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-rw-r--r--commandline/i2c.c236
1 files changed, 5 insertions, 231 deletions
diff --git a/commandline/i2c.c b/commandline/i2c.c
index db88bac..ee0b264 100644
--- a/commandline/i2c.c
+++ b/commandline/i2c.c
@@ -1,239 +1,13 @@
-/* Name: powerSwitch.c
- * Project: PowerSwitch based on AVR USB driver
- * Author: Christian Starkjohann
- * Creation Date: 2005-01-16
- * Tabsize: 4
- * Copyright: (c) 2005 by OBJECTIVE DEVELOPMENT Software GmbH
- * License: GNU GPL v2 (see License.txt) or proprietary (CommercialLicense.txt)
- * This Revision: $Id$
- */
-
-/*
-General Description:
-This program controls the PowerSwitch USB device from the command line.
-It must be linked with libusb, a library for accessing the USB bus from
-Linux, FreeBSD, Mac OS X and other Unix operating systems. Libusb can be
-obtained from http://libusb.sourceforge.net/.
-*/
-
+#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-#include <usb.h> /* this is libusb, see http://libusb.sourceforge.net/ */
-
-
-#define BIT_SDA 6
-#define BIT_SCL 7
-
-
-#define USBDEV_SHARED_VENDOR 0x16C0 /* VOTI */
-#define USBDEV_SHARED_PRODUCT 0x05DC /* Obdev's free shared PID */
-/* Use obdev's generic shared VID/PID pair and follow the rules outlined
- * in firmware/usbdrv/USBID-License.txt.
- */
-
-#define PSCMD_ECHO 0
-#define PSCMD_GET 1
-#define PSCMD_ON 2
-#define PSCMD_OFF 3
-/* These are the vendor specific SETUP commands implemented by our USB device */
-
-
-usb_dev_handle *handle = NULL;
-
-static int usbGetStringAscii(usb_dev_handle *dev, int index, int langid, char *buf, int buflen)
-{
-char buffer[256];
-int rval, i;
-
- if((rval = usb_control_msg(dev, USB_ENDPOINT_IN, USB_REQ_GET_DESCRIPTOR, (USB_DT_STRING << 8) + index, langid, buffer, sizeof(buffer), 1000)) < 0)
- return rval;
- if(buffer[1] != USB_DT_STRING)
- return 0;
- if((unsigned char)buffer[0] < rval)
- rval = (unsigned char)buffer[0];
- rval /= 2;
- /* lossy conversion to ISO Latin1 */
- for(i=1;i<rval;i++){
- if(i > buflen) /* destination buffer overflow */
- break;
- buf[i-1] = buffer[2 * i];
- if(buffer[2 * i + 1] != 0) /* outside of ISO Latin1 range */
- buf[i-1] = '?';
- }
- buf[i-1] = 0;
- return i-1;
-}
-
-
-/* PowerSwitch uses the free shared default VID/PID. If you want to see an
- * example device lookup where an individually reserved PID is used, see our
- * RemoteSensor reference implementation.
- */
-
-#define USB_ERROR_NOTFOUND 1
-#define USB_ERROR_ACCESS 2
-#define USB_ERROR_IO 3
-
-static int usbOpenDevice(usb_dev_handle **device, int vendor, char *vendorName, int product, char *productName)
-{
-struct usb_bus *bus;
-struct usb_device *dev;
-usb_dev_handle *handle = NULL;
-int errorCode = USB_ERROR_NOTFOUND;
-static int didUsbInit = 0;
-
- if(!didUsbInit){
- didUsbInit = 1;
- usb_init();
- }
- usb_find_busses();
- usb_find_devices();
- for(bus=usb_get_busses(); bus; bus=bus->next){
- for(dev=bus->devices; dev; dev=dev->next){
- if(dev->descriptor.idVendor == vendor && dev->descriptor.idProduct == product){
- char string[256];
- int len;
- handle = usb_open(dev); /* we need to open the device in order to query strings */
- if(!handle){
- errorCode = USB_ERROR_ACCESS;
- fprintf(stderr, "Warning: cannot open USB device: %s\n", usb_strerror());
- continue;
- }
- if(vendorName == NULL && productName == NULL){ /* name does not matter */
- break;
- }
- /* now check whether the names match: */
- len = usbGetStringAscii(handle, dev->descriptor.iManufacturer, 0x0409, string, sizeof(string));
