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;
}
void ads_point_reg(void)
{
unsigned char Initdata[4]={0};
/* address and write command */
Initdata[0] =0x90;
/* point register */
Initdata[1] =0x00;
#if 1
unsigned char i=0;
SDA_OUT;
start();
for(i=0;i<2;i++)
{
iic_write_m(Initdata[i]);
}
/* IIC_write(Initdata, 0, 16); */
stop();
#else
iic_write(Initdata[0], &Initdata[1], 1);
#endif
}
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 write_eerom(u16 addr,u8 dat)
{
u8 iic_addr=0,page=0;
iic_addr=EEPROM_Addr_Align(addr);
page =EEPROM_Addr_to_Page(addr);
iic_write((0xa0|page),iic_addr,&dat,1);
delay_10ms(2);
}
static bool eeprom_page_write(uint32_t address, void* data, uint8_t length)
{
uint8_t control[3];
uint16_t timeout = WRITE_TIMEOUT;
control[0] = (uint8_t)(0xa0 | 0 | 0);
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;
}
if (iic_write(EEPROM_IIC_CHANNEL, data, length) == false){
iic_stop(EEPROM_IIC_CHANNEL);
return false;
}
iic_stop(EEPROM_IIC_CHANNEL);
while (timeout--){
iic_start(EEPROM_IIC_CHANNEL);
if (iic_write(EEPROM_IIC_CHANNEL, control, 1)){
iic_stop(EEPROM_IIC_CHANNEL);
return true;
}
iic_stop(EEPROM_IIC_CHANNEL);
}
return false;
}
void ads_confige(unsigned int channel)
{
SysCtlPeripheralEnable(IIC_PERIPH);
SDA_Out;
SCL_Out;
SCL_H;
SDA_H;
unsigned char Initdata[4]={0};
switch (channel) {
case 0:
Initdata[2] = 0xc2;
break;
case 1:
Initdata[2] = 0xd2;
break;
case 2:
Initdata[2] = 0xe2;
break;
case 3:
Initdata[2] = 0xf2;
break;
default:
break;
}
/* address and write command */
Initdata[0] =0x90;
/* point register */
Initdata[1] =0x01;
Initdata[3] =0xe3;
/* Initdata[3] =0x03; // 配置字低字节 */
#if 1
unsigned char i=0;
start();
for(i=0;i<4;i++) {
iic_write_m(Initdata[i]);
}
stop();
#else
iic_write(Initdata[0], &Initdata[1], 3);
#endif
}
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;
}
static u8 gsl_write_interface(u8 reg,u8 *buf,u16 num)
{
iic_write(reg,buf,num);
return 1;
}
