DSTATUS disk_initialize (void)
{
BYTE n, cmd, ty, buf[4];
UINT tmr;
INIT_PORT();
CS_H();
skip_mmc(10); /* Dummy clocks */
ty = 0;
if (send_cmd(CMD0, 0) == 1) { /* Enter Idle state */
if (send_cmd(CMD8, 0x1AA) == 1) { /* SDv2 */
for (n = 0; n < 4; n++) buf[n] = rcvr_mmc(); /* Get trailing return value of R7 resp */
if (buf[2] == 0x01 && buf[3] == 0xAA) { /* The card can work at vdd range of 2.7-3.6V */
for (tmr = 1000; tmr; tmr--) { /* Wait for leaving idle state (ACMD41 with HCS bit) */
if (send_cmd(ACMD41, 1UL << 30) == 0) break;
DLY_US(1000);
}
if (tmr && send_cmd(CMD58, 0) == 0) { /* Check CCS bit in the OCR */
for (n = 0; n < 4; n++) buf[n] = rcvr_mmc();
ty = (buf[0] & 0x40) ? CT_SD2 | CT_BLOCK : CT_SD2; /* SDv2 (HC or SC) */
}
}
} else { /* SDv1 or MMCv3 */
if (send_cmd(ACMD41, 0) <= 1) {
ty = CT_SD1; cmd = ACMD41; /* SDv1 */
} else {
ty = CT_MMC; cmd = CMD1; /* MMCv3 */
}
for (tmr = 1000; tmr; tmr--) { /* Wait for leaving idle state */
if (send_cmd(cmd, 0) == 0) break;
DLY_US(1000);
}
if (!tmr || send_cmd(CMD16, 512) != 0) /* Set R/W block length to 512 */
ty = 0;
}
}
CardType = ty;
release_spi();
return ty ? 0 : STA_NOINIT;
}
int main(void)
{
UART_INIT();
INIT_PORT();
int state =0;
while(1){
if(button_pressed()){
//눌러지지 않은 상태애서 눌러진 상태로 바뀔 때마다 '*'전송
if(state == 0) UART_transmit('*');
state = 1; //버튼이 눌러진 상태로 표시
PORTB = 0x20; //LED 켜기
}
else {
state = 0; //버튼이 눌러지지 않은 상태로 표시
PORTB = 0x00; // LED끄기
}
}
}
int main(void)
{
UART_INIT(); // UART 통신 초기화
INIT_PORT(); // 포트 설정
int state = 0; // 현재 버튼의 상태
while(1){
if(PIND & 0x04){
state = 0; // 버튼이 눌러지지 않은 상태로 표시
PORTB = 0x00; // LED 끄기
}
else{
// 눌러지지 않은 상태에서 눌러진 상태로 바뀔 때마다 ‘*’ 문자 전송
if(state == 0) UART_transmit('*');
state = 1; // 버튼이 눌러진 상태로 표시
PORTB = 0x20; // LED 켜기
_delay_ms(100); // 디바운싱
}
}
}
static int __init lpptest_init (void)
{
if (register_chrdev(LPPTEST_CHAR_MAJOR, LPPTEST_DEVICE_NAME, &lpptest_dev_fops))
{
printk(KERN_NOTICE "Can't allocate major number %d for lpptest.\n",
LPPTEST_CHAR_MAJOR);
return -EAGAIN;
}
if (request_irq (LPPTEST_IRQ, lpptest_irq, 0, "lpptest", dev_id)) {
printk (KERN_WARNING "lpptest: irq %d in use. Unload parport module!\n", LPPTEST_IRQ);
unregister_chrdev(LPPTEST_CHAR_MAJOR, LPPTEST_DEVICE_NAME);
return -EAGAIN;
}
irq_desc[LPPTEST_IRQ].status |= IRQ_NODELAY;
irq_desc[LPPTEST_IRQ].action->flags |= IRQF_NODELAY | IRQF_DISABLED;
INIT_PORT();
ENABLE_IRQ();
return 0;
}
DSTATUS disk_initialize (void)
{
BYTE n, cmd, ty, buf[4];
UINT tmr;
#if AXI_SPI
/*
* Initialize the SPI driver so that it's ready to use,
* specify the device ID that is generated in xparameters.h.
*/
XStatus Status = XSpi_Initialize(&Spi, XPAR_SDCARD_SPI_DEVICE_ID);
if(Status != XST_SUCCESS) {\
xil_printf("Failure INIT\r\n");
return XST_FAILURE;
}
/*
* Set the SPI device as a master and in manual slave select mode such
* that the slave select signal does not toggle for every byte of a
* transfer, this must be done before the slave select is set.
*/
Status = XSpi_SetOptions(&Spi, XSP_MASTER_OPTION |
XSP_MANUAL_SSELECT_OPTION);
if(Status != XST_SUCCESS) {
xil_printf("Failure Options\r\n");
return XST_FAILURE;
}
Status = XSpi_SetSlaveSelect(&Spi, 1);
if(Status != XST_SUCCESS) {
xil_printf("Failure Slave Select\r\n");
return XST_FAILURE;
}
XSpi_Start(&Spi);
XSpi_IntrGlobalDisable(&Spi);
DLY_US(1);
#else
INIT_PORT();
CS_H();
#endif
skip_mmc(10); /* Dummy clocks */
ty = 0;
if (send_cmd(CMD0, 0) == 1) { /* Enter Idle state */
if (send_cmd(CMD8, 0x1AA) == 1) { /* SDv2 */
for (n = 0; n < 4; n++) buf[n] = rcvr_mmc(); /* Get trailing return value of R7 resp */
if (buf[2] == 0x01 && buf[3] == 0xAA) { /* The card can work at vdd range of 2.7-3.6V */
for (tmr = 1000; tmr; tmr--) { /* Wait for leaving idle state (ACMD41 with HCS bit) */
if (send_cmd(ACMD41, 1UL << 30) == 0) break;
DLY_US(1000);
}
if (tmr && send_cmd(CMD58, 0) == 0) { /* Check CCS bit in the OCR */
for (n = 0; n < 4; n++) buf[n] = rcvr_mmc();
ty = (buf[0] & 0x40) ? CT_SD2 | CT_BLOCK : CT_SD2; /* SDv2 (HC or SC) */
}
}
} else { /* SDv1 or MMCv3 */
if (send_cmd(ACMD41, 0) <= 1) {
ty = CT_SD1; cmd = ACMD41; /* SDv1 */
} else {
ty = CT_MMC; cmd = CMD1; /* MMCv3 */
}
for (tmr = 1000; tmr; tmr--) { /* Wait for leaving idle state */
if (send_cmd(cmd, 0) == 0) break;
DLY_US(1000);
}
if (!tmr || send_cmd(CMD16, 512) != 0) /* Set R/W block length to 512 */
ty = 0;
}
}
CardType = ty;
release_spi();
return ty ? 0 : STA_NOINIT;
}
