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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
This commit is contained in:
Harald Welte 2021-06-03 13:19:46 +02:00
parent d46f6bae2c
commit dd5794c975
3 changed files with 20 additions and 10 deletions
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2
firmware/libboard/octsimtest/include/mcp23017.h
View File

@ -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);

8
firmware/libboard/octsimtest/source/board_octsimtest.c
View File

@ -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 @@ void board_main_top(void)
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

20
firmware/libboard/octsimtest/source/mcp23017.c
View File

@ -92,19 +92,25 @@ out_stop:
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)