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https://github.com/openmv/openmv.git
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358 lines
9.6 KiB
C
358 lines
9.6 KiB
C
/* Copyright (C) 2023 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 LPSPI_SPI_baremetal.c
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* @author Manoj A Murudi
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* @email manoj.murudi@alifsemi.com
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* @version V1.0.0
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* @date 29-May-2023
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* @brief baremetal demo application for LPSPI and SPI0.
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* - Data transfer between LPSPI(master) and SPI0(slave).
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* @bug None.
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* @Note Demo application will work only on M55-HE core.
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******************************************************************************/
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#include <stdio.h>
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#include "Driver_SPI.h"
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#include "pinconf.h"
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#include "Driver_GPIO.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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#if !defined(M55_HE)
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#error "This Demo application works only on M55_HE"
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#endif
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/* Use below macro to specify transfer type
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* 1 - Uses SPI Transfer function
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* 0 - Uses SPI Send & Receive function
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* */
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#define DATA_TRANSFER_TYPE 1
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#define LPSPI LP /* LPSPI instance */
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#define SPI0 0 /* SPI0 instance */
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#define GPIO7 7 /* GPIO instance to config flexio Port 4 pins */
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volatile uint8_t lpspi_cb_status = 0;
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volatile uint8_t spi0_cb_status = 0;
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extern ARM_DRIVER_SPI ARM_Driver_SPI_(LPSPI);
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ARM_DRIVER_SPI *ptrLPSPI = &ARM_Driver_SPI_(LPSPI);
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extern ARM_DRIVER_SPI ARM_Driver_SPI_(SPI0);
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ARM_DRIVER_SPI *ptrSPI0 = &ARM_Driver_SPI_(SPI0);
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extern ARM_DRIVER_GPIO ARM_Driver_GPIO_(GPIO7);
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ARM_DRIVER_GPIO *gpioDrv7 = &ARM_Driver_GPIO_(GPIO7);
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/**
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* @fn static int32_t pinmux_config(void)
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* @brief LPSPI & SPI0 pinmux configuration.
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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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static int32_t pinmux_config(void)
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{
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int32_t ret;
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/* pinmux configurations for LPSPI pins (using A version pins) */
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ret = pinconf_set(PORT_7, PIN_4, PINMUX_ALTERNATE_FUNCTION_4, PADCTRL_READ_ENABLE);
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if (ret)
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{
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printf("ERROR: Failed to configure PINMUX for LPSPI_MISO_PIN\n");
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return ret;
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}
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ret = pinconf_set(PORT_7, PIN_5, PINMUX_ALTERNATE_FUNCTION_5, 0);
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if (ret)
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{
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printf("ERROR: Failed to configure PINMUX for LPSPI_MOSI_PIN\n");
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return ret;
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}
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ret = pinconf_set(PORT_7, PIN_6, PINMUX_ALTERNATE_FUNCTION_5, 0);
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if (ret)
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{
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printf("ERROR: Failed to configure PINMUX for LPSPI_CLK_PIN\n");
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return ret;
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}
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ret = pinconf_set(PORT_7, PIN_7, PINMUX_ALTERNATE_FUNCTION_5, 0);
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if (ret)
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{
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printf("ERROR: Failed to configure PINMUX for LPSPI_SS_PIN\n");
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return ret;
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}
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/* pinmux configurations for SPI0 pins (using B version pins) */
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ret = pinconf_set(PORT_5, PIN_0, PINMUX_ALTERNATE_FUNCTION_4, 0);
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if (ret)
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{
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printf("ERROR: Failed to configure PINMUX for SPI0_MISO_PIN\n");
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return ret;
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}
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ret = pinconf_set(PORT_5, PIN_1, PINMUX_ALTERNATE_FUNCTION_4, PADCTRL_READ_ENABLE);
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if (ret)
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{
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printf("ERROR: Failed to configure PINMUX for SPI0_MOSI_PIN\n");
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return ret;
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}
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ret = pinconf_set(PORT_5, PIN_3, PINMUX_ALTERNATE_FUNCTION_3, PADCTRL_READ_ENABLE);
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if (ret)
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{
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printf("ERROR: Failed to configure PINMUX for SPI0_CLK_PIN\n");
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return ret;
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}
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ret = pinconf_set(PORT_5, PIN_2, PINMUX_ALTERNATE_FUNCTION_4, PADCTRL_READ_ENABLE);
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if (ret)
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{
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printf("ERROR: Failed to configure PINMUX for SPI0_SS_PIN\n");
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return ret;
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}
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return ret;
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}
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/**
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* @fn void LPSPI_cb_func (uint32_t event)
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* @brief LPSPI callback function.