- if(len < 0){
- errorCode = USB_ERROR_IO;
- fprintf(stderr, "Warning: cannot query manufacturer for device: %s\n", usb_strerror());
- }else{
- errorCode = USB_ERROR_NOTFOUND;
- /* fprintf(stderr, "seen device from vendor ->%s<-\n", string); */
- if(strcmp(string, vendorName) == 0){
- len = usbGetStringAscii(handle, dev->descriptor.iProduct, 0x0409, string, sizeof(string));
- if(len < 0){
- errorCode = USB_ERROR_IO;
- fprintf(stderr, "Warning: cannot query product for device: %s\n", usb_strerror());
- }else{
- errorCode = USB_ERROR_NOTFOUND;
- /* fprintf(stderr, "seen product ->%s<-\n", string); */
- if(strcmp(string, productName) == 0)
- break;
- }
- }
- }
- usb_close(handle);
- handle = NULL;
- }
- }
- if(handle)
- break;
- }
- if(handle != NULL){
- errorCode = 0;
- *device = handle;
- }
- return errorCode;
-}
-
-
-static unsigned char get_status()
-{
- unsigned char buffer[8];
- int nBytes = usb_control_msg(handle, USB_TYPE_VENDOR | USB_RECIP_DEVICE |
- USB_ENDPOINT_IN, PSCMD_GET, 0, 0, (char *)buffer, sizeof(buffer), 5000);
-
- if (nBytes < 2) {
- fprintf(stderr, "ERR: read status: got %d bytes, expected 2\n", nBytes);
- exit(1);
- }
- return buffer[0];
-}
-
-static void verify_low(unsigned char bit, char *bitname)
-{
- int i;
- for (i = 0; i < 10; i++) {
- if (~get_status() & (1 << bit))
- return;
- usleep(10);
- }
- fprintf(stderr, "%s stuck high for >1ms\n", bitname);
-}
-
-static void verify_high(unsigned char bit, char *bitname)
-{
- int i;
- for (i = 0; i < 100; i++) {
- if (get_status() & (1 << bit))
- return;
- usleep(10);
- }
- fprintf(stderr, "%s stuck low for >1ms\n", bitname);
-}
-
-static void verify_sda_low()
-{
- verify_low(BIT_SDA, "SDA");
-}
-
-static void verify_sda_high()
-{
- verify_high(BIT_SDA, "SDA");
-}
-
-static void verify_scl_low()
-{
- verify_low(BIT_SCL, "SCL");
-}
-
-static void verify_scl_high()
-{
- verify_high(BIT_SCL, "SCL");
-}
-
-
-
-/*
- * Firmware: DDRB = ~b (with hardware pull-ups and PORTB = 0)
- * So to pull an output high (1), we turn it on, which sets it as input
- * -> pull-up works. for low (0): turn it off -> output -> pulled low
- */
-
-void set_sda(char value) {
- // discarded
- unsigned char buffer[8];
-
- usb_control_msg(handle, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_IN,
- (value ? PSCMD_ON : PSCMD_OFF), 0, BIT_SDA,
- (char *)buffer, sizeof(buffer), 5000);
-}
-
-void set_scl(char value) {
- // discarded
- unsigned char buffer[8];
-
- usb_control_msg(handle, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_IN,
- (value ? PSCMD_ON : PSCMD_OFF), 0, BIT_SCL,
- (char *)buffer, sizeof(buffer), 5000);
-}
+#include "i2c-util.h"
int main(int argc, char **argv)
{
-unsigned char buffer[8];
+ i2c_init();
- usb_init();
- if(usbOpenDevice(&handle, USBDEV_SHARED_VENDOR, "www.obdev.at", USBDEV_SHARED_PRODUCT, "PowerSwitch") != 0){
- fprintf(stderr, "Could not find USB device \"PowerSwitch\" with vid=0x%x pid=0x%x\n", USBDEV_SHARED_VENDOR, USBDEV_SHARED_PRODUCT);
- exit(1);
- }
-/* We have searched all devices on all busses for our USB device above. Now
- * try to open it and perform the vendor specific control operations for the
- * function requested by the user.
- */
-
char line[8];
signed char i;
short int number;
@@ -303,6 +77,6 @@ unsigned char buffer[8];
usleep(10);
verify_sda_high();
- usb_close(handle);
- return 0;
+ i2c_deinit();
+ return 0;
}
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-23 00:23:27 +0000