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/**
*********************************************************************************************************
* Copyright(c) 2018, Realtek Semiconductor Corporation. All rights reserved.
**********************************************************************************************************
* @file main.c
* @brief IIC demo GDMA master tx slave rx.
* @details
* @author echo
* @date 2021-05-27
* @version v0.1
*********************************************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include <stdlib.h>
#include <string.h>
#include "rtl876x_nvic.h"
#include "rtl876x_pinmux.h"
#include "rtl876x_gdma.h"
#include "rtl876x_rcc.h"
#include "rtl876x_i2c.h"
#include "trace.h"
/* Defines ------------------------------------------------------------------*/
/* I2C pin define*/
#define I2C_MASTER_SCL_PIN I2C0_SCL_PIN
#define I2C_MASTER_SDA_PIN I2C0_SDA_PIN
#define I2C_SLAVER_SCL_PIN I2C1_SCL_PIN
#define I2C_SLAVE_SDA_PIN I2C1_SDA_PIN
#define I2C0_SCL_PIN P4_0
#define I2C0_SDA_PIN P4_1
#define I2C1_SCL_PIN P4_2
#define I2C1_SDA_PIN P4_3
#define I2C0_GDMA_CHANNEL_NUM 0
#define I2C0_GDMA_Channel GDMA_Channel0
#define I2C0_GDMA_Channel_IRQn GDMA0_Channel0_IRQn
#define I2C0_GDMA_Channel_Handler GDMA0_Channel0_Handler
#define I2C1_GDMA_CHANNEL_NUM 1
#define I2C1_GDMA_Channel GDMA_Channel1
#define I2C1_GDMA_Channel_IRQn GDMA0_Channel1_IRQn
#define I2C1_GDMA_Channel_Handler GDMA0_Channel1_Handler
#define I2C0_READ_CMD_GDMA_CHANNEL_NUM 2
#define I2C0_READ_CMD_GDMA_Channel GDMA_Channel2
#define I2C0_READ_CMD_GDMA_Channel_IRQn GDMA0_Channel2_IRQn
#define I2C0_READ_CMD_GDMA_Channel_Handler GDMA0_Channel2_Handler
#define GDMA_TRANSFER_SIZE 200
/* Globals ------------------------------------------------------------------*/
uint16_t GDMA_I2C_Send_Buf[GDMA_TRANSFER_SIZE];
uint8_t GDMA_I2C_Recv_Buf[GDMA_TRANSFER_SIZE];
uint32_t GDMA_I2C_Tx_Read_Buf[GDMA_TRANSFER_SIZE];
/**
* @brief Initialization of pinmux settings and pad settings.
* @param No parameter.
* @return void
*/
void board_i2c_master_init(void)
{
Pad_Config(I2C_MASTER_SCL_PIN, PAD_PINMUX_MODE, PAD_IS_PWRON, PAD_PULL_UP, PAD_OUT_ENABLE,
PAD_OUT_HIGH);
Pad_Config(I2C_MASTER_SDA_PIN, PAD_PINMUX_MODE, PAD_IS_PWRON, PAD_PULL_UP, PAD_OUT_ENABLE,
PAD_OUT_HIGH);
Pinmux_Config(I2C_MASTER_SCL_PIN, I2C0_CLK);
Pinmux_Config(I2C_MASTER_SDA_PIN, I2C0_DAT);
}
/**
* @brief Initialization of pinmux settings and pad settings.
* @param No parameter.
* @return void
*/
void board_i2c_slave_init(void)
{
Pad_Config(I2C_SLAVER_SCL_PIN, PAD_PINMUX_MODE, PAD_IS_PWRON, PAD_PULL_UP, PAD_OUT_ENABLE,
PAD_OUT_HIGH);
Pad_Config(I2C_SLAVE_SDA_PIN, PAD_PINMUX_MODE, PAD_IS_PWRON, PAD_PULL_UP, PAD_OUT_ENABLE,
PAD_OUT_HIGH);
Pinmux_Config(I2C_SLAVER_SCL_PIN, I2C1_CLK);
Pinmux_Config(I2C_SLAVE_SDA_PIN, I2C1_DAT);
}
/**
* @brief Initialize I2C Master peripheral.
* @param No parameter.
