Disabling Interrupts in the ARM core

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Read-Only Author Soennichsen Richard Posted 20-Dec-2004 15:16 Toolset ARM	Disabling Interrupts in the ARM core Soennichsen Richard I have tried to globally disable interrupts using the assembly defines mentioned in the Keil note about nested interrupts. http://www.keil.com/support/docs/2910.htm When I try to call IENABLE or IDISABLE I get assembler errors associated with the MRS LR op-code. Has anyone gotten this to work? Is there an alternative method to globally diasabling interrupts in the Keil environment? Rich

Read-Only Author Soennichsen Richard Posted 20-Dec-2004 16:19 Toolset ARM	RE: Disabling Interrupts in the ARM core Soennichsen Richard I found the problem. There is an SPI register defined as SPSR (LPC210x.h) which is the same as the Saved Program Staus Register in the ARM core. This creates a conflict when embedding assembly code in C code. Keil, are you listening? ;-) Rich

Read-Only Author Jon Ward Posted 20-Dec-2004 17:48 Toolset ARM	RE: Disabling Interrupts in the ARM core Jon Ward In the LPX210x.H file that I have the SPI SPSR register is defined as follows: /* SPI (Serial Peripheral Interface) / #define SPI_SPCR (((volatile unsigned char ) 0xE0020000)) #define SPI_SPSR (((volatile unsigned char ) 0xE0020004)) #define SPI_SPDR (((volatile unsigned char ) 0xE0020008)) #define SPI_SPCCR (((volatile unsigned char ) 0xE002000C)) #define SPI_SPTCR (((volatile unsigned char ) 0xE0020010)) #define SPI_SPTSR (((volatile unsigned char ) 0xE0020014)) #define SPI_SPTOR (((volatile unsigned char ) 0xE0020018)) #define SPI_SPINT (((volatile unsigned char ) 0xE002001C)) Is yours defined differently than that? You can download this file from http://www.keil.com/dd/chip/3483.htm. Jon*

Read-Only Author Richard Soennichsen Posted 21-Dec-2004 00:47 Toolset ARM	RE: Disabling Interrupts in the ARM core Richard Soennichsen Hi Jon, Yes, in mine (I have downloaded the latest update and our package is only a week old) the SPI_ is missing for all SPI SFRs. Richard

Read-Only Author Keil Reinhard Posted 21-Dec-2004 01:11 Toolset ARM	RE: Disabling Interrupts in the ARM core Keil Reinhard The SPI_ prefix has been taken out by Philips. Now we have got this conflict. I am in contact with Philips to sort it out and make it consistent with the datasheets. Reinhard

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