From 32e57dac2e61e79b029593eb4d34d727bcc10678 Mon Sep 17 00:00:00 2001 From: iperry Date: Thu, 17 Dec 2009 02:37:07 +0000 Subject: Initial commit of library code, moved from leaftest repo git-svn-id: https://leaflabs.googlecode.com/svn/trunk/library@69 749a229e-a60e-11de-b98f-4500b42dc123 --- src/stm32lib/examples/SPI/DMA/main.c | 291 +++++++++++++++++++++++++++++++++++ 1 file changed, 291 insertions(+) create mode 100755 src/stm32lib/examples/SPI/DMA/main.c (limited to 'src/stm32lib/examples/SPI/DMA/main.c') diff --git a/src/stm32lib/examples/SPI/DMA/main.c b/src/stm32lib/examples/SPI/DMA/main.c new file mode 100755 index 0000000..8c332da --- /dev/null +++ b/src/stm32lib/examples/SPI/DMA/main.c @@ -0,0 +1,291 @@ +/******************** (C) COPYRIGHT 2008 STMicroelectronics ******************** +* File Name : main.c +* Author : MCD Application Team +* Version : V2.0.1 +* Date : 06/13/2008 +* Description : Main program body +******************************************************************************** +* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS +* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME. +* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT, +* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE +* CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING +* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. +*******************************************************************************/ + +/* Includes ------------------------------------------------------------------*/ +#include "stm32f10x_lib.h" + +/* Private typedef -----------------------------------------------------------*/ +typedef enum {FAILED = 0, PASSED = !FAILED} TestStatus; + +/* Private define ------------------------------------------------------------*/ +#define SPI2_DR_Address 0x4000380C +#define BufferSize 32 + +/* Private macro -------------------------------------------------------------*/ +/* Private variables ---------------------------------------------------------*/ +SPI_InitTypeDef SPI_InitStructure; +DMA_InitTypeDef DMA_InitStructure; +GPIO_InitTypeDef GPIO_InitStructure; + +u8 SPI1_Buffer_Tx[BufferSize] = {0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, + 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, + 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, + 0x1C, 0x1D, 0x1E, 0x1F, 0x20}; +u8 SPI2_Buffer_Rx[BufferSize]; +u8 TxIdx = 0; +volatile TestStatus TransferStatus = FAILED; +ErrorStatus HSEStartUpStatus; + +/* Private function prototypes -----------------------------------------------*/ +void RCC_Configuration(void); +void GPIO_Configuration(void); +void NVIC_Configuration(void); +TestStatus Buffercmp(u8* pBuffer1, u8* pBuffer2, u16 BufferLength); + +/* Private functions ---------------------------------------------------------*/ + +/******************************************************************************* +* Function Name : main +* Description : Main program +* Input : None +* Output : None +* Return : None +*******************************************************************************/ +int main(void) +{ +#ifdef DEBUG + debug(); +#endif + + /* System clocks configuration ---------------------------------------------*/ + RCC_Configuration(); + + /* NVIC configuration ------------------------------------------------------*/ + NVIC_Configuration(); + + /* GPIO configuration ------------------------------------------------------*/ + GPIO_Configuration(); + + /* DMA1 channel4 configuration ---------------------------------------------*/ + DMA_DeInit(DMA1_Channel4); + DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)SPI2_DR_Address; + DMA_InitStructure.DMA_MemoryBaseAddr = (u32)SPI2_Buffer_Rx; + DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; + DMA_InitStructure.DMA_BufferSize = BufferSize; + DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; + DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; + DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte; + DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte; + DMA_InitStructure.DMA_Mode = DMA_Mode_Normal; + DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh; + DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; + DMA_Init(DMA1_Channel4, &DMA_InitStructure); + + /* SPI1 configuration ------------------------------------------------------*/ + SPI_InitStructure.SPI_Direction = SPI_Direction_1Line_Tx; + SPI_InitStructure.SPI_Mode = SPI_Mode_Master; + SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; + SPI_InitStructure.SPI_CPOL = SPI_CPOL_High; + SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge; + SPI_InitStructure.SPI_NSS = SPI_NSS_Hard; + SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4; + SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; + SPI_InitStructure.SPI_CRCPolynomial = 7; + SPI_Init(SPI1, &SPI_InitStructure); + + /* SPI2 configuration ------------------------------------------------------*/ + SPI_InitStructure.SPI_Direction = SPI_Direction_1Line_Rx; + SPI_InitStructure.SPI_Mode = SPI_Mode_Slave; + SPI_Init(SPI2, &SPI_InitStructure); + + /* Enable SPI1 NSS output for master mode */ + SPI_SSOutputCmd(SPI1, ENABLE); + + /* Enable SPI2 Rx request */ + SPI_I2S_DMACmd(SPI2, SPI_I2S_DMAReq_Rx, ENABLE); + + /* Enable SPI2 */ + SPI_Cmd(SPI2, ENABLE); + /* Enable SPI1 */ + SPI_Cmd(SPI1, ENABLE); + + /* Enable DMA1 Channel4 */ + DMA_Cmd(DMA1_Channel4, ENABLE); + + /* Transfer