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Added: Mettler Toledo

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Fixed: Skip first result
Added: Set exponent
This commit is contained in:
Dmitriy Kozmenko 2013-09-30 13:59:58 -04:00
parent 7a6ac78c5f
commit 8246022ddb
3 changed files with 24 additions and 7 deletions
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1
50-usb-scale.rules
View File

@ -1,3 +1,4 @@
SUBSYSTEM=="usb", ATTR{idVendor}=="1446", ATTR{idProduct}=="6a73", MODE="0776"
SUBSYSTEM=="usb", ATTR{idVendor}=="7b7c", ATTR{idProduct}=="0100", MODE="0776"
SUBSYSTEM=="usb", ATTR{idVendor}=="2474", ATTR{idProduct}=="0550", MODE="0776"
SUBSYSTEM=="usb", ATTR{idVendor}=="0eb8", ATTR{idProduct}=="f000", MODE="0776"

11
scales.h
View File

@ -12,7 +12,12 @@
//
// **NSCALES** should be kept updated with the length of the list.
//
#define NSCALES 3
#define NSCALES 4
//
// What is the number of the weighing result to show, as the first result may be incorrect (from the previous weighing)
//
#define WEIGH_COUNT 2
//
// Scales
@ -24,5 +29,7 @@ uint16_t scales[NSCALES][2] = {\
// USPS (Elane) PS311 "XM Elane Elane UParcel 30lb"
{0x7b7c, 0x0100},
// Stamps.com Stainless Steel 5 lb. Digital Scale
{0x2474, 0x0550}
{0x2474, 0x0550},
// Mettler Toledo
{0x0eb8, 0xf000}
};

19
usbscale.c
View File

@ -94,6 +94,8 @@ int main(void)
libusb_device* dev;
libusb_device_handle* handle;
int weigh_count = WEIGH_COUNT -1;
//
// We first try to init libusb.
//
@ -213,9 +215,12 @@ int main(void)
printf("%x\n", data[i]);
}
#endif
scale_result = print_scale_data(data);
if(scale_result != 1)
break;
if (weigh_count < 1) {
scale_result = print_scale_data(data);
if(scale_result != 1)
break;
}
weigh_count--;
}
else {
fprintf(stderr, "Error in USB transfer\n");
@ -275,13 +280,17 @@ static int print_scale_data(unsigned char* dat) {
double weight = (double)(dat[4] + (dat[5] << 8)) / 10;
if(expt != 255 && expt != 0) {
weight = pow(weight, expt);
if (expt > 127) {
weight = weight * pow(10, expt-255);
} else {
weight = pow(weight, expt);
}
}
//
// The scale's first byte, its "report", is always 3.
//
if(report != 0x03) {
if(report != 0x03 && report != 0x04) {
fprintf(stderr, "Error reading scale data\n");
return -1;
}