Diff: source/hic_hal/stm32/stm32f103xb/gpio.c

Revision:

0:01f31e923fe2

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/source/hic_hal/stm32/stm32f103xb/gpio.c	Tue Apr 07 12:55:42 2020 +0200
@@ -0,0 +1,232 @@
+/**
+ * @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 "stm32f1xx.h"
+#include "DAP_config.h"
+#include "gpio.h"
+#include "daplink.h"
+#include "util.h"
+
+static TIM_HandleTypeDef timer;
+
+static void busy_wait(uint32_t cycles)
+{
+    volatile uint32_t i;
+    i = cycles;
+
+    while (i > 0) {
+        i--;
+    }
+}
+
+static uint32_t tim1_clk_div(uint32_t apb2clkdiv)
+{
+    switch (apb2clkdiv) {
+        case RCC_CFGR_PPRE2_DIV2:
+            return 1;
+        case RCC_CFGR_PPRE2_DIV4:
+            return 2;
+        case RCC_CFGR_PPRE2_DIV8:
+            return 4;
+        default: // RCC_CFGR_PPRE2_DIV1
+            return 1;
+    }
+}
+
+static void output_clock_enable(void)
+{
+    HAL_StatusTypeDef ret;
+    RCC_ClkInitTypeDef clk_init;
+    TIM_OC_InitTypeDef pwm_config;
+    uint32_t unused;
+    uint32_t period;
+    uint32_t source_clock;
+
+    HAL_RCC_GetClockConfig(&clk_init, &unused);
+
+    /* Compute the period value to have TIMx counter clock equal to 8000000 Hz */
+    source_clock = SystemCoreClock / tim1_clk_div(clk_init.APB2CLKDivider);
+    period = (uint32_t)(source_clock / 8000000) - 1;
+
+    /* Set TIMx instance */
+    timer.Instance = TIM1;
+
+    timer.Init.Period            = period;
+    timer.Init.Prescaler         = 0;
+    timer.Init.ClockDivision     = 0;
+    timer.Init.CounterMode       = TIM_COUNTERMODE_UP;
+    timer.Init.RepetitionCounter = 0;//period / 2;
+
+    __HAL_RCC_TIM1_CLK_ENABLE();
+
+    ret = HAL_TIM_PWM_DeInit(&timer);
+    if (ret != HAL_OK) {
+        util_assert(0);
+        return;
+    }
+
+    ret = HAL_TIM_PWM_Init(&timer);
+    if (ret != HAL_OK) {
+        util_assert(0);
+        return;
+    }
+
+    pwm_config.OCMode = TIM_OCMODE_PWM2;
+    pwm_config.Pulse = 0; // TODO - make sure this isn't used
+    pwm_config.OCPolarity = TIM_OCPOLARITY_HIGH;
+    pwm_config.OCNPolarity = TIM_OCPOLARITY_HIGH;
+    pwm_config.OCFastMode = TIM_OCFAST_DISABLE;
+    pwm_config.OCIdleState = TIM_OCIDLESTATE_RESET;
+    pwm_config.OCNIdleState = TIM_OCIDLESTATE_RESET;
+    ret = HAL_TIM_PWM_ConfigChannel(&timer, &pwm_config, TIM_CHANNEL_1);
+    if (ret != HAL_OK) {
+        util_assert(0);
+        return;
+    }
+
+    __HAL_TIM_SET_COMPARE(&timer, TIM_CHANNEL_1, period / 2);
+    ret = HAL_TIM_PWM_Start(&timer, TIM_CHANNEL_1);
+    if (ret != HAL_OK) {
+        util_assert(0);
+        return;
+    }
+
+    return;
+}
+
+void gpio_init(void)
+{
+    GPIO_InitTypeDef GPIO_InitStructure;
+    // enable clock to ports
+    __HAL_RCC_GPIOA_CLK_ENABLE();
+    __HAL_RCC_GPIOB_CLK_ENABLE();
+    __HAL_RCC_GPIOC_CLK_ENABLE();
+    __HAL_RCC_GPIOD_CLK_ENABLE();
+    // Enable USB connect pin
+    __HAL_RCC_AFIO_CLK_ENABLE();
+    // Disable JTAG to free pins for other uses
+    // Note - SWD is still enabled
+    __HAL_AFIO_REMAP_SWJ_NOJTAG();
+
+    USB_CONNECT_PORT_ENABLE();
+    USB_CONNECT_OFF();
+    GPIO_InitStructure.Pin = USB_CONNECT_PIN;
+    GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_HIGH;
+    GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;
+    HAL_GPIO_Init(USB_CONNECT_PORT, &GPIO_InitStructure);
+    // configure LEDs
+    HAL_GPIO_WritePin(RUNNING_LED_PORT, RUNNING_LED_PIN, GPIO_PIN_SET);
+    GPIO_InitStructure.Pin = RUNNING_LED_PIN;
