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https://github.com/openmv/openmv.git
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356 lines
10 KiB
C
356 lines
10 KiB
C
/* Copyright (C) 2022 Alif Semiconductor - All Rights Reserved.
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* Use, distribution and modification of this code is permitted under the
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* terms stated in the Alif Semiconductor Software License Agreement
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*
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* You should have received a copy of the Alif Semiconductor Software
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* License Agreement with this file. If not, please write to:
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* contact@alifsemi.com, or visit: https://alifsemi.com/license
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*
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*/
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/******************************************************************************
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* @file UART2_Baremetal.c
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* @author Tanay Rami
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* @email tanay@alifsemi.com
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* @version V1.0.1
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* @date 26-May-2023
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* @brief TestApp to verify UART interface using baremetal, no operating system.
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* UART interactive console application (using UART2 instance):
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* UART waits for a char on serial terminal;
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* if 'Enter' key is received; UART Sends back "Hello World!".
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* else, it sends back received character.
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* @bug None.
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* @Note Updated for B0
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******************************************************************************/
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/* System Includes */
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#include <stdio.h>
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/* Project Includes */
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/* include for UART Driver */
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#include "Driver_USART.h"
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/* PINMUX Driver */
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#include "pinconf.h"
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#include "RTE_Components.h"
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#if defined(RTE_Compiler_IO_STDOUT)
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#include "retarget_stdout.h"
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#endif /* RTE_Compiler_IO_STDOUT */
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#include "RTE_Device.h"
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/*
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* UART2 CLK SOURCE: Defines UART2 clock source.
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* <0=> CLK_38.4MHz (CLKEN_HFOSC)
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* <1=> CLK_100MHz
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*/
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#if (RTE_UART2_CLK_SOURCE == 0) /* CLK_38.4MHz */
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#include "se_services_port.h"
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#endif
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/* UART Driver instance (UART0-UART7) */
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#define UART 2
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/* UART Driver */
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extern ARM_DRIVER_USART ARM_Driver_USART_(UART);
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/* UART Driver instance */
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static ARM_DRIVER_USART *USARTdrv = &ARM_Driver_USART_(UART);
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void myUART_Thread_entry();
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#define UART_CB_TX_EVENT (1U << 0)
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#define UART_CB_RX_EVENT (1U << 1)
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#define UART_CB_RX_TIMEOUT (1U << 2)
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#define UART_CB_RX_BREAK (1U << 3)
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#define UART_CB_RX_FRAMING_ERROR (1U << 4)
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#define UART_CB_RX_PARITY_ERROR (1U << 5)
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#define UART_CB_RX_OVERFLOW (1U << 6)
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volatile uint32_t event_flags_uart;
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/**
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* @function int hardware_init(void)
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* @brief UART hardware pin initialization using PIN-MUX driver
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* @note none
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* @param void
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* @retval 0:success, -1:failure
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*/
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int hardware_init(void)
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{
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/* UART2_RX_A */
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pinconf_set( PORT_1, PIN_0, PINMUX_ALTERNATE_FUNCTION_1, PADCTRL_READ_ENABLE);
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/* UART2_TX_A */
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pinconf_set( PORT_1, PIN_1, PINMUX_ALTERNATE_FUNCTION_1, 0);
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return 0;
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}
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/**
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* @function void myUART_callback(uint32_t event)
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* @brief UART isr callabck
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* @note none
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* @param event: USART Event
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* @retval none
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*/
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void myUART_callback(uint32_t event)
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{
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if (event & ARM_USART_EVENT_SEND_COMPLETE)
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{
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/* Send Success */
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event_flags_uart |= UART_CB_TX_EVENT;
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}
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if (event & ARM_USART_EVENT_RECEIVE_COMPLETE)
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{
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/* Receive Success */
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event_flags_uart |= UART_CB_RX_EVENT;
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}
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if (event & ARM_USART_EVENT_RX_TIMEOUT)
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{
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/* Receive Success with rx timeout */
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event_flags_uart |= UART_CB_RX_TIMEOUT;
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}
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if (event & ARM_USART_EVENT_RX_BREAK)
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{
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/* Receive Break */
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event_flags_uart |= UART_CB_RX_BREAK;
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}
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if (event & ARM_USART_EVENT_RX_FRAMING_ERROR)
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{
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/* Receive Framing Error */
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event_flags_uart |= UART_CB_RX_FRAMING_ERROR;
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}
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if (event & ARM_USART_EVENT_RX_PARITY_ERROR)
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{
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/* Receive Parity Error */
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event_flags_uart |= UART_CB_RX_PARITY_ERROR;
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}
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if (event & ARM_USART_EVENT_RX_OVERFLOW)
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{
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/* Receive Overflow */
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event_flags_uart |= UART_CB_RX_OVERFLOW;
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}
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}
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/**
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* @function void myUART_Thread_entry()
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* @brief TestApp to verify UART interface
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* UART interactive console application:
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* UART waits for a char on serial terminal;
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* if 'Enter' key is received; UART Sends back "Hello World!".
