diff options
Diffstat (limited to 'libk8055/libk8055.c')
| -rw-r--r-- | libk8055/libk8055.c | 32 |
1 files changed, 13 insertions, 19 deletions
diff --git a/libk8055/libk8055.c b/libk8055/libk8055.c index fe885f2..557dc5e 100644 --- a/libk8055/libk8055.c +++ b/libk8055/libk8055.c @@ -146,19 +146,13 @@ static void init_usb(void) { } /* Actual read of data from the device endpoint, retry 3 times if not responding ok */ -static int ReadK8055Data(void) -{ - int read_status = 0, i = 0; - - if (curr_dev->dev_no == 0) return K8055_ERROR; - - for(i=0; i < READ_RETRY; i++) - { - read_status = usb_interrupt_read(curr_dev->device_handle, USB_INP_EP, (char *)curr_dev->data_in, PACKET_LEN, USB_TIMEOUT); - if ((read_status == PACKET_LEN) && (curr_dev->data_in[1] == curr_dev->dev_no )) return 0; - if (DEBUG) - fprintf(stderr, "Read retry\n"); - } +static int k8055_read( struct k8055_dev* dev ) { + if ( dev->dev_no==0 ) return K8055_ERROR; + for ( int i=0; i<READ_RETRY; i++ ) { + int read_status = usb_interrupt_read(dev->device_handle, USB_INP_EP, (char*)dev->data_in, PACKET_LEN, USB_TIMEOUT); + if ( (read_status == PACKET_LEN) && (dev->data_in[1] == dev->dev_no) ) return 0; + if ( DEBUG) fprintf(stderr, "Read retry\n"); + } return K8055_ERROR; } @@ -271,7 +265,7 @@ int OpenDevice(long BoardAddress) SetCurrentDevice(BoardAddress); memset(curr_dev->data_out,0,PACKET_LEN); /* Write cmd 0, read data */ WriteK8055Data(CMD_RESET); - if (ReadK8055Data() == 0) + if (k8055_read(curr_dev) == 0) return BoardAddress; /* This function should return board address */ else return K8055_ERROR; @@ -346,7 +340,7 @@ long ReadAnalogChannel(long Channel) { if (Channel == 1 || Channel == 2) { - if ( ReadK8055Data() == 0) + if ( k8055_read(curr_dev) == 0) { if (Channel == 2) return curr_dev->data_in[ANALOG_2_OFFSET]; @@ -362,7 +356,7 @@ long ReadAnalogChannel(long Channel) int ReadAllAnalog(long *data1, long *data2) { - if (ReadK8055Data() == 0) + if ( k8055_read(curr_dev) == 0) { *data1 = curr_dev->data_in[ANALOG_1_OFFSET]; *data2 = curr_dev->data_in[ANALOG_2_OFFSET]; @@ -490,7 +484,7 @@ long ReadAllDigital() { int return_data = 0; - if (ReadK8055Data() == 0) + if ( k8055_read(curr_dev) == 0) { return_data = ( ((curr_dev->data_in[0] >> 4) & 0x03) | /* Input 1 and 2 */ @@ -504,7 +498,7 @@ long ReadAllDigital() int ReadAllValues(long int *data1, long int * data2, long int * data3, long int * data4, long int * data5) { - if (ReadK8055Data() == 0) + if ( k8055_read(curr_dev) == 0) { *data1 = ( ((curr_dev->data_in[0] >> 4) & 0x03) | /* Input 1 and 2 */ @@ -545,7 +539,7 @@ long ReadCounter(long CounterNo) { if (CounterNo == 1 || CounterNo == 2) { - if (ReadK8055Data() == 0) + if ( k8055_read(curr_dev) == 0) { if (CounterNo == 2) return *((short int *)(&curr_dev->data_in[COUNTER_2_OFFSET])); |