* @return void
*/
void driver_i2c_master_init(void)
{
/* Initialize I2C peripheral */
RCC_PeriphClockCmd(APBPeriph_I2C0, APBPeriph_I2C0_CLOCK, ENABLE);
I2C_InitTypeDef I2C_InitStruct;
I2C_StructInit(&I2C_InitStruct);
I2C_InitStruct.I2C_ClockSpeed = 100000;
I2C_InitStruct.I2C_DeviveMode = I2C_DeviveMode_Master;
I2C_InitStruct.I2C_AddressMode = I2C_AddressMode_7BIT;
I2C_InitStruct.I2C_SlaveAddress = 0x50;
I2C_InitStruct.I2C_Ack = I2C_Ack_Enable;
I2C_InitStruct.I2C_RxDmaEn = ENABLE;
I2C_InitStruct.I2C_TxDmaEn = ENABLE;
I2C_InitStruct.I2C_RxWaterlevel = 3;
I2C_InitStruct.I2C_TxWaterlevel = 22;
I2C_Init(I2C0, &I2C_InitStruct);
I2C_Cmd(I2C0, ENABLE);
}
/**
* @brief Initialize I2C Slave peripheral.
* @param No parameter.
* @return void
*/
void driver_i2c_slave_init(void)
{
/* Initialize I2C peripheral */
RCC_PeriphClockCmd(APBPeriph_I2C1, APBPeriph_I2C1_CLOCK, ENABLE);
I2C_InitTypeDef I2C_InitStruct;
I2C_StructInit(&I2C_InitStruct);
I2C_InitStruct.I2C_ClockSpeed = 100000;
I2C_InitStruct.I2C_DeviveMode = I2C_DeviveMode_Slave;
I2C_InitStruct.I2C_AddressMode = I2C_AddressMode_7BIT;
I2C_InitStruct.I2C_SlaveAddress = 0x50;
I2C_InitStruct.I2C_Ack = I2C_Ack_Enable;
I2C_InitStruct.I2C_TxDmaEn = ENABLE;
I2C_InitStruct.I2C_TxWaterlevel = 16;
I2C_Init(I2C1, &I2C_InitStruct);
NVIC_InitTypeDef NVIC_InitStruct;
NVIC_InitStruct.NVIC_IRQChannel = I2C1_IRQn;
NVIC_InitStruct.NVIC_IRQChannelCmd = (FunctionalState)ENABLE;
NVIC_InitStruct.NVIC_IRQChannelPriority = 3;
NVIC_Init(&NVIC_InitStruct);
/* Configure interrupt type, please reference to i2c document about all interrupt type description */
I2C_INTConfig(I2C1, I2C_INT_RD_REQ, ENABLE);
I2C_Cmd(I2C1, ENABLE);
}
/**
* @brief Initialize gdma peripheral.
* @param No parameter.
* @return void
*/
void gdma_i2c_slave_tx_init(void)
{
/* Initialize data buffer */
for (uint32_t i = 0; i < GDMA_TRANSFER_SIZE; i++)
{
GDMA_I2C_Send_Buf[i] = i;
}
RCC_PeriphClockCmd(APBPeriph_GDMA, APBPeriph_GDMA_CLOCK, ENABLE);
/* GDMA init */
GDMA_InitTypeDef GDMA_InitStruct;
GDMA_StructInit(&GDMA_InitStruct);
GDMA_InitStruct.GDMA_ChannelNum = I2C1_GDMA_CHANNEL_NUM;
GDMA_InitStruct.GDMA_DIR = GDMA_DIR_MemoryToPeripheral;
GDMA_InitStruct.GDMA_BufferSize = GDMA_TRANSFER_SIZE;
GDMA_InitStruct.GDMA_SourceInc = DMA_SourceInc_Inc;
GDMA_InitStruct.GDMA_DestinationInc = DMA_DestinationInc_Fix;
GDMA_InitStruct.GDMA_SourceDataSize = GDMA_DataSize_HalfWord;
GDMA_InitStruct.GDMA_DestinationDataSize = GDMA_DataSize_HalfWord;
GDMA_InitStruct.GDMA_SourceMsize = GDMA_Msize_4;
GDMA_InitStruct.GDMA_DestinationMsize = GDMA_Msize_4;
GDMA_InitStruct.GDMA_SourceAddr = (uint32_t)GDMA_I2C_Send_Buf;
GDMA_InitStruct.GDMA_DestinationAddr = (uint32_t)(&(I2C1->IC_DATA_CMD));
GDMA_InitStruct.GDMA_DestHandshake = GDMA_Handshake_I2C1_TX;
GDMA_Init(I2C1_GDMA_Channel, &GDMA_InitStruct);
/* GDMA irq config */
NVIC_InitTypeDef NVIC_InitStruct;
NVIC_InitStruct.NVIC_IRQChannel = I2C1_GDMA_Channel_IRQn;
NVIC_InitStruct.NVIC_IRQChannelCmd = (FunctionalState)ENABLE;
NVIC_InitStruct.NVIC_IRQChannelPriority = 3;
NVIC_Init(&NVIC_InitStruct);
GDMA_INTConfig(I2C1_GDMA_CHANNEL_NUM, GDMA_INT_Transfer, ENABLE);
}
/**
* @brief Initialize gdma peripheral.
* @param No parameter.
