mirror of
https://github.com/openmv/openmv.git
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389 lines
11 KiB
C
389 lines
11 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 i2c_baremetal.c
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* @brief Baremetal demo application to verify I2C Master and
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* Slave functionality without any operating system
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*
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* Code will verify below cases:
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* 1) Master transmit 30 bytes and Slave receive 30 bytes
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* 2) Slave transmit 29 bytes and Master receive 29 bytes
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* I2C1 instance is taken as Master (PIN used P7_2 and P7_3)
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* I2C0 instance is taken as Slave (PIN used P0_2 and P0_3)
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*
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* Hardware setup:
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* - Connecting GPIO pins of I2C1 TO I2C0
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* SDA pin P7_2(J15) to P0_2(J11)
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* SCL pin P7_3(J15) to P0_3(J11).
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* @bug None.
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* @Note None.
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******************************************************************************/
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#include <stdio.h>
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#include <string.h>
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#include "RTE_Components.h"
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#include CMSIS_device_header
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#include "Driver_I2C.h"
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#include "pinconf.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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#define ADDRESS_MODE_7BIT 1 /* I2C 7 bit addressing mode */
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#define ADDRESS_MODE_10BIT 2 /* I2C 10 bit addressing mode */
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#define ADDRESS_MODE ADDRESS_MODE_7BIT /* 10 bit addressing mode chosen */
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/* I2C Driver instance */
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extern ARM_DRIVER_I2C Driver_I2C1;
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static ARM_DRIVER_I2C *I2C_MstDrv = &Driver_I2C1;
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extern ARM_DRIVER_I2C Driver_I2C0;
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static ARM_DRIVER_I2C *I2C_SlvDrv = &Driver_I2C0;
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static volatile uint32_t mst_cb_status = 0;
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static volatile uint32_t slv_cb_status = 0;
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#if (ADDRESS_MODE == ADDRESS_MODE_10BIT)
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#define TAR_ADDRS (0X2D0) /* 10 bit Target(Slave) Address, use by Master */
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#define SAR_ADDRS (0X2D0) /* 10 bit Slave Own Address, use by Slave */
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#else
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#define TAR_ADDRS (0X40) /* 7 bit Target(Slave) Address, use by Master */
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#define SAR_ADDRS (0X40) /* 7 bit Slave Own Address, use by Slave */
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#endif
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#define STOP (0X00)
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/* master transmit and slave receive */
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#define MST_BYTE_TO_TRANSMIT 30
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/* slave transmit and master receive */
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#define SLV_BYTE_TO_TRANSMIT 29
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/* Master parameter set */
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/* Master TX Data (Any random value). */
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static uint8_t MST_TX_BUF[MST_BYTE_TO_TRANSMIT] =
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{
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"!*!Test Message from Master!*!"
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};
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/* master receive buffer */
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static uint8_t MST_RX_BUF[SLV_BYTE_TO_TRANSMIT];
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/* Master parameter set END */
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/* Slave parameter set */
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/* slave receive buffer */
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static uint8_t SLV_RX_BUF[MST_BYTE_TO_TRANSMIT];
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/* Slave TX Data (Any random value). */
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static uint8_t SLV_TX_BUF[SLV_BYTE_TO_TRANSMIT] =
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{
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"!*!Test Message from Slave!*!"
