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

Revision:

0:01f31e923fe2

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/source/hic_hal/stm32/stm32f103xb/uart.c	Tue Apr 07 12:55:42 2020 +0200
@@ -0,0 +1,254 @@
+/**
+ * @file    uart.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 "string.h"
+
+#include "stm32f1xx.h"
+#include "uart.h"
+#include "gpio.h"
+#include "util.h"
+#include "circ_buf.h"
+#include "IO_Config.h"
+
+// For usart
+#define CDC_UART                     USART2
+#define CDC_UART_ENABLE()            __HAL_RCC_USART2_CLK_ENABLE()
+#define CDC_UART_DISABLE()           __HAL_RCC_USART2_CLK_DISABLE()
+#define CDC_UART_IRQn                USART2_IRQn
+#define CDC_UART_IRQn_Handler        USART2_IRQHandler
+
+#define UART_PINS_PORT_ENABLE()      __HAL_RCC_GPIOA_CLK_ENABLE()
+#define UART_PINS_PORT_DISABLE()     __HAL_RCC_GPIOA_CLK_DISABLE()
+
+#define UART_TX_PORT                 GPIOA
+#define UART_TX_PIN                  GPIO_PIN_2
+
+#define UART_RX_PORT                 GPIOA
+#define UART_RX_PIN                  GPIO_PIN_3
+
+#define UART_CTS_PORT                GPIOA
+#define UART_CTS_PIN                 GPIO_PIN_0
+
+#define UART_RTS_PORT                GPIOA
+#define UART_RTS_PIN                 GPIO_PIN_1
+
+
+#define RX_OVRF_MSG         "<DAPLink:Overflow>\n"
+#define RX_OVRF_MSG_SIZE    (sizeof(RX_OVRF_MSG) - 1)
+#define BUFFER_SIZE         (512)
+
+circ_buf_t write_buffer;
+uint8_t write_buffer_data[BUFFER_SIZE];
+circ_buf_t read_buffer;
+uint8_t read_buffer_data[BUFFER_SIZE];
+
+static UART_Configuration configuration = {
+    .Baudrate = 9600,
+    .DataBits = UART_DATA_BITS_8,
+    .Parity = UART_PARITY_NONE,
+    .StopBits = UART_STOP_BITS_1,
+    .FlowControl = UART_FLOW_CONTROL_NONE,
+};
+
+extern uint32_t SystemCoreClock;
+
+
+
+static void clear_buffers(void)
+{
+    circ_buf_init(&write_buffer, write_buffer_data, sizeof(write_buffer_data));
+    circ_buf_init(&read_buffer, read_buffer_data, sizeof(read_buffer_data));
+}
+
+int32_t uart_initialize(void)
+{
+    GPIO_InitTypeDef GPIO_InitStructure;
+
+    CDC_UART->CR1 &= ~(USART_IT_TXE | USART_IT_RXNE);
+    clear_buffers();
+
+    CDC_UART_ENABLE();
+    UART_PINS_PORT_ENABLE();
+
+    //TX pin
+    GPIO_InitStructure.Pin = UART_TX_PIN;
+    GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_HIGH;
+    GPIO_InitStructure.Mode = GPIO_MODE_AF_PP;
+    HAL_GPIO_Init(UART_TX_PORT, &GPIO_InitStructure);
+    //RX pin
+    GPIO_InitStructure.Pin = UART_RX_PIN;
+    GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_HIGH;
+    GPIO_InitStructure.Mode = GPIO_MODE_INPUT;
+    GPIO_InitStructure.Pull = GPIO_PULLUP;
+    HAL_GPIO_Init(UART_RX_PORT, &GPIO_InitStructure);
+    //CTS pin, input
+    GPIO_InitStructure.Pin = UART_CTS_PIN;
+    GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_HIGH;
+    GPIO_InitStructure.Mode = GPIO_MODE_INPUT;
+    GPIO_InitStructure.Pull = GPIO_PULLUP;
+    HAL_GPIO_Init(UART_CTS_PORT, &GPIO_InitStructure);
+    //RTS pin, output low
+    HAL_GPIO_WritePin(UART_RTS_PORT, UART_RTS_PIN, GPIO_PIN_RESET);
+    GPIO_InitStructure.Pin = UART_RTS_PIN;
+    GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_HIGH;
+    GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;
+    HAL_GPIO_Init(UART_RTS_PORT, &GPIO_InitStructure);
+
+    NVIC_EnableIRQ(CDC_UART_IRQn);
+
+    return 1;
+}
+
+int32_t uart_uninitialize(void)
+{
+    CDC_UART->CR1 &= ~(USART_IT_TXE | USART_IT_RXNE);
+    clear_buffers();
+    return 1;
+}
+
+int32_t uart_reset(void)
+{
+    const uint32_t cr1 = CDC_UART->CR1;
+    CDC_UART->CR1 = cr1 & ~(USART_IT_TXE | USART_IT_RXNE);
+    clear_buffers();
