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ftdiJtagMPSSE: don't flush/write everytime

This commit is contained in:
Gwenhael Goavec-Merou 2020-10-09 21:30:45 +02:00
parent 23c9733a6d
commit adb6efca39
2 changed files with 7 additions and 9 deletions
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14
src/ftdiJtagMPSSE.cpp
View File

@ -139,7 +139,8 @@ int FtdiJtagMPSSE::writeTMS(uint8_t *tms, int len, bool flush_buffer)
}
xfer -= bit_to_send;
}
mpsse_write();
if (flush_buffer)
mpsse_write();
if (_ch552WA) {
uint8_t c[len/8+1];
ftdi_read_data(_ftdi, c, len/8+1);
@ -166,9 +167,6 @@ int FtdiJtagMPSSE::toggleClk(uint8_t tms, uint8_t tdi, uint32_t clk_len)
buf[1] = ((len / 8) ) & 0xff;
buf[2] = ((len / 8) >> 8) & 0xff;
mpsse_store(buf, 3);
ret = mpsse_write();
if (ret < 0)
return ret;
len %= 8;
}
@ -176,16 +174,13 @@ int FtdiJtagMPSSE::toggleClk(uint8_t tms, uint8_t tdi, uint32_t clk_len)
buf[0] = 0x8E;
buf[1] = len - 1;
mpsse_store(buf, 2);
ret = mpsse_write();
if (ret < 0)
return ret;
}
ret = clk_len;
} else {
int byteLen = (len+7)/8;
uint8_t buf_tms[byteLen];
memset(buf_tms, (tms) ? 0xff : 0x00, byteLen);
ret = writeTMS(buf_tms, len, true);
ret = writeTMS(buf_tms, len, false);
}
return ret;
@ -221,6 +216,9 @@ int FtdiJtagMPSSE::writeTDI(uint8_t *tdi, uint8_t *tdo, uint32_t len, bool last)
display("%s len : %d %d %d %d\n", __func__, len, real_len, nb_byte,
nb_bit);
if ((nb_byte + _num + 3) > _buffer_size)
mpsse_write();
if ((nb_byte * 8) + nb_bit != real_len) {
printf("pas cool\n");
throw std::exception();

2
src/ftdipp_mpsse.hpp
View File

@ -50,8 +50,8 @@ class FTDIpp_MPSSE {
int _clkHZ;
struct ftdi_context *_ftdi;
int _buffer_size;
private:
int _num;
private:
unsigned char *_buffer;
};