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Started to implement gpio_irq_set

pull/17/head
Matthew Else 2013-07-22 13:30:00 +01:00
parent 4cf6f09411
commit 1da8e8a2c7
1 changed files with 38 additions and 22 deletions
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50
libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC11XX/gpio_irq_api.c
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@ -23,6 +23,7 @@
static uint32_t channel_ids[CHANNEL_NUM] = {0}; static uint32_t channel_ids[CHANNEL_NUM] = {0};
static gpio_irq_handler irq_handler; static gpio_irq_handler irq_handler;
static int gpioIrqInitialised = 0;
#warning (matthewelse) This code isn't working yet, so don't rely on it, or try to use it. #warning (matthewelse) This code isn't working yet, so don't rely on it, or try to use it.
@ -56,6 +57,7 @@ void gpio_irq3(void) {handle_interrupt_in(3);}
int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) { int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) {
if (pin == NC) return -1; if (pin == NC) return -1;
if (gpioInitialised) return;
irq_handler = handler; irq_handler = handler;
@ -96,6 +98,7 @@ int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32
NVIC_SetVector((IRQn_Type)(PININT_IRQ - obj->ch)), (uint32_t)channels_irq); NVIC_SetVector((IRQn_Type)(PININT_IRQ - obj->ch)), (uint32_t)channels_irq);
NVIC_EnableIRQ((IRQn_Type)(PININT_IRQ - obj->ch)); NVIC_EnableIRQ((IRQn_Type)(PININT_IRQ - obj->ch));
gpioInitialised = 1;
return 0; return 0;
} }
@ -105,27 +108,40 @@ void gpio_irq_free(gpio_irq_t *obj) {
} }
void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) { void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
unsigned int ch_bit = (1 << obj->ch); if (!gpioIqrInitialised) gpio_irq_init();
LPC_GPIO_TypeDef *port_reg = ((LPC_GPIO_TypeDef *) LPC_GPIO0_BASE + (obj->ch * 0x10000)); #warning (matthewelse) TODO: undefined port and value. Also need to do something with the *obj...
int port = 0;
int pin = 0;
// Clear interrupt LPC_GPIO_TypeDef *gpioRegisters;
if (!(&port_reg->ISEL & ch_bit))
&port_reg->IST = ch_bit; switch (port) {
case 0:
gpioRegisters = LPC_GPIO0;
break;
case 1:
gpioRegisters = LPC_GPIO1;
break;
case 2:
gpioRegisters = LPC_GPIO2;
break;
case 3:
gpioRegisters = LPC_GPIO3;
break;
}
gpioRegisters->IBE 0; // Assume that we only want to interrupt on high or low edges, not both.
gpioRegisters->IS &= ~(1 << pin);
// Edge trigger
&port_reg->ISEL &= ~ch_bit;
if (event == IRQ_RISE) {
if (enable) { if (enable) {
&port_reg->IENR |= ch_bit; gpioRegisters->IE |= (1<<pin);
} else {
&port_reg->IENR &= ~ch_bit;
}
} else {
if (enable) {
&port_reg->IENF |= ch_bit;
} else {
&port_reg->IENF &= ~ch_bit;
} }
if (event == IRP_RISE) {
gpioRegisters->IEV |= 1 << pin;
}
else {
gpioRegisters->IEV &= ~(1 << pin);
} }
} }