+    CDC_UART->CR1 = cr1 & ~USART_IT_TXE;
+    return 1;
+}
+
+int32_t uart_set_configuration(UART_Configuration *config)
+{
+    UART_HandleTypeDef uart_handle;
+    HAL_StatusTypeDef status;
+
+    memset(&uart_handle, 0, sizeof(uart_handle));
+    uart_handle.Instance = CDC_UART;
+
+    // parity
+    configuration.Parity = config->Parity;
+    if(config->Parity == UART_PARITY_ODD) {
+        uart_handle.Init.Parity = HAL_UART_PARITY_ODD;
+    } else if(config->Parity == UART_PARITY_EVEN) {
+        uart_handle.Init.Parity = HAL_UART_PARITY_EVEN;
+    } else if(config->Parity == UART_PARITY_NONE) {
+        uart_handle.Init.Parity = HAL_UART_PARITY_NONE;
+    } else {   //Other not support
+        uart_handle.Init.Parity = HAL_UART_PARITY_NONE;
+        configuration.Parity = UART_PARITY_NONE;
+    }
+
+    // stop bits
+    configuration.StopBits = config->StopBits;
+    if(config->StopBits == UART_STOP_BITS_2) {
+        uart_handle.Init.StopBits = UART_STOPBITS_2;
+    } else if(config->StopBits == UART_STOP_BITS_1_5) {
+        uart_handle.Init.StopBits = UART_STOPBITS_2;
+        configuration.StopBits = UART_STOP_BITS_2;
+    } else if(config->StopBits == UART_STOP_BITS_1) {
+        uart_handle.Init.StopBits = UART_STOPBITS_1;
+    } else {
+        uart_handle.Init.StopBits = UART_STOPBITS_1;
+        configuration.StopBits = UART_STOP_BITS_1;
+    }
+
+    //Only 8 bit support
+    configuration.DataBits = UART_DATA_BITS_8;
+    uart_handle.Init.WordLength = UART_WORDLENGTH_8B;
+
+    // No flow control
+    configuration.FlowControl = UART_FLOW_CONTROL_NONE;
+    uart_handle.Init.HwFlowCtl  = UART_HWCONTROL_NONE;
+    
+    // Specified baudrate
+    configuration.Baudrate = config->Baudrate;
+    uart_handle.Init.BaudRate = config->Baudrate;
+
+    // TX and RX
+    uart_handle.Init.Mode = UART_MODE_TX_RX;
+    
+    // Disable uart and tx/rx interrupt
+    CDC_UART->CR1 &= ~(USART_IT_TXE | USART_IT_RXNE);
+
+    clear_buffers();
+
+    status = HAL_UART_DeInit(&uart_handle);
+    util_assert(HAL_OK == status);
+    status = HAL_UART_Init(&uart_handle);
+    util_assert(HAL_OK == status);
+    (void)status;
+
+    CDC_UART->CR1 |= USART_IT_RXNE;
+
+    return 1;
+}
+
+int32_t uart_get_configuration(UART_Configuration *config)
+{
+    config->Baudrate = configuration.Baudrate;
+    config->DataBits = configuration.DataBits;
+    config->Parity   = configuration.Parity;
+    config->StopBits = configuration.StopBits;
+    config->FlowControl = UART_FLOW_CONTROL_NONE;
+
+    return 1;
+}
+
+int32_t uart_write_free(void)
+{
+    return circ_buf_count_free(&write_buffer);
+}
+
+int32_t uart_write_data(uint8_t *data, uint16_t size)
+{
+    uint32_t cnt = circ_buf_write(&write_buffer, data, size);
+    CDC_UART->CR1 |= USART_IT_TXE;
+
+    return cnt;
+}
+
+int32_t uart_read_data(uint8_t *data, uint16_t size)
+{
+    return circ_buf_read(&read_buffer, data, size);
+}
+
+void CDC_UART_IRQn_Handler(void)
+{
+    const uint32_t sr = CDC_UART->SR;
+
+    if (sr & USART_SR_RXNE) {
+        uint8_t dat = CDC_UART->DR;
+        uint32_t free = circ_buf_count_free(&read_buffer);
+        if (free > RX_OVRF_MSG_SIZE) {
+            circ_buf_push(&read_buffer, dat);
+        } else if (RX_OVRF_MSG_SIZE == free) {
+            circ_buf_write(&read_buffer, (uint8_t*)RX_OVRF_MSG, RX_OVRF_MSG_SIZE);
+        } else {
+            // Drop character
+        }
+    }
+
+    if (sr & USART_SR_TXE) {
+        if (circ_buf_count_used(&write_buffer) > 0) {
+            CDC_UART->DR = circ_buf_pop(&write_buffer);
+        } else {
+            CDC_UART->CR1 &= ~USART_IT_TXE;
+        }
+    }
+}