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* else, it sends back received character.
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* @note none
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* @param none
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* @retval none
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*/
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void myUART_Thread_entry()
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{
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char cmd;
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int32_t ret;
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ARM_DRIVER_VERSION version;
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event_flags_uart = 0;
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#if (RTE_UART2_CLK_SOURCE == 0) /* CLK_38.4MHz */
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uint32_t service_error_code;
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uint32_t error_code = SERVICES_REQ_SUCCESS;
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/* Initialize the SE services */
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se_services_port_init();
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/* enable the HFOSC clock */
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error_code = SERVICES_clocks_enable_clock(se_services_s_handle,
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/*clock_enable_t*/ CLKEN_HFOSC,
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/*bool enable */ true,
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&service_error_code);
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if(error_code)
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printf("SE: clk enable = %d\n", error_code);
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#endif /* CLK_38.4MHz */
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printf("\r\n >>> UART testApp starting up!!!...<<< \r\n");
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version = USARTdrv->GetVersion();
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printf("\r\n UART version api:%X driver:%X...\r\n",version.api, version.drv);
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/* Initialize UART hardware pins using PinMux Driver. */
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ret = hardware_init();
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if(ret != 0)
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{
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printf("\r\n Error in UART hardware_init.\r\n");
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return;
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}
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/* Initialize UART driver */
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ret = USARTdrv->Initialize(myUART_callback);
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if(ret != ARM_DRIVER_OK)
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{
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printf("\r\n Error in UART Initialize.\r\n");
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return;
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}
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/* Power up UART peripheral */
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ret = USARTdrv->PowerControl(ARM_POWER_FULL);
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if(ret != ARM_DRIVER_OK)
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{
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printf("\r\n Error in UART Power Up.\r\n");
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goto error_uninitialize;
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}
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/* Configure UART to 115200 Bits/sec */
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ret = USARTdrv->Control(ARM_USART_MODE_ASYNCHRONOUS |
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ARM_USART_DATA_BITS_8 |
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ARM_USART_PARITY_NONE |
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ARM_USART_STOP_BITS_1 |
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ARM_USART_FLOW_CONTROL_NONE, 115200);
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if(ret != ARM_DRIVER_OK)
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{
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printf("\r\n Error in UART Control.\r\n");
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goto error_poweroff;
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}
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/* Enable Receiver and Transmitter lines */
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ret = USARTdrv->Control(ARM_USART_CONTROL_TX, 1);
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if(ret != ARM_DRIVER_OK)
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{
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printf("\r\n Error in UART Control TX.\r\n");
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goto error_poweroff;
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}
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ret = USARTdrv->Control(ARM_USART_CONTROL_RX, 1);
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if(ret != ARM_DRIVER_OK)
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{
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printf("\r\n Error in UART Control RX.\r\n");
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goto error_poweroff;
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}
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printf("\r\n Press Enter or any character on serial terminal to receive a message:\r\n");
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event_flags_uart &= ~UART_CB_TX_EVENT;
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ret = USARTdrv->Send("\r\nPress Enter or any character to receive a message\r\n", 53);
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if(ret != ARM_DRIVER_OK)
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{
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printf("\r\n Error in UART Send.\r\n");
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goto error_poweroff;
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}
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/* wait for event flag after UART call */
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while(!(event_flags_uart & (UART_CB_TX_EVENT)));
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while(1)
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{
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/* Get byte from UART - clear event flag before UART call */
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event_flags_uart &= ~(UART_CB_RX_EVENT | UART_CB_RX_TIMEOUT);
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ret = USARTdrv->Receive(&cmd, 1);
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if(ret != ARM_DRIVER_OK)
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{
