/*****************************************************************************//*!
+FUNCTION----------------------------------------------------------------
* @function name: SPI0_Init
*
* @brief initialize SPI0 to master mode
*
* @param none
*
* @return none
*
* @ Pass/ Fail criteria: none
*****************************************************************************/
void SPI0_Init(void) {
unsigned char temp[4] = { 0 };
volatile char dummy;
CS_PIN_Init;
// SPI0 initial
//SYS_SOPT1_SPI0PS = 1; // SPI0 SPSCK0, MOSI0, MISO0, and SS0 are mapped on PTE0, PTE1, PTE2, and PTE3.
SPI0_C1_MSTR = 1; // master
SPI0_C1_CPOL = 0;
SPI0_C1_CPHA = 0;
SPI0_BR_SPR = 0b001; // device 2
SPI0_BR_SPPR = 0b000; // device 2 -> Baud = 20/4 =500khz
dummy = SPI0_D;
SPI0_C1_SPE = 1; // enabled
flash_read_id(temp);
}
int main(int argc, char **argv)
{
if (argc != 2 || (argv[1][0] == '-' && argv[1][1]) || !argv[1][0]) {
printf("Usage: %s <binfile> ... program <binfile> to IceZero flash\n", argv[0]);
printf(" %s - ... program stdin to IceZero flash\n", argv[0]);
printf(" %s . ... erase first sector of IceZero flash\n", argv[0]);
printf(" %s .. ... just restart the FPGA\n", argv[0]);
return 1;
}
wiringPiSetup();
pinMode(CFG_SS, OUTPUT);
pinMode(CFG_SCK, OUTPUT);
pinMode(CFG_SI, INPUT);
pinMode(CFG_SO, OUTPUT);
pinMode(CFG_RST, OUTPUT);
pinMode(CFG_DONE, INPUT);
digitalWrite(CFG_SS, HIGH);
digitalWrite(CFG_SCK, LOW);
digitalWrite(CFG_SO, LOW);
digitalWrite(CFG_RST, LOW);
if (strcmp(argv[1], ".."))
{
flash_power_up();
flash_read_id();
}
if (!strcmp(argv[1], "."))
{
char buffer[1024];
int i;
for (i = 0; i < (int)sizeof(buffer); i++)
buffer[0] = 0xff;
flash_wrsector(0, buffer, sizeof(buffer));
}
else
if (strcmp(argv[1], ".."))
{
int addr = 0, size = 0;
char buffer[64*1024];
FILE *f = strcmp(argv[1], "-") ? fopen(argv[1], "rb") : stdin;
if (f == NULL) {
printf("Failed to open %s: %s\n", argv[1], strerror(errno));
return 1;
}
do {
addr += size;
size = 0;
while (size < (int)sizeof(buffer)) {
int rc = fread(buffer+size, 1, sizeof(buffer)-size, f);
if (rc <= 0) break;
size += rc;
}
if (size > 0)
flash_wrsector(addr, buffer, size);
} while (size == sizeof(buffer));
}
digitalWrite(CFG_RST, LOW);
usleep(2000);
digitalWrite(CFG_RST, HIGH);
usleep(500000);
if (digitalRead(CFG_DONE) != HIGH) {
printf("Warning: cdone is low\n");
return 1;
}
printf("DONE.\n");
return 0;
}
