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an I2C fix 

an I2C fix for updated CI-test
pull/4438/head
Yuguo Zou 2017-04-27 19:06:33 +08:00 committed by Martin Kojtal
parent f000eb3401
commit 6c82b51f78
1 changed files with 29 additions and 12 deletions
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35
targets/TARGET_Realtek/TARGET_AMEBA/i2c_api.c
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@ -68,6 +68,9 @@ static const PinMap PinMap_I2C_SCL[] = {
{NC, NC, 0}
};
static int address_save_int;
static int Byte_count;
static char address_save[4];
static uint16_t i2c_target_addr[4];
static SAL_I2C_TRANSFER_BUF i2ctxtranbuf[4];
static SAL_I2C_TRANSFER_BUF i2crxtranbuf[4];
@ -223,6 +226,9 @@ void i2c_frequency(i2c_t *obj, int hz) {
}
inline int i2c_start(i2c_t *obj) {
address_save_int = 0;
Byte_count = 0;
memset(address_save, 0, sizeof(address_save));
return 0;
}
@ -268,7 +274,6 @@ int i2c_read(i2c_t *obj, int address, char *data, int length, int stop) {
length = length - pSalI2CHND->pRXBuf->DataLen;
return ((int)length);
} else {
//DBG_8195A(">\n");
/* Calculate user time out parameters */
I2CInTOTcnt = 300;
if ((I2CInTOTcnt != 0) && (I2CInTOTcnt != I2C_TIMEOOUT_ENDLESS)) {
@ -315,11 +320,9 @@ int i2c_write(i2c_t *obj, int address, const char *data, int length, int stop) {
pSalI2CHND = &(pSalI2CMngtAdpt->pSalHndPriv->SalI2CHndPriv);
address = (address & 0xFE ) >>1;
if (i2c_target_addr[pSalI2CHND->DevNum] != address) {
pSalI2CHND->pInitDat->I2CAckAddr = address;
i2c_target_addr[pSalI2CHND->DevNum] = address;
HalI2CSetTarRtl8195a(pSalI2CHND->pInitDat);
}
/* Check if the it's the last byte or not */
pSalI2CHND->I2CExd &= (~I2C_EXD_MTR_HOLD_BUS);
@ -337,7 +340,6 @@ int i2c_write(i2c_t *obj, int address, const char *data, int length, int stop) {
length = length - pSalI2CHND->pTXBuf->DataLen;
return ((int)length);
} else {
//DBG_8195A("(\n");
/* Calculate user time out parameters */
I2CInTOTcnt = 300;
if ((I2CInTOTcnt != 0) && (I2CInTOTcnt != I2C_TIMEOOUT_ENDLESS)) {
@ -395,25 +397,40 @@ int i2c_byte_read(i2c_t *obj, int last) {
}
int i2c_byte_write(i2c_t *obj, int data) {
if(Byte_count<3){
address_save[Byte_count]=data;
Byte_count++;
if(Byte_count==3){
address_save_int = (address_save[1]<<8)+address_save[2];
}
return 1;
}
int address = (address_save[0] & 0xFE ) >> 1;
address_save[1]= (unsigned char)(address_save_int >> 8);
address_save[2]= (unsigned char)(address_save_int & 0xFF);
address_save[3]= (unsigned char)data;
PSAL_I2C_MNGT_ADPT pSalI2CMngtAdpt = NULL;
PSAL_I2C_HND pSalI2CHND = NULL;
pSalI2CMngtAdpt = &(obj->SalI2CMngtAdpt);
pSalI2CHND = &(pSalI2CMngtAdpt->pSalHndPriv->SalI2CHndPriv);
pSalI2CHND->I2CExd &= (~I2C_EXD_MTR_HOLD_BUS);
pSalI2CHND->I2CExd |= I2C_EXD_MTR_HOLD_BUS;
pSalI2CHND->pInitDat->I2CAckAddr = address;
i2c_target_addr[pSalI2CHND->DevNum] = address;
HalI2CSetTarRtl8195a(pSalI2CHND->pInitDat);
pSalI2CHND->I2CExd &= (~I2C_EXD_MTR_HOLD_BUS);
pSalI2CHND->pTXBuf = &i2ctxtranbuf[pSalI2CHND->DevNum];
pSalI2CHND->pTXBuf->DataLen = 1;
pSalI2CHND->pTXBuf->DataLen = 3;
pSalI2CHND->pTXBuf->TargetAddr= i2c_target_addr[pSalI2CHND->DevNum];
pSalI2CHND->pTXBuf->RegAddr = 0;
pSalI2CHND->pTXBuf->pDataBuf = (unsigned char*)&data;
pSalI2CHND->pTXBuf->pDataBuf = address_save+1;
if (RtkI2CSend(pSalI2CHND) != HAL_OK) {
return 0;
}
address_save_int++;
return 1;
}