/** Return version string from NAP configuration build.
*
* \param git_hash char [] that version string will be written to.
* \return Length of version string.
*/
u8 nap_conf_rd_version_string(char version_string[])
{
u8 count = 0;
char c;
do {
m25_read(NAP_FLASH_VERSION_STRING_ADDR + count, (u8 *)&c, 1);
version_string[count] = c;
count++;
if (c && !isprint((u8)c)) {
/* We have hit an unexpected character, this must not be an ASCII version
* string. Fall back to old Git Hash style version. */
strcpy(version_string, "OLD ");
for (count=0; count<20; count++) {
m25_read(NAP_FLASH_GIT_HASH_ADDR + count, (u8 *)&c, 1);
snprintf(&version_string[2*count + 4], 3, "%02x", c);
}
u8 unclean;
m25_read(NAP_FLASH_GIT_UNCLEAN_ADDR, &unclean, 1);
if (unclean) {
strcpy(&version_string[44], " (unclean)");
}
count = strlen(version_string);
/* Make sure we exit the loop. */
break;
}
} while (c);
return count;
}
/** Return git repository cleanliness status from NAP configuration build.
* Retrieves cleanliness status of HDL repository at the time FPGA
* configuration was built.
*
* \return 1 if repository was unclean, 0 if clean
*/
u8 nap_conf_rd_git_unclean(void)
{
u8 unclean;
m25_read(NAP_FLASH_GIT_UNCLEAN_ADDR, &unclean, 1);
return unclean;
}
/** Return Piksi hardware revision identifier.
*/
u32 nap_conf_rd_hw_rev()
{
u8 hw_rev_u8[4];
m25_read(NAP_FLASH_HW_REVISION_ADDR, hw_rev_u8, 4);
u32 hw_rev = (hw_rev_u8[0] << 24) |
(hw_rev_u8[1] << 16) |
(hw_rev_u8[2] << 8) |
(hw_rev_u8[3] << 0);
return hw_rev;
}
/** Return Piksi serial number from the configuration flash.
*/
s32 nap_conf_rd_serial_number()
{
u8 serial_num_u8[4];
m25_read(NAP_FLASH_SERIAL_NUMBER_ADDR, serial_num_u8, 4);
s32 serial_num = (serial_num_u8[0] << 24) |
(serial_num_u8[1] << 16) |
(serial_num_u8[2] << 8) |
(serial_num_u8[3] << 0);
return serial_num;
}
/** Get NAP configuration parameters from FPGA configuration flash.
* Gets information about the NAP configuration (number of code phase taps in
* the acquisition channel, number of tracking channels, etc).
*/
void nap_conf_rd_parameters(void)
{
/* Define parameters that need to be read from FPGA configuration flash.
* Pointers in the array should be in the same order they're stored in the
* configuration flash. */
u8 * nap_parameters[2] = {
&nap_acq_n_taps,
&nap_track_n_channels
};
/* Get parameters from FPGA configuration flash */
for (u8 i = 0; i < (sizeof(nap_parameters) / sizeof(nap_parameters[0])); i++)
m25_read(NAP_FLASH_PARAMS_ADDR + i, nap_parameters[i], 1);
}
void flash_read_callback(u8 buff[]) {
// Msg format: u32 addr, u32 len
u32 addr, len;
static char flash_data[16];
addr = *(u32 *)&buff[0];
len = *(u32 *)&buff[4];
printf("SPI Flash reading %d bytes from 0x%06X:\n", (int)len, (unsigned int)addr);
while (len) {
u8 chunk_len = 16;
if (len < 16) chunk_len = len;
m25_read(addr, chunk_len, (u8 *)flash_data);
printf("%08X: ", (unsigned int)addr);
for (u8 chunk_i = 0; chunk_i < chunk_len; chunk_i++)
printf("%02X ", flash_data[chunk_i]);
/*
printf(" ");
for (u8 chunk_i = 0; chunk_i < chunk_len; chunk_i++)
if (flash_data[chunk_i] >= 32)
printf("%c", flash_data[chunk_i]);
else
printf(".");
*/
printf("\n");
len -= chunk_len;
addr += chunk_len;
}
}
/** Return git commit hash from NAP configuration build.
* Retrieves commit hash of HDL repository at the time FPGA configuration was
* built.
*
* \param git_hash Array of u8 (length 20) in which git hash will be put.
*/
void nap_conf_rd_git_hash(u8 git_hash[])
{
m25_read(NAP_FLASH_GIT_HASH_ADDR, git_hash, 20);
}