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* @note none.
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* @param event: SPI event.
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* @retval none.
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*/
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static void LPSPI_cb_func (uint32_t event)
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{
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if (event == ARM_SPI_EVENT_TRANSFER_COMPLETE)
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{
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lpspi_cb_status = 1;
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}
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}
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/**
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* @fn void SPI0_cb_func (uint32_t event)
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* @brief SPI0 callback function.
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* @note none.
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* @param event: SPI event.
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* @retval none.
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*/
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static void SPI0_cb_func (uint32_t event)
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{
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if (event == ARM_SPI_EVENT_TRANSFER_COMPLETE)
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{
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spi0_cb_status = 1;
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}
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}
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/**
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* @fn void lpspi_spi0_transfer(void)
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* @brief demo application function for data transfer.
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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 lpspi_spi0_transfer(void)
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{
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uint32_t lpspi_tx_buff, spi0_rx_buff = 0;
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int32_t ret = ARM_DRIVER_OK;
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uint32_t lpspi_control, spi0_control;
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uint32_t arg = ARM_GPIO_FLEXIO_VOLT_1V8;
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#if DATA_TRANSFER_TYPE
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uint32_t spi0_tx_buff, lpspi_rx_buff = 0;
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#endif
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/*
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* H/W connections on devkit:
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* short LPSPI MISO (P7_4 -> J12-27 pin) and SPI0 MISO (P5_0 -> J12-13 pin).
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* short LPSPI MOSI (P7_5 -> J15-9 pin) and SPI0 MOSI (P5_1 -> J12-15 pin).
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* short LPSPI SCLK (P7_6 -> J15-8 pin) and SPI0 SCLK (P5_3 -> J14-5 pin).
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* short LPSPI SS (P7_7 -> J15-10 pin) and SPI0 SS (P5_2 -> J12-17 pin).
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* */
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printf("*** Demo app using SPI0 & LPSPI is starting ***\n");
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ret = pinmux_config();
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if (ret)
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{
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printf("Error in pinmux configuration\n");
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return;
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}
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/* config any of the LPSPI pins (flexio) to 1.8V */
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ret = gpioDrv7->Initialize(PIN_4, NULL);
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if ((ret != ARM_DRIVER_OK)) {
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printf("ERROR: Failed to power off \n");
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}
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ret = gpioDrv7->PowerControl(PIN_4, ARM_POWER_FULL);
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if ((ret != ARM_DRIVER_OK)) {
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printf("ERROR: Failed to power off \n");
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}
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ret = gpioDrv7->Control(PIN_4, ARM_GPIO_CONFIG_FLEXIO, &arg);
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if ((ret != ARM_DRIVER_OK)) {
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printf("ERROR: Failed to power off \n");
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}
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/* LPSPI Configuration as master */
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ret = ptrLPSPI->Initialize(LPSPI_cb_func);
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if (ret != ARM_DRIVER_OK)
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{
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printf("ERROR: Failed to initialize the LPSPI\n");
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return;
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}
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ret = ptrLPSPI->PowerControl(ARM_POWER_FULL);
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if (ret != ARM_DRIVER_OK)
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{
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printf("ERROR: Failed to power LPSPI\n");
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goto error_lpspi_uninitialize;
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}
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lpspi_control = (ARM_SPI_MODE_MASTER | ARM_SPI_SS_MASTER_HW_OUTPUT | ARM_SPI_CPOL0_CPHA0 | ARM_SPI_DATA_BITS(32));
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/* Baudrate is 1MHz */
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ret = ptrLPSPI->Control(lpspi_control, 1000000);
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if (ret != ARM_DRIVER_OK)
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{
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printf("ERROR: Failed to configure LPSPI\n");
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goto error_lpspi_power_off;
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}
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/* SPI0 Configuration as slave */
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ret = ptrSPI0->Initialize(SPI0_cb_func);
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if (ret != ARM_DRIVER_OK)
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{
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printf("ERROR: Failed to initialize the SPI0\n");
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goto error_lpspi_power_off;
