/*
** ===================================================================
** Method : EE241_ReadBlock (component 24AA_EEPROM)
** Description :
** Read a block of memory.
** Parameters :
** NAME - DESCRIPTION
** addr - Address where to read the memory
** * data - Pointer to a buffer where to store the
** data
** dataSize - Size of buffer the data pointer
** is pointing to
** Returns :
** --- - Error code, possible values
** ERR_OK - OK
** otherwise it can return an error code of
** the underlying communication protocol.
** ===================================================================
*/
byte EE241_ReadBlock(EE241_Address addr, byte *data, word dataSize)
{
uint8_t res;
#if EE241_DEVICE_ID==EE241_DEVICE_ID_8
uint8_t addr8;
addr8 = (uint8_t)(addr&0xff);
#else
uint8_t addr16[2]; /* big endian address on I2C bus needs to be 16bit */
addr16[0] = (uint8_t)(addr>>8); /* 16 bit address must be in big endian format */
addr16[1] = (uint8_t)(addr&0xff);
#endif
res = GI2C1_SelectSlave(EE241_DEVICE_ADDR(addr));
if (res != ERR_OK) {
(void)GI2C1_UnselectSlave();
return res;
}
#if EE241_DEVICE_ID==EE241_DEVICE_ID_8
res = GI2C1_WriteBlock(&addr8, 1, GI2C1_DO_NOT_SEND_STOP); /* send 8bit address */
#else
res = GI2C1_WriteBlock(addr16, 2, GI2C1_DO_NOT_SEND_STOP); /* send 16bit address */
#endif
if (res != ERR_OK) {
(void)GI2C1_UnselectSlave();
return res;
}
res = GI2C1_ReadBlock(data, dataSize, GI2C1_SEND_STOP);
if (res != ERR_OK) {
(void)GI2C1_UnselectSlave();
return res;
}
return GI2C1_UnselectSlave();
}
uint8_t MCP4728_Read(uint8_t buf[3*8], size_t bufSize) {
uint8_t res;
if (bufSize!=2*3*4) {
return ERR_FAILED;
}
res = GI2C1_SelectSlave(MCP4728_I2C_ADDRESS);
if (res!=ERR_OK) {
return res;
}
res = GI2C1_ReadBlock(buf, bufSize, GI2C1_SEND_STOP);
if (res!=ERR_OK) {
(void)GI2C1_UnselectSlave();
return res;
}
res = GI2C1_UnselectSlave();
if (res!=ERR_OK) {
return res;
}
return ERR_OK;
}
