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usbBlaster: init: flush FT245 buffer

This commit is contained in:
Gwenhael Goavec-Merou 2020-09-06 11:01:41 +02:00
parent f587d7afde
commit 3bfd63b987
2 changed files with 13 additions and 2 deletions
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13
src/usbBlaster.cpp
View File

@ -50,7 +50,7 @@ using namespace std;
UsbBlaster::UsbBlaster(bool verbose):
_verbose(verbose), _nb_bit(0),
_curr_tms(0), _buffer_size(64)
_curr_tms(0), _buffer_size(4096)
{
init_internal();
}
@ -100,6 +100,17 @@ void UsbBlaster::init_internal()
_tdi_pin = (1 << 4);
_in_buf = (unsigned char *)malloc(sizeof(unsigned char) * _buffer_size);
/* Force flush internal FT245 internal buffer */
uint8_t val = DEFAULT | DO_WRITE | DO_BITBB | _tms_pin;
for (_nb_bit = 0; _nb_bit < _buffer_size; _nb_bit += 2) {
_in_buf[_nb_bit ] = val;
_in_buf[_nb_bit + 1] = val | _tck_pin;
}
ftdi_write_data(_ftdi, _in_buf, _nb_bit);
_nb_bit = 0;
memset(_in_buf, 0, _buffer_size);
}

2
src/usbBlaster.hpp
View File

@ -89,6 +89,6 @@ class UsbBlaster : public JtagInterface {
uint8_t _tdi_pin; /*!< tdi pin: 1 << pin id */
int _nb_bit;
uint8_t _curr_tms;
uint8_t _buffer_size;
uint16_t _buffer_size;
};
#endif