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Merged
merged 1 commit into from
Apr 22, 2014
Merged

Update gpio_irq_api.c #268

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107 changes: 69 additions & 38 deletions libraries/mbed/targets/hal/TARGET_STM/TARGET_DISCO_F100RB/gpio_irq_api.c
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Original file line number Diff line number Diff line change
Expand Up @@ -39,41 +39,49 @@
#define EDGE_FALL (2)
#define EDGE_BOTH (3)

#define CHANNEL_NUM (4)
#define CHANNEL_NUM (16)

static uint32_t channel_ids[CHANNEL_NUM] = {0, 0, 0, 0};
static uint32_t channel_gpio[CHANNEL_NUM] = {0, 0, 0, 0};
static uint32_t channel_pin[CHANNEL_NUM] = {0, 0, 0, 0};
static uint32_t channel_ids[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
static uint32_t channel_gpio[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
static uint32_t channel_pin[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

static gpio_irq_handler irq_handler;

static void handle_interrupt_in(uint32_t irq_index) {
// Retrieve the gpio and pin that generate the irq
GPIO_TypeDef *gpio = (GPIO_TypeDef *)(channel_gpio[irq_index]);
uint32_t pin = (uint32_t)(1 << channel_pin[irq_index]);

// Clear interrupt flag
if (EXTI_GetITStatus(pin) != RESET)
{
EXTI_ClearITPendingBit(pin);
}

if (channel_ids[irq_index] == 0) return;

// Check which edge has generated the irq
if ((gpio->IDR & pin) == 0) {
irq_handler(channel_ids[irq_index], IRQ_FALL);
}
else {
irq_handler(channel_ids[irq_index], IRQ_RISE);
}
//if irq_index==5 loop exti 5 to 9
//if irq_index==10 loop exti 10 to 15
//else exti loop one irq_index
uint32_t to_irq_index=(irq_index==5)?9:((irq_index==10)?15:irq_index);
GPIO_TypeDef *gpio;
uint32_t pin;
do{
// Retrieve the gpio and pin that generate the irq
gpio = (GPIO_TypeDef *)(channel_gpio[irq_index]);
pin = (uint32_t)(1 << channel_pin[irq_index]);
// Clear interrupt flag
if (EXTI_GetITStatus(pin) != RESET)
{
EXTI_ClearITPendingBit(pin);
if (channel_ids[irq_index] == 0) return;
// Check which edge has generated the irq
if ((gpio->IDR & pin) == 0) {
irq_handler(channel_ids[irq_index], IRQ_FALL);
} else {
irq_handler(channel_ids[irq_index], IRQ_RISE);
}
}
}while(irq_index++ < to_irq_index);
}


// The irq_index is passed to the function
static void gpio_irq0(void) {handle_interrupt_in(0);}
static void gpio_irq1(void) {handle_interrupt_in(1);}
static void gpio_irq2(void) {handle_interrupt_in(2);}
static void gpio_irq3(void) {handle_interrupt_in(3);}
static void gpio_irq0(void) {handle_interrupt_in(0);} // EXTI line 0
static void gpio_irq1(void) {handle_interrupt_in(1);} // EXTI line 1
static void gpio_irq2(void) {handle_interrupt_in(2);} // EXTI line 2
static void gpio_irq3(void) {handle_interrupt_in(3);} // EXTI line 3
static void gpio_irq4(void) {handle_interrupt_in(4);} // EXTI line 4
static void gpio_irq5(void) {handle_interrupt_in(5);} // EXTI lines 5 to 9
static void gpio_irq6(void) {handle_interrupt_in(10);} // EXTI lines 10 to 15

extern uint32_t Set_GPIO_Clock(uint32_t port_idx);

Expand All @@ -88,32 +96,55 @@ int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32
uint32_t pin_index = STM_PIN(pin);

// Select irq number and interrupt routine
switch (pin) {
case PC_13: // User button
irq_n = EXTI15_10_IRQn;
switch (pin_index) {
case 0:
irq_n = EXTI0_IRQn;
vector = (uint32_t)&gpio_irq0;
irq_index = 0;
break;
case PB_3:
irq_n = EXTI3_IRQn;
case 1:
irq_n = EXTI1_IRQn;
vector = (uint32_t)&gpio_irq1;
irq_index = 1;
break;
case PB_4:
irq_n = EXTI4_IRQn;
case 2:
irq_n = EXTI2_IRQn;
vector = (uint32_t)&gpio_irq2;
irq_index = 2;
break;
case PB_5:
irq_n = EXTI9_5_IRQn;
case 3:
irq_n = EXTI3_IRQn;
vector = (uint32_t)&gpio_irq3;
irq_index = 3;
break;
case 4:
irq_n = EXTI4_IRQn;
vector = (uint32_t)&gpio_irq4;
irq_index = 4;
break;
case 5:
case 6:
case 7:
case 8:
case 9:
irq_n = EXTI9_5_IRQn;
vector = (uint32_t)&gpio_irq5;
irq_index = pin_index;
break;
case 10:
case 11:
case 12:
case 13:
case 14:
case 15:
irq_n = EXTI15_10_IRQn;
vector = (uint32_t)&gpio_irq6;
irq_index = pin_index;
break;
default:
error("This pin is not supported with InterruptIn.");
error("InterruptIn error: pin not supported.\n");
return -1;
}

// Enable GPIO clock
uint32_t gpio_add = Set_GPIO_Clock(port_index);

Expand Down