bool eeprom_read(uint32_t address, void* data, uint16_t length)
{
uint8_t control[3];
control[0] = (uint8_t)(0xa0 | 0 | 0); // clear read/write bit
control[1] = (uint8_t)(address >> 8);
control[2] = (uint8_t)address;
if (address > 0xffff){
control[0] |= 0x08;
}
iic_start(EEPROM_IIC_CHANNEL);
if (iic_write(EEPROM_IIC_CHANNEL, control, 3) == false){
iic_stop(EEPROM_IIC_CHANNEL);
return false;
}
iic_repeated_start(EEPROM_IIC_CHANNEL);
control[0] |= 1; // set read/write bit
if (iic_write(EEPROM_IIC_CHANNEL, control, 1) == false){
iic_stop(EEPROM_IIC_CHANNEL);
return false;
}
iic_read(EEPROM_IIC_CHANNEL, data, length);
iic_stop(EEPROM_IIC_CHANNEL);
return true;
}
unsigned int ads_read(unsigned int channel)
{
unsigned short int result=0;
/* unsigned char tmp[2]; */
if (channel > 4)
channel = 0;
/* Confige1115A(0); */
ads_confige(channel);
/* Pointregister(); */
ads_point_reg();
/* delay_ads(100); */
#if 1
start();
iic_write_m(0x91); //地址+读
result|=iic_read_m()<<8;
result|=iic_read_m();
/* result = ads_read_count(17); */
/* result = ads_read_count(16); */
stop();
#else
iic_read(0x91, tmp, 2);
result |= tmp[0] << 8;
result |= tmp[1];
#endif
return result;
}
int main(int argc, char *argv[])
{
int status;
/* Read buffer to hold the data */
char *buffer = (char *)malloc(EEPROMSIZE * sizeof(char));
char data[] = "THIS IS A TEST MESSAGE FOR THE I2C PROTOCOL COMMUNICATION WITH A EEPROM. IT WAS WRITTEN FOR A REDPITAYA MEASURMENT TOOL.";
size_t size = strlen(data);
/* Sample offset inside an eeprom */
int offset = 0x100;
/*
* Open the device.
*/
fd = open("/dev/i2c-0", O_RDWR);
if(fd < 0)
{
printf("Cannot open the IIC device\n");
return 1;
}
status = ioctl(fd, I2C_SLAVE_FORCE, EEPROM_ADDR);
if(status < 0)
{
printf("Unable to set the EEPROM address\n");
return -1;
}
/* Write to redpitaya eeprom */
status = iic_write((char *)data, offset, size);
if(status) {
fprintf(stderr, "Cannot Write to EEPROM\n");
close(fd);
return -1;
}
/* Read from redpitaya eeprom */
status = iic_read(buffer, EEPROM_ADDR, EEPROMSIZE);
if (status)
{
printf("Cannot Read from EEPROM \n");
close(fd);
return 1;
}
printf("eerprom test successfull.\n");
/* Release allocations */
close(fd);
free(buffer);
return 0;
}
void main()
{
TMOD=0x01;
TH0=(65536-45678)/256;
TL0=(65536-45678)%256;
ET0=1;
TR0=1;
EA=1;
dat=iic_read(1);
while(1)
{
digit(2,dat/100);
digit(3,dat%100/10);
digit(4,dat%10);
}
}
int main( void )
{
unsigned char buf[4];
alt_putstr("Boot\n");
// I2C Clock Setting
IOWR( IIC_0_BASE, 1, 42 ); // 100kHz (50,000kHz / 100kHz / 12 = 41.6...)
// IOWR( IIC_0_BASE, 1, 11 ); // 400kHz (50,000kHz / 400kHz / 12 = 10.4...)
buf[0] = 0;
iic_write( 0x1D, 1, buf );
iic_read( 0x1D, 1, buf );
alt_printf( "DEVID %x\n", buf[0] );
/* Event loop never exits. */
while( 1 ) {
;
}
return 0;
}
/* Read the EEPROM on the RPX-Lite board.
*/
void
rpx_cfg(bd_t *bd)
{
u_char eebuf[256], *cp;
/* Read the first 256 bytes of the EEPROM. I think this
* is really all there is, and I hope if it gets bigger the
* info we want is still up front.
*/
#if 1
iic_read(0xa8, eebuf, 0, 128);
iic_read(0xa8, &eebuf[128], 128, 128);
{
int i;
cp = (u_char *)0xfa000000;
for (i=0; i<256; i++)
*cp++ = eebuf[i];
}
/* We look for two things, the Ethernet address and the
* serial baud rate. The records are separated by
* newlines.
*/
cp = eebuf;
for (;;) {
if (*cp == 'E') {
cp++;
if (*cp == 'A') {
cp += 2;
rpx_eth(bd, cp);
}
}
if (*cp == 'S') {
cp++;
if (*cp == 'B') {
cp += 2;
rpx_brate(bd, cp);
}
}
if (*cp == 'D') {
cp++;
if (*cp == '1') {
cp += 2;
rpx_memsize(bd, cp);
}
}
if (*cp == 'H') {
cp++;
if (*cp == 'Z') {
cp += 2;
rpx_cpuspeed(bd, cp);
}
}
/* Scan to the end of the record.
*/
while ((*cp != '\n') && (*cp != 0xff))
cp++;
/* If the next character is a 0 or ff, we are done.
*/
cp++;
if ((*cp == 0) || (*cp == 0xff))
break;
}
bd->bi_memstart = 0;
#else
/* For boards without initialized EEPROM.
*/
bd->bi_memstart = 0;
bd->bi_memsize = (8 * 1024 * 1024);
bd->bi_intfreq = 48;
bd->bi_busfreq = 48;
bd->bi_baudrate = 9600;
#endif
}
static u8 gsl_read_interface(u8 reg,u8 *buf,u16 num)
{
iic_read(reg,buf,num);
return 1;
}