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};
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/* Slave parameter set END */
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typedef enum _I2C_CB_EVENT{
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I2C_CB_EVENT_TRANSFER_DONE = (1 << 0),
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I2C_CB_EVENT_ADDRESS_NACK = (1 << 1),
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I2C_CB_EVENT_TRANSFER_INCOMPLETE = (1 << 2)
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}I2C_CB_EVENT;
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static void i2c_mst_conversion_callback(uint32_t event)
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{
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if (event & ARM_I2C_EVENT_TRANSFER_DONE)
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{
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/* Transfer or receive is finished */
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mst_cb_status |= I2C_CB_EVENT_TRANSFER_DONE;
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}
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if (event & ARM_I2C_EVENT_ADDRESS_NACK)
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{
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/* Address NACKED */
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mst_cb_status |= I2C_CB_EVENT_ADDRESS_NACK;
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}
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if (event & ARM_I2C_EVENT_TRANSFER_INCOMPLETE)
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{
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/* Transfer or receive is incomplete */
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mst_cb_status |= I2C_CB_EVENT_TRANSFER_INCOMPLETE;
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}
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}
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static void i2c_slv_conversion_callback(uint32_t event)
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{
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if (event & ARM_I2C_EVENT_TRANSFER_DONE)
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{
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/* Transfer or receive is finished */
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slv_cb_status = I2C_CB_EVENT_TRANSFER_DONE;
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}
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}
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/* Pinmux for B0 */
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extern void hardware_init(void);
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void hardware_init(void)
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{
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/* I2C0_SDA_A */
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pinconf_set(PORT_0, PIN_2, PINMUX_ALTERNATE_FUNCTION_3,
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(PADCTRL_READ_ENABLE | PADCTRL_DRIVER_DISABLED_PULL_UP));
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/* I2C0_SCL_A */
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pinconf_set(PORT_0, PIN_3, PINMUX_ALTERNATE_FUNCTION_3,
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(PADCTRL_READ_ENABLE | PADCTRL_DRIVER_DISABLED_PULL_UP));
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/* I2C1_SDA_C */
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pinconf_set(PORT_7, PIN_2, PINMUX_ALTERNATE_FUNCTION_5,
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(PADCTRL_READ_ENABLE | PADCTRL_DRIVER_DISABLED_PULL_UP));
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/* I2C1_SCL_C */
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pinconf_set(PORT_7, PIN_3, PINMUX_ALTERNATE_FUNCTION_5,
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(PADCTRL_READ_ENABLE | PADCTRL_DRIVER_DISABLED_PULL_UP));
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}
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extern void I2C_demo(void);
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void I2C_demo(void)
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{
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int ret = 0;
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ARM_DRIVER_VERSION version;
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printf("\r\n >>> I2C demo starting up!!! <<< \r\n");
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/* Pinmux */
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hardware_init();
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version = I2C_MstDrv->GetVersion();
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printf("\r\n I2C version api:0x%X driver:0x%X...\r\n",version.api, version.drv);
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/* Initialize Master I2C driver */
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ret = I2C_MstDrv->Initialize(i2c_mst_conversion_callback);
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if (ret != ARM_DRIVER_OK)
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{
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printf("\r\n Error: I2C master init failed\n");
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return;
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}
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/* Initialize Slave I2C driver */
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ret = I2C_SlvDrv->Initialize(i2c_slv_conversion_callback);
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if (ret != ARM_DRIVER_OK)
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{
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printf("\r\n Error: I2C slave init failed\n");
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return;
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}
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/* I2C Master Power control */
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ret = I2C_MstDrv->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: I2C Master Power up failed\n");
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goto error_uninitialize;
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}
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/* I2C Slave Power control */
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ret = I2C_SlvDrv->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: I2C Slave Power up failed\n");
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goto error_uninitialize;
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}
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/* I2C Master Control */
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ret = I2C_MstDrv->Control(ARM_I2C_BUS_SPEED, ARM_I2C_BUS_SPEED_FAST_PLUS);
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if (ret != ARM_DRIVER_OK)
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{
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printf("\r\n Error: I2C master control failed\n");
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goto error_poweroff;
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}
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/* I2C Slave Control */
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#if (ADDRESS_MODE == ADDRESS_MODE_10BIT)
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ret = I2C_SlvDrv->Control(ARM_I2C_OWN_ADDRESS, (SAR_ADDRS | ARM_I2C_ADDRESS_10BIT));
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#else
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ret = I2C_SlvDrv->Control(ARM_I2C_OWN_ADDRESS, SAR_ADDRS);
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#endif
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if (ret != ARM_DRIVER_OK)
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{
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printf("\r\n Error: I2C slave control failed\n");
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goto error_uninitialize;
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}
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printf("\n----------------Master transmit/slave receive-----------------------\n");
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/* Clear mst/slv cb_status */
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mst_cb_status = 0;
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slv_cb_status = 0;
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/* I2C Slave Receive */
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ret = I2C_SlvDrv->SlaveReceive(SLV_RX_BUF, MST_BYTE_TO_TRANSMIT);
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if (ret != ARM_DRIVER_OK)
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{
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printf("\r\n Error: I2C Slave Receive failed\n");
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goto error_uninitialize;
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}
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/* delay */
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sys_busy_loop_us(500);
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/* I2C Master Transmit*/
