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#include <stdbool.h>
#include <stdint.h>
#include "types.h"
#include "eeprom.h"
#include "can.h"
#include "signal.h"
#include "serial.h"
Status
serWriteCanId(U16 addr, const CanId *id) {
U8 buf[4u];
// Copy ID to buffer
if (id->isExt) { // extended
buf[0u] = (id->eid>>0u) & 0xFF;
buf[1u] = (id->eid>>8u) & 0xFF;
buf[2u] = (id->eid>>16u) & 0xFF;
buf[3u] = (id->eid>>24u) & 0x1F;
buf[3u] |= 0x80; // set EID flag in bit 31
} else { // standard
buf[0u] = (id->sid>>0u) & 0xFF;
buf[1u] = (id->sid>>8u) & 0x07;
buf[2u] = 0u;
buf[3u] = 0u; // clear EID flag in bit 32
}
return eepromWrite(addr, buf, sizeof(buf));
}
Status
serReadCanId(U16 addr, CanId *id) {
U8 buf[sizeof(U32)];
Status status;
// Read
status = eepromRead(addr, buf, sizeof(buf));
if (status != OK) {
return FAIL;
}
// Unpack
if (buf[3u] & 0x80) { // bit 31 is standard/extended flag
id->isExt = true; // extended
id->eid = ((U32)buf[0u] << 0u)
| ((U32)buf[1u] << 8u)
| ((U32)buf[2u] << 16u)
| (((U32)buf[3u] & 0x1F) << 24u);
} else {
id->isExt = false; // standard
id->sid = ((U16)buf[0u] << 0u)
| (((U16)buf[1u] & 0x07) << 8u);
}
return OK;
}
Status
serWriteSigFmt(EepromAddr addr, const SigFmt *sig) {
Status status;
U8 buf[3u];
// ID
status = serWriteCanId(addr, &sig->id);
if (status != OK) {
return status;
}
// Encoding
buf[0u] = sig->start;
buf[1u] = sig->size;
buf[2u] = (U8)((sig->order & 0x01) << 7u)
| ((sig->isSigned) ? 0x40 : 0x00);
return eepromWrite(addr+SER_CANID_SIZE, buf, sizeof(buf));
}
Status
serReadSigFmt(EepromAddr addr, SigFmt *sig) {
Status status;
U8 buf[3u];
// ID
status = serReadCanId(addr, &sig->id);
if (status != OK) {
return status;
}
// Encoding
status = eepromRead(addr+SER_CANID_SIZE, buf, sizeof(buf));
if (status != OK) {
return status;
}
sig->start = buf[0u];
sig->size = buf[1u];
sig->order = (buf[2u] & 0x80) ? BIG_ENDIAN : LITTLE_ENDIAN;
sig->isSigned = buf[2u] & 0x40;
return OK;
}
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