* @return void
*/
void gdma_i2c_master_rx_init(void)
{
/* Initialize data buffer */
for (uint32_t i = 0; i < GDMA_TRANSFER_SIZE; i++)
{
GDMA_I2C_Recv_Buf[i] = 0;
}
RCC_PeriphClockCmd(APBPeriph_GDMA, APBPeriph_GDMA_CLOCK, ENABLE);
/* GDMA init */
GDMA_InitTypeDef GDMA_InitStruct;
GDMA_StructInit(&GDMA_InitStruct);
GDMA_InitStruct.GDMA_ChannelNum = I2C0_GDMA_CHANNEL_NUM;
GDMA_InitStruct.GDMA_DIR = GDMA_DIR_PeripheralToMemory;
GDMA_InitStruct.GDMA_BufferSize = GDMA_TRANSFER_SIZE;
GDMA_InitStruct.GDMA_SourceInc = DMA_SourceInc_Fix;
GDMA_InitStruct.GDMA_DestinationInc = DMA_DestinationInc_Inc;
GDMA_InitStruct.GDMA_SourceDataSize = GDMA_DataSize_Byte;
GDMA_InitStruct.GDMA_DestinationDataSize = GDMA_DataSize_Byte;
GDMA_InitStruct.GDMA_SourceMsize = GDMA_Msize_1;
GDMA_InitStruct.GDMA_DestinationMsize = GDMA_Msize_1;
GDMA_InitStruct.GDMA_SourceAddr = (uint32_t)(&(I2C0->IC_DATA_CMD));
GDMA_InitStruct.GDMA_DestinationAddr = (uint32_t)(GDMA_I2C_Recv_Buf);
GDMA_InitStruct.GDMA_SourceHandshake = GDMA_Handshake_I2C0_RX;
GDMA_Init(I2C0_GDMA_Channel, &GDMA_InitStruct);
/* GDMA irq config */
NVIC_InitTypeDef NVIC_InitStruct;
NVIC_InitStruct.NVIC_IRQChannel = I2C0_GDMA_Channel_IRQn;
NVIC_InitStruct.NVIC_IRQChannelCmd = (FunctionalState)ENABLE;
NVIC_InitStruct.NVIC_IRQChannelPriority = 3;
NVIC_Init(&NVIC_InitStruct);
GDMA_INTConfig(I2C0_GDMA_CHANNEL_NUM, GDMA_INT_Transfer, ENABLE);
/* Start to receive data */
GDMA_Cmd(I2C0_GDMA_CHANNEL_NUM, ENABLE);
}
/**
* @brief Initialize gdma peripheral.
* @param No parameter.
* @return void
*/
void i2c_master_send_read_cmd(void)
{
/* Initialize data buffer */
for (uint32_t i = 0; i < (GDMA_TRANSFER_SIZE - 1); i++)
{
GDMA_I2C_Tx_Read_Buf[i] = (0x01 << 8);
}
GDMA_I2C_Tx_Read_Buf[GDMA_TRANSFER_SIZE - 1] = (0x03 << 8);
/* GDMA init */
GDMA_InitTypeDef GDMA_InitStruct;
GDMA_StructInit(&GDMA_InitStruct);
GDMA_InitStruct.GDMA_ChannelNum = I2C0_READ_CMD_GDMA_CHANNEL_NUM;
GDMA_InitStruct.GDMA_DIR = GDMA_DIR_MemoryToPeripheral;
GDMA_InitStruct.GDMA_BufferSize = GDMA_TRANSFER_SIZE;
GDMA_InitStruct.GDMA_SourceInc = DMA_SourceInc_Inc;
GDMA_InitStruct.GDMA_DestinationInc = DMA_DestinationInc_Fix;
GDMA_InitStruct.GDMA_SourceDataSize = GDMA_DataSize_Word;
GDMA_InitStruct.GDMA_DestinationDataSize = GDMA_DataSize_Word;
GDMA_InitStruct.GDMA_SourceMsize = GDMA_Msize_1;
GDMA_InitStruct.GDMA_DestinationMsize = GDMA_Msize_1;
GDMA_InitStruct.GDMA_SourceAddr = (uint32_t)GDMA_I2C_Tx_Read_Buf;
GDMA_InitStruct.GDMA_DestinationAddr = (uint32_t)(&(I2C0->IC_DATA_CMD));
GDMA_InitStruct.GDMA_DestHandshake = GDMA_Handshake_I2C0_TX;
GDMA_Init(I2C0_READ_CMD_GDMA_Channel, &GDMA_InitStruct);
/* GDMA irq config */
NVIC_InitTypeDef NVIC_InitStruct;
NVIC_InitStruct.NVIC_IRQChannel = I2C0_READ_CMD_GDMA_Channel_IRQn;
NVIC_InitStruct.NVIC_IRQChannelCmd = (FunctionalState)ENABLE;
NVIC_InitStruct.NVIC_IRQChannelPriority = 3;
NVIC_Init(&NVIC_InitStruct);
GDMA_INTConfig(I2C0_READ_CMD_GDMA_CHANNEL_NUM, GDMA_INT_Transfer, ENABLE);
GDMA_Cmd(I2C0_READ_CMD_GDMA_CHANNEL_NUM, ENABLE);
}
/**
* @brief Demo code of i2c.
