diff options
Diffstat (limited to 'commandline/i2c-util.c')
| -rw-r--r-- | commandline/i2c-util.c | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/commandline/i2c-util.c b/commandline/i2c-util.c index a060a03..8033d12 100644 --- a/commandline/i2c-util.c +++ b/commandline/i2c-util.c @@ -36,6 +36,9 @@ obtained from http://libusb.sourceforge.net/. #define PSCMD_OFF 3 /* These are the vendor specific SETUP commands implemented by our USB device */ +char bit_sda = 6; +char bit_scl = 7; + usb_dev_handle *handle = NULL; static int usbGetStringAscii(usb_dev_handle * dev, int index, int langid, char @@ -193,22 +196,22 @@ static void verify_high(unsigned char bit, char *bitname) void verify_sda_low() { - verify_low(BIT_SDA, "SDA"); + verify_low(bit_sda, "SDA"); } void verify_sda_high() { - verify_high(BIT_SDA, "SDA"); + verify_high(bit_sda, "SDA"); } void verify_scl_low() { - verify_low(BIT_SCL, "SCL"); + verify_low(bit_scl, "SCL"); } void verify_scl_high() { - verify_high(BIT_SCL, "SCL"); + verify_high(bit_scl, "SCL"); } /* @@ -224,7 +227,7 @@ void set_sda(char value) usb_control_msg(handle, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_IN, - (value ? PSCMD_ON : PSCMD_OFF), 0, BIT_SDA, + (value ? PSCMD_ON : PSCMD_OFF), 0, bit_sda, (char *)buffer, sizeof(buffer), 5000); } @@ -235,7 +238,7 @@ void set_scl(char value) usb_control_msg(handle, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_IN, - (value ? PSCMD_ON : PSCMD_OFF), 0, BIT_SCL, + (value ? PSCMD_ON : PSCMD_OFF), 0, bit_scl, (char *)buffer, sizeof(buffer), 5000); } @@ -255,7 +258,7 @@ unsigned char i2c_tx_byte(unsigned char byte) set_scl(1); usleep(100); if (i < 0) { - if (get_status() & (1 << BIT_SDA)) + if (get_status() & (1 << bit_sda)) ack = 0; else ack = 1; @@ -278,7 +281,7 @@ unsigned char i2c_rx_byte(unsigned char send_ack) set_sda(0); set_scl(1); usleep(100); - if ((i >= 0) && ( get_status() & (1 << BIT_SDA))) + if ((i >= 0) && ( get_status() & (1 << bit_sda))) ret |= (1 << i); if (( i < 0) && send_ack) set_sda(1); |