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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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93
F3:F303/I2C_scan/proto.c
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@@ -36,17 +36,16 @@ static const char *helpstring =
"Ia addr - set I2C address\n"
"Ig - dump content of I2Cbuf\n"
"Iw bytes - send bytes (hex/dec/oct/bin) to I2C\n"
"IW bytes - the same over DMA\n"
"Ir reg n - read n bytes from I2C reg\n"
"I2 reg16 n - read n words from 16-bit register\n"
"In n - just read n bytes\n"
"IN n - the same but with DMA\n"
"Is - scan I2C bus\n"
"-- note: all rw commands for 'I' could be started from 'D', meaning DMA operations --\n"
"L - switch to little-endian (default) format for 16-bit registers\n"
"T - print current Tms\n"
;
TRUE_INLINE const char *setupI2C(const char *buf){
TRUE_INLINE const char *setupI2C(char *buf){
if(!buf || !*buf){
U("Current speed: "); USB_putbyte('0' + i2c_curspeed); newline();
return NULL;
@@ -72,16 +71,13 @@ TRUE_INLINE const char *saI2C(const char *buf){
U("I2Caddr="); USND(uhex2str(addr));
return OK;
}
static void rdI2C(const char *buf, int is16){
static void rdI2C(const char *buf, int is16, int dmaflag){
uint32_t N = 0;
int noreg = 0; // write register (==1 - just read, ==2 - -//- using DMA)
int noreg = 0; // ==1 - just read (without sending regno)
const char *nxt = NULL;
if(*buf == 'n'){
++buf;
noreg = 1;
}else if(*buf == 'N'){
++buf;
noreg = 2;
}else{
nxt = getnum(buf, &N);
if(!nxt || buf == nxt || N > 0xffff || (!is16 && N > 0xff)){
@@ -92,7 +88,7 @@ static void rdI2C(const char *buf, int is16){
}
uint16_t reg = N;
nxt = getnum(buf, &N);
uint32_t maxn = (is16) ? I2C_BUFSIZE : I2C_BUFSIZE / 2;
uint32_t maxn = (is16) ? I2C_BUFSIZE / 2 : I2C_BUFSIZE;
if(!nxt || buf == nxt || N > maxn){
USND("Bad length");
return;
@@ -100,32 +96,32 @@ static void rdI2C(const char *buf, int is16){
const char *erd = "Error reading I2C\n";
uint8_t *b8 = NULL; uint16_t *b16 = NULL;
if(noreg){ // don't write register
if(noreg == 1){
if(dmaflag){
U("Try to read using DMA .. ");
if(!read_i2c_dma(I2Caddress, N)) U(erd);
else U(OK);
return;
}else{
USND("Simple read:");
if(!(b8 = read_i2c(I2Caddress, N))){
U(erd);
return;
}
}else{
U("Try to read using DMA .. ");
if(!read_i2c_dma(I2Caddress, N)) U(erd);
else U(OK);
return;
}
}else{
if(is16){
if(!(b16 = read_i2c_reg16(I2Caddress, reg, N))){
if(!(b16 = read_i2c_reg16(I2Caddress, reg, N, dmaflag))){
U(erd);
return;
}
}else{
if(!(b8 = read_i2c_reg(I2Caddress, reg, N))){
if(!(b8 = read_i2c_reg(I2Caddress, reg, N, dmaflag))){
U(erd);
return;
}
}
}
if(N == 0){ U(OK); return; }
if(N == 0 || dmaflag){ U(OK); return; }
if(!noreg){U("Register "); U(uhex2str(reg)); U(":\n");}
if(is16) hexdump16(USB_sendstr, b16, N);
else hexdump(USB_sendstr, b8, N);
@@ -145,41 +141,46 @@ TRUE_INLINE uint16_t readNnumbers(const char *buf){
}
static const char *wrI2C(const char *buf, int isdma){
uint16_t N = readNnumbers(buf);
if(N == 0) return "Enter at least one number\n";
int result = isdma ? write_i2c_dma(I2Caddress, locBuffer, N) :
write_i2c(I2Caddress, locBuffer, N);
if(!result) return "Error writing I2C\n";
return OK;
}
const char *parse_cmd(const char *buf){
const char *parse_cmd(char *buf){
if(!buf || !*buf) return NULL;
if(buf[1]) switch(*buf){ // "long" commands
case 'i':
return setupI2C(buf + 1);
break;
case 'I':
buf = omit_spaces(buf + 1);
switch(*buf){
case 'a': return saI2C(buf + 1);
case 'r':
rdI2C(buf + 1, 0); return NULL;
case '2':
rdI2C(buf + 1, 1); return NULL;
case 'n':
case 'N':
rdI2C(buf, 0); return NULL;
case 'w': return wrI2C(buf + 1, 0);
case 'W': return wrI2C(buf + 1, 1);
case 's':
i2c_init_scan_mode(); return "Start scan\n";
case 'g':
i2c_bufdudump(); return NULL;
default:
return "Wrong I2C command, read help!\n";
}
break;
default:
return("Wrong command, try '?' for help\n");
int dmaflag = 0;
if(buf[1]){
if(*buf == 'D'){
dmaflag = 1; *buf = 'I'; // parse as for normal, but with DMA flag
}
switch(*buf){ // "long" commands
case 'i':
return setupI2C(buf + 1);
break;
case 'I':
buf = omit_spaces(buf + 1);
switch(*buf){
case 'a': return saI2C(buf + 1);
case 'r':
rdI2C(buf + 1, 0, dmaflag); return NULL;
case '2':
rdI2C(buf + 1, 1, dmaflag); return NULL;
case 'n':
rdI2C(buf, 0, dmaflag); return NULL;
case 'w': return wrI2C(buf + 1, dmaflag);
case 's':
i2c_init_scan_mode(); return "Start scan\n";
case 'g':
i2c_bufdudump(); return NULL;
default:
return "Wrong I2C command, read help!\n";
}
break;
default:
return("Wrong command, try '?' for help\n");
}
}
switch(*buf){
case 'i': return setupI2C(NULL); // current settings