thermocouple/firmware/masterchip/usb.c

#include "main.h"

usbMsgLen_t usbFunctionSetup(uchar data[8]) {
  usbRequest_t    *rq = (void *)data;
  static uchar    dataBuffer[4];

  if(rq->bRequest == 1) {
    dataBuffer[0] = (thermoData [0] & 0xff00)>>8;
    dataBuffer[1] = thermoData [0] & 0x00ff;
    dataBuffer[2] = (thermoData [1] & 0xff00)>>8;
    dataBuffer[3] = thermoData [1] & 0x00ff;
    usbMsgPtr = dataBuffer;
    return 4;
  } else if(rq->bRequest == 2) {
    dataBuffer[0] = (thermoData [2] & 0xff00)>>8;
    dataBuffer[1] = thermoData [2] & 0x00ff;
    dataBuffer[2] = (thermoData [3] & 0xff00)>>8;
    dataBuffer[3] = thermoData [3] & 0x00ff;
    usbMsgPtr = dataBuffer;
    return 4;
  } else {
    uint8_t opcode = (rq->bRequest & 0xff00)>>8;
    uint8_t addr = (rq->wValue & 0xff00)>>8;
    uint8_t valH = rq->wIndex & 0x00ff;
    uint8_t valL = (rq->wIndex & 0xff00)>>8;

    // uint16_t reply = do_spi_stuff(opcode, addr, valH, valL);
    dataBuffer[0] = (reply & 0xff00)>>8;
    dataBuffer[1] =  reply & 0x00ff;
    dataBuffer[2] = 0x0000;
    dataBuffer[3] = 0x0000;
    usbMsgPtr = dataBuffer;
    return 4;
    
  }

  return 0;
}