Johannes Stratmann
added prescaler for 16 bit pwm in LPC1347 target
Fork of
mbed-dev
by 
mbed official
Diff: targets/hal/TARGET_ARM_SSG/TARGET_BEETLE/gpio_irq_api.c
- Revision:
- 144:ef7eb2e8f9f7
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/hal/TARGET_ARM_SSG/TARGET_BEETLE/gpio_irq_api.c Fri Sep 02 15:07:44 2016 +0100
@@ -0,0 +1,399 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2015 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include <stddef.h>
+#include "cmsis.h"
+#include "gpio_irq_api.h"
+#include "mbed_error.h"
+
+#define CHANNEL_NUM 32
+#define CMSDK_GPIO_0 CMSDK_GPIO0
+#define CMSDK_GPIO_1 CMSDK_GPIO1
+#define PININT_IRQ 0
+
+static uint32_t channel_ids[CHANNEL_NUM] = {0};
+static gpio_irq_handler irq_handler;
+
+static inline void handle_interrupt_in(uint32_t channel) {
+ uint32_t ch_bit = (1 << channel);
+ // Return immediately if:
+ // * The interrupt was already served
+ // * There is no user handler
+ // * It is a level interrupt, not an edge interrupt
+ if (ch_bit <16){
+ if (((CMSDK_GPIO_0->INTSTATUS) == 0) || (channel_ids[channel] == 0)
+ || ((CMSDK_GPIO_0->INTTYPESET) == 0))
+ return;
+
+ if ((CMSDK_GPIO_0->INTTYPESET & ch_bit)
+ && (CMSDK_GPIO_0->INTPOLSET & ch_bit)) {
+ irq_handler(channel_ids[channel], IRQ_RISE);
+ CMSDK_GPIO_0->INTPOLSET = ch_bit;
+ }
+ if ((CMSDK_GPIO_0->INTTYPESET & ch_bit)
+ && ~(CMSDK_GPIO_0->INTPOLSET & ch_bit)) {
+ irq_handler(channel_ids[channel], IRQ_FALL);
+ }
+ CMSDK_GPIO_0->INTCLEAR = ch_bit;
+ }
+
+ if (ch_bit>=16) {
+ if (((CMSDK_GPIO_1->INTSTATUS) == 0) || (channel_ids[channel] == 0)
+ || ((CMSDK_GPIO_1->INTTYPESET) == 0))
+ return;
+
+ if ((CMSDK_GPIO_1->INTTYPESET & ch_bit)
+ && (CMSDK_GPIO_1->INTPOLSET & ch_bit)) {
+ irq_handler(channel_ids[channel], IRQ_RISE);
+ CMSDK_GPIO_1->INTPOLSET = ch_bit;
+ }
+ if ((CMSDK_GPIO_1->INTTYPESET & ch_bit)
+ && ~(CMSDK_GPIO_1->INTPOLSET & ch_bit)) {
+ irq_handler(channel_ids[channel], IRQ_FALL);
+ }
+ CMSDK_GPIO_1->INTCLEAR = ch_bit;
+ }
+}
+
+void gpio0_irq0(void) {
+ handle_interrupt_in(0);
+}
+
+void gpio0_irq1(void) {
+ handle_interrupt_in(1);
+}
+
+void gpio0_irq2(void) {
+ handle_interrupt_in(2);
+}
+
+void gpio0_irq3(void) {
+ handle_interrupt_in(3);
+}
+
+void gpio0_irq4(void) {
+ handle_interrupt_in(4);
+}
+
+void gpio0_irq5(void) {
+ handle_interrupt_in(5);
+}
+
+void gpio0_irq6(void) {
+ handle_interrupt_in(6);
+}
+
+void gpio0_irq7(void) {
+ handle_interrupt_in(7);
+}
+
+void gpio0_irq8(void) {
