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xilinx: use shiftIR with val when it's possible

This commit is contained in:
Gwenhael Goavec-Merou 2019-10-05 18:12:33 +02:00
parent 1afeb22478
commit 9391b7840d
1 changed files with 4 additions and 8 deletions
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12
xilinx.cpp
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@ -43,10 +43,9 @@ void Xilinx::reset()
int Xilinx::idCode()
{
unsigned char tx_data = IDCODE;
unsigned char rx_data[4];
_jtag->go_test_logic_reset();
_jtag->shiftIR(&tx_data, NULL, 6);
_jtag->shiftIR(IDCODE, 6);
_jtag->shiftDR(NULL, rx_data, 32);
return ((rx_data[0] & 0x000000ff) |
((rx_data[1] << 8) & 0x0000ff00) |
@ -78,8 +77,7 @@ void Xilinx::program(unsigned int offset)
* TCK five times. This ensures starting in X 1 5
* the TLR (Test-Logic-Reset) state.
*/
tx_buf = JPROGRAM;
_jtag->shiftIR(&tx_buf, NULL, 6/*, FtdiJtag::TEST_LOGIC_RESET*/);
_jtag->shiftIR(JPROGRAM, 6);
/* test */
tx_buf = BYPASS;
do {
@ -97,8 +95,7 @@ void Xilinx::program(unsigned int offset)
* exiting SHIFT-IR, as defined in the 0 1 1
* IEEE standard.
*/
tx_buf = CFG_IN;
_jtag->shiftIR(&tx_buf, NULL, 6);
_jtag->shiftIR(CFG_IN, 6);
/*
* 11: Enter the SELECT-DR state. X 1 2
*/
@ -133,8 +130,7 @@ void Xilinx::program(unsigned int offset)
* 20: Load the last bit of the JSTART instruction. 0 1 1
* 21: Move to the UPDATE-IR state. X 1 1
*/
tx_buf = JSTART;
_jtag->shiftIR(&tx_buf, NULL, 6, FtdiJtag::UPDATE_IR);
_jtag->shiftIR(JSTART, 6, FtdiJtag::UPDATE_IR);
/*
* 22: Move to the RTI state and clock the
* startup sequence by applying a minimum X 0 2000