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/USART/Interrupt/main.c | 321 +++++++++++++++++++++++++++ 1 file changed, 321 insertions(+) create mode 100755 src/stm32lib/examples/USART/Interrupt/main.c (limited to 'src/stm32lib/examples/USART/Interrupt/main.c') diff --git a/src/stm32lib/examples/USART/Interrupt/main.c b/src/stm32lib/examples/USART/Interrupt/main.c new file mode 100755 index 0000000..d92854a --- /dev/null +++ b/src/stm32lib/examples/USART/Interrupt/main.c @@ -0,0 +1,321 @@ +/******************** (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" +#include "platform_config.h" + +/* Private typedef -----------------------------------------------------------*/ +typedef enum { FAILED = 0, PASSED = !FAILED} TestStatus; + +/* Private define ------------------------------------------------------------*/ +#define TxBufferSize1 (countof(TxBuffer1) - 1) +#define TxBufferSize2 (countof(TxBuffer2) - 1) +#define RxBufferSize1 TxBufferSize2 +#define RxBufferSize2 TxBufferSize1 + +/* Private macro -------------------------------------------------------------*/ +#define countof(a) (sizeof(a) / sizeof(*(a))) + +/* Private variables ---------------------------------------------------------*/ +USART_InitTypeDef USART_InitStructure; +u8 TxBuffer1[] = "USART Interrupt Example: USART1 -> USART2 using Interrupt"; +u8 TxBuffer2[] = "USART Interrupt Example: USART2 -> USART1 using Interrupt"; +u8 RxBuffer1[RxBufferSize1]; +u8 RxBuffer2[RxBufferSize2]; +vu8 TxCounter1 = 0x00; +vu8 TxCounter2 = 0x00; +vu8 RxCounter1 = 0x00; +vu8 RxCounter2 = 0x00; +u8 NbrOfDataToTransfer1 = TxBufferSize1; +u8 NbrOfDataToTransfer2 = TxBufferSize2; +u8 NbrOfDataToRead1 = RxBufferSize1; +u8 NbrOfDataToRead2 = RxBufferSize2; +volatile TestStatus TransferStatus1 = FAILED; +volatile TestStatus TransferStatus2 = 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(); + + /* Configure the GPIO ports */ + GPIO_Configuration(); + +/* USART1 and USART2 configuration ------------------------------------------------------*/ + /* USART and USART2 configured as follow: + - BaudRate = 9600 baud + - Word Length = 8 Bits + - One Stop Bit + - No parity + - Hardware flow control disabled (RTS and CTS signals) + - Receive and transmit enabled + */ + USART_InitStructure.USART_BaudRate = 9600; + USART_InitStructure.USART_WordLength = USART_WordLength_8b; + USART_InitStructure.USART_StopBits = USART_StopBits_1; + USART_InitStructure.USART_Parity = USART_Parity_No; + USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; + USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; + + /* Configure USART1 */ + USART_Init(USART1, &USART_InitStructure); + /* Configure USART2 */ + USART_Init(USART2, &USART_InitStructure); + + /* Enable USART1 Receive and Transmit interrupts */ + USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); + USART_ITConfig(USART1, USART_IT_TXE, ENABLE); + + /* Enable USART2 Receive and Transmit interrupts */ + USART_ITConfig(USART2, USART_IT_RXNE, ENABLE); + USART_ITConfig(USART2, USART_IT_TXE, ENABLE); + + /* Enable the USART1 */ + USART_Cmd(USART1, ENABLE); + /* Enable the USART2 */ + USART_Cmd(USART2, ENABLE); + + /* Wait until end of transmission from USART1 to USART2 */ + while(RxCounter2 < RxBufferSize2) + { + } + + /* Wait until end of transmission from USART2 to USART1 */ + while(RxCounter1 < RxBufferSize1) + { + } + + /* Check the received data with the send ones */ + TransferStatus1 = Buffercmp(TxBuffer2, RxBuffer1, RxBufferSize1); + /* TransferStatus1 = PASSED, if the data transmitted from USART2 and + received by USART1 are the same */ + /* TransferStatus1 = FAILED, if the data transmitted from USART2 and + received by USART1 are different */ + TransferStatus2 = Buffercmp(TxBuffer1, RxBuffer2, RxBufferSize2); + /* TransferStatus2 = PASSED, if the data transmitted from USART1 and + received by USART2 are the same */ + /* TransferStatus2 = FAILED, if the data transmitted from USART1 and + received by USART2 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 USART1, GPIOA, GPIOx and AFIO clocks */ + RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOx + | RCC_APB2Periph_AFIO, ENABLE); + /* Enable USART2 clock */ + RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, 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; + +#ifdef USE_STM3210B_EVAL + /* Enable the USART2 Pins Software Remapping */ + GPIO_PinRemapConfig(GPIO_Remap_USART2, ENABLE); +#endif + + /* Configure USART1 Rx (PA.10) as input floating */ + GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; + GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; + GPIO_Init(GPIOA, &GPIO_InitStructure); + + /* Configure USART2 Rx as input floating */ + GPIO_InitStructure.GPIO_Pin = GPIO_RxPin; + GPIO_Init(GPIOx, &GPIO_InitStructure); + + /* Configure USART1 Tx (PA.09) as alternate function push-pull */ + GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; + GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; + GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; + GPIO_Init(GPIOA, &GPIO_InitStructure); + + /* Configure USART2 Tx as alternate function push-pull */ + GPIO_InitStructure.GPIO_Pin = GPIO_TxPin; + GPIO_Init(GPIOx, &GPIO_InitStructure); +} + +/******************************************************************************* +* Function Name : NVIC_Configuration +* Description : Configures the nested vectored interrupt controller. +* Input : None +* Output : None +* Return : None +*******************************************************************************/ +void NVIC_Configuration(void) +{ + NVIC_InitTypeDef NVIC_InitStructure; + +#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 + + /* Configure the NVIC Preemption Priority Bits */ + NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0); + + /* Enable the USART1 Interrupt */ + NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQChannel; + NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; + NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; + NVIC_Init(&NVIC_InitStructure); + + /* Enable the USART2 Interrupt */ + NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQChannel; + NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; + NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; + NVIC_Init(&NVIC_InitStructure); +} + +/******************************************************************************* +* 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