procedure */ + while (TxIdx < BufferSize) + { + /* Wait for SPI1 Tx buffer empty */ + while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET); + /* Send SPI1 data */ + SPI_I2S_SendData(SPI1, SPI1_Buffer_Tx[TxIdx++]); + } + + /* Wait for DMA1 channel4 transfer complete */ + while (!DMA_GetFlagStatus(DMA1_FLAG_TC4)); + + /* Check the corectness of written data */ + TransferStatus = Buffercmp(SPI2_Buffer_Rx, SPI1_Buffer_Tx, BufferSize); + /* TransferStatus = PASSED, if the transmitted and received data + are equal */ + /* TransferStatus = FAILED, if the transmitted and received data + are different */ + + while (1) + {} +} + +/******************************************************************************* +* Function Name : RCC_Configuration +* Description : Configures the different system clocks. +* Input : None +* Output : None +* Return : None +*******************************************************************************/ +void RCC_Configuration(void) +{ + /* RCC system reset(for debug purpose) */ + RCC_DeInit(); + + /* Enable HSE */ + RCC_HSEConfig(RCC_HSE_ON); + + /* Wait till HSE is ready */ + HSEStartUpStatus = RCC_WaitForHSEStartUp(); + + if (HSEStartUpStatus == SUCCESS) + { + /* Enable Prefetch Buffer */ + FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable); + + /* Flash 2 wait state */ + FLASH_SetLatency(FLASH_Latency_2); + + /* HCLK = SYSCLK */ + RCC_HCLKConfig(RCC_SYSCLK_Div1); + + /* PCLK2 = HCLK */ + RCC_PCLK2Config(RCC_HCLK_Div1); + + /* PCLK1 = HCLK/2 */ + RCC_PCLK1Config(RCC_HCLK_Div2); + + /* PLLCLK = 8MHz * 9 = 72 MHz */ + RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9); + + /* Enable PLL */ + RCC_PLLCmd(ENABLE); + + /* Wait till PLL is ready */ + while (RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET) + {} + + /* Select PLL as system clock source */ + RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); + + /* Wait till PLL is used as system clock source */ + while (RCC_GetSYSCLKSource() != 0x08) + {} + } + + /* Enable peripheral clocks --------------------------------------------------*/ + /* DMA1 clock enable */ + RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE); + + /* GPIOA, GPIOB and SPI1 clock enable */ + RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | + RCC_APB2Periph_SPI1, ENABLE); + + /* SPI2 Periph clock enable */ + RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE); +} + +/******************************************************************************* +* Function Name : GPIO_Configuration +* Description : Configures the different GPIO ports. +* Input : None +* Output : None +* Return : None +*******************************************************************************/ +void GPIO_Configuration(void) +{ + GPIO_InitTypeDef GPIO_InitStructure; + + /* Configure SPI1 pins: NSS, SCK, MISO and MOSI ----------------------------*/ + GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7; + GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; + GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; + GPIO_Init(GPIOA, &GPIO_InitStructure); + + /* Configure SPI2 pins: NSS, SCK, MISO and MOSI ----------------------------*/ + GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12 | GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15; + GPIO_Init(GPIOB, &GPIO_InitStructure); +} + +/******************************************************************************* +* Function Name : NVIC_Configuration +* Description : Configure the nested vectored interrupt controller. +* Input : None +* Output : None +* Return : None +*******************************************************************************/ +void NVIC_Configuration(void) +{ +#ifdef VECT_TAB_RAM + /* Set the Vector Table base location at 0x20000000 */ + NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0); +#else /* VECT_TAB_FLASH */ + /* Set the Vector Table base location at 0x08000000 */ + NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0); +#endif +} + +/******************************************************************************* +* Function Name : Buffercmp +* Description : Compares two buffers. +* Input : - pBuffer1, pBuffer2: buffers to be compared. +* : - BufferLength: buffer's length +* Output : None +* Return : PASSED: pBuffer1 identical to pBuffer2 +* FAILED: pBuffer1 differs from pBuffer2 +*******************************************************************************/ +TestStatus Buffercmp(u8* pBuffer1, u8* pBuffer2, u16 BufferLength) +{ + while (BufferLength--) + { + if (*pBuffer1 != *pBuffer2) + { + return FAILED; + } + + pBuffer1++; + pBuffer2++; + } + + return PASSED; +} + +#ifdef DEBUG +/******************************************************************************* +* Function Name : assert_failed +* Description : Reports the name of the source file and the source line number +* where the assert_param error has occurred. +* Input : - file: pointer to the source file name +* - line: assert_param error line source number +* Output : None +* Return : None +*******************************************************************************/ +void assert_failed(u8* file, u32 line) +{ + /* User can add his own implementation to report the file name and line number, + ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ + + /* Infinite loop */ + while (1) + {} +} +#endif + +/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/ -- cgit v1.2.3