- /**************************************************************************//**
- * [url=home.php?mod=space&uid=288409]@file[/url] main.c
- * [url=home.php?mod=space&uid=895143]@version[/url] V2.0
- * $Revision: 4 $
- * $Date: 15/03/04 9:49a $
- * [url=home.php?mod=space&uid=247401]@brief[/url] Demonstrate how to communicate with an off-chip SPI slave device. This sample code needs to work with SPI_SlaveMode.
- *
- * @note
- * Copyright (C) 2015 Nuvoton Technology Corp. All rights reserved.
- *
- ******************************************************************************/
- #include <stdio.h>
- #include "NUC505Series.h"
- #define TEST_COUNT 16
- uint32_t g_au32SourceData[TEST_COUNT];
- uint32_t g_au32DestinationData[TEST_COUNT];
- volatile uint32_t g_u32TxDataCount;
- volatile uint32_t g_u32RxDataCount;
- /* Function prototype declaration */
- void SYS_Init(void);
- void UART0_Init(void);
- void SPI1_Init(void);
- /* ------------- */
- /* Main function */
- /* ------------- */
- int main(void)
- {
- uint32_t u32DataCount;
- /* Init System, IP clock and multi-function I/O. */
- SYS_Init();
-
- /* Init UART0 to 115200-8n1 for print message */
- UART0_Init();
-
- /* Init SPI1, IP clock and multi-function I/O */
- SPI1_Init();
- printf("\n\n");
- printf("+--------------------------------------------------------+\n");
- printf("| SPI Master Mode Sample Code |\n");
- printf("+--------------------------------------------------------+\n");
- printf("\n");
- printf("Configure SPI1 as a master.\n");
- printf("Bit length of a transaction: 32\n");
- printf("The I/O connection for SPI1:\n");
- printf(" SPI1_SS (PB.10)\n SPI1_CLK (PB.11)\n");
- printf(" SPI1_MOSI (PB.12)\n SPI1_MISO (PB.13)\n\n");
- printf("SPI controller will transfer %d data to a off-chip slave device.\n", TEST_COUNT);
- printf("In the meanwhile the SPI controller will receive %d data from the off-chip slave device.\n", TEST_COUNT);
- printf("After the transfer is done, the %d received data will be printed out.\n", TEST_COUNT);
- printf("The SPI master configuration is ready.\n");
- for(u32DataCount = 0; u32DataCount < TEST_COUNT; u32DataCount++)
- {
- /* Write the initial value to source buffer */
- g_au32SourceData[u32DataCount] = 0x00550000 + u32DataCount;
- /* Clear destination buffer */
- g_au32DestinationData[u32DataCount] = 0;
- }
- SPI_ENABLE(SPI1);
- printf("Before starting the data transfer, make sure the slave device is ready. Press any key to start the transfer.");
- getchar();
- printf("\n");
- /* Set TX FIFO threshold, enable TX FIFO threshold interrupt and RX FIFO time-out interrupt */
- SPI_SetFIFO(SPI1, 4, 4);
- SPI_EnableInt(SPI1, SPI_FIFO_TXTH_INT_MASK | SPI_FIFO_RXTO_INT_MASK);
- g_u32TxDataCount = 0;
- g_u32RxDataCount = 0;
- NVIC_EnableIRQ(SPI1_IRQn);
- /* Wait for transfer done */
- while(g_u32RxDataCount < TEST_COUNT);
- /* Print the received data */
- printf("Received data:\n");
- for(u32DataCount = 0; u32DataCount < TEST_COUNT; u32DataCount++)
- {
- printf("%d:\t0x%X\n", u32DataCount, g_au32DestinationData[u32DataCount]);
- }
- /* Disable TX FIFO threshold interrupt and RX FIFO time-out interrupt */
- SPI_DisableInt(SPI1, SPI_FIFO_TXTH_INT_MASK | SPI_FIFO_RXTO_INT_MASK);
- NVIC_DisableIRQ(SPI1_IRQn);
- printf("The data transfer was done.\n");
- printf("\n\nExit SPI driver sample code.\n");
- /* Disable SPI1 peripheral clock */
- SPI_Close(SPI1);
- while(1);
- }
- void SPI1_IRQHandler(void)
- {
- uint32_t u32Tmp;
-
- /* Check RX EMPTY flag */
- while(SPI_GET_RX_FIFO_EMPTY_FLAG(SPI1) == 0)
- {
- u32Tmp = g_u32RxDataCount;
- /* Read RX FIFO */
- g_au32DestinationData[u32Tmp++] = SPI_READ_RX(SPI1);
- g_u32RxDataCount = u32Tmp;
- }
