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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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12
src/ftdiJtagMPSSE.cpp
View File

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

2
src/ftdipp_mpsse.hpp
View File

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