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Add a function to read and decode the status register. 

Very useful for debugging purposes. ;)
This commit is contained in:
Piotr Esden-Tempski 2018-08-18 15:45:37 -07:00
parent 20ef4efd8b
commit 868ac2d93f
1 changed files with 66 additions and 2 deletions
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68
iceprog/iceprog.c
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@ -391,15 +391,79 @@ static void flash_power_down()
flash_chip_select(false);
}
static uint8_t flash_read_status()
{
uint8_t data[2] = { FC_RSR1 };
flash_chip_select(true);
xfer_spi(data, 2);
flash_chip_select(false);
if(verbose) {
fprintf(stderr, "SR1: 0x%02X\n", data[1]);
fprintf(stderr, " - SPRL: %s\n",
((data[1] & (1 << 7)) == 0) ?
"unlocked" :
"locked");
fprintf(stderr, " - SPM: %s\n",
((data[1] & (1 << 6)) == 0) ?
"Byte/Page Prog Mode" :
"Sequential Prog Mode");
fprintf(stderr, " - EPE: %s\n",
((data[1] & (1 << 5)) == 0) ?
"Erase/Prog success" :
"Erase/Prog error");
fprintf(stderr, "- SPM: %s\n",
((data[1] & (1 << 4)) == 0) ?
"~WP asserted" :
"~WP deasserted");
fprintf(stderr, " - SWP: ");
switch((data[1] >> 2) & 0x3) {
case 0:
fprintf(stderr, "All sectors unprotected\n");
break;
case 1:
fprintf(stderr, "Some sectors protected\n");
break;
case 2:
fprintf(stderr, "Reserved (xxxx 10xx)\n");
break;
case 3:
fprintf(stderr, "All sectors protected\n");
break;
}
fprintf(stderr, " - WEL: %s\n",
((data[1] & (1 << 1)) == 0) ?
"Not write enabled" :
"Write enabled");
fprintf(stderr, " - ~RDY: %s\n",
((data[1] & (1 << 0)) == 0) ?
"Ready" :
"Busy");
}
usleep(1000);
return data[1];
}
static void flash_write_enable()
{
if (verbose)
fprintf(stderr, "write enable..\n");
if (verbose) {
fprintf(stderr, "status before enable:\n");
flash_read_status();
}
if (verbose) fprintf(stderr, "write enable..\n");
uint8_t data[1] = { FC_WE };
flash_chip_select(true);
xfer_spi(data, 1);
flash_chip_select(false);
if (verbose) {
fprintf(stderr, "status after enable:\n");
flash_read_status();
}
}
static void flash_bulk_erase()