ARMmbed
/
mbed-os
mirror of https://github.com/ARMmbed/mbed-os.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

Updates to interrupt handling

pull/17/head
Matthew Else 2013-07-22 13:56:56 +01:00
parent 1da8e8a2c7
commit fea818fccb
1 changed files with 10 additions and 35 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

45
libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC11XX/gpio_irq_api.c
View File

@ -28,6 +28,9 @@ static int gpioIrqInitialised = 0;
#warning (matthewelse) This code isn't working yet, so don't rely on it, or try to use it.
static inline void handle_interrupt_in(uint32_t channel) {
#error (matthewelse) There's no way this code will work now...
uint32_t ch_bit = (1 << channel);
LPC_GPIO_TypeDef *port_reg = ((LPC_GPIO_TypeDef *) LPC_GPIO0_BASE + (channel * 0x10000));
@ -60,43 +63,14 @@ int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32
if (gpioInitialised) return;
irq_handler = handler;
int found_free_channel = 0;
int i = 0;
for (i=0; i<CHANNEL_NUM; i++) {
if (channel_ids[i] == 0) {
channel_ids[i] = id;
obj->ch = i;
found_free_channel = 1;
break;
}
}
if (!found_free_channel) return -1;
/* Enable AHB clock to the GPIO domain. */
LPC_SYSCON->SYSAHBCLKCTRL |= (1<<6);
LPC_SYSCON->SYSAHBCLKCTRL |= SCB_SYSAHBCLKCTRL_GPIO;
/* Enable AHB clock to the FlexInt, GroupedInt domain. */
LPC_SYSCON->SYSAHBCLKCTRL |= ((1<<19) | (1<<23) | (1<<24));
/* To select a pin for any of the eight pin interrupts, write the pin number
* as 0 to 23 for pins PIO0_0 to PIO0_23 and 24 to 55.
* @see: mbed_capi/PinNames.h
*/
LPC_SYSCON->PINTSEL[obj->ch] = (pin >> 5) ? (pin - 8) : (pin);
// Interrupt Wake-Up Enable
LPC_SYSCON->STARTERP0 |= 1 << obj->ch;
void (*channels_irq)(void) = NULL;
switch (obj->ch) {
case 0: channels_irq = &gpio_irq0; break;
case 1: channels_irq = &gpio_irq1; break;
case 2: channels_irq = &gpio_irq2; break;
case 3: channels_irq = &gpio_irq3; break;
}
NVIC_SetVector((IRQn_Type)(PININT_IRQ - obj->ch)), (uint32_t)channels_irq);
NVIC_EnableIRQ((IRQn_Type)(PININT_IRQ - obj->ch));
NVIC_EnableIRQ(EINT0_IRQn);
NVIC_EnableIRQ(EINT1_IRQn);
NVIC_EnableIRQ(EINT2_IRQn);
NVIC_EnableIRQ(EINT3_IRQn);
gpioInitialised = 1;
return 0;
@ -107,6 +81,7 @@ void gpio_irq_free(gpio_irq_t *obj) {
LPC_SYSCON->STARTERP0 &= ~(1 << obj->ch);
}
// This is basically complete, but non-functional as it needs to do something with obj at some point.
void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
if (!gpioIqrInitialised) gpio_irq_init();