- /* Check TX FULL flag and TX data count */
- while((SPI_GET_TX_FIFO_FULL_FLAG(SPI1) == 0) && (g_u32TxDataCount < TEST_COUNT))
- {
- /* Write to TX FIFO */
- SPI_WRITE_TX(SPI1, g_au32SourceData[g_u32TxDataCount++]);
- }
- if(g_u32TxDataCount >= TEST_COUNT)
- SPI_DisableInt(SPI1, SPI_FIFO_TXTH_INT_MASK); /* Disable TX FIFO threshold interrupt */
- /* Check the RX FIFO time-out interrupt flag */
- if(SPI_GetIntFlag(SPI1, SPI_FIFO_RXTO_INT_MASK))
- {
- /* If RX FIFO is not empty, read RX FIFO. */
- while(SPI_GET_RX_FIFO_EMPTY_FLAG(SPI1) == 0)
- {
- u32Tmp = g_u32RxDataCount;
- g_au32DestinationData[u32Tmp++] = SPI_READ_RX(SPI1);
- g_u32RxDataCount = u32Tmp;
- }
- }
- }
- void SYS_Init(void)
- {
- /*---------------------------------------------------------------------------------------------------------*/
- /* Init System Clock */
- /*---------------------------------------------------------------------------------------------------------*/
- /* Unlock protected registers */
- //SYS_UnlockReg();
-
- /* Enable XTAL */
- CLK->PWRCTL |= CLK_PWRCTL_HXTEN_Msk;
- CLK_SetCoreClock(FREQ_96MHZ);
-
- /* PCLK divider */
- CLK_SetModuleClock(PCLK_MODULE, NULL, 1);
-
- /* Lock protected registers */
- //SYS_LockReg();
-
- }
- void UART0_Init(void)
- {
- /* Enable UART0 Module clock */
- CLK_EnableModuleClock(UART0_MODULE);
- /* UART0 module clock from EXT */
- CLK_SetModuleClock(UART0_MODULE, CLK_UART0_SRC_EXT, 0);
- /* Reset IP */
- SYS_ResetModule(UART0_RST);
- /* Configure UART0 and set UART0 Baud-rate */
- UART_Open(UART0, 115200);
- /*---------------------------------------------------------------------------------------------------------*/
- /* Init I/O Multi-function */
- /*---------------------------------------------------------------------------------------------------------*/
- /* Configure multi-function pins for UART0 RXD and TXD */
- SYS->GPB_MFPL = (SYS->GPB_MFPL & (~SYS_GPB_MFPL_PB0MFP_Msk) ) | SYS_GPB_MFPL_PB0MFP_UART0_TXD;
- SYS->GPB_MFPL = (SYS->GPB_MFPL & (~SYS_GPB_MFPL_PB1MFP_Msk) ) | SYS_GPB_MFPL_PB1MFP_UART0_RXD;
-
- }
- void SPI1_Init(void)
- {
- /* Enable SPI1 Module clock */
- CLK_EnableModuleClock(SPI1_MODULE);
- /* SPI1 module clock from EXT */
- CLK_SetModuleClock(SPI1_MODULE, CLK_SPI1_SRC_PLL, 0);
- /* Reset IP */
- SYS_ResetModule(SPI1_RST);
- /*---------------------------------------------------------------------------------------------------------*/
- /* Init I/O Multi-function */
- /*---------------------------------------------------------------------------------------------------------*/
- /* Configure multi-function pins for SPI1 */
- SYS->GPB_MFPH = (SYS->GPB_MFPH & (~SYS_GPB_MFPH_PB10MFP_Msk) ) | SYS_GPB_MFPH_PB10MFP_SPI1_SS;
- SYS->GPB_MFPH = (SYS->GPB_MFPH & (~SYS_GPB_MFPH_PB11MFP_Msk) ) | SYS_GPB_MFPH_PB11MFP_SPI1_CLK;
- SYS->GPB_MFPH = (SYS->GPB_MFPH & (~SYS_GPB_MFPH_PB12MFP_Msk) ) | SYS_GPB_MFPH_PB12MFP_SPI1_MOSI;
- SYS->GPB_MFPH = (SYS->GPB_MFPH & (~SYS_GPB_MFPH_PB13MFP_Msk) ) | SYS_GPB_MFPH_PB13MFP_SPI1_MISO;
- /*---------------------------------------------------------------------------------------------------------*/
- /* Init SPI */
- /*---------------------------------------------------------------------------------------------------------*/
- /* Configure SPI1 as a master, SPI clock rate 200 KHz,
- clock idle low, 32-bit transaction, drive output on falling clock edge and latch input on rising edge. */
- SPI_Open(SPI1, SPI_MASTER, SPI_MODE_0, 32, 200000);
- /* Enable the automatic hardware slave selection function. Select the SPI1_SS pin and configure as low-active. */
- SPI_EnableAutoSS(SPI1, SPI_SS, SPI_SS_ACTIVE_LOW);
- }
- /*** (C) COPYRIGHT 2015 Nuvoton Technology Corp. ***/
|