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);
}
static
void release_spi (void)
{
#if AXI_SPI
XStatus Status = XSpi_SetSlaveSelect(&Spi, 1);
if(Status != XST_SUCCESS) {
xil_printf("Failure Slave Select release_spi\r\n");
}
//DLY_US(1);
#else
CS_H();
rcvr_mmc();
#endif
}
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);
}
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;
}
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 */
}
void ld3320_spi_init(void)
{
SPI_InitTypeDef SPI_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
//spi端口配置
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI3 | RCC_APB2Periph_GPIOB,ENABLE); //使能SPI3外设时钟
GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable, ENABLE);
//P0/P1/P2
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_4 | GPIO_Pin_3;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOB,&GPIO_InitStructure);
//spis 片选 WR
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
CS_H();
//spi功能配置
SPI_Cmd(SPI3, DISABLE);
/* SPI3 配置 */
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex; //全双工
SPI_InitStructure.SPI_Mode = SPI_Mode_Master; //主模式
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; //8位
SPI_InitStructure.SPI_CPOL = SPI_CPOL_High; //时钟极性 空闲状态时，SCK保持低电平
SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge; //时钟相位 数据采样从第一个时钟边沿开始
SPI_InitStructure.SPI_NSS = SPI_NSS_Hard; //软件产生NSS
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2; //波特率控制 SYSCLK/128
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; //数据高位在前
SPI_InitStructure.SPI_CRCPolynomial = 7; //CRC多项式寄存器初始值为7
SPI_Init(SPI3, &SPI_InitStructure);
/* 使能SPI3 */
SPI_Cmd(SPI3, ENABLE);
}
static
void release_spi (void)
{
CS_H();
rcvr_mmc();
}
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;
}
