Patch for bdfe

Stubs out Linux i2c functions to allow build on cygwin to succeed. Apply with `patch -Np1 -i host/stub-i2c-bdfe.patch`

diff --git a/host/stub-i2c-bdfe.patch b/host/stub-i2c-bdfe.patch
new file mode 100644 (file)
index 0000000..19ee9d3
--- /dev/null
+++ b/host/stub-i2c-bdfe.patch
@@ -0,0 +1,100 @@
+diff -urN bdfe/li2c.c bdfe-stubi2c/li2c.c
+--- bdfe/li2c.c        2016-06-18 23:35:56.639775500 +0000
++++ bdfe-stubi2c/li2c.c        2016-06-18 23:35:15.467047200 +0000
+@@ -38,95 +38,34 @@
+       options i2c_bcm2708 baudrate=400000
+ */
+ 
+-#include <stdio.h>
+-#include <fcntl.h>
+-#include <unistd.h>
+-#include <sys/ioctl.h>
+-#include <linux/i2c-dev.h>
+-
+ #include "li2c.h"
+ 
+-/* by default RPi mode, so bus 1 is valid for RPi and Edison */
+-static li2c_mode_t i2c_mode = LI2C_RPI;
+-
+-/** i2c bus file descriptors */
+-static int i2c_bus[LI2C_MAX_BUS];
+-
+-static int is_valid_bus(uint8_t bus)
+-{
+-      if (i2c_mode == LI2C_RPI) {
+-              if (bus > PI2C_MAX_BUS)
+-                      return 0;
+-              return 1;
+-      }
+-      if (i2c_mode == LI2C_EDISON) {
+-              if (bus > EDI2C_MAX_BUS)
+-                      return 0;
+-              return 1;
+-      }
+-      return 0;
+-}
+-
+ /* select I2C mode - Raspberry or Edison for bus index validation */
+ int li2c_init(li2c_mode_t mode)
+ {
+-      for(int i = 0; i < LI2C_MAX_BUS; i++)
+-              i2c_bus[i] = -1;
+-      i2c_mode = mode;
+       return 0;
+ }
+ 
+ /** open I2C bus if not opened yet and store file descriptor */
+ int li2c_open(uint8_t bus)
+ {
+-      char bus_name[64];
+-
+-      if (!is_valid_bus(bus))
+-              return -1;
+-
+-      // already opened?
+-      if (i2c_bus[bus] >= 0)
+-              return 0;
+-
+-      // open i2c bus and store file descriptor
+-      sprintf(bus_name, "/dev/i2c-%u", bus);
+-
+-      if ((i2c_bus[bus] = open(bus_name, O_RDWR)) < 0)
+-              return -1;
+-
+       return 0;
+ }
+ 
+ /** close I2C bus file descriptor */
+ int li2c_close(uint8_t bus)
+ {
+-      if (!is_valid_bus(bus))
+-              return -1;
+-
+-      if (i2c_bus[bus] >= 0)
+-              close(i2c_bus[bus]);
+-      i2c_bus[bus] = -1;
+-
+       return 0;
+ }
+ 
+ /** select I2C device for li2c_write() calls */
+ int li2c_select(uint8_t bus, uint8_t slave)
+ {
+-      if (!is_valid_bus(bus) || (i2c_bus[bus] < 0))
+-              return -1;
+-
+-      return ioctl(i2c_bus[bus], I2C_SLAVE, slave);
++      return 0;
+ }
+ 
+ /** write to I2C device selected by li2c_select() */
+ int li2c_write(uint8_t bus, const uint8_t *data, uint32_t len)
+ {
+-      if (!is_valid_bus(bus) || (i2c_bus[bus] < 0))
+-              return -1;
+-
+-      if (write(i2c_bus[bus], data, len) != (ssize_t)len)
+-              return -1;
+-
+       return 0;
+ }