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Philips Semiconductors
/* Acknowledgement received from slave for slave address */
void ISR_18()
/* Acknowledgement received from slave for byte transmitted from master. Stop
condition is transmitted in this state signaling the end of transmission */
void ISR_28()
/********************************************************/
4.4.3 Linking notes for I
Since the interrupt vectors need to be remapped to SRAM hence the interrupt vector
table should be linked to 0x40000000. Remaining files could be linked after the interrupt
vector table. The first instruction to be executed will be the instruction located at
0x40000000, which would be
LDR PC, start
PC gets transferred to the assembly code and from there to the main C code. On an IRQ
interrupt, PC will execute the instruction located at the IRQ interrupt vector in the
interrupt vector table.
LDR PC, [PC, #-0xFF0]
On execution of this instruction, PC will start executing the I
4.5 Output waveforms
In the output waveform the following are shown
Application note
{
/* Port Indicator */
IOCLR=0x20;
/* Data to be transmitted */
I2DAT=0x55;
/* clear SI */
I2CONCLR=0x8;
/* Port Indicator */
IOSET=0x20;
}
{
/* Port Indicator */
IOCLR=0x80;
/* Transmit stop condition */
I2CONSET=0x10;
/* clear SI */
I2CONCLR=0x8;
/* Port Indicator */
IOSET=0x80;
}
2
C code:
• Start condition
• Stop condition
Rev. 01 — 06 April 2005
Philips ARM LPC microcontroller family
2
C ISR located in the C file.
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
AN10369
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