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fix I2C scan

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This commit is contained in:
Edward Emelianov 2021-02-19 00:44:39 +03:00
parent 0db802b031
commit 8bbc858de4
4 changed files with 31 additions and 8 deletions
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BIN
F1-nolib/I2Cscan/I2Cscan.bin
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5
F1-nolib/I2Cscan/main.c
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@ -80,8 +80,9 @@ int main(void){
int ok = scan_next_addr(&addr);
if(addr == I2C_ADDREND) USB_send("Scan ends\n");
else if(ok){
USB_send(u2str(addr));
USB_send(" - found device\n");
USB_send(u2hexstr(addr));
USB_send(" ("); USB_send(u2str(addr));
USB_send(") - found device\n");
}
}
char *txt, *ans;

33
F1-nolib/I2Cscan/proto.c
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@ -153,17 +153,17 @@ char *getnum(const char *txt, uint32_t *N){
return nxt;
}
static void displaydata(uint8_t *data, int N){
static void displaydata(uint8_t *data, int start, int N){
if(N == 0){
USB_send("Done\n");
return;
}
USB_send("Got: ");
USB_send("Got:\naddr\tval(x)\tval(d)\n");
for(int i = 0; i < N; ++i){
USB_send(u2str(data[i]));
USB_send(" ");
USB_send(u2hexstr(i+start)); USB_send("\t");
USB_send(u2hexstr(data[i])); USB_send("\t");
USB_send(u2str(data[i])); USB_send("\n");
}
USB_send("\n");
}
const char* helpmsg =
@ -208,7 +208,7 @@ const char *parse_cmd(const char *buf){
n = Num;
if(ptr != getnum(ptr, &Num)){
if(Num > 128) return "Not more than 128 bytes\n";
if(read_reg(n, data, Num)) displaydata(data, Num);
if(read_reg(n, data, Num)) displaydata(data, n, Num);
else return "Error\n";
}else return "Need data amount to read\n";
}else return "Need register address\n";
@ -258,3 +258,24 @@ char *i2str(int32_t i){
}else val = i;
return _2str(val, minus);
}
char *u2hexstr(uint32_t val){
static char strbuf[11] = "0x";
char *sptr = strbuf + 2;
uint8_t *ptr = (uint8_t*)&val + 3;
int8_t i, j, z=1;
for(i = 0; i < 4; ++i, --ptr){
if(*ptr == 0){ // omit leading zeros
if(i == 3) z = 0;
if(z) continue;
}
else z = 0;
for(j = 1; j > -1; --j){
uint8_t half = (*ptr >> (4*j)) & 0x0f;
if(half < 10) *sptr++ = half + '0';
else *sptr++ = half - 10 + 'a';
}
}
*sptr = 0;
return strbuf;
}

1
F1-nolib/I2Cscan/proto.h
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@ -26,5 +26,6 @@ char *omit_spaces(const char *buf);
char *getnum(const char *buf, uint32_t *N);
char *u2str(uint32_t val);
char *i2str(int32_t val);
char *u2hexstr(uint32_t val);
#endif // PROTO_H__