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printf("\r\n Error in UART Receive.\r\n");
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goto error_poweroff;
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}
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/* wait for event flag after UART call */
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while(!(event_flags_uart & (UART_CB_RX_EVENT | UART_CB_RX_TIMEOUT | UART_CB_RX_BREAK)));
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/* check for any RX error. */
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if (event_flags_uart & (UART_CB_RX_BREAK | UART_CB_RX_FRAMING_ERROR | \
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UART_CB_RX_PARITY_ERROR | UART_CB_RX_OVERFLOW))
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{
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/* clear error flags. */
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if (event_flags_uart & (UART_CB_RX_BREAK))
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{
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printf("\r\n RX Break sequence detected.\r\n");
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event_flags_uart = event_flags_uart & (~(UART_CB_RX_BREAK));
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}
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if (event_flags_uart & (UART_CB_RX_FRAMING_ERROR))
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{
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printf("\r\n RX Framing Error.\r\n");
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event_flags_uart = event_flags_uart & (~(UART_CB_RX_FRAMING_ERROR));
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}
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if (event_flags_uart & (UART_CB_RX_PARITY_ERROR))
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{
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printf("\r\n RX Parity Error.\r\n");
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event_flags_uart = event_flags_uart & (~(UART_CB_RX_PARITY_ERROR));
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}
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if (event_flags_uart & (UART_CB_RX_OVERFLOW))
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{
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printf("\r\n RX Overflow Error.\r\n");
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event_flags_uart = event_flags_uart & (~(UART_CB_RX_OVERFLOW));
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}
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}
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if (event_flags_uart & (UART_CB_RX_EVENT))
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{
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/* Write byte(s) to UART - again, set event flag before UART call */
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event_flags_uart &= ~UART_CB_TX_EVENT;
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if (cmd == 13)
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{
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/* received 'Enter', send back "Hello World!". */
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ret = USARTdrv->Send("\r\nHello World!\r\n", 16);
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}
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else
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{
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/* else send back received character. */
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ret = USARTdrv->Send(&cmd, 1);
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}
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/* wait for event flag after UART call */
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while(!(event_flags_uart & (UART_CB_TX_EVENT)));
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}
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}
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error_poweroff:
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/* Received error Power off UART peripheral */
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ret = USARTdrv->PowerControl(ARM_POWER_OFF);
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if(ret != ARM_DRIVER_OK)
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{
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printf("\r\n Error in UART Power OFF.\r\n");
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}
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error_uninitialize:
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/* Received error Un-initialize UART driver */
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ret = USARTdrv->Uninitialize();
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if(ret != ARM_DRIVER_OK)
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{
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printf("\r\n Error in UART Uninitialize.\r\n");
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}
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#if (RTE_UART2_CLK_SOURCE == 0) /* CLK_38.4MHz */
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/* disable the HFOSC clock */
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error_code = SERVICES_clocks_enable_clock(se_services_s_handle,
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/*clock_enable_t*/ CLKEN_HFOSC,
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/*bool enable */ false,
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&service_error_code);
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if(error_code)
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printf("SE: clk enable = %d\n", error_code);
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#endif
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printf("\r\n XXX UART demo thread exiting XXX...\r\n");
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}
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/* Define main entry point */
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int main()
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{
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#if defined(RTE_Compiler_IO_STDOUT_User)
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int32_t ret;
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ret = stdout_init();
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if(ret != ARM_DRIVER_OK)
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{
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while(1)
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{
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}
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}
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#endif
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myUART_Thread_entry();
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}
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/************************ (C) COPYRIGHT ALIF SEMICONDUCTOR *****END OF FILE****/
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