Posted on January 29, 2016 at 23:00
Which file is for user_diskinitialize() ?
I can't find it....
It's only abstraction not a complete user_diskinitialize()....
Low level one with :
Stat = STA_NOINIT;
DSTATUS stat = RES_OK;
BYTE n, cmd, ty, ocr[4];
//;
if (pdrv) return STA_NOINIT; /* Supports only single drive */
power_off(); /* Turn off the socket power to reset the card */
if (stat & STA_NODISK) return stat; /* No card in the socket */;
power_on(); /* Turn on the socket power */
FCLK_SLOW();
for (n = 10; n; n--) xchg_spi(0xFF); /* 80 dummy clocks */
ty = 0;
if (send_cmd(CMD0, 0) == 1) { /* Enter Idle state */
Timer1 = 100; /* Initialization timeout of 1000 msec */
if (send_cmd(CMD8, 0x1AA) == 1) { /* SDv2? */
for (n = 0; n < 4; n++) ocr[n] = xchg_spi(0xFF); /* Get trailing return value of R7 resp */
if (ocr[2] == 0x01 && ocr[3] == 0xAA) { /* The card can work at vdd range of 2.7-3.6V */
while (Timer1 && send_cmd(ACMD41, 1UL << 30)); /* Wait for leaving idle state (ACMD41 with HCS bit) */
if (Timer1 && send_cmd(CMD58, 0) == 0) { /* Check CCS bit in the OCR */
for (n = 0; n < 4; n++) ocr[n] = xchg_spi(0xFF);
ty = (ocr[0] & 0x40) ? CT_SD2 | CT_BLOCK : CT_SD2; /* SDv2 */
}
}
} else { /* SDv1 or MMCv3 */
if (send_cmd(ACMD41, 0) <= 1) {
ty = CT_SD1; cmd = ACMD41; /* SDv1 */
} else {
ty = CT_MMC; cmd = CMD1; /* MMCv3 */
}
while (Timer1 && send_cmd(cmd, 0)); /* Wait for leaving idle state */
if (!Timer1 || send_cmd(CMD16, 512) != 0) /* Set R/W block length to 512 */
ty = 0;
}
}
CardType = ty;
deselect();
if (ty) { /* Initialization succeded */
stat &= ~STA_NOINIT; /* Clear STA_NOINIT */
FCLK_FAST();
HAL_UART_Transmit(&huart1, ''USER INITIALIZE SUCCEDED!
'', 100, 1000);
} else { /* Initialization failed */
power_off();
}
HAL_UART_Transmit(&huart1, ''USER INITIALIZE FINISHED!
'', 100, 1000);
Thanks
