diff options
| -rwxr-xr-x | nuttx/arch/arm/src/lpc17xx/lpc17_gpioint.c | 60 |
1 files changed, 59 insertions, 1 deletions
diff --git a/nuttx/arch/arm/src/lpc17xx/lpc17_gpioint.c b/nuttx/arch/arm/src/lpc17xx/lpc17_gpioint.c index 250c46058..da06f8f32 100755 --- a/nuttx/arch/arm/src/lpc17xx/lpc17_gpioint.c +++ b/nuttx/arch/arm/src/lpc17xx/lpc17_gpioint.c @@ -241,12 +241,70 @@ static void lpc17_setintedge(uint32_t intbase, unsigned int pin, unsigned int ed * Name: lpc17_irq2port * * Description: - * Get the stored interrupt edge configuration. + * Given an IRQ number, return the GPIO port number (0 or 2) of the interrupt. * ****************************************************************************/ static int lpc17_irq2port(int irq) { + /* Set 1: 12 interrupts p0.0-p0.11 */ + + if (irq >= LPC17_VALID_FIRST0L && irq < (LPC17_VALID_FIRST0L+LPC17_VALID_NIRQS0L) + { + return 0; + } + + /* Set 2: 16 interrupts p0.15-p0.30 */ + + else if (irq >= LPC17_VALID_FIRST0H && irq < (LPC17_VALID_FIRST0H+LPC17_VALID_NIRQS0H) + { + return 0; + } + + /* Set 3: 14 interrupts p2.0-p2.13 */ + + else if (irq >= LPC17_VALID_NIRQS2 && irq < (LPC17_VALID_FIRST2+LPC17_VALID_NIRQS2) + { + return 2; + } + return -EINVAL; +} + +/**************************************************************************** + * Name: lpc17_irq2pin + * + * Description: + * Given an IRQ number, return the GPIO pin number (0..31) of the interrupt. + * + ****************************************************************************/ + +static int lpc17_irq2port(int irq) +{ + /* Set 1: 12 interrupts p0.0-p0.11 */ + + if (irq >= LPC17_VALID_FIRST0L && irq < (LPC17_VALID_FIRST0L+LPC17_VALID_NIRQS0L) + { + return irq - LPC17_VALID_FIRST0L + LPC17_VALID_SHIFT0L; + } + + /* Set 2: 16 interrupts p0.15-p0.30 */ + + else if (irq >= LPC17_VALID_FIRST0H && irq < (LPC17_VALID_FIRST0H+LPC17_VALID_NIRQS0H) + { + return irq - LPC17_VALID_FIRST0H + LPC17_VALID_SHIFT0H; + + 12 + } + + /* Set 3: 14 interrupts p2.0-p2.13 */ + + else if (irq >= LPC17_VALID_NIRQS2 && irq < (LPC17_VALID_FIRST2+LPC17_VALID_NIRQS2) + { + return irq - LPC17_VALID_FIRST0H + LPC17_VALID_SHIFT2; + } + return -EINVAL; +} + /**************************************************************************** * Global Functions |