+    GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_HIGH;
+    GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;
+    HAL_GPIO_Init(RUNNING_LED_PORT, &GPIO_InitStructure);
+
+    HAL_GPIO_WritePin(CONNECTED_LED_PORT, CONNECTED_LED_PIN, GPIO_PIN_SET);
+    GPIO_InitStructure.Pin = CONNECTED_LED_PIN;
+    GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_HIGH;
+    GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;
+    HAL_GPIO_Init(CONNECTED_LED_PORT, &GPIO_InitStructure);
+
+    HAL_GPIO_WritePin(PIN_CDC_LED_PORT, PIN_CDC_LED, GPIO_PIN_SET);
+    GPIO_InitStructure.Pin = PIN_CDC_LED;
+    GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_HIGH;
+    GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;
+    HAL_GPIO_Init(PIN_CDC_LED_PORT, &GPIO_InitStructure);
+
+    HAL_GPIO_WritePin(PIN_MSC_LED_PORT, PIN_MSC_LED, GPIO_PIN_SET);
+    GPIO_InitStructure.Pin = PIN_MSC_LED;
+    GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_HIGH;
+    GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;
+    HAL_GPIO_Init(PIN_MSC_LED_PORT, &GPIO_InitStructure);
+
+    // reset button configured as gpio open drain output with a pullup
+    HAL_GPIO_WritePin(nRESET_PIN_PORT, nRESET_PIN, GPIO_PIN_SET);
+    GPIO_InitStructure.Pin = nRESET_PIN;
+    GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_OD;
+    GPIO_InitStructure.Pull = GPIO_PULLUP;
+    HAL_GPIO_Init(nRESET_PIN_PORT, &GPIO_InitStructure);
+
+    // Turn on power to the board. When the target is unpowered
+    // it holds the reset line low.
+    HAL_GPIO_WritePin(POWER_EN_PIN_PORT, POWER_EN_PIN, GPIO_PIN_RESET);
+    GPIO_InitStructure.Pin = POWER_EN_PIN;
+    GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_HIGH;
+    GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;
+    HAL_GPIO_Init(POWER_EN_PIN_PORT, &GPIO_InitStructure);
+
+    // Setup the 8MHz MCO
+    GPIO_InitStructure.Pin = GPIO_PIN_8;
+    GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_HIGH;
+    GPIO_InitStructure.Mode = GPIO_MODE_AF_PP;
+    HAL_GPIO_Init(GPIOA, &GPIO_InitStructure);
+    output_clock_enable();
+
+    // Let the voltage rails stabilize.  This is especailly important
+    // during software resets, since the target's 3.3v rail can take
+    // 20-50ms to drain.  During this time the target could be driving
+    // the reset pin low, causing the bootloader to think the reset
+    // button is pressed.
+    // Note: With optimization set to -O2 the value 1000000 delays for ~85ms
+    busy_wait(1000000);
+}
+
+void gpio_set_hid_led(gpio_led_state_t state)
+{
+    // LED is active low
+    HAL_GPIO_WritePin(PIN_HID_LED_PORT, PIN_HID_LED, state ? GPIO_PIN_RESET : GPIO_PIN_SET);
+}
+
+void gpio_set_cdc_led(gpio_led_state_t state)
+{
+    // LED is active low
+    HAL_GPIO_WritePin(PIN_CDC_LED_PORT, PIN_CDC_LED, state ? GPIO_PIN_RESET : GPIO_PIN_SET);
+}
+
+void gpio_set_msc_led(gpio_led_state_t state)
+{
+    // LED is active low
+    HAL_GPIO_WritePin(PIN_MSC_LED_PORT, PIN_MSC_LED, state ? GPIO_PIN_RESET : GPIO_PIN_SET);
+}
+
+uint8_t gpio_get_reset_btn_no_fwrd(void)
+{
+    return (nRESET_PIN_PORT->IDR & nRESET_PIN) ? 0 : 1;
+}
+
+uint8_t gpio_get_reset_btn_fwrd(void)
+{
+    return 0;
+}
+
+
+uint8_t GPIOGetButtonState(void)
+{
+    return 0;
+}
+
+void target_forward_reset(bool assert_reset)
+{
+    // Do nothing - reset is forwarded in gpio_get_sw_reset
+}
+
+void gpio_set_board_power(bool powerEnabled)
+{
+}