rx_time);
- master->rx_tries = tries;
-
- if (unlikely(tries == 100)) {
+ rdtscl(end_ticks); // Empfangszeit nehmen
+ }
+ while (unlikely(master->dev->state == ECAT_DS_SENT
+ && end_ticks - start_ticks < timeout_ticks));
+
+ master->bus_time = (end_ticks - start_ticks) * 1000 / cpu_khz;
+
+ if (unlikely(end_ticks - start_ticks >= timeout_ticks)) {
printk(KERN_ERR "EtherCAT: Timeout while receiving process data!\n");
return -1;
}
@@ -1060,7 +1057,6 @@
// Daten vom Kommando in den Prozessdatenspeicher kopieren
memcpy(dom->data, dom->command.data, dom->data_size);
-#endif
return 0;
}