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}
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ret = ptrSPI0->PowerControl(ARM_POWER_FULL);
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if (ret != ARM_DRIVER_OK)
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{
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printf("ERROR: Failed to power SPI0\n");
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goto error_spi0_uninitialize;
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}
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spi0_control = (ARM_SPI_MODE_SLAVE | ARM_SPI_CPOL0_CPHA0 | ARM_SPI_DATA_BITS(32));
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ret = ptrSPI0->Control(spi0_control, NULL);
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if (ret != ARM_DRIVER_OK)
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{
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printf("ERROR: Failed to configure SPI0\n");
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goto error_spi0_power_off;
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}
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ret = ptrLPSPI->Control(ARM_SPI_CONTROL_SS, ARM_SPI_SS_ACTIVE);
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if (ret != ARM_DRIVER_OK)
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{
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printf("ERROR: Failed to enable the slave select of LPSPI\n");
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goto error_spi0_power_off;
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}
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#if DATA_TRANSFER_TYPE
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lpspi_tx_buff = 0xAAAAAAAA;
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spi0_tx_buff = 0x55555555;
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ret = ptrSPI0->Transfer(&spi0_tx_buff, &spi0_rx_buff, 1);
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if (ret != ARM_DRIVER_OK)
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{
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printf("ERROR: Failed SPI0 to configure as tx_rx\n");
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goto error_spi0_power_off;
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}
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ret = ptrLPSPI->Transfer(&lpspi_tx_buff, &lpspi_rx_buff, 1);
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if (ret != ARM_DRIVER_OK)
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{
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printf("ERROR: LPSPI Failed to configure as tx_rx\n");
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goto error_spi0_power_off;
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}
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#else
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lpspi_tx_buff = 0x12345678;
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ret = ptrSPI0->Receive(&spi0_rx_buff, 1);
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if (ret != ARM_DRIVER_OK)
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{
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printf("ERROR: SPI0 Failed to configure as receive only\n");
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goto error_spi0_power_off;
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}
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ret = ptrLPSPI->Send(&lpspi_tx_buff, 1);
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if (ret != ARM_DRIVER_OK)
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{
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printf("ERROR: LPSPI Failed to configure as send only\n");
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goto error_spi0_power_off;
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}
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#endif
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while(1)
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{
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if (lpspi_cb_status && spi0_cb_status)
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{
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lpspi_cb_status = 0;
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spi0_cb_status = 0;
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break;
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}
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}
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while (!((ptrLPSPI->GetStatus().busy == 0) && (ptrSPI0->GetStatus().busy == 0)));
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printf("Data Transfer completed\n");
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printf("SPI0 received value 0x%x\n", spi0_rx_buff);
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#if DATA_TRANSFER_TYPE
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printf("LPSPI received value 0x%x\n", lpspi_rx_buff);
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#endif
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error_spi0_power_off :
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ret = ptrSPI0->PowerControl(ARM_POWER_OFF);
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if (ret != ARM_DRIVER_OK)
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{
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printf("Failed to Power off SPI0\n");
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}
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error_spi0_uninitialize :
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ret = ptrSPI0->Uninitialize();
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if (ret != ARM_DRIVER_OK)
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{
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printf("Failed to Un-Initialized SPI0\n");
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}
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error_lpspi_power_off :
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ret = ptrLPSPI->PowerControl(ARM_POWER_OFF);
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if (ret != ARM_DRIVER_OK)
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{
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printf("Failed to Power off LPSPI\n");
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}
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error_lpspi_uninitialize :
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ret = ptrLPSPI->Uninitialize();
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if (ret != ARM_DRIVER_OK)
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{
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printf("Failed to Un-Initialized LPSPI\n");
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}
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printf("*** Demo app using SPI0 & LPSPI is ended ***\n");
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}
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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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lpspi_spi0_transfer();
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}
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