void
ds1307Write(uint8_t addr, uint8_t data)
{
uint8_t ui3;
I2C_START_BIT;
do {
I2C_SEND_BYTE(TIMER_CTRL_WRITE);
I2C_GET_ACK(CY);
} while (NACK == CY);
do {
I2C_SEND_BYTE(addr);
I2C_GET_ACK(CY);
} while (NACK == CY);
do {
I2C_SEND_BYTE(data);
I2C_GET_ACK(CY);
} while (NACK == CY);
CY=0;
I2C_STOP_BIT;
}
void
eepromWriteBytes(uint16_t addr, uint8_t *val, uint8_t n_bytes)
{
uint8_t ui2, ui3;
DISABLE_ALL_INTERRUPTS;
for (; n_bytes>0; n_bytes--, val++, addr++) {
I2C_START_BIT;
I2C_SEND_BYTE(EEPROM_CTRL_WRITE);
I2C_GET_ACK(CY);
#if EP24C > 2
ui2 = addr>>8;
I2C_SEND_BYTE(ui2);
I2C_GET_ACK(CY);
#endif
ui2 = (uint8_t)addr;
I2C_SEND_BYTE(ui2);
I2C_GET_ACK(CY);
I2C_SEND_BYTE(val[0]);
I2C_GET_ACK(CY);
I2C_STOP_BIT;
delayms(10);
}
ENABLE_ALL_INTERRUPTS;
}
bool I2C_writeRegBuf(I2cDevice devId, u8 regAddr, const u8 *in, u32 size)
{
const u8 busId = i2cDevTable[devId].busId;
I2cRegs *const regs = i2cGetBusRegsBase(busId);
if(!i2cStartTransfer(devId, regAddr, false, regs)) return false;
while(--size)
{
regs->REG_I2C_DATA = *in++;
regs->REG_I2C_CNT = I2C_ENABLE | I2C_IRQ_ENABLE | I2C_DIRE_WRITE;
i2cWaitBusy(regs);
if(!I2C_GET_ACK(regs->REG_I2C_CNT)) // If ack flag is 0 it failed.
{
regs->REG_I2C_CNT = I2C_ENABLE | I2C_IRQ_ENABLE | I2C_ERROR | I2C_STOP;
return false;
}
}
regs->REG_I2C_DATA = *in;
regs->REG_I2C_CNT = I2C_ENABLE | I2C_IRQ_ENABLE | I2C_DIRE_WRITE | I2C_STOP;
i2cWaitBusy(regs);
if(!I2C_GET_ACK(regs->REG_I2C_CNT)) // If ack flag is 0 it failed.
{
regs->REG_I2C_CNT = I2C_ENABLE | I2C_IRQ_ENABLE | I2C_ERROR | I2C_STOP;
return false;
}
return true;
}
uint8_t
ds1307Read(uint8_t addr)
{
uint8_t ui3, data;
I2C_START_BIT;
do {
I2C_SEND_BYTE(TIMER_CTRL_WRITE);
I2C_GET_ACK(CY);
} while (NACK == CY);
do {
I2C_SEND_BYTE(addr);
I2C_GET_ACK(CY);
} while (NACK == CY);
I2C_START_BIT;
do {
I2C_SEND_BYTE(TIMER_CTRL_READ);
I2C_GET_ACK(CY);
} while (NACK == CY);
I2C_GET_BYTE(data);
I2C_SEND_ACK(1);
CY=0;
I2C_STOP_BIT;
return(data);
}
static bool i2cStartTransfer(I2cDevice devId, u8 regAddr, bool read, I2cRegs *const regs)
{
const u8 devAddr = i2cDevTable[devId].devAddr;
u32 i = 0;
for(; i < 8; i++)
{
i2cWaitBusy(regs);
// Select device and start.
regs->REG_I2C_DATA = devAddr;
regs->REG_I2C_CNT = I2C_ENABLE | I2C_IRQ_ENABLE | I2C_START;
i2cWaitBusy(regs);
if(!I2C_GET_ACK(regs->REG_I2C_CNT)) // If ack flag is 0 it failed.
{
regs->REG_I2C_CNT = I2C_ENABLE | I2C_IRQ_ENABLE | I2C_ERROR | I2C_STOP;
continue;
}
// Select register and change direction to write.
regs->REG_I2C_DATA = regAddr;
regs->REG_I2C_CNT = I2C_ENABLE | I2C_IRQ_ENABLE | I2C_DIRE_WRITE;
i2cWaitBusy(regs);
if(!I2C_GET_ACK(regs->REG_I2C_CNT)) // If ack flag is 0 it failed.
{
regs->REG_I2C_CNT = I2C_ENABLE | I2C_IRQ_ENABLE | I2C_ERROR | I2C_STOP;
continue;
}
// Select device in read mode for read transfer.
if(read)
{
regs->REG_I2C_DATA = devAddr | 1u; // Set bit 0 for read.
regs->REG_I2C_CNT = I2C_ENABLE | I2C_IRQ_ENABLE | I2C_START;
i2cWaitBusy(regs);
if(!I2C_GET_ACK(regs->REG_I2C_CNT)) // If ack flag is 0 it failed.
{
regs->REG_I2C_CNT = I2C_ENABLE | I2C_IRQ_ENABLE | I2C_ERROR | I2C_STOP;
continue;
}
}
break;
}
if(i < 8) return true;
else return false;
}
