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start working with DMA

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This commit is contained in:
Edward Emelianov
2025-09-18 23:54:01 +03:00
parent 3e701f147f
commit 934f4fbddd
9 changed files with 171 additions and 122 deletions
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35
F3:F303/I2C_scan/strfunc.c
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@@ -18,6 +18,16 @@
#include "strfunc.h"
// hex line number for hexdumps
static void u16s(uint16_t n, char *buf){
for(int j = 3; j > -1; --j){
register uint8_t q = n & 0xf;
n >>= 4;
if(q < 10) buf[j] = q + '0';
else buf[j] = q - 10 + 'a';
}
}
/**
* @brief hexdump - dump hex array by 16 bytes in string
* @param sendfun - function to send data
@@ -25,7 +35,7 @@
* @param len - length of `arr`
*/
void hexdump(int (*sendfun)(const char *s), uint8_t *arr, uint16_t len){
char buf[52], *bptr = buf;
char buf[64] = "0000 ", *bptr = &buf[6];
for(uint16_t l = 0; l < len; ++l, ++arr){
for(int16_t j = 1; j > -1; --j){
register uint8_t half = (*arr >> (4*j)) & 0x0f;
@@ -36,10 +46,11 @@ void hexdump(int (*sendfun)(const char *s), uint8_t *arr, uint16_t len){
*bptr++ = '\n';
*bptr = 0;
sendfun(buf);
bptr = buf;
u16s(l + 1, buf);
bptr = &buf[6];
}else *bptr++ = ' ';
}
if(bptr != buf){
if(bptr != &buf[6]){
*bptr++ = '\n';
*bptr = 0;
sendfun(buf);
@@ -48,24 +59,26 @@ void hexdump(int (*sendfun)(const char *s), uint8_t *arr, uint16_t len){
// dump uint16_t by 8 values in string
void hexdump16(int (*sendfun)(const char *s), uint16_t *arr, uint16_t len){
char buf[52], *bptr = buf;
char buf[64] = "0000 ", *bptr = &buf[6];
for(uint16_t l = 0; l < len; ++l, ++arr){
uint16_t val = *arr;
for(int16_t j = 3; j > -1; --j){
//uint16_t val = *arr;
u16s(*arr, bptr);
/*for(int16_t j = 3; j > -1; --j){
register uint8_t q = val & 0xf;
val >>= 4;
if(q < 10) bptr[j] = q + '0';
else bptr[j] = q - 10 + 'a';
}
}*/
bptr += 4;
if((l & 7) == 7){
*bptr++ = '\n';
*bptr = 0;
sendfun(buf);
bptr = buf;
u16s((l + 1)*2, buf); // number of byte, not word!
bptr = &buf[6];
}else *bptr++ = ' ';
}
if(bptr != buf){
if(bptr != &buf[6]){
*bptr++ = '\n';
*bptr = 0;
sendfun(buf);
@@ -142,12 +155,12 @@ const char *uhex2str(uint32_t val){
* @param buf - string
* @return - pointer to first character in `buf` > ' '
*/
const char *omit_spaces(const char *buf){
char *omit_spaces(const char *buf){
while(*buf){
if(*buf > ' ') break;
++buf;
}
return buf;
return (char*)buf;
}
/**