Changeset 565 for trunk/modules/vci_spi/caba/source/src

Timestamp:

Oct 26, 2013, 5:34:58 PM (11 years ago)

Author:

bouyer

Message:

prefix some register name with spi_ for readability
Can't write r_ctrl_go_bsy from both VCI and SPI FSMs. Add a r_spi_done signal
which resets r_ctrl_go_bsy in the VCI fsm.

File:

• trunk/modules/vci_spi/caba/source/src/vci_spi.cpp (modified) (6 diffs)

trunk/modules/vci_spi/caba/source/src/vci_spi.cpp

@@ -55 +55 @@
         r_ctrl_cpha       = false;
         r_ctrl_go_bsy     = false;
-        r_clk_counter     = 0xffff;
+        r_spi_clk_counter     = 0xffff;
         r_spi_clk        = 0;
+        r_spi_done        = false;
 
         r_irq             = false;
@@ -68 +69 @@
     // r_target_fsm, r_irq_enable, r_nblocks, r_buf adress, r_lba, r_go, r_read
     //////////////////////////////////////////////////////////////////////////////
+
+    if (r_spi_done)
+        r_ctrl_go_bsy = false;
 
     switch(r_target_fsm) {
@@ -210 +214 @@
     // the SPI FSM controls SPI signals
     //////////////////////////////////////////////////////////////////////////////
+    if (r_ctrl_go_bsy == false)
+        r_spi_done = false;
     switch (r_spi_fsm) {
     case S_IDLE:
-        r_clk_counter = r_divider.read();
+        r_spi_clk_counter = r_divider.read();
         r_spi_clk = 0;
         r_spi_clk_previous = r_ctrl_cpha;
         r_spi_clk_ignore = r_ctrl_cpha;
-        r_bit_count = r_ctrl_char_len;
+        r_spi_bit_count = r_ctrl_char_len;
         r_spi_out = (r_txrx[(r_ctrl_char_len -1)/ 64] >> ((r_ctrl_char_len - 1) % 64)) & (uint64_t)0x0000000000000001ULL;
-        if (r_ctrl_go_bsy.read())
+        if (r_ctrl_go_bsy.read() && !r_spi_done.read())
                 r_spi_fsm = S_XMIT;
         break;
@@ -231 +237 @@
                 r_txrx[1] = (r_txrx[1] << 1) | (r_txrx[0] >> 63);
                 r_txrx[0] = (r_txrx[0] << 1) | p_spi_miso;
-                r_bit_count = r_bit_count - 1;
+                r_spi_bit_count = r_spi_bit_count - 1;
             } else if (r_spi_clk_previous == 1 && s_clk_sample == 0) {
                 // high to low transition: change output, or stop
-                if (r_bit_count == 0) {
+                if (r_spi_bit_count == 0) {
                     r_spi_fsm = S_IDLE;
                     r_irq = r_ctrl_ie;
-                    r_ctrl_go_bsy = false;
+                    r_spi_done = true;
 #ifdef SOCLIB_MODULE_DEBUG0
                     std::cout << name() << " end xfer " << std::dec << (int)r_ctrl_char_len.read() << " data " << std::hex << r_txrx[1] << " " << r_txrx[0] << std::endl;
@@ -248 +254 @@
         r_spi_clk_previous = s_clk_sample;
         // generate the SPI clock
-        if (r_clk_counter.read() == 0) {
-            r_clk_counter = r_divider.read();
+        if (r_spi_clk_counter.read() == 0) {
+            r_spi_clk_counter = r_divider.read();
             r_spi_clk = !r_spi_clk.read();
             r_spi_clk_ignore = false;
         } else {
-            r_clk_counter = r_clk_counter.read() - 1;
+            r_spi_clk_counter = r_spi_clk_counter.read() - 1;
         }
         break;
@@ -766 +772 @@
             << std::endl;
         std::cout << name() << " _SPI : " << spi_str[r_spi_fsm.read()] 
-            << " clk_counter " << r_clk_counter.read()
-            << " r_bit_count " << r_bit_count.read() 
+            << " clk_counter " << r_spi_clk_counter.read()
+            << " r_spi_bit_count " << r_spi_bit_count.read() 
             << " r_ctrl_go_bsy " << (int)r_ctrl_go_bsy.read() << std::endl;
         std::cout << name() << " _SPI : "