* @param No parameter.
* @return void
*/
void i2c_demo(void)
{
/* Configure pad and pinmux firstly! */
board_i2c_master_init();
board_i2c_slave_init();
/* Initialize i2c peripheral */
driver_i2c_master_init();
driver_i2c_slave_init();
/* Initialize gdma peripheral */
gdma_i2c_slave_tx_init();
gdma_i2c_master_rx_init();
i2c_master_send_read_cmd();
}
/**
* @brief Entry of app code
* @return int (To avoid compile warning)
*/
int main(void)
{
extern uint32_t random_seed_value;
srand(random_seed_value);
__enable_irq();
i2c_demo();
while (1)
{
__nop();
__nop();
__nop();
__nop();
__nop();
__nop();
}
}
/**
* @brief I2C1 interrupt handler function.
* @param No parameter.
* @return void
*/
void I2C1_Handler(void)
{
/* Notes: DBG_DIRECT is only used for debug demo, do not use in app!
In app project, the APP_PRINT_INFO can be used.
*/
// DBG_DIRECT("I2C1_Handler!");
if (I2C_GetINTStatus(I2C1, I2C_INT_RD_REQ) == SET)
{
// DBG_DIRECT("I2C1_Handler I2C_INT_RD_REQ!");
GDMA_Cmd(I2C1_GDMA_CHANNEL_NUM, ENABLE);
//Add user code here
/* Clear interrupt */
I2C_ClearINTPendingBit(I2C1, I2C_INT_RD_REQ);
I2C_INTConfig(I2C1, I2C_INT_RD_REQ, DISABLE);
}
}
/**
* @brief GDMA channel interrupt handler function.
* @param No parameter.
* @return void
*/
void I2C1_GDMA_Channel_Handler(void)
{
GDMA_INTConfig(I2C1_GDMA_CHANNEL_NUM, GDMA_INT_Transfer, DISABLE);
/* Notes: DBG_DIRECT is only used for debug demo, do not use in app!
In app project, the APP_PRINT_INFO can be used.
*/
DBG_DIRECT("In I2C1_GDMA_Channel_Handler! I2C slave send data by GDMA successfully");
//Add user code here
GDMA_ClearINTPendingBit(I2C1_GDMA_CHANNEL_NUM, GDMA_INT_Transfer);
}
/**
* @brief GDMA channel interrupt handler function.
* @param No parameter.
* @return void
*/
void I2C0_GDMA_Channel_Handler(void)
{
GDMA_INTConfig(I2C0_GDMA_CHANNEL_NUM, GDMA_INT_Transfer, DISABLE);
/* Notes: DBG_DIRECT is only used for debug demo, do not use in app!
In app project, the APP_PRINT_INFO can be used.
*/
DBG_DIRECT("I2C0_GDMA_Channel_Handler!I2C master read data by GDMA successfully");
//Add user code here
GDMA_ClearINTPendingBit(I2C0_GDMA_CHANNEL_NUM, GDMA_INT_Transfer);
for (uint32_t i = 0; i < GDMA_TRANSFER_SIZE; i++)
{
if (GDMA_I2C_Send_Buf[i] != GDMA_I2C_Recv_Buf[i])
{
DBG_DIRECT(" Data transmission error! GDMA_Send_Buf = %d, GDMA_Recv_Buf = %d",
GDMA_I2C_Send_Buf[i], GDMA_I2C_Recv_Buf[i]);
}
GDMA_I2C_Recv_Buf[i] = 0;
}
}
/**
* @brief GDMA channel interrupt handler function.
* @param No parameter.
* @return void
*/
void I2C0_READ_CMD_GDMA_Channel_Handler(void)
{
GDMA_INTConfig(I2C0_READ_CMD_GDMA_CHANNEL_NUM, GDMA_INT_Transfer, DISABLE);
/* Notes: DBG_DIRECT is only used for debug demo, do not use in app!
In app project, the APP_PRINT_INFO can be used.
*/
DBG_DIRECT("I2C0_READ_CMD_GDMA2_Channel_Handler!");
//Add user code here
GDMA_ClearINTPendingBit(I2C0_READ_CMD_GDMA_CHANNEL_NUM, GDMA_INT_Transfer);
}
/******************* (C) COPYRIGHT 2018 Realtek Semiconductor Corporation *****END OF FILE****/
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