static
BYTE send_cmd (
BYTE cmd, /* Command byte */
DWORD arg /* Argument */
)
{
BYTE n, res;
if (cmd & 0x80) { /* ACMD<n> is the command sequense of CMD55-CMD<n> */
cmd &= 0x7F;
res = send_cmd(CMD55, 0);
if (res > 1) return res;
}
#if AXI_SPI
XStatus Status = XSpi_SetSlaveSelect(&Spi, 0);
if(Status != XST_SUCCESS) {
xil_printf("Failure Slave Select 0\r\n");
xil_printf("Status = %d\r\n", Status);
}
rcvr_mmc();
Status = XSpi_SetSlaveSelect(&Spi, 1);
if(Status != XST_SUCCESS) {
xil_printf("Failure Slave Select 1\r\n");
}
rcvr_mmc();
#else
/* Select the card */
CS_H(); rcvr_mmc();
CS_L(); rcvr_mmc();
#endif
/* Send a command packet */
xmit_mmc(cmd); /* Start + Command index */
xmit_mmc((BYTE)(arg >> 24)); /* Argument[31..24] */
xmit_mmc((BYTE)(arg >> 16)); /* Argument[23..16] */
xmit_mmc((BYTE)(arg >> 8)); /* Argument[15..8] */
xmit_mmc((BYTE)arg); /* Argument[7..0] */
n = 0x01; /* Dummy CRC + Stop */
if (cmd == CMD0) n = 0x95; /* Valid CRC for CMD0(0) */
if (cmd == CMD8) n = 0x87; /* Valid CRC for CMD8(0x1AA) */
xmit_mmc(n);
/* Receive a command response */
n = 10; /* Wait for a valid response in timeout of 10 attempts */
do {
res = rcvr_mmc();
} while ((res & 0x80) && --n);
return res; /* Return with the response value */
}
void LD_reset(void) //芯片复位
{
RST_H();
delay_ms(2);
RST_L();
delay_ms(2);
RST_H();
delay_ms(2);
CS_L();
delay_ms(2);
CS_H();
delay_ms(2);
}
void ld3320_write_reg(uint8 data1,uint8 data2)
{
CS_L();
SPIS_L();
spi_send_byte(0x04);
spi_send_byte(data1);
spi_send_byte(data2);
CS_H();
}
uint8 ld3320_read_reg(uint8 reg_add)
{
uint8 i;
CS_L();
SPIS_L();
spi_send_byte(0x05);
spi_send_byte(reg_add);
i=spi_send_byte(0);
CS_H();
return(i);
}
static
BYTE send_cmd (
BYTE cmd, /* Command byte */
DWORD arg /* Argument */
)
{
BYTE n, res;
if (cmd & 0x80) { /* ACMD<n> is the command sequense of CMD55-CMD<n> */
cmd &= 0x7F;
res = send_cmd(CMD55, 0);
if (res > 1) return res;
}
/* Select the card */
CS_H(); rcvr_mmc();
CS_L(); rcvr_mmc();
/* Send a command packet */
XMIT_MMC(cmd); /* Start + Command index */
XMIT_MMC((BYTE)(arg >> 24)); /* Argument[31..24] */
XMIT_MMC((BYTE)(arg >> 16)); /* Argument[23..16] */
XMIT_MMC((BYTE)(arg >> 8)); /* Argument[15..8] */
XMIT_MMC((BYTE)arg); /* Argument[7..0] */
n = 0x01; /* Dummy CRC + Stop */
if (cmd == CMD0) n = 0x95; /* Valid CRC for CMD0(0) */
if (cmd == CMD8) n = 0x87; /* Valid CRC for CMD8(0x1AA) */
XMIT_MMC(n);
/* Receive a command response */
n = 10; /* Wait for a valid response in timeout of 10 attempts */
do {
res = rcvr_mmc();
} while ((res & 0x80) && --n);
return res; /* Return with the response value */
}
