Change in simtrace2[master]: firmware: octsimtest: mcp23017 initializaiton

[laforge]

laforge has uploaded this change for review. ( 
https://gerrit.osmocom.org/c/simtrace2/+/24534 )


Change subject: firmware: octsimtest: mcp23017 initializaiton
......................................................................

firmware: octsimtest: mcp23017 initializaiton

* driver should not have hard-coded understanding about I/O directions
* board code should pass the I/O direction to driver
* board code should use the correct I/O directions (A0..7, B0: output)

Change-Id: Id4a8e012a33cee01bb489e612e17920760b9be59
---
M firmware/libboard/octsimtest/include/mcp23017.h
M firmware/libboard/octsimtest/source/board_octsimtest.c
M firmware/libboard/octsimtest/source/mcp23017.c
3 files changed, 20 insertions(+), 10 deletions(-)



  git pull ssh://gerrit.osmocom.org:29418/simtrace2 refs/changes/34/24534/1

diff --git a/firmware/libboard/octsimtest/include/mcp23017.h 
b/firmware/libboard/octsimtest/include/mcp23017.h
index 962a1d5..c0f4b13 100644
--- a/firmware/libboard/octsimtest/include/mcp23017.h
+++ b/firmware/libboard/octsimtest/include/mcp23017.h
@@ -18,7 +18,7 @@

 #define MCP23017_ADDRESS 0x20

-int mcp23017_init(uint8_t slave);
+int mcp23017_init(uint8_t slave, uint8_t iodira, uint8_t iodirb);
 int mcp23017_test(uint8_t slave);
 int mcp23017_toggle(uint8_t slave);
 //int mcp23017_write_byte(uint8_t slave, uint8_t addr, uint8_t byte);
diff --git a/firmware/libboard/octsimtest/source/board_octsimtest.c 
b/firmware/libboard/octsimtest/source/board_octsimtest.c
index 85d8aab..404bef6 100644
--- a/firmware/libboard/octsimtest/source/board_octsimtest.c
+++ b/firmware/libboard/octsimtest/source/board_octsimtest.c
@@ -17,6 +17,7 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307, USA
  */
+#include <stdbool.h>
 #include "board.h"
 #include "simtrace.h"
 #include "utils.h"
@@ -27,6 +28,8 @@
 #include "mcp23017.h"
 #include "mux.h"

+static bool mcp2317_present = false;
+
 void board_exec_dbg_cmd(int ch)
 {
        switch (ch) {
@@ -69,8 +72,9 @@

        mux_init();
        i2c_pin_init();
-       if (!mcp23017_init(MCP23017_ADDRESS))
-               printf("mcp23017 not found!\n\r");
+       /* PORT A: all outputs, Port B0 output, B1..B7 unused */
+       if (mcp23017_init(MCP23017_ADDRESS, 0x00, 0xfe) == 0)
+               mcp2317_present = true;
        /* Initialize checking for card insert/remove events */
        //card_present_init();
 #endif
diff --git a/firmware/libboard/octsimtest/source/mcp23017.c 
b/firmware/libboard/octsimtest/source/mcp23017.c
index 167bf34..a4d055f 100644
--- a/firmware/libboard/octsimtest/source/mcp23017.c
+++ b/firmware/libboard/octsimtest/source/mcp23017.c
@@ -92,19 +92,25 @@
                return 0;
 }

-int mcp23017_init(uint8_t slave)
+int mcp23017_init(uint8_t slave, uint8_t iodira, uint8_t iodirb)
 {
        printf("mcp23017_init\n\r");
+
        // all gpio input
-       if (mcp23017_write_byte(slave, MCP23017_IODIRA, 0xff))
-               return false;
+       if (mcp23017_write_byte(slave, MCP23017_IODIRA, iodira))
+               goto out_err;
        // msb of portb output, rest input
-       if (mcp23017_write_byte(slave, MCP23017_IODIRB, 0x7f))
-               return false;
+       if (mcp23017_write_byte(slave, MCP23017_IODIRB, iodirb))
+               goto out_err;
        if (mcp23017_write_byte(slave, MCP23017_IOCONA, 0x20)) //disable SEQOP 
(autoinc addressing)
-               return false;
+               goto out_err;
+
        printf("mcp23017 found\n\r");
-       return true;
+       return 0;
+
+out_err:
+       printf("mcp23017 NOT found!\n\r");
+       return -1;
 }

 int mcp23017_test(uint8_t slave)

--
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Gerrit-Project: simtrace2
Gerrit-Branch: master
Gerrit-Change-Id: Id4a8e012a33cee01bb489e612e17920760b9be59
Gerrit-Change-Number: 24534
Gerrit-PatchSet: 1
Gerrit-Owner: laforge <lafo...@osmocom.org>
Gerrit-MessageType: newchange