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#if (ADDRESS_MODE == ADDRESS_MODE_10BIT)
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I2C_MstDrv->MasterTransmit((TAR_ADDRS | ARM_I2C_ADDRESS_10BIT), MST_TX_BUF, MST_BYTE_TO_TRANSMIT, STOP);
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#else
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I2C_MstDrv->MasterTransmit(TAR_ADDRS, MST_TX_BUF, MST_BYTE_TO_TRANSMIT, STOP);
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#endif
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if (ret != ARM_DRIVER_OK)
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{
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printf("\r\n Error: I2C Master Transmit failed\n");
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goto error_uninitialize;
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}
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/* wait for master/slave callback. */
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while(mst_cb_status == 0);
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if (mst_cb_status & I2C_CB_EVENT_ADDRESS_NACK)
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{
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printf("\r\n Error: Slave NACKED\n");
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goto error_uninitialize;
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}
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else if (mst_cb_status & I2C_CB_EVENT_TRANSFER_INCOMPLETE)
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{
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printf("\r\n Error: Transfer incomplete\n");
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goto error_uninitialize;
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}
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while(slv_cb_status == 0);
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/* Compare received data. */
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if (memcmp(&SLV_RX_BUF, &MST_TX_BUF, MST_BYTE_TO_TRANSMIT))
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{
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printf("\n Error: Master transmit/slave receive failed \n");
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printf("\n ---Stop--- \r\n wait forever >>> \n");
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while(1);
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}
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printf("\n----------------Master receive/slave transmit-----------------------\n");
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/* Clear mst/slv cb_status */
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mst_cb_status = 0;
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slv_cb_status = 0;
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/* I2C Master Receive */
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#if (ADDRESS_MODE == ADDRESS_MODE_10BIT)
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ret = I2C_MstDrv->MasterReceive((TAR_ADDRS | ARM_I2C_ADDRESS_10BIT), MST_RX_BUF, SLV_BYTE_TO_TRANSMIT, STOP);
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#else
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ret = I2C_MstDrv->MasterReceive(TAR_ADDRS, MST_RX_BUF, SLV_BYTE_TO_TRANSMIT, STOP);
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#endif
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if (ret != ARM_DRIVER_OK)
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{
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printf("\r\n Error: I2C Master Receive failed\n");
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goto error_uninitialize;
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}
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/* I2C Slave Transmit */
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I2C_SlvDrv->SlaveTransmit(SLV_TX_BUF, SLV_BYTE_TO_TRANSMIT);
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if (ret != ARM_DRIVER_OK)
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{
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printf("\r\n Error: I2C Slave Transmit failed\n");
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goto error_uninitialize;
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}
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/* wait for master/slave callback. */
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while(mst_cb_status == 0);
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/* Slave Address NACKED */
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if (mst_cb_status & I2C_CB_EVENT_ADDRESS_NACK)
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{
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printf("\r\n Error: Slave NACKED\n");
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goto error_uninitialize;
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}
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else if (mst_cb_status & I2C_CB_EVENT_TRANSFER_INCOMPLETE) /* Transfer incomplete */
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{
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printf("\r\n Error: Transfer incomplete\n");
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goto error_uninitialize;
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}
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while(slv_cb_status == 0);
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/* Compare received data. */
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if(memcmp(&SLV_TX_BUF, &MST_RX_BUF, SLV_BYTE_TO_TRANSMIT))
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{
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printf("\n Error: Master receive/slave transmit failed\n");
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printf("\n ---Stop--- \r\n wait forever >>> \n");
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while(1);
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}
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ret =I2C_MstDrv->Uninitialize();
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if (ret == ARM_DRIVER_OK)
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{
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printf("\r\n I2C Master Uninitialized\n");
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goto error_uninitialize;
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}
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ret =I2C_SlvDrv->Uninitialize();
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if (ret == ARM_DRIVER_OK)
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{
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printf("\r\n I2C Slave Uninitialized\n");
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goto error_uninitialize;
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}
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printf("\n >>> I2C conversion completed without any error <<< \n");
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printf("\n ---END--- \r\n wait forever >>> \n");
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while(1);
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error_poweroff:
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/* Power off I2C peripheral */
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ret = I2C_MstDrv->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: I2C Master Power OFF failed.\r\n");
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}
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ret = I2C_SlvDrv->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: I2C Slave Power OFF failed.\r\n");
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}
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error_uninitialize:
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/* Un-initialize I2C driver */
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ret = I2C_MstDrv->Uninitialize();
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if(ret == ARM_DRIVER_OK)
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{
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printf("\r\n I2C Master Uninitialize\r\n");
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}
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ret = I2C_SlvDrv->Uninitialize();
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if(ret == ARM_DRIVER_OK)
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{
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printf("\r\n I2C Slave Uninitialize\r\n");
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}
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printf("\r\n I2C demo thread exiting...\r\n");
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}
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int main (void)
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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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I2C_demo();
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while(1);
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}
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