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OK, I2C read by DMA works

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This commit is contained in:
Edward Emelianov
2025-09-19 21:24:19 +03:00
parent 934f4fbddd
commit 080be6a1ec
8 changed files with 103 additions and 109 deletions
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26
F3:F303/I2C_scan/proto.c
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@@ -26,6 +26,7 @@
#define LOCBUFFSZ (32)
// local buffer for I2C data to send
static uint8_t locBuffer[LOCBUFFSZ];
static uint8_t I2Caddress = 0x33 << 1;
extern volatile uint32_t Tms;
static const char *OK = "OK\n";
@@ -33,6 +34,7 @@ static const char *helpstring =
"https://github.com/eddyem/stm32samples/tree/master/F3:F303/I2C_scan build#" BUILD_NUMBER " @ " BUILD_DATE "\n"
"i0..3 - setup I2C with speed 10k, 100k, 400k, 1M or 2M (experimental!)\n"
"B - switch to big-endian format for 16-bit registers\n"
"G - get busy state\n"
"Ia addr - set I2C address\n"
"Ig - dump content of I2Cbuf\n"
"Iw bytes - send bytes (hex/dec/oct/bin) to I2C\n"
@@ -59,7 +61,6 @@ TRUE_INLINE const char *setupI2C(char *buf){
return OK;
}
static uint8_t I2Caddress = 0;
TRUE_INLINE const char *saI2C(const char *buf){
uint32_t addr;
U("saI2C: '"); U(buf); U("'\n");
@@ -98,24 +99,24 @@ static void rdI2C(const char *buf, int is16, int dmaflag){
if(noreg){ // don't write register
if(dmaflag){
U("Try to read using DMA .. ");
if(!read_i2c_dma(I2Caddress, N)) U(erd);
if(!i2c_read_dma(I2Caddress, N)) U(erd);
else U(OK);
return;
}else{
USND("Simple read:");
if(!(b8 = read_i2c(I2Caddress, N))){
if(!(b8 = i2c_read(I2Caddress, N))){
U(erd);
return;
}
}
}else{
if(is16){
if(!(b16 = read_i2c_reg16(I2Caddress, reg, N, dmaflag))){
if(!(b16 = i2c_read_reg16(I2Caddress, reg, N, dmaflag))){
U(erd);
return;
}
}else{
if(!(b8 = read_i2c_reg(I2Caddress, reg, N, dmaflag))){
if(!(b8 = i2c_read_reg(I2Caddress, reg, N, dmaflag))){
U(erd);
return;
}
@@ -142,8 +143,8 @@ 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);
int result = isdma ? i2c_write_dma(I2Caddress, locBuffer, N) :
i2c_write(I2Caddress, locBuffer, N);
if(!result) return "Error writing I2C\n";
return OK;
}
@@ -185,12 +186,15 @@ const char *parse_cmd(char *buf){
switch(*buf){
case 'i': return setupI2C(NULL); // current settings
case 'B':
endianness(1);
return OK;
i2c_endianness(1);
return OK;
break;
case 'G':
U("I2Cbusy="); USB_putbyte('0' + i2c_busy()); newline();
break;
case 'L':
endianness(0);
return OK;
i2c_endianness(0);
return OK;
break;
case 'T':
U("T=");