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https://github.com/slsdetectorgroup/slsDetectorPackage.git
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73 lines
2.1 KiB
C
Executable File
73 lines
2.1 KiB
C
Executable File
#ifndef COMMON_SERVER_FUNCTIONS_H
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#define COMMON_SERVER_FUNCTIONS_H
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#ifndef GOTTHARDD //gotthard already had bus_w etc defined in its firmware_funcs.c (not yet made with common files)
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#include "blackfin.h"
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#endif
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/* global variables */
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void serializeToSPI(u_int32_t addr, u_int32_t val, u_int32_t csmask, int numbitstosend, u_int32_t clkmask, u_int32_t digoutmask, int digofset) {
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#ifdef VERBOSE
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if (numbitstosend == 16)
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printf("Writing to SPI Register: 0x%04x\n",val);
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else
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printf("Writing to SPI Register: 0x%08x\n", val);
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#endif
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u_int32_t valw;
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SPIChipSelect (valw, addr, csmask);
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sendDataToSPI(valw, addr, val, numbitstosend, clkmask, digoutmask, digofset);
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SPIChipDeselect(valw, addr, csmask, clkmask);
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}
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void SPIChipSelect (u_int32_t& valw, u_int32_t addr, u_int32_t csmask) {
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// start point
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valw = 0xffffffff; // old board compatibility (not using specific bits)
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bus_w (addr, valw);
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// chip sel bar down
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valw &= ~csmask; /* todo with test: done a bit different, not with previous value */
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bus_w (addr, valw);
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}
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void SPIChipDeselect (u_int32_t& valw, u_int32_t addr, u_int32_t csmask, u_int32_t clkmask) {
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// chip sel bar up
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valw |= csmask; /* todo with test: not done for spi */
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bus_w (addr, valw);
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//clk down
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valw &= ~clkmask;
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bus_w (addr, valw);
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// stop point = start point of course
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valw = 0xffffffff; // old board compatibility (not using specific bits)
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bus_w (addr, valw);
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}
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void sendDataToSPI (u_int32_t& valw, u_int32_t addr, u_int32_t val, int numbitstosend, u_int32_t clkmask, u_int32_t digoutmask, int digofset) {
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int i = 0;
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for (i = 0; i < numbitstosend; ++i) {
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// clk down
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valw &= ~clkmask;
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bus_w (addr, valw);
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// write data (i)
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valw = ((valw & ~digoutmask) + // unset bit
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(((val >> (numbitstosend - 1 - i)) & 0x1) << digofset)); // each bit from val starting from msb
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bus_w (addr, valw);
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// clk up
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valw |= clkmask ;
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bus_w (addr, valw);
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}
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}
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#endif //COMMON_SERVER_FUNCTIONS_H
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