+ handle_interrupt_in(8);
+}
+
+void gpio0_irq9(void) {
+ handle_interrupt_in(9);
+}
+
+void gpio0_irq10(void) {
+ handle_interrupt_in(10);
+}
+
+void gpio0_irq11(void) {
+ handle_interrupt_in(11);
+}
+
+void gpio0_irq12(void) {
+ handle_interrupt_in(12);
+}
+
+void gpio0_irq13(void) {
+ handle_interrupt_in(13);
+}
+
+void gpio0_irq14(void) {
+ handle_interrupt_in(14);
+}
+
+void gpio0_irq15(void) {
+ handle_interrupt_in(15);
+}
+
+void gpio1_irq0(void) {
+ handle_interrupt_in(16);
+}
+
+void gpio1_irq1(void) {
+ handle_interrupt_in(17);
+}
+
+void gpio1_irq2(void) {
+ handle_interrupt_in(18);
+}
+
+void gpio1_irq3(void) {
+ handle_interrupt_in(19);
+}
+
+void gpio1_irq4(void) {
+ handle_interrupt_in(20);
+}
+
+void gpio1_irq5(void) {
+ handle_interrupt_in(21);
+}
+
+void gpio1_irq6(void) {
+ handle_interrupt_in(22);
+}
+
+void gpio1_irq7(void) {
+ handle_interrupt_in(23);
+}
+
+void gpio1_irq8(void) {
+ handle_interrupt_in(24);
+}
+
+void gpio1_irq9(void) {
+ handle_interrupt_in(25);
+}
+
+void gpio1_irq10(void) {
+ handle_interrupt_in(26);
+}
+
+void gpio1_irq11(void) {
+ handle_interrupt_in(27);
+}
+
+void gpio1_irq12(void) {
+ handle_interrupt_in(28);
+}
+
+void gpio1_irq13(void) {
+ handle_interrupt_in(29);
+}
+
+void gpio1_irq14(void) {
+ handle_interrupt_in(30);
+}
+
+void gpio1_irq15(void) {
+ handle_interrupt_in(31);
+}
+
+int gpio_irq_init(gpio_irq_t *obj, PinName pin,
+ gpio_irq_handler handler, uint32_t id) {
+ if (pin == NC) {return -1;}
+ else {
+
+ 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;
+ /* 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
+ */
+ if (pin <16) {
+ CMSDK_GPIO_0->INTENSET |= (0x1 << pin);
+ }
+
+ if (pin >= 16) {
+ CMSDK_GPIO_1->INTENSET |= (0x1 << pin);
+ }
+
+ void (*channels_irq)(void) = NULL;
+ switch (obj->ch) {
+ case 0:
+ channels_irq = &gpio0_irq0;
+ break;
+ case 1:
+ channels_irq = &gpio0_irq1;
+ break;
+ case 2:
+ channels_irq = &gpio0_irq2;
+ break;
+ case 3:
+ channels_irq = &gpio0_irq3;
+ break;
+ case 4:
+ channels_irq = &gpio0_irq4;
+ break;
+ case 5:
+ channels_irq = &gpio0_irq5;
+ break;
+ case 6:
+ channels_irq = &gpio0_irq6;
+ break;
+ case 7:
+ channels_irq = &gpio0_irq7;
+ break;
+ case 8:
+ channels_irq = &gpio0_irq8;
+ break;
+ case 9:
+ channels_irq = &gpio0_irq9;
+ break;
+ case 10:
+ channels_irq = &gpio0_irq10;
+ break;
+ case 11:
+ channels_irq = &gpio0_irq11;
+ break;
+ case 12:
+ channels_irq = &gpio0_irq12;
+ break;
+ case 13:
+ channels_irq = &gpio0_irq13;
