/*---------------------------------------------------------------------------------------------------------*/
void I2C0_IRQHandler(void)
{
uint32_t u32Status;
/* Check I2C Wake-up interrupt flag set or not */
if(I2C_GET_WAKEUP_FLAG(I2C0))
{
/* Clear I2C Wake-up interrupt flag */
I2C_CLEAR_WAKEUP_FLAG(I2C0);
g_u8SlvI2CWK = 1;
return;
}
u32Status = I2C_GET_STATUS(I2C0);
if(I2C_GET_TIMEOUT_FLAG(I2C0))
{
/* Clear I2C0 Timeout Flag */
I2C_ClearTimeoutFlag(I2C0);
}
else
{
if(s_I2C0HandlerFn != NULL)
s_I2C0HandlerFn(u32Status);
}
}
uint8_t TwoWire::endTransmission(uint8_t sendStop) {
int sent = 0; /* Send data */
int timeout_=TIMEOUT;
while(timeout_--)
{
/* Send start */
I2C_START(i2c);
I2C_WAIT_READY(i2c);
/* Send control byte */
I2C_SET_DATA(i2c, txAddress);
I2C_SET_CONTROL_REG(i2c, I2C_SI);
I2C_WAIT_READY(i2c);
if(I2C_GET_STATUS(i2c)!=0x18)
{
I2C_SET_CONTROL_REG(i2c, I2C_STO | I2C_SI);
continue;
}
sent = 0;
while (sent < txBufferLength) {
I2C_SET_DATA(i2c, txBuffer[sent++]);
I2C_SET_CONTROL_REG(i2c, I2C_SI);
I2C_WAIT_READY(i2c);
if(I2C_GET_STATUS(i2c)!=0x28) {
I2C_SET_CONTROL_REG(i2c, I2C_STO | I2C_SI);
continue;
}
}
if(sendStop==true)
{
/* Send stop */
I2C_SET_CONTROL_REG(i2c, I2C_STO | I2C_SI);
}
break;
}
// empty buffer
txBufferLength = 0;
status = MASTER_IDLE;
return sent;
}
/*************************************************************************
Issues a repeated start condition and sends address and transfer direction
Input: address and transfer direction of I2C device
Return: 0 device accessible
1 failed to access device
*************************************************************************/
unsigned char lib_i2c_rep_start(unsigned char address)
{
/* Send data */
I2C_SET_CONTROL_REG(I2C, I2C_STA | I2C_SI);
if (!I2C_WAIT_READY_ERROR(I2C))
return 4;
if(I2C_GET_STATUS(I2C) != 0x10) // Master repeat start
return 3;
// transmit address byte + direction
if (lib_i2c_write(address))
return 2;
return 0;
}
/*---------------------------------------------------------------------------------------------------------*/
void I2C3_IRQHandler(void)
{
uint32_t u32Status;
u32Status = I2C_GET_STATUS(I2C3);
if (I2C_GET_TIMEOUT_FLAG(I2C3)) {
/* Clear I2C3 Timeout Flag */
I2C_ClearTimeoutFlag(I2C3);
} else {
if (s_I2C3HandlerFn != NULL)
s_I2C3HandlerFn(u32Status);
}
}
/*************************************************************************
Send one byte to I2C device
Input: byte to be transfered
Return: 0 write successful
1 write failed
*************************************************************************/
unsigned char lib_i2c_write(unsigned char data)
{
I2C_SET_DATA(I2C, data);
I2C_SET_CONTROL_REG(I2C, I2C_SI);
if (!I2C_WAIT_READY_ERROR(I2C))
return 2;
// Check ACK
uint8_t status = I2C_GET_STATUS(I2C);
// Master TX/RX Address/Data ACKs
if (status != 0x18 && status != 0x28 && status != 0x40 && status != 0x50)
return 1;
return 0;
}
void TwoWire::onService(void) {
uint32_t u32Status;
u32Status = I2C_GET_STATUS(i2c);
if(I2C_GET_TIMEOUT_FLAG(i2c))
{
/* Clear I2C0 Timeout Flag */
I2C_ClearTimeoutFlag(i2c);
}
else
{
I2C_SlaveTRx(u32Status);
}
}
void I2C0_IRQHandler(void)
{
uint32_t u32Status;
u32Status = I2C_GET_STATUS(I2C0);
#if 0 //def DEBUG_ENABLE
printf("Status 0x%x \n", u32Status);
#endif
if (I2C_GET_TIMEOUT_FLAG(I2C0)) {
/* Clear I2C0 Timeout Flag */
I2C_ClearTimeoutFlag(I2C0);
} else {
if (s_I2C0HandlerFn != NULL)
s_I2C0HandlerFn(u32Status);
}
}
/*---------------------------------------------------------------------------------------------------------*/
void I2C1_IRQHandler(void)
{
uint32_t u32Status;
// clear interrupt flag
I2C1->INTSTS |= I2C_INTSTS_INTSTS_Msk;
u32Status = I2C_GET_STATUS(I2C1);
if (I2C_GET_TIMEOUT_FLAG(I2C1)) {
/* Clear I2C1 Timeout Flag */
I2C_ClearTimeoutFlag(I2C1);
} else {
if (s_I2C1HandlerFn != NULL)
s_I2C1HandlerFn(u32Status);
}
}
uint8_t TwoWire::requestFrom(uint8_t address, uint8_t quantity, uint8_t sendStop) {
if (quantity > BUFFER_LENGTH) quantity = BUFFER_LENGTH;
int readed = 0;
int timeout_=TIMEOUT;
while(timeout_--)
{
/* Send start */
I2C_START(i2c);
I2C_WAIT_READY(i2c);
/* Send control byte */
I2C_SET_DATA(i2c, (address<<1)+1);
I2C_SET_CONTROL_REG(i2c, I2C_SI | I2C_AA);
I2C_WAIT_READY(i2c);
if(I2C_GET_STATUS(i2c)!=0x40)
{ /* Send stop */
I2C_SET_CONTROL_REG(i2c, I2C_STO | I2C_SI);
continue;
}
readed = 0;
while (readed < quantity){
/* Read data */
if((readed+1)==quantity)
I2C_SET_CONTROL_REG(i2c, I2C_SI);
else
I2C_SET_CONTROL_REG(i2c, I2C_SI | I2C_AA);
I2C_WAIT_READY(i2c);
rxBuffer[readed++] = I2C_GET_DATA(i2c);
};
if(sendStop==true){
/* Send stop */
I2C_SET_CONTROL_REG(i2c, I2C_STO | I2C_SI);
}else
I2C_SET_CONTROL_REG(i2c, I2C_SI);
break;
}
// set rx buffer iterator vars
rxBufferIndex = 0;
rxBufferLength = readed;
return readed;
}
