Diff: source/hic_hal/atmel/sam3u2c/gpio.c

Revision:

0:01f31e923fe2

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/source/hic_hal/atmel/sam3u2c/gpio.c	Tue Apr 07 12:55:42 2020 +0200
@@ -0,0 +1,116 @@
+/**
+ * @file    gpio.c
+ * @brief
+ *
+ * DAPLink Interface Firmware
+ * Copyright (c) 2009-2016, ARM Limited, All Rights Reserved
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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 "sam3u.h"
+#include "gpio.h"
+#include "uart.h"
+#include "compiler.h"
+#include "daplink.h"
+
+// This GPIO configuration is only valid for the SAM3U2C
+COMPILER_ASSERT(DAPLINK_HIC_ID == DAPLINK_HIC_ID_SAM3U2C);
+
+void gpio_init(void)
+{
+    volatile int Cnt;
+    //
+    // Initially enable clock for GPIO and initialize LED ports as output with LED == off
+    //
+    PMC->PMC_PCER0 = (1 << 10) | (1 << 11) | (1 << 12);  // Enable clock for all PIOs
+
+    // DAP LED
+    PIN_DAP_LED_PORT->PIO_PER = PIN_DAP_LED;
+    PIN_DAP_LED_PORT->PIO_SODR = PIN_DAP_LED;
+    PIN_DAP_LED_PORT->PIO_OER = PIN_DAP_LED;
+
+    // MSD LED
+    PIN_MSD_LED_PORT->PIO_PER = PIN_MSD_LED;
+    PIN_MSD_LED_PORT->PIO_SODR = PIN_MSD_LED;
+    PIN_MSD_LED_PORT->PIO_OER = PIN_MSD_LED;
+
+    // CDC LED
+    PIN_CDC_LED_PORT->PIO_PER = PIN_CDC_LED;
+    PIN_CDC_LED_PORT->PIO_SODR = PIN_CDC_LED;
+    PIN_CDC_LED_PORT->PIO_OER = PIN_CDC_LED;
+
+    // Forwarded reset
+    PIN_RESET_IN_FWRD_PORT->PIO_PER  = PIN_RESET_IN_FWRD; // Pin == GPIO control
+    PIN_RESET_IN_FWRD_PORT->PIO_ODR  = PIN_RESET_IN_FWRD; // Disable output
+    PIN_RESET_IN_FWRD_PORT->PIO_PUER = PIN_RESET_IN_FWRD; // Enable pull-up
+    Cnt = 1000000;
+    do {} while (--Cnt);    // Give pull-up some time to become active
+
+    // Enable port A interrupts in the NVIC
+    NVIC_EnableIRQ(PIOA_IRQn);
+}
+
+void gpio_set_hid_led(gpio_led_state_t state)
+{
+    if (GPIO_LED_ON == state) {
+        PIN_DAP_LED_PORT->PIO_CODR = PIN_DAP_LED; // LED == on
+    } else {
+        PIN_DAP_LED_PORT->PIO_SODR = PIN_DAP_LED; // LED == off
+    }
+}
+
+void gpio_set_cdc_led(gpio_led_state_t state)
+{
+    if (GPIO_LED_ON == state) {
+        PIN_CDC_LED_PORT->PIO_CODR = PIN_CDC_LED; //  LED == on
+    } else {
+        PIN_CDC_LED_PORT->PIO_SODR = PIN_CDC_LED; //  LED == off
+    }
+}
+
+void gpio_set_msc_led(gpio_led_state_t state)
+{
+    if (GPIO_LED_ON == state) {
+        PIN_MSD_LED_PORT->PIO_CODR = PIN_MSD_LED; //  LED == on
+    } else {
+        PIN_MSD_LED_PORT->PIO_SODR = PIN_MSD_LED; //  LED == off
+    }
+}
+
+void PIOA_IRQHandler(void)
+{
+    //
+    // ISR is called when flow control is de-asserted
+    //
+    uint32_t interrupts = PIOA->PIO_ISR;
+
+    if ((interrupts >> 9) & 1) { //CTS
+        uart_software_flow_control();
+    }
+}
+
+uint8_t gpio_get_reset_btn_no_fwrd(void)
+{
+    return 0;
+}
+
+uint8_t gpio_get_reset_btn_fwrd()
+{
+    return (PIN_RESET_IN_FWRD_PORT->PIO_PDSR & PIN_RESET_IN_FWRD) == 0;
+}
+
+void gpio_set_board_power(bool powerEnabled)
+{
+}