+ break;
+ case 14:
+ channels_irq = &gpio0_irq14;
+ break;
+ case 15:
+ channels_irq = &gpio0_irq15;
+ break;
+ case 16:
+ channels_irq = &gpio1_irq0;
+ break;
+ case 17:
+ channels_irq = &gpio1_irq1;
+ break;
+ case 18:
+ channels_irq = &gpio1_irq2;
+ break;
+ case 19:
+ channels_irq = &gpio1_irq3;
+ break;
+ case 20:
+ channels_irq = &gpio1_irq4;
+ break;
+ case 21:
+ channels_irq = &gpio1_irq5;
+ break;
+ case 22:
+ channels_irq = &gpio1_irq6;
+ break;
+ case 23:
+ channels_irq = &gpio1_irq7;
+ break;
+ case 24:
+ channels_irq = &gpio1_irq8;
+ break;
+ case 25:
+ channels_irq = &gpio1_irq9;
+ break;
+ case 26:
+ channels_irq = &gpio1_irq10;
+ break;
+ case 27:
+ channels_irq = &gpio1_irq11;
+ break;
+ case 28:
+ channels_irq = &gpio1_irq12;
+ break;
+ case 29:
+ channels_irq = &gpio1_irq13;
+ break;
+ case 30:
+ channels_irq = &gpio1_irq14;
+ break;
+ case 31:
+ channels_irq = &gpio1_irq15;
+ break;
+ }
+ NVIC_SetVector((IRQn_Type)(PININT_IRQ + obj->ch),
+ (uint32_t)channels_irq);
+ NVIC_EnableIRQ((IRQn_Type)(PININT_IRQ + obj->ch));
+
+ return 0;
+ }
+}
+
+void gpio_irq_free(gpio_irq_t *obj) {
+}
+
+void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
+ unsigned int ch_bit = (1 << obj->ch);
+
+ // Clear interrupt
+ if (obj->ch <16) {
+ if (!(CMSDK_GPIO_0->INTTYPESET & ch_bit)) {
+ CMSDK_GPIO_0->INTCLEAR = ch_bit;
+ }
+ }
+ if (obj->ch >= 16) {
+ if (!(CMSDK_GPIO_1->INTTYPESET & ch_bit)) {
+ CMSDK_GPIO_1->INTCLEAR = ch_bit;
+ }
+ }
+
+ // Edge trigger
+ if (obj->ch <16) {
+ CMSDK_GPIO_0->INTTYPESET &= ch_bit;
+ if (event == IRQ_RISE) {
+ CMSDK_GPIO_0->INTPOLSET |= ch_bit;
+ if (enable) {
+ CMSDK_GPIO_0->INTENSET |= ch_bit;
+ } else {
+ CMSDK_GPIO_0->INTENCLR |= ch_bit;
+ }
+ } else {
+ CMSDK_GPIO_0->INTPOLCLR |= ch_bit;
+ if (enable) {
+ CMSDK_GPIO_0->INTENSET |= ch_bit;
+ } else {
+ CMSDK_GPIO_0->INTENCLR |= ch_bit;
+ }
+ }
+ }
+ if (obj->ch >= 16) {
+ CMSDK_GPIO_1->INTTYPESET &= ch_bit;
+ if (event == IRQ_RISE) {
+ CMSDK_GPIO_1->INTPOLSET |= ch_bit;
+ if (enable) {
+ CMSDK_GPIO_1->INTENSET |= ch_bit;
+ } else {
+ CMSDK_GPIO_1->INTENCLR |= ch_bit;
+ }
+ } else {
+ CMSDK_GPIO_1->INTPOLCLR |= ch_bit;
+ if (enable) {
+ CMSDK_GPIO_1->INTENSET |= ch_bit;
+ } else {
+ CMSDK_GPIO_1->INTENCLR |= ch_bit;
+ }
+ }
+ }
+}
+
+void gpio_irq_enable(gpio_irq_t *obj) {
+ NVIC_EnableIRQ((IRQn_Type)(PININT_IRQ + obj->ch));
+}
+
+void gpio_irq_disable(gpio_irq_t *obj) {
+ NVIC_DisableIRQ((IRQn_Type)(PININT_IRQ + obj->ch));
+}