5363ec3672
Had to do it all at once due to name conflicts with API exposed in libopencm3. Quite invasive patch! Also precipitated an LED API...
115 lines
3.5 KiB
C
115 lines
3.5 KiB
C
/*******************************************************/
|
|
/* file: ports.c */
|
|
/* abstract: This file contains the routines to */
|
|
/* output values on the JTAG ports, to read */
|
|
/* the TDO bit, and to read a byte of data */
|
|
/* from the prom */
|
|
/* Revisions: */
|
|
/* 12/01/2008: Same code as before (original v5.01). */
|
|
/* Updated comments to clarify instructions.*/
|
|
/* Add print in setPort for xapp058_example.exe.*/
|
|
/*******************************************************/
|
|
#include "ports.h"
|
|
|
|
#include "hackrf_core.h"
|
|
#include "cpld_jtag.h"
|
|
|
|
#include "gpio.h"
|
|
|
|
void delay_jtag(uint32_t duration)
|
|
{
|
|
#define DIVISOR (1024)
|
|
#define MIN_NOP (8)
|
|
|
|
uint32_t i;
|
|
uint32_t delay_nop;
|
|
|
|
/* @204Mhz duration of about 400ns for delay_nop=20 */
|
|
if(duration < DIVISOR)
|
|
{
|
|
delay_nop = MIN_NOP;
|
|
}else
|
|
{
|
|
delay_nop = (duration / DIVISOR) + MIN_NOP;
|
|
}
|
|
|
|
for (i = 0; i < delay_nop; i++)
|
|
__asm__("nop");
|
|
}
|
|
|
|
/* setPort: Implement to set the named JTAG signal (p) to the new value (v).*/
|
|
/* if in debugging mode, then just set the variables */
|
|
void setPort(jtag_gpio_t* const gpio, short p, short val)
|
|
{
|
|
if (p==TMS) {
|
|
if (val)
|
|
gpio_set(gpio->gpio_tms);
|
|
else
|
|
gpio_clear(gpio->gpio_tms);
|
|
} if (p==TDI) {
|
|
if (val)
|
|
gpio_set(gpio->gpio_tdi);
|
|
else
|
|
gpio_clear(gpio->gpio_tdi);
|
|
} if (p==TCK) {
|
|
if (val)
|
|
gpio_set(gpio->gpio_tck);
|
|
else
|
|
gpio_clear(gpio->gpio_tck);
|
|
}
|
|
|
|
/* conservative delay */
|
|
delay_jtag(20000);
|
|
}
|
|
|
|
|
|
/* toggle tck LH. No need to modify this code. It is output via setPort. */
|
|
void pulseClock(jtag_gpio_t* const gpio)
|
|
{
|
|
setPort(gpio, TCK,0); /* set the TCK port to low */
|
|
delay_jtag(200);
|
|
setPort(gpio, TCK,1); /* set the TCK port to high */
|
|
delay_jtag(200);
|
|
}
|
|
|
|
|
|
/* readByte: Implement to source the next byte from your XSVF file location */
|
|
/* read in a byte of data from the prom */
|
|
void readByte(unsigned char *data)
|
|
{
|
|
*data = cpld_jtag_get_next_byte();
|
|
}
|
|
|
|
/* readTDOBit: Implement to return the current value of the JTAG TDO signal.*/
|
|
/* read the TDO bit from port */
|
|
unsigned char readTDOBit(jtag_gpio_t* const gpio)
|
|
{
|
|
delay_jtag(2000);
|
|
return gpio_read(gpio->gpio_tdo);;
|
|
}
|
|
|
|
/* waitTime: Implement as follows: */
|
|
/* REQUIRED: This function must consume/wait at least the specified number */
|
|
/* of microsec, interpreting microsec as a number of microseconds.*/
|
|
/* REQUIRED FOR SPARTAN/VIRTEX FPGAs and indirect flash programming: */
|
|
/* This function must pulse TCK for at least microsec times, */
|
|
/* interpreting microsec as an integer value. */
|
|
/* RECOMMENDED IMPLEMENTATION: Pulse TCK at least microsec times AND */
|
|
/* continue pulsing TCK until the microsec wait */
|
|
/* requirement is also satisfied. */
|
|
void waitTime(jtag_gpio_t* const gpio, long microsec)
|
|
{
|
|
static long tckCyclesPerMicrosec = 1; /* must be at least 1 */
|
|
long tckCycles = microsec * tckCyclesPerMicrosec;
|
|
long i;
|
|
|
|
/* This implementation is highly recommended!!! */
|
|
/* This implementation requires you to tune the tckCyclesPerMicrosec
|
|
variable (above) to match the performance of your embedded system
|
|
in order to satisfy the microsec wait time requirement. */
|
|
for ( i = 0; i < tckCycles; ++i )
|
|
{
|
|
pulseClock(gpio);
|
|
}
|
|
}
|